novell

About novell

This author has not yet filled in any details.
So far novell has created 12 blog entries.

Silicone Antifoam and Defoamer Practical Guide

Antifoam and DefoamerWhat is Silicone Antifoam and Defoamer?

Silicone (polydimethylsiloxane，Ref. Wikipedia – Defoamer) has been used as an antifoam for more than 40 years and has been rapidly and extensively used in various fields since the 1980s. Silicone antifoam can effectively remove and suppress foam in the production process.

silicone antifoams defoamer differenceAntifoam VS defoamer

Even though we call them antifoam, they are used in two ways to help control foam in your system. When used as antifoam, they help prevent foam from developing. When used as defoamer, they help destroy or knock down foam after it has occurred.

silicone antifoams defoamer explainDefoaming way

Knockdown refers to the reduction in foam height that occurs when the antifoam is added. Speed of knock down is also important, so is persistence, the length of time the antifoam continues to perform. Different foaming situations require different degrees speed of knock-down, and persistence.

Silicone antifoaming agentHow silicone antifoam agents work?

Silicone has low surface and interfacial tensions (see Fig.1). This enables it to flow easily over the foam wall, and seeks out openings and occupies them, causing the wall to thin and collapse.

To effectively destroy foam, reducing surface tension is key. Silicone antifoaming agent work by lowering the surface tension of liquids, preventing bubbles from forming and enabling them to break apart more easily.

By dispersing smaller bubbles and inhibiting bubble growth, it prevent large foam formations. This ensures stable, long-lasting defoaming, vital in industrial processes where foam control is crucial.

These actions, including surface tension reduction and bubble dispersion, are essential to achieving effective foam destruction and ensuring consistent, high-quality results in various applications.

Surface tension of common liquid

Liquid surface tension (mN/m)
Water 73
Alkyd resin 33 – 60
Butyl glycol ether 30
Toluene 29
Isopropyl alcohol 22
Octane 21
Trisiloxane 17
Hexamethylsiloxane 16

silicone antifoamsSelecting the right silicone antifoam is crucial for optimizing coating performance, it plays an essential role in controlling foam, ensuring a smooth application and preventing defects.

Considered key characteristics included dispersibility, defoaming speed, and persistent foam suppression. These factors help balance efficiency, cost, and appearance, improving overall product quality.

In-depth evaluation of these traits will guide your selection process. Proper testing methods will ensure antifoam meet your specific needs, delivering superior performance in various applications. Below is 3 regular testing method:

Test method Explain
Stirring test
 Evaluation of efficiency and separation tendency of defoamer:
Complete formulation (include defoamer) is stirred with toothed dissolver at high speed (e.g. 3 min at 4000 rpm), Determined by weight and get density of formulation.
Repeat test after storage (e.g. 2 weeks at 50°C) and get defoaming efficiency.
Bubbling test
 (see Fig.1) Add foaming liquid and defoaming agent into cylinder, keep it constant at set temperature, blow air into it at a set flow rate, and record change pattern of foam volume (including volume sum of foam and medium) over time.
Shake test
 Add certain amount of foaming liquid in the cylinder with plug-in, each time under the same number of shake flask, static observation of foam height and defoaming time.

silicone antifoams Bubbling test

Silicone Based AntifoamSilicone Based AntifoamsSilicone based antifoam main active substance is polysiloxanes (see Fig. 1)

SINOSIL offer product in a variety of forms to meet the needs of a wide range of systems and applications. Below is regular type from us:

Fluids use in non-aqueous systems. They are inert and not conducive to bacterial growth, available in a wide range of viscosities.
Compounds Scontain a suspension of finely-powdered silica to enhance their defoaming efficiency and designed primarily for non-aqueous systems.
Emulsions ideal for controlling foam in aqueous systems.
Dispersions  ideal for controlling foam in aqueous systems.
Powder often used in dry products to help prevent foaming and liquids are added.

SiliconeSilicone defoamers dilute process defoamer is often diluted to improve application ease, reduce viscosity, and enhance dispersion in foaming systems. Proper dilution(see Fig1: dilute process) ensures faster defoaming without damaging the agent’s effectiveness. 

Below we will introduce the dilution method in two cases based on different use

Dilute method #1

  1. Weigh silicone defoamers
  2. Add water into antifoam, stir while adding water
  3. Add an acrylic thickener
  4. Add 20% NaOH solution until pH7-8
  5. Add proper amount of fungicide and stir well

Dilute Method #2

  1. Weigh water and silicone defoamers.
  2. Add an acrylic thickener to water
  3. Add 20% NaOH aqueous solution until pH7-8
  4. Add the thickened water to the antifoam and stir
  5. Add proper amount of fungicide and stir well

Highly surface-active with liquid surface tension values of approximately 20 mN/m, which means they tend to spread through the foam more quickly. Silicone defoamers prevent foam from occurring upstream and reduce it more quickly and efficiently when it does occur (known as the knockdown effect).

They are more resistant to chemical corrosion, temperature variations, and pH levels.

The quantities of silicone anti-foam products needed to achieve the required effects are much lower than other products and offer more durable lower surface tension, especially important in complex and long-lasting processes, which adds up to lower cost in use.

They are inert and less reactive, leading to fewer compatibility problems, therefore safer for people and the environment.

Silicone defoamers also tend to be more persistent.

Defoamer section is crucial for effective foam control. Factors like form, content, and application scenario must be carefully evaluated.

In selecting the best type and quantity of silicone defoamer, each application must be assessed separately. lt therefore best to evaluate several antifoams in each system to determine the type and concentration needed to assure optimum results.

End use of product containing the antifoam: Food contact / sensitive to de-wetting

Figure out working system temperature (high / low), pH value (high / neutral / low) and chemical nature of foaming system (aqueous / non-aqueous)

Make clear of your foam control goal, need fast defoaming (eliminate foam quickly), long-lasting antifoaming control (durability)

Antifoam will be direct use or use after dilute

Compatibility: Clear appearance /turbid formulation

Dosing accuracy: Concentration of antifoam

Pumping or spraying;

Process equipment: low shear, high shear

Add silicone based defoamers in formulation or on-site

Silicone defoamers play a crucial role in eliminating foam in various industries, but several factors affect their performance. 

The effectiveness of a silicone defoamer is determined by multiple factors including chemical composition, molecular weight, and solvent choice. Temperature and pH are also key determinants. At higher temperatures, defoamer becomes more active, while pH imbalances can reduce its efficiency. Below is simple explain for each item:

Chemical structure of silicone defoamers will affect defoaming effect and antifoaming time. For example, silicone defoamers contain a special group, which affect hydrophilicity and hydrophobicity, and finally affect defoaming performance.

Typically, a larger molecular weight of silicone defoamer leads to better defoaming and antifoaming effects. However, if the molecular weight is excessively high, it can reduce defoamer’s dispersibility.

The solvent affects dispersibility and stability of silicone defoamer. When the solvent is water, the defoamer exhibits better hydrophilicity, making it suitable for use in coatings and detergents. In contrast, if the solvent is organic, the dispersibility improves, making it more appropriate for surface coatings.

If the pH level of materials like coatings or adhesives is too low or too high, it will affect defoamer’s performance. Therefore, it is important to understand the pH level of foaming system

Normally, at higher temperatures, defoamers become more active, resulting in a faster defoaming speed. However, if the temperature is too high, the defoamer may degrade.

If the concentration is too low, the defoaming effect will be insufficient; if the concentration is too high, shelling may occur.

Application Technical requirement of silicone antifoam agents
Resin synthesis
 stable; economical; easy to use foam control agents
Industrial cleaning
 alkali-resistant; requires high defoaming efficiency; stable; compatible
Water treatment
 fast defoaming; stable; easy to use
Metalworking fluid
 good compatibility and durability; anti-filter filtration
Pulping
 alkali & high temperature resistant; adaptable to different pulp types (softwood/hardwood)
Textile printing and dyeing
 good compatibility; stable; high temperature resistant
Acrylic emulsion system
 good compatibility, no other adverse effects
Latex system
 excellent dispersibility and compatibility
Food and beverage processing
 safe; efficient; in line with food regulations in China and other countries and regions

silicone antifoams agent

Defoamers and Antifoams for Metal Working Fluid2025-10-21T01:07:36+00:00
Defoamers and Antifoams

Defoamers and Antifoams for Metal Working Fluid

Defoamer for Coating & Paint2025-10-21T01:08:05+00:00
defoamer for coating

Defoamer for Coating & Paint

Antifoam Agent and Defoamers for Pulp and Paper2025-10-21T01:08:33+00:00
Antifoam_Defoamer_for_Pulp_Paper

Antifoam Agent and Defoamers for Pulp and Paper

Overview

Silane Coupling Agents Practical Guide

Fundamental Chemistry and Mechanism

What is Silane Coupling Agents

Silane Coupling AgentSilane Coupling Agents (SCA) is an organosilane compound featuring two key reactive groups: an organofunctional group (R) and a hydrolyzable group (X) bonded to a silicon atom (Si). Its general structure is R-Si-(X)₃. The hydrolyzable group, often an alkoxy group like methoxy or ethoxy, reacts with moisture to produce silanol groups (Si-OH). These silanol groups then bond with hydroxyl groups on the surface of inorganic materials, such as glass, silica, or metal oxides, forming stable siloxane bonds (Si-O-Substrate).

The organofunctional group (R) is specifically designed to interact with or blend into the organic polymer matrix, such as epoxy, polyester, or rubber. This dual reactivity establishes a strong chemical connection—the “coupling”—between the two different materials. This mechanism is essential for enhancing interfacial adhesion and improving overall material performance.

Functions and benefits in composites

Silane Coupling Agents primarily enhance the bond between inorganic fillers or reinforcements and organic polymer matrices. (Ref. Silane coupling agents used for natural fiber/polymer composites: A review – ResearchGate) This stronger adhesion leads to several key advantages for the final composite material:

Benefit Description Industrial
Enhanced Mechanical Properties Significant increase in tensile strength, flexural strength, and impact resistance. Allows for lighter, stronger materials in automotive and aerospace applications.
Improved Electrical Properties Reduction in dielectric constant and dissipation factor, especially under wet conditions. Essential for high-performance electronic encapsulation and insulation.
Increased Hydrolytic Stability The stable siloxane bond prevents water from penetrating and weakening the interface. Extends the service life of materials exposed to high humidity or water.
Better Dispersion SCAs can modify the surface energy of fillers, leading to better dispersion in the polymer. Results in a more homogeneous composite with predictable performance.

Ref. A Guide to Silane Solutions: Adhesives and Sealants – AZoM

Difference vs adhesion promoter

Silane Coupling Agents (SCAs) act as adhesion promoters, but the term specifically refers to a unique category of organosilane compounds that enhance adhesion through a distinct chemical bridging process. Other adhesion promoters include a wider variety of substances, such as titanates, zirconates, or various primers, which often depend on physical entanglement, hydrogen bonding, or simple acid-base interactions.

The main difference is that SCAs create a covalent bond between inorganic and organic materials, offering a level of durability and hydrolytic stability that most other adhesion promoters cannot match

Structure and performance

Silane Coupling AgentsEffectiveness of a Silane Coupling Agents largely depends on its molecular structure, particularly the type of organofunctional group (R) and the length of the alkyl chain (linker) that connects it to the silicon atom.

  • Organofunctional Group (R): This group must be chemically compatible with the polymer matrix. For instance, an epoxy-functional silane, such as γ-glycidoxypropyltrimethoxysilane, works well with epoxy resins. In contrast, an amino-functional silane, like γ-aminopropyltriethoxysilane, is better suited for polyurethanes or phenolic materials. Using an incompatible functional group can lead to poor coupling efficiency.
  • Linker Length: The length of the alkyl chain between the silicon atom and the organofunctional group affects the molecule’s flexibility and mobility at the interface. Longer, more flexible linkers can enhance stress relaxation and durability, while shorter linkers tend to provide greater rigidity.

Selection, Application, and Process

Selection guide

Choosing the right Silane Coupling Agents is essential for formulating composites. This selection process mainly involves aligning the organofunctional group of the silane with the chemistry of the polymer matrix.

Polymer Matrix Recommended Silane Functional Group Example SCA
Epoxy, Phenolic, Polyimide Epoxy, Amino Glycidoxypropyltrimethoxysilane (GPTMS)
Unsaturated Polyester, Vinyl Ester Methacrylate, Vinyl Methacryloxypropyltrimethoxysilane (MPTMS)
Polyurethane, Nylon, Acrylic Amino Aminopropyltriethoxysilane (APTES)
Polyolefins (PE, PP) Vinyl, Mercapto Vinyltrimethoxysilane (VTMS)

SilaneCouplingAgents

Application areas

Silane Coupling Agents play an important role in nearly every sector of chemical and materials industry, especially when bonding different materials for optimal performance. Here are some key application areas:

  1. Composites: These agents treat glass fibers, carbon fibers, and mineral fillers in reinforced plastics, making them essential for the automotive, construction, and wind energy sectors.
  2. Coatings and Paints: They enhance adhesion, corrosion resistance, and scratch resistance on metal and glass surfaces.
  3. Adhesives and Sealants: Silane Coupling Agents improve bond strength and durability, especially in moisture-cured systems.
  4. Rubber and Tire Industry: They treat silica and clay fillers to enhance abrasion resistance and lower rolling resistance.
  5. Electronics: These agents are used in encapsulation and potting compounds to provide moisture protection and ensure thermal stability.

Process condition

To effectively treat inorganic fillers with a Silane Coupling Agent, it is crucial to manage several key factors:

  • Filler Surface Chemistry: The filler should have enough surface hydroxyl groups (such as those found in SiO₂ and Al₂O₃) to allow for a reaction with the silanol groups.
  • Moisture Content: Water plays a vital role in the hydrolysis of the silane. Insufficient water can hinder hydrolysis, while excessive water may cause the silane to self-condense, resulting in oligomers that are less effective.
  • pH of the Solution: Hydrolysis is typically accelerated by either an acid or a base. Maintaining an optimal pH (generally between 4 and 5 for most silanes) promotes quick and complete hydrolysis without premature condensation.
  • Concentration and Coverage: The Silane Coupling Agent should be applied in a quantity sufficient to create a monolayer on the filler surface. Over-application can waste resources and negatively affect mechanical properties

Application method

Application method for a Silane Coupling Agent depends on the type of inorganic substrate—whether it’s a filler, fiber, or surface—and the final manufacturing process.

Application Method Description Column 3 Column 4
Solution Treatment (Wet) Substrate is dipped or sprayed with a dilute aqueous or organic solution of the hydrolyzed silane. Fibers, large surfaces, pre-treatment of fillers. Consistent coverage with highly effective coupling.
Dry Blending Liquid silane is sprayed directly onto the filler powder during high-speed mixing. Fine particulate fillers (e.g., silica, clay). Cost-effective, single-step process, minimal solvent use.
In-Situ Addition silane is added directly to the polymer/filler mixture during compounding. Fillers in thermoset or thermoplastic processing. Simplifies manufacturing, but requires high shear mixing.

Used with natural fibers or bio-based polymers

Silane coupling agents are becoming more popular for treating natural fibers, such as wood flour, hemp, and jute, to improve the performance of bio-based polymers. Natural fibers tend to absorb water, making them incompatible with hydrophobic polymer matrices and resulting in low hydrolytic stability. By applying silane treatment, we can decrease the fiber’s water affinity and create strong chemical bonds with the polymer. This process significantly enhances the mechanical properties and water resistance of the resulting bio-composites

Concentrations and dosages

Dosage of a Silane Coupling Agents depend on the surface area of inorganic substrate. For most mineral fillers and glass fibers, recommended dosage is between 0.5% and 2.0% by weight of filler. This amount typically creates a complete monolayer on the filler surface. Using less than this optimal range may lead to incomplete coverage and weak bonding. Conversely, applying too much can create a weak layer of unreacted silane oligomers, which can diminish mechanical strength

Technical Performance and Stability

Improve the hydrolytic stability and mechanical properties

One of key advantages of using a Silane Coupling Agents (SCA) is the enhancement of hydrolytic stability. Water molecules are small enough to infiltrate the interface between untreated inorganic fillers and polymers, which can cause the polymer to separate from the filler. SCAs address this issue by creating strong, water-resistant siloxane bonds (Si-O-Si) with the inorganic surface. These covalent bonds are significantly more durable than the weaker secondary forces, such as van der Waals or hydrogen bonds, that typically govern adhesion in untreated systems.

By shielding the interface from water intrusion, SCAs help maintain the material’s integrity. This protection ensures that mechanical properties remain stable, even after extended exposure to high humidity or immersion in water.

Affecting factors

Moisture is a double-edged sword for Silane Coupling Agents. It is absolutely necessary for the initial hydrolysis step, which converts the alkoxy groups to reactive silanol groups. However, high humidity or excessive moisture during the curing or service life of the final product can be detrimental.
  • During Application: Controlled humidity is required for proper silanol formation and subsequent condensation.
  • During Service: While the siloxane bond is highly hydrolytically stable, prolonged exposure to hot, wet conditions can still lead to slow degradation of the interface. This is why the choice of the organofunctional group and the density of the silane layer are crucial for long-term durability.

Safety, handling, and storage

Silane Coupling Agents are specialized chemicals that require careful handling. Most SCAs are liquids and are classified as irritants, and some are flammable. Key guidelines include:
  • Ventilation: SCAs, particularly those with methoxy groups, release methanol upon hydrolysis, which requires adequate ventilation.
  • Personal Protective Equipment (PPE): Always use appropriate gloves, eye protection, and protective clothing.
  • Storage: SCAs are sensitive to moisture and heat. They must be stored in tightly sealed containers in a cool, dry, and well-ventilated area to prevent premature hydrolysis and polymerization.
  • Disposal: Follow local regulations for the disposal of organosilane compounds and their byproducts. Always consult the product’s Safety Data Sheet (SDS) for specific instructions

Featured Products

Amino Silane | Amino Propyl Silane2025-10-21T01:11:27+00:00
amino_silane

Amino Silane | Amino Propyl Silane

Fluoro Silane2025-10-21T01:12:15+00:00
Fluoro_Silane

Fluoro Silane

Phenyl Silane2025-10-21T01:12:24+00:00
Phenyl_Silane

Phenyl Silane

Overview

Silane Coupling Agent Manufacture Top10 in China

Top 10 Silane Coupling Agent Manufacture in China

Silane coupling agents play a crucial role in enhancing adhesion between organic and inorganic materials, making them essential in various industries, including coatings, adhesives, and composites.

China is home to several leading silane coupling agent manufacture, known for their innovation and production capacity. Below is a list of the top 10 silane coupling agent manufacture in China.

silane coupling agentOverview: DOWSIL is a brand under The Dow Chemical Company, which was formerly known as Dow Corning. It is a global leader in silicone technology and innovation, merging the strengths of both Dow and Dow Corning to enhance its silicone products and solutions across various industries.

Established: The brand was officially launched in 2018, following Dow’s acquisition of Dow Corning in 2016.

Location: DOWSIL operates globally, with numerous manufacturing bases across various countries.

Main Products: Silicone sealants, Adhesives, Coatings, Elastomers, Specialty fluids

20190513z337 Werk Burghausen 1 1040x1040 c centerOverview: Founded in 1914, WACKER is a renowned German company specializing in organic silicone sealants and other specialty chemicals. It has established itself as a leader in the silicone and ethylene chemistry sectors.

Established: 1914

Location:Headquartered in Munich, Germany, with over 20 production sites worldwide.

Main Products: Silicone products (sealants, adhesives), Polysilicon for solar cells, Binders for construction materials, Specialty polymers

d8b04279 2f05 4909 bb78 07677076a433 Overview: Established in 1998, Jianghan New Materials focuses on the research, development, production, and sales of functional organosilanes and other silicon-based new materials. The company went public in 2023.

Established: 1998

Location: Headquartered in China, with operations that include research and manufacturing facilities.

Main Products: Functional organosilanes, Silane coupling agents, Silicon-based new materials

chenguang Overview: Founded in 2001, Chenguang specializes in functional silane raw materials and intermediates. The company went public on the Shanghai Stock Exchange in 2020, becoming one of the largest manufacturers of organosilane coupling agents in China.

Established: 2001

Location: Based in China, with a comprehensive production facility.

Main Products: Functional silanes, Silane coupling agents, Intermediate chemicals for various applications

outlook01 Overview: Established in 2005, Hungpai focuses on functional silanes and nanomaterials. The company is listed on the stock exchange and is recognized for its contributions to the circular economy within the functional silane sector.

Established: 2005

Location: Headquartered in Jingdezhen, Jiangxi Province, China, with multiple subsidiaries across regions.

Products:Functional silanes, Nanomaterials, Specialty chemicals for automotive and construction industries

14225407 mJXB69WmykYIxCCu0L66api4esz99DO09iVSu5mipcOverview: Originating from the U.S. in 1938, MOMENTIVE is known for its high-performance silicone products. It was previously part of GE-Toshiba before becoming an independent entity.

Established: 1938

Location: Headquartered in the United States, with a global presence.

Main Products: Silicone sealants, Specialty coatings, High-tech materials for various applications

Evonik expands production capacity at Spanish probiotics factory Overview: EVONIK, formerly Degussa, is a leading specialty chemicals company from Germany that operates globally across several sectors including additives and smart materials.

Established: Originally established as Degussa in 2000, rebranded to EVONIK later.

Location: Headquartered in Essen, Germany, with over ten production sites in China alone.

Main Products: Specialty additives, Functional materials, Nutrition products

unnamed Overview: SUNFAR is a subsidiary of Sunfar Co., Ltd., specializing in organic silicon new materials and fine chemical products. It focuses on R&D, production, and sales of silane coupling agents.

Established: Listed as part of Sunfar Co., Ltd., which has been operational since its founding date around the early 2000s.

Location: Based in China, with extensive manufacturing capabilities.

Main Products: Silane coupling agents, Organic silicon products for various industries

Shin Etsu Chemical CoOverview: Established in 1926, Shin-Etsu is a leading Japanese supplier of high-tech materials, particularly known for its extensive range of silicone products used globally across multiple industries.

Established: 1926

Location: Headquartered in Japan, with production facilities worldwide.

Main Products: Silicone , Semiconductor materials, Chemical solutions for various industrial

fxze5 15qiedOverview: Founded in 1999, New Blue Sky specializes in functional silane product development, production, and sales. It has become one of China’s leading companies in this field with significant production capacity.

Established: 1999

Location: Based in China with extensive manufacturing operations.

Main Products: Silane crosslinking agents, Coupling agents, Various silanes and derivatives

Featured Products

Amino Silane | Amino Propyl Silane2025-10-21T01:11:27+00:00
amino_silane

Amino Silane | Amino Propyl Silane

Fluoro Silane2025-10-21T01:12:15+00:00
Fluoro_Silane

Fluoro Silane

Phenyl Silane2025-10-21T01:12:24+00:00
Phenyl_Silane

Phenyl Silane

Unveiling the New Face: A Journey of Innovation and Growth

Moment of transformation

We are proud to announce our rebranding as SINOSIL, jointly incorporated sales office by manufacturer, a change that reflects our dedication to innovation, growth, and an unwavering commitment to excellence.

As SINOSIL, we are excited to embark on this new chapter. It signifies our commitment to a future of possibilities and achievements. Thank you for being part of our story.

64212f1af8514ec45dbce82d Sustainable

Water Oil Repellent Agent | C6 Fluoropolymer

Water oil repellent agent C6 is alternative short-china C6 PFC versus long chain C8 PFC, providing sustainable alternatives for many applications, including textiles, leathers based on proven C6 chemistry. Chevell offers high performance properties with improved environmental and biological profiles.

What is C6?

  • C6 fluorinated polymers are proven safe for their intended use.
  • C6 fluoropolymer cannot break down to form PFOA or PFOS.
  • Innovative C6 WOR technology, excellent water oil repellency
  • Full product range to meet all performance demands.

Benefits: Chevell, the industry brand leader for valuable-performance barrier agents, performs listed below

  • Water repellency
  • Oil and grease repellency
  • Alcohol resistance
  • Soil resistance
  • Easy to clean property

Application

Industrial Workwear

Fluorine water oil repellent agent C6 from Chevell is ideal for tough and durable coatings for workwear in contact with oil and dirt such as in the automotive and chemical industries. Fabrics made using Chevell’s C6 repellent products are comfortable to wear and highly durable for industrial laundering.

Outdoor Leisure and Sportswear

Chevell fluorinated C6 water oil repellent provides a waterproof coating for outerwear and footwear designed for activities such as skiing, rambling, mountaineering and sailing. These waterproof characteristics mean it is widely used on tents, awnings and canopies to give protection from the elements.

Medical, Emergency Services

Chevell fluoropolymer C6 water oil repellent is suitable for use on surgical gowns, medical drapes, packs, protective masks in the medical industry.

As the industry leader, Chevell provdie multiple grades of both non-fluorinated and fluorinated( C8, C6 )  water oil repellent that provide excellent water and oil repellency to a variety of surfaces.

Through our well-developed polymer design and polymerization technology along with our comprehensive knowledge of water and oil repellency, our products excel in the marketplace.

Featured Products

Hydrophilic Silicone Oil

C8 Water Oil Soil Repllent

silicone antifoam

C6 Water Oil Soil Repellent

water repellent agent

C0 Durable Water Repellent

Water oil repellent finishing agent market trend

Silicone Solutions… Boundless Possibilities

What were trends shaping fabric water repellent market?

The fabric water repellent market is experiencing dynamic shifts. Innovations in Water oil repellent finishing agent are paving the way for sustainable and highly functional textiles.

Water oil repellent finishing agent technologies are evolving to meet demands for durability and environmental consciousness. These solutions enhance fabric protection without compromising breathability or comfort.

Advancements in formulation processes are making these agents more efficient, providing better performance against stains, moisture, and oils. The drive towards eco-friendly options also ensures that the future of fabric treatment remains both functional and sustainable.

Sustainable and Eco-Friendly water repellent finishing

There was a growing demand for eco-friendly and sustainable textile water oil repellent finishing agent.

Advanced Technologies of water repellent finishing

Advancements in nanotechnology and polymer science were driving the development of more effective and durable water repellent treatments. Innovations such as superhydrophobic coatings were gaining attention for their ability to create extremely water-repellent surfaces.

Application Specific water repellent finishing agent

The market was witnessing a trend towards fabric water repellents designed for specific applications. For example, Water and Oil repellent tailored for outdoor gear, sportswear, or industrial applications, each optimized for the unique requirements of those use cases.

Durable Water Repellency (DWR) in Apparel

In the apparel industry, there was a focus on durable water repellency (DWR) technologies that could withstand repeated wash cycles. Brands were looking for solutions that provided long-lasting water resistance without compromising the breathability and comfort of fabrics.

Water Repellent Agent

Multifunctional Finishes

Fabric treatments with multifunctional properties, such as stain resistance, UV protection, and antimicrobial features in addition to water repellency, were gaining popularity. This trend was driven by the desire for versatile and high-performance fabrics.

Growth in Outdoor and Sports

The outdoor and sports industries were significant consumers of water repellent fabrics. With an increasing focus on outdoor activities and sports, there was a corresponding rise in the demand for fabrics that could withstand various weather conditions.

SinoSil, an repellent supplier of choice

As the industry leader, SINOSIL provides multiple grades of both non-fluorinated and fluorinated( C8, C6 ) products that give excellent water and oil repellency to a variety of surfaces.
Through our well-developed polymer design and polymerization technology along with our comprehensive knowledge of water and oil repellency, our products excel in the marketplace!

64212f1af8514ec45dbce82d Sustainable

Featured Products

Fluorine Free Water Repellent | Hydrophobing Agent2025-10-21T01:15:22+00:00
Water oil repellent finishing agent

Fluorine Free Water Repellent | Hydrophobing Agent

C8 Water Oil Repellent2025-10-21T01:17:44+00:00
water repellent agent

C8 Water Oil Repellent

C6 Water Oil & Soil Repellent Agent2025-10-21T01:17:59+00:00
C6 Water Oil & Soil Repellent

C6 Water Oil & Soil Repellent Agent

How to Improve Textile Finishing Efficiency?

Silicone softeners are a crucial component in textile finishing, enhancing the softness and durability of fabrics. To fully grasp the significance of maximizing efficiency in silicone softener application, it’s essential to understand the fundamentals of these products and how they work.

image home

What is the Mechanism of Silicone Softener?

The mechanism behind silicone softeners lies in their molecular structure. Silicone softeners are composed of silicone-based polymers, which have a unique ability to form a lubricating film on the surface of the fabric fibers. This film reduces the friction between fibers, resulting in a smoother, softer texture.

What Makes Fabric Softener Work?

Fabric softeners, including silicone softeners, work by altering the surface properties of textile fibers. They reduce the friction between fibers, making the fabric feel smoother and softer to the touch. Additionally, fabric softeners can improve the drape and overall comfort of the textile.

What Makes Silicone More Flexible?

Silicone’s flexibility stems from its molecular structure, characterized by the presence of silicon-oxygen (Si-O) bonds. These bonds allow for flexibility while maintaining the stability and durability of the material. In silicone softeners, this flexibility is harnessed to create a soft and pliable feel on textiles.

What is the Mechanism of Softening Effect?

The softening effect of silicone-based softeners primarily occurs through the formation of a micro-thin film on the fabric’s surface. This film reduces inter-fiber friction, resulting in improved softness and flexibility. The silicone softener molecules align themselves on the fabric’s fibers, creating a lubricating layer that imparts a soft hand feel.

In conclusion, understanding the application and mechanism of silicone softeners is essential for textile manufacturers aiming to maximize efficiency in their usage. By selecting the right silicone softener, optimizing dosage, and implementing efficient application methods, manufacturers can achieve consistent, high-quality results in textile finishing. Additionally, knowledge of the underlying science behind silicone softeners can aid in product selection and process improvement.

Featured Products

Hydrophilic Silicone Oil

Block Silicone Oil

silicone antifoam

Silicone Antifoam

water repellent agent

Water & Oil Repellent

Non Fluorinated Water Repellent Agent Type

Non fluorinated water repellent do not contain any fluorocarbons, which have come under scrutiny due to their potential adverse effects on human health and the environment. These chemicals are widely utilized for manufacturing outdoor apparel, upholstery, footwear, and automobile components to provide water repellency without compromising on safety. Some of the significant players in the market are Huntsman Corporation, Daikin Industries, Nicca Chemical, Rudolf GmbH, Texchem UK Ltd, and main product include:

  • Paraffin based Fluorine-Free water repellent
  • Silicone based Fluorine-Free water repellent
  • Acrylic based Fluorine-Free water repellent
  • Polyurethane based Fluorine-Free water repellent
  • Nano-SiO2 based Fluorine-Free water repellent

Paraffin based durable Non fluorinated water repellent are rarely used alone in textiles. Silicone waterproofing agents features with excellent initial and durable (drying/drying) waterproof properties; the fabric surface feels soft after processing; Acrylic based Hydrophobing Agent has excellent processing performance, washability and low cost, acrylics based C0 water repellent are usually compounded with paraffin wax or silicone to improve the feel.

Water Repellent Agent

As the industry leader, Chevell provdie multiple grades of both non-fluorinated and fluorinated( C8, C6 ) products that provide excellent water and oil repellency to a variety of surfaces.
Through our well-developed polymer design and polymerization technology along with our comprehensive knowledge of water and oil repellency, our products excel in the marketplace!

Featured Products

Hydrophilic Silicone Oil

Block Silicone Oil

silicone antifoam

Silicone Antifoam

water repellent agent

Water & Oil Repellent

Silicone fabric softener classification

Development of silicone fabric softener

Modified silicone softeners developed in the late 1970s, many of which have been used in the finishing of fabrics, are currently being researched and developed at home and abroad. This kind of product greatly improves the hydrophilicity, washing durability, shrinkage resistance, etc. of the fabric by introducing various reactive groups such as amino group, epoxy group, polyether, hydroxyl group and the like on the side chain of the siloxane. The group gives the fabric a different style. At present, new products that are being researched and competing at home and abroad are generally divided into three categories: reactive, including amino, epoxy, carboxyl, methacryl and fluoroalkyl; non-reactive, mainly simple Polyether modification; mixed type, such as polyether amino and epoxy modified. The most widely used in textiles is polyether modification, while silicone fabric softener are more modified with amino groups. Most of the products are mixed modified, including a small amount of simple amino group, epoxy group, carboxyl group and fluoroalkyl group. Sex. The functional groups and application properties of several modified silicone softeners are shown in the table below.

2.1 Amino-modified Silicone Softener

The amino-modified silicone softener is a polysiloxane having a side chain or an end group bearing an amino group. The amino group may be a primary ammonia, a secondary ammonia, a tertiary ammonia or an ammonium salt, or may be an aromatic ammonia. The synthesis methods are bulk polymerization and emulsion polymerization. The fabric of the amino-modified silicone softener is obviously improved in elasticity, and the combination with the fiber is very strong, and has a good washing effect, so that it has a soft, smooth and full-bodied, elastic hand, and greatly improves the mechanical mechanism of the fabric. Performance, also has a certain anti-wrinkle, anti-shrinkage effect. The organosilicon with aminoethyl and aminopropyl groups in the amino-modified silicone softener has the best effect.

Amino-modified silicone softeners are easily yellowed under the influence of heat or ultraviolet rays and are therefore not suitable for soft finishing of light-colored fabrics. Currently, such softeners are still improving. The improved method is epoxidation, amidation or secondary amination, etc., to control the degree of modification or to adopt mixed modification, or to form a stable silicone microemulsion.

2.2 Epoxy modified Silicone Softener

According to the reaction type, there are mainly three methods for epoxy-modified silicone oil: hydrosilylation reaction of hydrogen-containing silicone oil with terminal alkenyl epoxy compound; octamethylcyclotetrasiloxane (D4), substituted with epoxy group Polymerization of cyclotetrasiloxane (D4) or the like; other synthetic methods such as condensation reaction of α,ω-dihydroxy silicone oil and epichlorohydrin. The epoxy group has high activity and can crosslink with groups such as hydroxyl group, amino group and carboxyl group on the surface of the fiber to form a stable chemical bond, so that the treated fabric has a durable finishing effect. The epoxy-modified silicone-treated fabric has high stability and softness, but has poor slip and water absorption. Since epoxy is basically very reactive. Therefore, the water absorption of the fabric treated with the epoxy-modified silicone can be improved by grafting a strong water-absorbing group at the end of the epoxy group.

2.3 Polyether modified Silicone Softener

The preparation of the polyether modified silicone softener can be carried out according to the mechanisms of hydrosilylation reaction, esterification reaction, Michael addition reaction, active hydrogen epoxy addition reaction, alcohol hydrogen condensation and siloxane hydrolysis condensation reaction. Technology is maturing. Because of their good suitability, biocompatibility and low glass transition temperature, these polymers have advantages that other surfactants cannot match. The introduction of a water-soluble unsaturated polyether on the side chain of the polysiloxane allows the hydrophobic silicone to be converted into a hydrophilic silicone. The fabric finished by the polyether modified silicone also has good anti-staining and antistatic properties, but the softness and the washing durability are poor. Because of its good compatibility with other finishing agents, it can also be used in the same bath as dyeing. Polyether-epoxy hybrid modified silicone combines the advantages of polyether and epoxy silicone, and at the same time makes up for their respective shortcomings. It is a multifunctional multi-component silicone finishing agent with excellent comprehensive performance.

2.4 Other modified silicone softener

2.4.1 Carboxyl modified silicone softener

In the presence of a platinum catalyst, a carboxyl group-modified silicone can be obtained by an addition reaction of an unsaturated fatty acid with a Si—H bond in a silicone. Carboxyl-modified silicone softeners are chemically reactive and polar, and can be used in natural fiber finishing to bond well with fibers and improve the antistatic and hygroscopic properties of chemical fibers. When used in combination with an amino group or an epoxy-modified silicone, it can improve the soft hand and is not easily peeled off during washing.

2.4.2 Sulfhydryl modified silicone softener

A mercapto-modified silicone can be obtained by a thiourea method or an acetic acid method. Finishing the wool with it gives the wool a durable shrink-proof and lubricity.

2.4.3 Alcohol modified silicone softener

An alcohol-modified silicone can be obtained by polar addition of an unsaturated alcohol to a Si-H bond in a silicone oil or by introducing a hydroxyl group. Such softeners improve the dyeability, heat resistance and water resistance of the fabric.

2.4.4 Ester-modified silicone softener

The ester-modified silicone softener was synthesized by emulsion polymerization using hydrogen-containing silicone oil and acrylate under the action of water-soluble catalyst. The softening agent can make the fabric soft and smooth, and has good elasticity, and is suitable for soft finishing of chemical fiber and its blended fabric with cotton.

Featured Products

Hydrophilic Silicone Oil

Block Silicone Oil

silicone antifoam

Silicone Antifoam

water repellent agent

Water & Oil Repellent

Silicone Softener Classification

Silicone Based Fabric Softener Classification and application

Softener that can adsorb on the surface of textile fibers and smooth the surface of the fibers to change the feel and make the product more comfortable. Among the various auxiliaries of textiles, the variety and dosage of softeners are the first, and Silicone Based Fabric Softener are a kind of softener with superior performance, outstanding effect and wide application. These softeners are emulsions or microemulsions of polysiloxanes and their derivatives, which not only give the fabric a good softness and smoothness, but also impart gloss, abrasion resistance, elasticity, antifouling and wrinkle resistance to the surface of the nonwoven fabric. The non-woven fabric has a slippery style, and this kind of material is non-toxic, does not pollute the environment, and has low cost. It has been widely used in various industries. Silicone Softener products have been developed to date, and can be classified into three types: inactive, active and reactive group modification according to the chemical reactivity and fiber reactivity of the active silicone silicone emulsion.

1. Classification and performance characteristics of Silicone Softener

Silicone Softener

1.1 Inactive Silicone Softener

Such softeners are mainly dimethyl silicone oils, called polydimethylsiloxane (DMPS), referred to as methyl silicone oil. It can impart good softness and heat resistance to fabrics, and its emulsion products include Dow Corning 36, 37 and the like. Because the degree of polymerization is not high, it can not crosslink itself, and does not react to the fiber. The texture, fastness and elasticity of the finished fabric are not ideal, so it can not be directly used as a softener, and must be prepared under the action of an emulsifier. Silicone oil emulsion can be applied to fabrics to increase washfastness, such as DIC Silicon softener 500 from Japan and Perlie SI from Bayer. Such softeners are known as first generation silicone softeners.

1.2 Active Silicone Softener

Such softeners mainly replace the two ends of the dimethyl polysiloxane (DMPS) linear structure with a hydroxyl group (-OH) or a hydroxyl group to make it hydrophilic. An emulsion made of such a terminal hydroxyl-terminated dimethylpolysiloxane, a so-called silicone hydroxy emulsion. There are quite a variety of such products, which can be used as a softener alone, or can be cross-linked with other silicones to form a water-insoluble molecular film on the fibers, so the finished fabric has a certain waterproof and washable. The results are Dow Corning 1111, Ultratex FSA from Ciba Geigy, Switzerland. Such softeners are second generation silicone softeners. According to the different surfactants used in the preparation, it can be divided into several types of cationic, anionic, nonionic and complex ions. It can be selected according to the type of fabric.

1.3 Modified Silicone Softener

These softeners introduce other reactive groups on the silicone molecular chain, which have special functions to meet the needs of high-grade finishing of various fabrics, improve the antistatic, oil and hydrophilic properties of the fabric, and make the chemical fiber fabric have Many advantages of natural fabrics have become a third-generation silicone soft finishing agent with special functions.

Featured Products

Hydrophilic Silicone Oil

Block Silicone Oil

silicone antifoam

Silicone Antifoam

water repellent agent

Water & Oil Repellent

Go to Top