Silane Coupling Agent
Epoxy Silane
Epoxy silane is organosilane compound that contains both epoxy and alkoxy functional groups.
This unique structure allows epoxy silanes to act as adhesion promoters and coupling agents in various applications, particularly in the coatings, adhesives, and sealants industries, facilitating the bond between inorganic materials (like glass, metal, and minerals) and organic polymers (such as resins).
Properties of Epoxy Silane
- Bifunctional Nature: Epoxy group can react with organic polymers, while alkoxysilyl group can bond with inorganic materials. This dual reactivity is essential for enhancing adhesion between different materials.
- Non-yellowing Adhesion: Unlike some other organofunctional silane, epoxy silane coupling agent do not contribute to yellowing in cured products, making them particularly valuable in applications where aesthetic quality is important.
- Improved Flexibility: Epoxy silane coupler can enhance the flexibility of resin systems compared to other functional silanes, which is beneficial in various applications.
Applications of Epoxy Silane
Epoxy silane adhesion promoter are widely used to improve adhesion in
- Coatings: Epoxy silane coupling agent enhance bond strength between organic coatings and inorganic substrates like metals and glass.
- Adhesives: Epoxy silane coupler is used in formulations to improve performance of epoxy adhesives by increasing mechanical properties and moisture resistance.
- Sealants: Epoxy organofunctional silane help in achieving better adhesion in sealants used in construction and automotive applications.
- Composites: Epoxy organo silane improve compatibility between different components and to increase mechanical properties.
Product grades
Molecular structure
Typical physical properties
Chemical name: 2-(3,4-epoxycyclohexyl)ethyltrimethoxysilane
CAS No.: 3388-04-3
EINECS No.: 222-217-1
Formula: C11H22O4Si
Appearance: Colorless transparent liquid
Refractive index(n25D): 1.4430~1.4530
Purity: 98%
Application
Epoxy silane adhesion promoter is used as a finish or a size ingredient for Glass fiber/glass fabric composites
Epoxy silane is used as an additive to polyurethane resins
Epoxy silane coupler is used as a primer or additive for Sealants and adhesives
Mineral filled composites: For pretreatment of fillers and pigments or as an additive to polymer
Epoxy silane coupling agent is used as an additive and as a primer for improving adhesion to paints and coatings
Improved shelf life over aminosilanes in polyurethanes
Improved mechanical properties, such as flexural strength, tensile strength, impact strength and modulus of elasticity
Improved moisture and corrosion resistance
Improved electrical properties, for example dielectric constant, volume resistivity.
Possible Alternative
Wacker ECHTM
Dow Xiameter OFS silane Z-6043
Shin-Etsu KBM303
Momentive Silanes A186
Evonik silane Dynasylan
Molecular structure
Typical physical properties
Chemical name: 2-(3,4-epoxycyclohexyl)ethyltriethoxysilane
CAS No.: 10217-34-2
EINECS No.: N.A
Formula: C14H28O4Si
Appearance: Colorless transparent liquid
Refractive index(n25D): 1.4400~1.4500
Purity: 98%
Application
Glass fiber/glass fabric composites: As a finish or a size ingredient
Foundry resins: As an additive to polyurethane resins
Sealants and adhesives: As a primer or additive
Mineral filled composites: For pretreatment of fillers and pigments or as an additive to the polymer
Paints and coatings: As an additive and as a primer for improving adhesion to the substrate
Improved shelf life over aminosilanes in polyurethanes
Improved mechanical properties, such as flexural strength, tensile strength, impact strength and modulus of elasticity
Improved moisture and corrosion resistance
Enhances wet electrical properties of epoxy-based encapsulate and packaging materials. Improved electrical properties, for example dielectric constant, volume resistivity.
Possible Alternative
Wacker
DOWCorning
Shin-Etsu KBE303
Momentive COATOSIL 1770
Evonik
Molecular structure
Typical physical properties
Chemical name: 3-(2,3-Epoxypropoxy)propyltrimethoxysilane
CAS No.: 2530-83-8
EINECS No.： 219-784-2
Formula: C9H20O5Si
Appearance: Colorless transparent liquid
Refractive index(n25D): 1.4220～1.4320
Purity: 98%
Application
Epoxy silane adhesion promoter Improves dry and wet strength in cured composites reinforced with glass fiber rovings. Enhances wet electrical properties of epoxy-based encapsulate and packaging materials. Eliminates the need for a separate primer in polysulfide and urethane sealants.
Improves adhesion in waterbome acrylic sealants and in urethane and epoxy coatings.
Possible Alternative
Wacker GPTM / GF80
Dow Xiameter OFS silane Z6040
Shin-Etsu KBM403
Momentive A 187 epoxy silane
Evonik silane Dynasylan GLYMO
Molecular structure
Typical physical properties
Chemical name: 3-(2,3-Epoxypropoxy)propyltrimethoxysilane
CAS No.: 2602-34-8
EINECS No.: 220-011-6
Formula: C12H26O5Si
Appearance: Colorless transparent liquid
Refractive index(n25D): 1.4220~1.4320
Purity: 97%
Application
Epoxy silane adhesion promoter Improves dry and wet strength in cured composites reinforced with glass fiber rovings.
Enhances wet electrical properties of epoxy-based encapsulate and packaging materials.
Eliminates the need for a separate primer in polysulfide and urethane sealants.
Improves adhesion in waterbome acrylic sealants and in urethane and epoxy coatings.
Possible Alternative
Wacker GPTE / GF82
Dow Xiameter OFS silane Z6041
Shin-Etsu KBE403
Momentive Silanes A1871 Y15589
Evonik silane Dynasylan GLYEO
Molecular structure
Typical physical properties
Chemical name: 3-(2,3-Epoxypropoxy)propylmethyldiethoxysilane
CAS No.: 2897-60-1
EINECS No.: 220-780-8
Formula: C11H22O4Si
Appearance: Colorless transparent liquid
Refractive index(n25D): 1.4260~1.4360
Purity: 97%
Application
epoxy silane adhesion promoter Improves dry and wet strength in cured composites reinforced with glass fiber rovings.
Enhances wet electrical properties of epoxy-based encapsulate and packaging materials.
Eliminates the need for a separate primer in polysulfide and urethane sealants.
Improves adhesion in waterbome acrylic sealants and in urethane and epoxy coatings.
Possible Alternative
Wacker GPDE GF84
Dow Xiameter OFS silane Z6042
Shin-Etsu KBE402
Momentive Silanes Wetlink78 COATOSIL2287
Evonik Silane Dynasylan
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