Guangzhou Eric Wei Chemical Co., Ltd.
Guangzhou Eric Wei Chemical Co., Ltd.

Momentive Silquest A-186 Beta-(3,4-Epoxycyclohexyl)Ethyltrimethoxysilane

Momentive Silquest A-186 is a beta-(3,4-epoxycyclohexyl)ethyltrimethoxysilane coupling agent. It enhances adhesion between organic polymers and inorganic substrates like glass, metals, or fillers. Widely used in epoxy, silicone, and UV-curable systems for improved mechanical strength, moisture resistance, and interfacial bonding. Offers excellent thermal stability and shelf life.
  • momentive silquest a 186 beta 3 4 epoxycyclohexyl ethyltrimethoxysilane_ddc590b6
  • momentive silquest a 186 beta 3 4 epoxycyclohexyl ethyltrimethoxysilane_ddc590b6

Features Of Momentive Silquest A-186 Beta-(3,4-Epoxycyclohexyl)Ethyltrimethoxysilane

  1. Bifunctional silane coupling agent combining a highly reactive epoxycyclohexyl group with hydrolyzable methoxy groups.

  2. Enables strong covalent bonding between organic polymers and inorganic substrates such as glass, metals, and mineral fillers.

  3. Offers enhanced thermal stability and hydrolytic resistance compared to standard glycidoxy silanes due to the alicyclic epoxy structure.

  4. Improves composite mechanical properties—including flexural strength, interlaminar shear, and moisture resistance—when used in thermoset resins.

  5. Compatible with epoxy, phenolic, polyester, and vinyl ester resin systems for surface treatment and bulk modification.

Typical Applications Of Momentive Silquest A-186 Beta-(3,4-Epoxycyclohexyl)Ethyltrimethoxysilane

  1. Fiber-reinforced polymer (FRP) composites for aerospace and wind energy blade manufacturing.

  2. Surface treatment of silica, alumina, and calcium carbonate fillers in high-performance epoxy molding compounds.

  3. Adhesion promotion in structural adhesives and encapsulants for electronics and automotive power modules.

  4. Reinforcement of glass fiber rovings and mats in prepregs and pultrusion resins.

  5. Moisture-resistant coatings and primers for metal and concrete substrates in protective industrial systems.

Specifications Of Momentive Silquest A-186 Beta-(3,4-Epoxycyclohexyl)Ethyltrimethoxysilane

Chemical TypeEpoxy-functional alkoxysilane
Product FormLiquid
AppearanceColorless to pale yellow clear liquid
Primary ApplicationsCoupling agent for composites, filler treatment, adhesion promotion
Key FeaturesBifunctional, hydrolyzable, thermally stable alicyclic epoxy
BenefitsImproved interfacial adhesion, moisture resistance, and composite durability
Storage ConditionsStore in tightly closed containers under dry, inert atmosphere at 15–25°C
Shelf Life12 months from date of manufacture when stored properly


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