Silane Coupling Agent A-187 (γ-Glycidoxypropyltrimethoxysilane)
CAS Number: 2530-83-8
Silane Coupling Agent A-187 (KH-560, GPTMS) is an epoxy-functional silane that acts as a molecular bridge between organic adhesive/coating matrices and inorganic substrates such as glass, metals, and minerals. It significantly improves adhesion, wet durability, and hydrolytic stability in epoxy adhesives, sealants, and composite systems by forming covalent bonds with both the resin and the substrate. A-187 is a standard adhesion promoter in epoxy, polyurethane, and acrylic adhesive formulations.
Technical Specifications
| purity | ≥97% |
| density | 1.07 g/cm³ |
| appearance | Colorless to pale yellow liquid |
| hydrolysis | Readily hydrolyzes to form silanol |
| refractiveIndex | 1.426–1.430 |
Applications
- Adhesion promoter in epoxy adhesives and coatings
- Glass fiber and mineral filler surface treatment
- Primer for metal and glass bonding
- Sealant adhesion to concrete and masonry
- Composite interphase improvement
Key Features
- Bi-functional—bonds to both organic resin and inorganic substrate
- Dramatically improves wet adhesion durability
- Compatible with epoxy, polyurethane, and acrylic systems
- Effective as filler surface treatment and primer
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CAS Number
2530-83-8
Category
Adhesive / Sealant AdditivesAvailability
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