Silane Coupling Agents

KH-580

CAS 3388-04-3

KH-580 (3-Mercaptopropyltriethoxysilane, CAS 3388-04-3) is a thiol-functional silane coupling agent used in sulfur vulcanization rubber compounds, precious metal adhesion systems, and corrosion-inhibiting coatings. Its free thiol group participates in radical and ionic sulfur crosslinking reactions.

KH-792

CAS 1760-24-3

KH-792 (N-(β-Aminoethyl)-γ-aminopropyltrimethoxysilane, CAS 1760-24-3) is a diamine-functional silane coupling agent with higher epoxy reactivity than KH-550. It is preferred for high-crosslink-density structural adhesives, primer systems, and glass fiber sizing applications demanding superior adhesion.

A-171 (Vinyltrimethoxysilane)

CAS 2768-02-7

A-171 (Vinyltrimethoxysilane, CAS 2768-02-7) is a vinyl-functional silane used primarily for moisture-cure crosslinking of polyolefins (XLPE cable insulation, silane-grafted polyethylene) and as a coupling agent for mineral-filled polyolefin compounds. It is the most cost-effective silane for wire and cable applications.

Si-69 (Bis-TESPT)

CAS 40372-72-3

Si-69 (Bis[3-(triethoxysilyl)propyl] tetrasulfide, TESPT, CAS 40372-72-3) is the primary bifunctional polysulfide silane coupling agent used in green tire tread compounding. It reduces rolling resistance, improves wet grip, and enables silica reinforcement in high-performance tire formulations.

Si-75 (Bis-TESPD)

CAS 211519-85-6

Si-75 (Bis[3-(triethoxysilyl)propyl] disulfide, TESPD, CAS 211519-85-6) is a disulfide analog of Si-69 that offers lower scorch risk and better processing safety in high-temperature mixing cycles. It is increasingly preferred in passenger car tire compounds processed at elevated dump temperatures.

Silane for Glass Fiber

Silane coupling agents applied in glass fiber sizing formulations create covalent bridges between glass surfaces and polymer matrices, significantly improving dry and wet mechanical strength retention in GRP, GFRP, and FRP composites.

Silane for Tire & Rubber

Polysulfide and mercapto silane coupling agents enable silica reinforcement in tire treads and industrial rubber goods, delivering the wet grip, rolling resistance, and durability performance required by modern green tire standards.

Silane for Coatings

Silane coupling agents added at 0.1–1.0 wt% in protective coatings and adhesion promoter formulations bridge the polar inorganic substrate to organic binder systems, dramatically improving adhesion, salt spray resistance, and wet adhesion retention.

Silane for Adhesives & Sealants

Silane coupling agents and adhesion promoters in structural adhesives and sealants create reactive bonds to glass, metal, concrete, and plastic substrates, eliminating surface primers in many bonded-glass construction and automotive glazing applications.

Silane for Mineral Fillers

Surface treatment of mineral fillers such as kaolin, CaCO₃, talc, ATH, and MDH with silane coupling agents improves filler-polymer compatibility, enables higher loading, and enhances mechanical properties in thermoplastic and thermoset compounds.

Silane for Electronics Encapsulation

Epoxy and amino silane coupling agents are critical performance additives in semiconductor encapsulants, underfill resins, LED potting compounds, and printed circuit board laminates, ensuring reliable adhesion and moisture resistance under thermal cycling conditions.

KH-550 vs KH-792

KH-550 (monoamine, ethoxy) and KH-792 (diamine, methoxy) are the two primary amino silane coupling agents. This comparison covers functional group differences, resin compatibility, processing implications, and selection criteria for each.

KH-560 vs KH-570

KH-560 (epoxy silane) and KH-570 (methacrylate silane) are both methoxy-functional silanes used in glass fiber sizing, but they target fundamentally different polymer matrices. This guide explains when to specify each and the consequences of mixing them up.

Silane vs Titanate Coupling Agents

Silane and titanate coupling agents both treat inorganic fillers and substrates, but they differ fundamentally in chemistry, substrate compatibility, and cost. This guide helps formulators choose between them for polymer composites, coatings, and filler treatment.

Dow Z-6020 Equivalent Silanes

Dow Z-6020 is the trade name for N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane (CAS 1760-24-3), equivalent to KH-792, Momentive A-1120, and Shin-Etsu KBM-603. This page guides buyers to qualified Chinese-origin equivalents at competitive pricing.

Silane Coupling Agent Buyer Guide

A practical guide for industrial buyers sourcing silane coupling agents from Chinese suppliers. Covers grade selection, purity verification, packaging, MOQ, and how to evaluate suppliers by certificate and quality system.

Silane Selection Guide

A systematic guide for selecting the correct silane coupling agent based on substrate type, polymer matrix, application method, and processing conditions. Covers all major functional types with specific grade recommendations.