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

Momentive Silquest A-1637 Isobutyltrimethoxysilane

Momentive Silquest A-1637 Isobutyltrimethoxysilane is a reactive organosilane coupling agent from the Silquest® series. It enhances adhesion between organic polymers and inorganic substrates like glass silica or metals. Widely used in sealants coatings and composites it improves moisture resistance mechanical strength and durability through hydrolysis and condensation reactions.
  • momentive silquest a 1637 isobutyltrimethoxysilane_ae4b033b
  • momentive silquest a 1637 isobutyltrimethoxysilane_ae4b033b

Features Of Momentive Silquest A-1637 Isobutyltrimethoxysilane

  1. High hydrolytic stability due to the sterically hindered isobutyl group.

  2. Excellent coupling efficiency between inorganic substrates (e.g., glass, metals, minerals) and organic polymers.

  3. Low volatility and favorable handling characteristics compared to smaller alkyltrimethoxysilanes.

  4. Enhanced moisture resistance in cured composites and sealants.

  5. Compatible with a broad range of resin systems including epoxies, polyurethanes, and acrylics.

Typical Applications Of Momentive Silquest A-1637 Isobutyltrimethoxysilane

  1. Adhesion promoters in automotive and industrial sealants.

  2. Surface modifiers for silica, calcium carbonate, and other mineral fillers in thermoset composites.

  3. Hybrid sol-gel precursors for protective coatings and functionalized thin films.

  4. Coupling agent in glass fiber sizing formulations for reinforced plastics.

  5. Moisture-scavenging additive in moisture-cure polyurethane adhesives and elastomers.

Specifications Of Momentive Silquest A-1637 Isobutyltrimethoxysilane

Chemical TypeOrganofunctional alkoxysilane
Product FormClear, colorless to pale yellow liquid
AppearanceHomogeneous liquid, free from visible particulates
Molecular Weight220.3 g/mol
Boiling Point (760 mmHg)195–198 °C
Density at 25 °C0.945–0.955 g/cm³
Refractive Index (n20D)1.392–1.398
SolubilityMiscible with common organic solvents (e.g., alcohols, acetone, toluene); hydrolyzes in water


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