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

Evonik Dynasylan M2-A2 Diacetoxydimethylsilane

Evonik Dynasylan M2-A2 Diacetoxydimethylsilane is a bifunctional silane coupling agent from Evonik’s Dynasylan® series. It enhances adhesion between organic polymers and inorganic substrates like glass, metals, or minerals. Widely used in sealants, adhesives, and coatings, it improves mechanical strength, moisture resistance, and shelf life through hydrolyzable acetoxy groups and reactive methyl functionality.
  • evonik dynasylan m2 a2 diacetoxydimethylsilane_eb7bb98f
  • evonik dynasylan m2 a2 diacetoxydimethylsilane_eb7bb98f

Features Of Evonik Dynasylan M2-A2 Diacetoxydimethylsilane

  1. Highly reactive diacetoxy silane offering rapid hydrolysis and condensation under mild conditions.

  2. Excellent compatibility with organic polymers, resins, and fillers in solvent-based and high-solids formulations.

  3. Acts as an effective coupling agent to enhance interfacial adhesion between inorganic substrates (e.g., glass, silica, metals) and organic matrices.

  4. Low volatility and favorable handling characteristics compared to chlorosilanes, supporting safer industrial processing.

  5. Enables improved mechanical properties—including tensile strength, flexural modulus, and moisture resistance—in reinforced composites.

Typical Applications Of Evonik Dynasylan M2-A2 Diacetoxydimethylsilane

  1. Surface modification of silica, glass fibers, and mineral fillers for rubber and thermoplastic composites.

  2. Adhesion promoter in sealants, caulks, and silicone-modified construction adhesives.

  3. Coupling agent in foundry core binders and refractory coatings for enhanced green strength and thermal stability.

  4. Functional additive in UV-curable acrylate systems to improve substrate wetting and crosslink density.

  5. Moisture scavenger and crosslinker in one-component moisture-curing polyurethane and polysulfide formulations.

Specifications Of Evonik Dynasylan M2-A2 Diacetoxydimethylsilane

Chemical TypeDiacetoxydimethylsilane
Product FormLiquid
AppearanceColorless to pale yellow clear liquid
Primary ApplicationsCoupling agent, adhesion promoter, moisture scavenger, surface modifier
Key FeaturesReactive acetoxy functionality, hydrolyzable, organofunctional silane
BenefitsImproved filler dispersion, enhanced composite durability, reduced interfacial failure
Storage ConditionsStore in tightly closed containers under dry, inert atmosphere at 5–25 °C
Shelf Life12 months from date of manufacture when stored properly


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