CAS 2530-83-8 Industrial 3-Glycidoxypropyltrimethoxysilane GPTMS Epoxy Silane Coupling Agent

CAS 2530-83-8 Industrial 3-Glycidoxypropyltrimethoxysilane GPTMS Epoxy Silane Coupling Agent

Description

3-Glycidoxypropyltrimethoxysilane (common trade name: GPTMS, Glymo) is a bifunctional organosilane coupling agent. It features a reactive epoxy group on one end and three hydrolyzable methoxys groups on the silicon end. This unique structure allows it to act as a molecular bridge between inorganic materials (like glass, metals, minerals) and organic polymers (especially epoxy, urethane, and acrylic resins). It improves adhesion, dispersion, and compatibility in composite systems and coatings.

Specification

Key Features & Characteristics

• Dual Functionality: The epoxy ring reacts with amines, carboxylic acids, and hydroxyl groups. The methoxysilane groups hydrolyze to form silanols that condense with inorganic surfaces (Si-OH, Al-OH, etc.).
• Excellent Coupling Agent: Dramatically improves adhesion of polymers to glass, metals, and fillers.
• Crosslinking Agent: Can be used to form organic-inorganic hybrid networks (e.g., sol-gel coatings).
• Hydrophobicity/Stability: Imparts moisture resistance and improves the durability of composites.
• Dispersion Aid: Promotes the even dispersion of fillers and pigments in polymer matrices.
• Versatile Reactivity: The epoxy group can be ring-opened under acidic, basic, or thermal conditions for further modification.

Applications

1. Adhesion Promotion:

   • Primers & Coatings: Key ingredient in primers for adhesives and hurtts on glass, aluminum, and other metals.
   • Glass Fiber Sizing: Essential coupling agent for epoxy and polyester composites reinforced with glass fibers (e.g., in automotive, marine parts).
   • Mineral-Filled Composites: Improves strength and moisture resistance in talc, silica, or clay-filled plastics.

2. Surface Modification:

   • Nanoparticle Treatment: Used to functionalize silica, titania, and other nanoparticles for better compatibility in polymer matrices.
   • Glass & Ceramic Treatment: Creates a reactive epoxy surface on glass for bonding or further chemical grafting.

3. Sol-Gel & Hybrid Materials:

   • Protective & Functional Coatings: Used to formulate hard, abrasion-resistant, and corrosion-resistant hybrid coatings.
   • Optical & Electronic Materials: Component in waveguides, anti-reflective coatings, and encapsulants due to its transparency and tunable properties.

4. Sealants & Adhesives:

   • Improves adhesion and durability of epoxy and polyurethane-based formulations, especially in humid environments.

5. Other Specialized Uses:

   • Chromatography: As a bonding phase for silica gel in HPLC columns.
   • Biomedical: For immobilizing enzymes or biomolecules on inorganic supports.

Packing

• 
  
  • 25 kg HDPE drum
  • 200 kg steel or HDPE drum (for industrial quantities)