Why It Matters
Glass-reinforced composites lose wet strength when the resin-glass interface hydrolyzes; coupling agents create a covalent, water-stable bridge at the glass surface
Solution Approach
Glass-reinforced composites lose wet strength when the resin-glass interface hydrolyzes; coupling agents create a covalent, water-stable bridge at the glass surface RawSource supplies the base chemicals that go into these programs. We can help with product selection, grade matching, and sourcing from multiple origins for supply security.
Typical Formulation Workflow
1
System & Substrate Assessment
Define the binder system (waterborne, solventborne, UV, powder), substrate, cure, and the VOC, durability, and appearance targets.
2
Additive & Resin Selection
Match resins, pigments and fillers, dispersants, rheology modifiers, defoamers, or biocides to the formulation and compatibility window.
3
Lab Let-Down & Optimization
Dial in loading and addition order through lab let-downs, checking dispersion, rheology, film properties, and storage stability.
4
Application & Performance Testing
Validate on the real application method and substrate, tracking gloss, adhesion, sag, cure, and weathering before scale-up.
Recommended Chemistries (4)
3-Methacryloxypropyltrimethoxysilane
CAS 2530-85-0
Silanes & Organosilanes
Methacrylate silane for acrylic systems
Methacrylate end copolymerizes into unsaturated polyester/acrylic resin while silanols bond to glass, locking in wet-strength retention
Boiling Point: 190 °C Density: 1.045 at 25 °C Solubility: Sol in acetone, benzene, ether, methanol, and h…
Full Details
3-glycidoxypropyltrimethoxysilane
CAS 2530-83-8
Silanes & Organosilanes
Primary epoxy silane for coatings and composites
Epoxy silane sizes glass fiber for epoxy composites, the epoxide reacting with the matrix amine/hydroxyl groups
Vapor Pressure: 0.002
Full Details
Vinyltrimethoxysilane
CAS 2768-02-7
Silanes & Organosilanes
Vinyl silane for polyethylene crosslinking
Vinyl group co-reacts with peroxide-cured/unsaturated resins; silanols couple to glass for hydrolytically stable interfaces
Melting Point: ˆ'97°C Boiling Point: 123°C at 1013 hPa (converted to 101.3 kPa) (760… Density: Specific Density: 0.94 (water = 1)
Full Details
3-aminopropyltriethoxysilane
CAS 919-30-2
Silanes & Organosilanes
Primary amino silane for coatings adhesion
General-purpose aminosilane size compatible with epoxy, phenolic, and PU matrices on glass and mineral fibers
Melting Point: -70 °C Boiling Point: 217 °C Density: 0.94 at 25 °C
Full Details
Related Product Families
● Available
Amino Silane Coupling Agents
Aminopropyl and aminoethylaminopropyl silanes for adhesion promotion between organic coatings and inorganic substrates
Adhesion PromotionCoupling
5 chemistries
View family
● Available
Epoxy Silane Coupling Agents
Glycidoxypropyl silanes for epoxy-compatible adhesion promotion and glass fiber sizing
Adhesion PromotionCrosslinking
3 chemistries
View family
● Available
Methacrylate & Vinyl Silanes
Reactive silanes for copolymerization into acrylic, polyester, and vinyl resin systems
CouplingCrosslinking
5 chemistries
View family