Sizing composition and sized glass fibers and process

Details Sizing composition and sized glass fibers and process Sizing composition and sized glass fibers and process

C - Chemistry, Metallurgy

03

C

117/183, 400/410

C03C 25/36 (2006.01) C03C 25/26 (2006.01)

Patent

CA 1165920

Abstract A sizing composition for use in a process of producing sized glass fiber strands that can be used in reinforcing polymers is provided. Also provided are the sized glass fiber strands, glass fiber reinforced polymers and processes for producing these materials. The sizing composi- tion comprises one or more organo silane coupling agents, a major amount of the solids of the aqueous sizing composition is an epoidized polar thermo- plastic copolymer where there are three to about twelve parts of epoxy per 100 parts of the other comonomer and one or more nonionic, cationic or anionic lubricants. The sizing composition can also have one or more compatibilizing agents such as a polyvinyl-acetate-ethylene copolymer unsaturated polyester resins, polyvinylacetate homopolymer, epoxy polymers and epoxy polyester copolymers. The comonomers for the epoxidized polar thermoplastic copolymer are vinyl acetate, acrylates, polyurethane condensate monomer, polyester condensate monomer, and polyamide condensate monomer. The epoxidized polar thermoplastic copolymer has a Tg in the range of ambient temperatures to about 70°C. The glass fiber strands treated with this sizing composition can be made into roving for use in producing glass fiber reinforced polymers like polyester polymers, vinyl ester polymers and epoxy polymers.

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