초록 ▼

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 composition comprises one or

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 composition comprises one or more organo silane coupling agents, a major amount of the solids of the aqueous sizing composition is an epoxidized polar thermoplastic 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.

대표청구항 ▼

An aqueous sizing composition for glass fibers that is substantially soluble in polymeric materials the glass fibers are to reinforce, comprising: (a) a predominant amount of the solids of the composition being an epoxidized polar thermoplastic copolymer having 3 to about 12 parts of epoxy per 100 p

An aqueous sizing composition for glass fibers that is substantially soluble in polymeric materials the glass fibers are to reinforce, comprising: (a) a predominant amount of the solids of the composition being an epoxidized polar thermoplastic copolymer having 3 to about 12 parts of epoxy per 100 parts of copolymer, where the comonomer is selected from vinyl acetate, acrylate and polyurethane condensate monomer, and where the polymer has a Tg in the range of ambient temperatures to about 70°C.; (b) one or more compatibilizing agents selected from unsaturated polyester polymer, polyvinylacetate homopolymer or vinyl acetate-ethylene copolymer, in an amount of less than about 20 weight percent of the total amount of film former in the sizing composition; (c) one or more organo silane coupling agents; (d) one or more lubricants, (e) an amount of water sufficient to make the percent solids of the sizing composition in the range of about 2 to about 30 weight percent.