초록 ▼

Sized glass fibers are provided that enables the production of sized glass fibers having improved filamentization. When these sized glass fibers are used for reinforcing polymeric materials the reinforced polymeric materials having good mechanical properties such as tensile strength and compaction w

Sized glass fibers are provided that enables the production of sized glass fibers having improved filamentization. When these sized glass fibers are used for reinforcing polymeric materials the reinforced polymeric materials having good mechanical properties such as tensile strength and compaction without fuzz, fly or static properties of the strands. The reinforced polymeric materials and other improvements of the present invention eminate from the use of an interaction product of an epoxidized polar thermoplastic copolymer and an amino organo silane coupling agent in an aqueous sizing composition that also contains a predominant amount of a cross-linkable film former. The aqueous sizing composition has one or more cross-linkable film formers, one or more organo silane coupling agents and about 2 to about 12 weight percent of an interaction product of an unhydrolyzed or partially hydrolyzed amino organo silane coupling agent and an epoxidized polar thermoplastic copolymer. The epoxy copolymer has about 2 to about 12 parts of monomer with epoxy functionality per 100 parts of copolymer. Also the epoxy copolymer has a glass transition temperature (Tg) of from -10°C. to about 70°C. The unhydrolyzed or partially hydrolyzed amino silane coupling agent is contacted with the epoxidized copolymer, where the copolymer has a percent solids in the range of about 15 to about 60 weight percent. The sizing composition can also have additional additives like lubricants, plasticizers, emulsifiers, urea formaldehyde condensates and the like. The method of producing the aqueous sizing composition involves having at least one organo silane coupling agent which is an amino organo silane coupling agent which is split for addition so that a predominant amount in an unhydrolyzed form is added to the cross-linkable film former and the remaining amount of the unhydrolyzed or partially hydrolyzed amino organo silane coupling agent is added to the epoxidized copolymer. The aqueous sizing composition is applied to glass fibers during their formation, and the sized glass fibers are gathered into strands and dried at a temperature of above 100°C. for about 4 hours. A plurality of the dried, sized glass fiber strands are gathered dried and collected for use in various forms such as chopped strands, continuous strands, mats and the like for reinforcing polymeric materials.

대표청구항 ▼

Reinforced polymeric materials selected from sheet molding compounds, bulk molding compounds and thick molding compounds having as reinforcement glass fiber strands where the glass fibers have the dried residue of an aqueous sizing composition for use in reinforcing polymeric materials, wherein the

Reinforced polymeric materials selected from sheet molding compounds, bulk molding compounds and thick molding compounds having as reinforcement glass fiber strands where the glass fibers have the dried residue of an aqueous sizing composition for use in reinforcing polymeric materials, wherein the aqueous sizing composition comprises: (a) a major amount of the solids of the sizing composition being one or more cross-linkable film forming polymers compatible with the polymeric matrix to be reinforced with glass fibers, (b) one or more organo-silane coupling agents in an amount up to about 20 weight percent of the solids of the sizing composition, (c) an interaction product of an epoxidized polar thermoplastic copolymer and an unhydrolyzed or partially hydrolyzed amino-containing organo-silane coupling agent in an amount of about 10 weight percent up to about 50 weight percent of the solids of the sizing composition, wherein the interaction product is formed by contacting the epoxidized copolymer which has about 2 to about 12 parts of epoxidized monomer per 100 parts of copolymer and which has a glass transition temperature from about -10°C. to about 70°C. with the amino-containing organo-silane coupling agent wherein the amount of the amino silane coupling agent is in the range of about 0.1 to about 1.2 weight percent of an aqueous mixture having at least 20 weight percent of the epoxidized copolymer, and (d) 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.