Patent GB-760798-A (GB)
Title: Synthetic resin compositions for coating glass fibers
IPC: C03C25/26
Filed: 1953-02-16
Abstract: A composition for sizing glass fibres comprises (1) an hydrolyzate of a vinyl alkoxysilane containing at least 2 alkoxy groups, the other silicon-bonded radicals being vinyl radicals, and (2) an aqueous emulsion or solution of a thermoplastic film-forming resin polymer. The hydrolysate is a true water solution of the silane prepared in accordance with Specification 745,374.  Ingredient (2) is a stable dispersion which may be made by physically dispersing the selected monomer in water under controlled pH conditions and effecting polymerization in the presence of suitable catalysts.  Homo-, co- or hetero-polymers of acrylate, or methacrylate, such as ethyl-acrylate, ethyl-methacrylate, methyl-methacrylate and butyl-methacrylate, styrene, vinyl acetate, vinyl chloride, vinylidene chloride, vinyl pyridine and butadiene are specified.  The compositions may also contain a cationic type lubricating agent such as the condensation product of a mono- or di-basic fatty acid and a polyethylene amine that has been solubilised with an organic acid such as acetic, methacrylic or acrylic acid.  In examples, a water solution of vinyl triethoxysilane was added to (1) an emulsion of polyvinyl acetate and (2) tetra-ethylene pentamine amide of stearic acid solubilised with methacrylic acid, if necessary with subsequent adjustment of the pH to 4.5 with formic acid; (3) an emulsion of polyethyl acrylate and triethylene tetramine amide of palmitic acid solubilised with acrylic acid; (4) an aqueous solution of polyvinylpyridine solubilised with acrylic acid.  The sized fibres are used in making unsaturated polyester resin laminates.ALSO:Glass fibres are sized by coating them with a composition comprising (1) a hydrolysate of a vinyl alkoxy silane containing at least 2 alkoxy groups, the other silicon - bonded radicals being vinyl radicals, and (2) an aqueous emulsion or solution of a thermoplastic film - forming resin polymer.  The hydrolysate is a true water solution of the silane prepared according to Specification 745,374.  Ingredient (2) is a stable dispersion which may be made by dispersing the selected monomer in water under controlled pH conditions and effecting polymerization in the presence of suitable catalysts.  Homo -, co - or hetero - polymers of acrylates or methacrylates, e.g. ethyl acrylate, ethyl methacrylate, methyl methacrylate and butyl methacrylate, styrene, vinyl acetate, vinyl chloride, vinylidene chloride, vinyl pyridine and butadiene are specified.  The compositions may also contain a cationic type lubricating agent such as the condensation product of a mono - or di - basic fatty acid and a polyethylene amine that has been solubilised with an organic acid such as acetic, methacrylic or acrylic acid.  In examples a water solution of vinyl triethoxysilane is added to (1) an emulsion of polyvinyl acetate and (2) tetra - ethylene pentamine amide of stearic acid solubilised with methacrylic acid, if necessary with subsequent adjustment of the pH to 4.5 with formic acid; (3) an emulsion of polyethyl acrylate and triethylene tetramine amide of palmitic acid solubilised with acrylic acid; (4) an aqueous solution of polyvinylpyridine solubilised with acrylic acid.