GLASS FIBER SIZE AND IMPREGNANT COMPOSITIONS

摘要

A coating size composition for glass fiber includes an aqueous solution of a resin formed of a copolymer of the hydrolysis product of a vinyl aromatic monomer and maleic anhydride, and an organo silane glass fiber anchoring agent. Particularly favorable tensile loss properties are achieved if a second impregnant coating is applied to the sized glass fiber whereby the impregnant coating is formed by removing water from an aqueous solution of a vinylpyridine terpolymer, a blend of emulsifiable mineral oils, silica derivatives and esters, a resorcinol-formaldehyde resin, a polybutadiene latex and a wax emulsion, and wherein the vinylpyridine terpolymer and the butadiene latex are each emulsified with a synthetic anionic surfactant having a sulfate, sulfonate or sulfosuccinate group.