Patent ID: 6139958
Filing Date: 2000-10-31
Classification: C03C,C08J,Y10T

Abstract:
Glass fiber strand having a plurality of glass fibers, comprising:I. glass fibers having a refractive index in the range of about 1.54 to about 1.57 selected from the group consisting of 1) oxides of borosilicates, 2) aluminum borosilicates, 3) alkali metal alkaline earth metal borosilicates, and alkali metal alkaline earth metal aluminum borosilicates,II. dried residue of an aqueous chemical treating composition present on at least a portion of the surfaces of the glass fibers, comprising:a) only two film forming polymers including:i) an aqueous emulsion or dispersion of bisphenol A polyester film forming polymer and having internal emulsification through ethoxylation and having a weight average molecular weight in the range of about 30,000 to 45,000 and having a polydispersity index of around 5-9 and having an amount of aliphatic unsaturation of less than 1.5 double bonds/mole of polymer and a ratio of aliphatic to aromatic double bonds of less than 0.1, andii. aqueous emulsion, dispersion or solution of poly(vinylacetate-silane)copolymer, where the amount of organosilane in the copolymer does not exceed about 1 weight percent of the copolymer, where (i) is present in an amount of at least 40 weight percent of the nonaqueous components and (ii) is present in an amount of around 5 to around 60 weight percent of the nonaqueous components, where both nonaqueous components are of the aqueous chemical treating composition;b) organo coupling agent selected from the group consisting of acryloxy-containing and methacryloxy-containing coupling agents present in an amount in the range of about 0.5 to about 10 weight percent of the aqueous chemical treating composition,c) amino organosilane coupling agent selected from the group consisting of aminoalkyltrialkoxysilane, and polyamino organofunctional silane coupling agents present in an amount of at least 0.4 weight percent of the nonaqueous components and in a lesser amount to that of the acryloxy or methacryloxy-containing silane where all the silanes include hydrolyzed derivatives thereof,d) polyamino amide cationic lubricant which is a partially amidated polyalkylene amine prepared through condensation with fatty acids, where at least one of the fatty acids is pelargonic acid present in an amount in the range of about 0.05 to about 0.5 weight percent of the aqueous chemical treating composition,e) cationic quaternary ammonium salt having alkoxy moieties and having an acid number of at least 10 and present in an amount in the range of about 0.05 to about 0.4 weight percent of the aqueous treating composition,f) water in an amount to give a total solids of the aqueous chemical treating composition in the range of about 1 to about 20 weight percent, and wherein the aqueous chemical treating composition is essentially free of inorganic antistatic agents, and where the pH of the aqueous chemical treating composition is below about 7.