CHEMICAL TREATING COMPOSITION FOR GLASS FIBERS HAVING EMULSIFIED EPOXY WITH GOOD STABILITY AND THE TREATED GLASS FIBERS

摘要

A simplified aqueous sizing composition utilizing a variety of componentsachieves improved stability, wettability andstrength characteristics. The composition utilizes one or more aqueous,soluble, dispersible or emulsifiable bisphenol A typepolyester film forming polymers with an epoxy containing film formingcopolymer compatible with and soluble in the matrixpolymer. One or more organo-silane coupling agents are also utilized. Thesizing composition preferably includes a single nonionicsurfactant in conjunction with a cationic amidated polyamine lubricant. One ormore anti-static agents, generally cationic organicquaternary ammonium salts having one or more alkoxy moieties, are utilized inan effective anti-static amount. An anti-foamingagent may also be utilized for the prevention or suppression of foam duringthe mixing process. The improved stability andwettability characteristics of the aqueous sizing composition are preferablyachieve through the use of a single epoxidized surfactant.Compositions formed from this surfactant are effective at one-half thesurfactant level and retain their static emulsion stabilityfor 48 hours or more. This is accompanied by a 50 percent improvement in drysliver abrasion with no apparent negative effectson the mechanical properties of the resultant glass fiber. Figure shows theparticle size of four sizing compositions each with adifferent epoxy emulsion having a given amount of the surfactant.