The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 21, 1985
Filed:
Dec. 23, 1983
Donald E McWilliams, Pittsburgh, PA (US);
Carl A Melle, Gibsonia, PA (US);
Balbhadra Das, Allison Park, PA (US);
PPG Industries, Inc., Pittsburgh, PA (US);
Abstract
Glass fiber strands are produced which have a reduced tendency for strand to strand adhesion and good dispersibility or wettability in uncured polymeric materials for the production of glass fiber reinforced plastics. The glass fibers have a dried residue of an aqueous chemical treating composition. The aqueous chemical treating composition has a film forming polymeric system, gamma methacryloxy alkyltrialkoxy silane and a glass fiber lubricant in an effective lubricating amount. The film forming polymeric system has an epoxy-containing polymer or copolymer, a non-tacky film forming polymer, and polyvinyl pyrrolidone of which are aqueous soluble, dispersible or emulsifiable. The amount of the epoxy-containing polymer or copolymer is in the range of about 50 to about 70 weight percent of the solids of the aqueous chemical treating composition while the amount of the polyvinyl pyrrolidone does not exceed 25 weight percent of the solids of the aqueous chemical treating composition and the amount of the non-tacky film forming polymer is in the range of about 5 to about 20 weight percent of the aqueous chemical treating composition.