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:
Jul. 06, 1982
Filed:
Jun. 15, 1981
Balbhadra Das, Allison Park, PA (US);
L Dow Moore, Allison Park, PA (US);
PPG Industries, Inc., Pittsburgh, PA (US);
Abstract
An aqueous sizing composition, method of preparing same and sized glass fibers are provided that enables the production of sized glass fibers having improved filamentization. The aqueous sizing composition has one or more cross-linkable film formers, one or more organo silane coupling agents and about 2 to about 12 weight percent of an interaction product of an unhydrolyzed or partially hydrolyzed amino organo silane coupling agent and an epoxidized polar thermoplastic copolymer. The epoxy copolymer has about 2 to about 12 parts of monomer with epoxy functionality per 100 parts of copolymer. Also the epoxy copolymer has a glass transition temperature (Tg) of from -10.degree. C. to about 70.degree. C. The unhydrolyzed or partially hydrolyzed amino silane coupling agent is contacted with the epoxidized copolymer, where the copolymer has a percent solids in the range of about 15 to about 60 weight percent. The method of producing the aqueous sizing composition involves having at least one organo silane coupling agent which is an amino organo silane coupling agent which is split for addition so that a predominant amount in an unhydrolyzed or partially hydrolyzed form is added to the cross-linkable film former and the remaining amount of the unhydrolyzed or partially hydrolyzed amino organo silane coupling agent is added to the epoxidized copolymer. The aqueous sizing composition is applied to glass fibers during their formation, and the sized glass fibers are gathered into strands and dried at a temperature at above 100.degree. C. for about 4 hours.