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:
Dec. 13, 1983
Filed:
Sep. 07, 1982
Hiroyasu Ogawa, Mishima, JP;
Mikio Shima, Shizuoka, JP;
Toho Belson Co., Ltd., Tokyo, JP;
Abstract
An aqueous emulsion type sizing agent for carbon fibers is disclosed. The sizing agent contains a compound represented by the following general formula (I): ##STR1## wherein A represents (C.sub.2 H.sub.4 O).sub.l or (C.sub.2 H.sub.4 O).sub.n (C.sub.3 H.sub.6 O).sub.m [l is 18 to 70; n is 18 to 70; and m is 2 to 50 (1.ltoreq.n/m.ltoreq.35)]; a compound represented by the following general formula (II): ##STR2## wherein R represents C.sub.q H.sub.2q+1 or ##STR3## (q is 10 to 18; and p is 15 to 70); and an epoxy resin, a process for preparation of the agent, and the method for using it are also disclosed. The sizing agent has excellent emulsion stability and heat stability, and it can impart excellent bundling properties to carbon fibers.