is dimethylene or trimethylene, R' is a C8 -C18 alkyl or alkenyl group, and A is...http://www.google.com/patents/US4780339?utm_source=gb-gplus-sharePatent US4780339 - Sized glass fibers and method for production thereofAdvanced Patent SearchPublication numberUS4780339 APublication typeGrantApplication numberUS 07/133,223Publication dateOct 25, 1988Filing dateDec 8, 1987Priority dateJul 30, 1986Fe