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1. (WO2017151721) EPOXY RESIN COMPOSITION COMPRISING CARBON FIBER SIZED WITH A BLOCK COPOLYMER OF ETHYLENE OXIDE AND PROPYLENE OXIDE

Pub. No.:    WO/2017/151721    International Application No.:    PCT/US2017/020122
Publication Date: Sat Sep 09 01:59:59 CEST 2017 International Filing Date: Thu Mar 02 00:59:59 CET 2017
IPC: C08J 5/06
Applicants: DOW GLOBAL TECHNOLOGIES LLC
Inventors: BANK, David H.
BAUMER, Richard
BOUCK, Kevin J.
CAI, Jun
LANGHORST, Marsha L.
REESE, Jason A.
WANG, Weijun
YU, Wanglin
Title: EPOXY RESIN COMPOSITION COMPRISING CARBON FIBER SIZED WITH A BLOCK COPOLYMER OF ETHYLENE OXIDE AND PROPYLENE OXIDE
Abstract:
The present invention provides epoxy resin compositions of from 30 to 50 parts by weight, as solids, of one or more epoxy resins, and from more than 50 to 70 parts by weight of sized carbon fibers treated with from 0.1 to 5 wt.%, based on the total weight of the thus sized carbon fibers, of a sizing composition of from 50 to 100 wt.%, or, preferably, from 75 to 100 wt.%, based on the total solids in the sizing composition, of a block copolymer of ethylene oxide (EO) and propylene oxide (PO). The block copolymer of ethylene oxide (EO) and propylene oxide (PO) in the sizing composition can have a weight average molecular weight of from 500 to 10,000, or, preferably, 1500 or more.