Sizing agents for carbon yarns

Details Sizing agents for carbon yarns Sizing agents for carbon yarns

1986-06-06

1988-06-14

Ivy, C. Warren

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

523426, 523455, 523456, 428367, 252 89, C08K 506, C08K 510, C08L 6300

Patent

active

047512580

ABSTRACT:
A sizing agent for carbon fibers comprises a water-based dispersion of a mixture of constituents A, B, C and D to be described below at weight ratios of (constituent A)/(constituents B+C)=60/40 to 90/10, (constituent B/constituent C)=2/1 to 7/1, and (constituents A+B+C)/(constituent D)=85/15 to 97/3 where the constituent A is phenyl epoxy resin or aromatic nitrogen-containing epoxy resin, the constituent B is shown by the following expression (I): ##STR1## where X is a benzene residue or a diphenyl residue, n is an integer in the range of 1 to 5, Y is ##STR2## where q is an integer in the range of 4 to 50, p is 0 or an integer in the range of 1 to 5, l and m are such that 1/2.ltoreq.m/l.ltoreq.1/4, the constituent C is polyolyethylene alkylphenylether shown by the following expression (II): ##STR3## where R is an alkyl group with 8 to 9 carbon atoms and a is an integer in the range of 4 to 8, and the constituent D is aliphatic monovalent alcohol ester of oleic acid and/or monovalent aliphatic acid ester of oleyl alcohol.

REFERENCES:
patent: 4107128 (1978-08-01), Hosoi
patent: 4219457 (1980-08-01), Taniguchi
patent: 4420512 (1983-12-01), Ogawa

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