Carboxylate salts of amine compounds as sizing agents
AssigneeHexcel Corporation
InventorsMichael Yurchenko, Dale Schmidt, Gary Chang
Life of this patent
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Abstract
Provided are sizing compositions, and more particularly, sizing compositions comprising a carboxylate salt of an amine compound for the treatment of carbon fiber. The structure of the amine used to make the carboxylate salts is RnXmQ, wherein Q is an amine-containing group, X is a polyether group, and R is an aryl or alkyl group, either linear or branched, saturated or unsaturated, or a combination thereof. m and n are integers greater than or equal to 0. The compositions help improve shear strength on carbon fibers in finished goods. Carbon fiber-reinforced composite materials and carbon fibers incorporating said sizing compositions are also provided.
Claims31
A sizing composition comprising:
- a) 0-20% by weight of an epoxy-containing resin, compared to the total weight of the solids in the sizing composition;
- and
- b) a carboxylate salt of an amine, wherein the amine has the formula
- wherein:
- Q is an amine-containing group, comprising at least one primary or secondary amine;
- X is a polyether group selected from the group consisting of poly (propylene oxide) (PPO) compounds and poly (ethylene oxide) (PEO) compounds or a mix thereof;
- m is an integer, where m≥0;
- R is an aryl or alkyl group, wherein each alkyl group may be independently linear or branched, and wherein each alkyl group may independently be saturated or unsaturated;
- R contains from 0-10 heteroatoms;
- and R is either unsubstituted or substituted with 1-5 substituents selected from the group consisting of C1-C12 alkyl groups, C1-C12 heteroalkyl groups, C6-C14 aryl groups, and C6-C14 heteroaryl groups;
- and
- n is an integer, with n≥0.
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Dependencies are inferred from the claim text.