End-capped unsaturated polyetherester, unsaturated polyester and vinyl monomer
AssigneeCook Composites and Polymers Co.
InventorsChih-Pin Hsu, Ming Yang Zhao, Linda Bergstrom
Life of this patent
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Abstract
A compositon useful as an intermediate for a skin laminate and a fiber-reinforced composite comprises: (A) At least 5 wt. % of an at least partially end-capped unsaturated polyetherester wherein the end-capping compound includes a compound having at least one epoxy group; (B) an unsaturated polyester resin such that the weight ratio unsaturated polyester resin (B):polyetherester resin (A) is from about 10:90 to about 90:10; (C) from about 10 to about 70 wt. % of at least one vinyl monomer such as styrene; and (D) a curing agent such as a free radical initiator and an accelerator.
Claims13
A curable thermoset resin composition useful for imparting water and/or solvent resistance to gel coated fiber-reinforced polymers comprising:
- (A) At least 5 wt. % of an at least partially end-capped unsaturated polyetherester resin obtained by (1) reacting at least one polyether, the polyether selected from the group consisiting of polyether polyols, alkylene oxide-alkylene oxide copolymers, wherein the alkylene group of each alkylene oxide is different, and combinations thereof, and at least one ethylenically unsaturated anhydride or dicarboxylic acid in the presence of at least one catalyst effective to promote insertion of the anhydride or dicarboxylic acid into carbon-oxygen bonds of the polyether to produce unsaturated polyetherester resin polymer chains and (2) reacting the unsaturated polyetherester resin polymer chains with at least one end-capping compound to form the at least partially end-capped polyetherester resin, wherein the at least one end-capping compound comprises at least one compound having at least one epoxy group;
- (B) an unsaturated polyester resin having a ratio of the number average molecular weight to the average number of double bonds per polymer molecule in the range from about 200 to about 400, in an amount such that the weight ratio of polyester resin (B) to polyetherester resin (A) is in the range from about 10:90 to about 90:10;
- (C) about 10 to about 70 wt. % of at least one vinyl monomer;
- and
- (D) a curing agent.
A method for making a curable thermoset resin composition comprising combining:
- (A) At least 5 wt. % of an at least partially end-capped unsaturated polyetherester resin obtained by (1) reacting at least one polyether, the polyether selected from the group consisiting of polyether polyols, alkylene oxide-alkylene oxide copolymers wherein the alkylene group of each alkylene oxide is different, and combinations thereof, and at least one ethylenically unsaturated anhydride or dicarboxylic acid in the presence of at least one catalyst effective to promote insertion of the anhydride or dicarboxylic acid into carbon-oxygen bonds of the polyether to produce unsaturated polyetherester resin polymer chains and (2) reacting the unsaturated polyetherester resin polymer chains with at least one end-capping compound to form the at least partially end-capped polyetherester resin, wherein the at least one end-capping compound comprises at least one compound having at least one epoxy group;
- (B) An unsaturated polyester resin having a ratio of the number average molecular weight to the average number of double bonds per polymer molecule in the range from about 200 to about 400, in an amount such that the weight ratio of polyester resin (B) to polyetherester resin (A) is in the range from about 10:90 to about 90:10;
- (C) About 10 to about 70 wt. % of at least one vinyl monomer;
- and
- (D) A curing agent.
Dependencies are inferred from the claim text.