Treatment method for imparting high impact resistance in certain cbdo copolymers
AssigneeTexas State University—San Marcos
InventorsGary W. Beall, Jesse R. Hancock, Chad J. Booth
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Abstract
According to the invention, an amorphous CBDO copolymer (as described in U.S. Pat. No. 5,705,575, issued Jan. 6, 1998, which U.S. patent is incorporated herein by reference in its entirety) is treated to impart high impact resistance, also called impact strength.
Claims10
A method for treating an amorphous CBDO copolymer containing an effective amount of cis isomer comprising heating said copolymer to a temperature above its glass transition temperature and then cooling it to a temperature below its glass transition temperature at a cooling rate fast enough to impart a high impact strength.
A method for treating an amorphous CBDO copolymer containing an effective amount of cis isomer comprising heating said copolymer to a temperature above its glass transition temperature and then cooling it to a temperature below its glass transition temperature by quenching it in an ice water bath.
A method for treating an amorphous CBDO copolymer containing an effective amount of cis isomer comprising heating said copolymer to a temperature above its glass transition temperature and then cooling it to a temperature below its glass transition temperature at a rate enough greater than about 0.5° C. per minute to impart a high impact strength.
A method for treating an amorphous CBDO copolymer comprising heating said copolymer to a temperature above its glass transition temperature and then cooling it to a temperature below its glass transition temperature at a cooling rate fast enough to impart a high impact strength, wherein the cis isomer is present in an amount enough greater than about eighteen percent to be effective to impart high impact strength.
Dependencies are inferred from the claim text.