Plastic and nonmetallic article shaping or treating: processes – With step of making mold or mold shaping – per se
Reexamination Certificate
2007-10-02
2007-10-02
Pezzuto, Helen L (Department: 1713)
Plastic and nonmetallic article shaping or treating: processes
With step of making mold or mold shaping, per se
C264S230000, C264S334000, C425S440000, C526S262000, C526S347000, C526S347100
Reexamination Certificate
active
11493218
ABSTRACT:
Shape memory polymers prepared by copolymerizing two monomers, which each separately produce polymers characterized by different glass transition temperatures in the presence of a multi-functional monomer whereby the copolymer formed is cross-linked during the polymerization to form a thermoset network. The transition temperature of the final polymers is adjusted by the ratio of the monomers selected, to from about 150° C. to about 270° C., while the degree of crosslinking controls the rubbery modulus plateau. The shape memory polymers can be processed as castable formulations in the form of bulk articles, coatings and films. The invention also relates to the articles of manufacture thereof and methods of the preparation and use thereof.
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Cornerstone Research Group
Pezzuto Helen L
Wegman Hessler & Vanderburg
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