COMPOSITION FOR SHAPE-MEMORY ELASTOMER, MOLDING FOR SHAPE-MEMORY ELASTOMER AND SHAPE-MEMORY ELASTOMER MOLDING

摘要

PROBLEM TO BE SOLVED: To provide a composition for a shape-memory elastomer, which can be given shape-memory properties at a lower temperature than conventional shape-memory rubbers and resins, i.e., at 50-120C, and a shape-memory elastomer molding which undergoes little memory return during storage, can restore the shape in a shorter time at a lower temperature, i.e., at 50-120C, than conventional products while it is in use, and which is excellent in mechanical properties, heat resistance, weatherability, chemical resistance and rubber elasticity after shape restoration.;SOLUTION: The composition for a shape-memory elastomer contains a crosslinked particulate rubber (A), an olefin resin (B) having a Vicat softening point of 121-180C, a resin (C) having a melting point of 50-120C, and a softener (D) [the weight ratio of the ingredient (A) to the ingredient (B) being 90/10 to 50/50 (the total of these ingredients being 100 pts.wt.), and the contents of the ingredient (C) and the ingredient (D) respectively being 5-70 pts.wt. and 5-100 pts.wt. based on 100 pts.wt. of the total of the ingredient (A) and the ingredient (B)]. A molding for a shape-memory elastomer and a shape-memory elastomer molding are provided which are obtained from the composition.;COPYRIGHT: (C)2003,JPO