CROSS-LINKABLE OR CURABLE POLYLACTONE COMPOSITION, CROSS-LINKED OR CURED MOLDING MADE THEREFROM AND PROCESS FOR THE PRODUCTION THEREOF

摘要

A crosslinkable polylactone-based composition comprising formulating 100 parts by weight of a polylactone (A) whose number average molecular weight is in the range of 10,000 to 300,000 and 0.1 to 30 parts by weight of a crosslinkable monomer (B) which can confine the molecular chain of the polylactone (A) by irradiating active energy radiation or by heating, a production method of a polylactone-based crosslinked molded article prepared by irradiating active energy radiation or by heating after melting and molding the above-mentioned crosslinkable polylactone-based composition at the temperature where crosslinking does not occur, and a polylactone-based crosslinked molded article obtained by the above method are offered. A cured polylactone-based molded article having similar properties is also obtained from the curable polylactone-based composition composed of a polylactone or polylactone composition (X) comprising a prescribed polylactone (C) and polyvalent alcohol (D), and a prescribed curing agent (Y). Since these molded articles obtained have biodegradability as well as excellent mechanical strength, thermal resistance, oil resistance, abrasion resistance, and shape-memorizable property which is a property to deform showing rubber elasticity on applying an external force when it is heated to soften and to tend to recover its initial shape of the molded article when it is reheated to soften, the product can be used for a sheet for fixing a patient in radiation therapy, a material for transcribing a shape of wig, a material for transcribing a shape of teeth, and gypsum.