Abstract: This specification provides a biodegradable poly(lactic acid) of a star-shaped structure having a high molecular weight of more than 30,000 with excellent tensile strength and a process for its preparation which comprises direct polycondensation of lactic acid using polyhydroxyl compound having at least four hydroxyl groups.

Abstract: The invention relates to resorbable homopolymers and copolymers which are substantially free from polymerization catalysts and processes for preparing them.

Abstract: In summary, the invention is related to the discovery of a class of compounds which inhibits the reaction of a polyepoxide with a curing agent at low temperatures. More particularly the invention relates to an epoxy resin composition comprisinga) a polyepoxide; andb) a cure inhibitor comprising boric acid.

Abstract: Disclosed is a thermoplastic polyester resin composition, which comprises (A) 99-60 parts by weight of a thermoplastic polyester resin, (B) 1-40 parts by weight of a polyorganosiloxane rubber, (C) 0.01-10 parts by weight, per 100 parts by weight of the sum of the components (A) and (B), of an organic silane compound having at least one functional group selected from the group consisting of an epoxy group, and isocyanate group and an amino group, and (D) 0-300 parts by weight, per 100 parts by weight of the sum of the components (A) and (B), of a reinforcing filler. This composition results in a shaped article having an improved impact resistance while retaining good heat stability and weatherability inherently possessed by the thermoplastic polyester.