Patent ID: 6894113

Claim:
Thermoset material with improved impact resistance comprising: 99 to 20% of a thermoset resin, and 1 to 80% of an impact modifier comprising at least one copolymer comprising S-B-M, B-M and M-B-M blocks, wherein: each block is connected to the other by a covalent bond or an intermediate molecule connected to one of the blocks via a covalent bond and to the other block via another covalent bond, the M blocks of the block copolymers comprise at least 60% by weight of syndiotactic PMMA, B is incompatible with the thermoset resin and with the M block and its glass transition temperature Tg is less than 0° C., and S is incompatible with the thermoset resin, the B block and the M block and its Tg or its melting temperature is greater than the Tg of B.