THERMOSET RESIN COMPOSITIONS WITH INCREASED TOUGHNESS

摘要

A block copolymer (M) suitable for toughening a thermoset resin (R) said block copolymer (M) having at least one block derived from a thermoplastic aromatic polymer (A) which exhibits a glass transition temperature (Tg) of at least about 150°C and at least one block derived from a low Tg polymer (B) wherein: (i) the low Tg polymer (B) exhibits a Tg in the range of from about 130°C to about +40 °C; (ii) the aromatic polymer (A) is soluble in the uncured thermoset resin precursor(s) (P) of said thermoset resin (R); and (iii) the low Tg polymer (B) is insoluble in the uncured thermoset resin precursor (P); curable polymer compositions comprising said block copolymer and thermoset resins derived therefrom.