COPOLYAMIDE THERMOPLASTIQUE, COMPOSITION A BASE DE CE COPOLYAMIDE THERMOPLASTIQUE

摘要

The invention concerns a thermoplastic copolyamide and a composition comprising as matrix said thermoplastic copolyamide, and a method for making such a thermoplastic copolyamide. More particularly it concerns a copolyamide of the statistical tree type resulting from the reaction between a plurifunctional monomer comprising at least three reactive functions to form an amide function, said functions being of two different types, and bifunctional monomers conventionally used in making linear polyamides. The resulting copolyamide has a very low softness index in molten state compared to the linear polyamide and improved shock-resistant properties. The invention also concerns methods for making these copolyamides and compositions for moulding, extruding or injecting parts. Said compositions comprise fillers and additives and said copolyamide as matrix.