Patent ID: 7291683

Claim:
A compatible blend composition comprising 99.99 to 90% by weight, relative to the entire blend, of at least two different incompatible thermoplastic molding compositions, 0.01 to 10% by weight, relative to the entire blend of carbodiimides and/or polycarbodiimides of the formula (I) R′—(—N═C═N—R—) n —R″ (I), where R represents an aromatic radical wherein at least one ortho-position with respect to the aromatic carbon atom having the carbodiimide group, carries aliphatic and/or cycloaliphatic substituents with at least 2 C-atoms, R′ represents aryl, aralkyl or R—NCO, R—NHCONHR 1 , R—NHCONR 1 R 2 or R—NHCOOR 3 , R″ represents —N═C═N-aryl, —N═C═N-aralkyl, —NCO, —NHCONHR 1 , —NHCONR 1 R 2 or —NHCOOR 3 , R 1 and R 2 are the same or different and represent an alkyl, cycloalkyl or aralkyl radical, and R 3 has one of the meanings of R 1 or represents a polyester or a polyamide radical, and n represents an integer from 2 to 5,000; and wherein at least one of the thermoplastic molding compositions comprises at least one functional group selected from the group consisting of carboxylic acid, hydroxyl group, amino group, and mercaptan group, and at least one of the thermoplastic molding compositions is a polyamide, and at least one of the thermoplastic molding compositions is a thermoplastics polyester, said polyester consisting of one or more polyalkylene terephthalates wherein said thermoplastics polyester is neither derived from the reaction of one or more dihydric phenols with one or more aromatic dicarboxylic acids nor from 1,4-cyclohexanedimethanol.