Production of block-graft copolymers from polyolefines and synthetic polyamides

Claim 1

A PROCESS FOR THE PRODUCTION OF BLACK-GRAFT COPOLYMERS WHICH COMPRISES INTENSELY KNEADING AT A SHEAR STRESS OF AT LEAST ABOUT 1.0X103 KG./CM2 AT A TEMPERATURE OF ABOUT 50*C. TO 350*C. A MIXTURE OF: (A) 1 TO 90% BY WEIGHT OF A POLYMER WHICH HAS A MELT INDEX OF ABOUT 0.05 TO 25 G./10 MIXTURES AT 190*C. AND WHICH IS SELECTED FROM THE GROUP CONSISTING OF (1) HOMOPOLYMERS OF 2 TO 4 CARBON MONOOLEFINES AND STYRENE, AND (2) COPOLYMERS OF SAID MONOOLEFINES AND OF STYRENE WITH UP TO 50% BY WEIGHT OF OTHER OLEFINICALLY UNSATURATED MONOMERS; (B) 0.95 TO 98.95% BY WEIGHT OF A SYNTHETIC LINEAR POLYAMIDE CONTAINING RECURRING -NHCO-GROUPS IN THE MAIN CHAIN AND HAVING A MELT INDEX OF ABOUT 0.4 TO 50 G./10 MINUTES AT 240*C.,; AND (C) 0.05 TO 10% BY WEIGHT OF A FREE RADICAL FORMING CATALYST SELECTED FROM THE GROUP, CONSISTING OF ORGANIC PEROXIDES, PERBENZOATES, AZO-BISNITRILES AND ZAODISULFONATES, SAID PERCENTAGES BEING BASED ON THE TOTAL WEIGHT OF THE MIXTURE.