HETEROPHASIC POLYMER COMPOSITION OF HIGH STIFFNESS

摘要

THE PRESENT INVENTION RELATES TO A HETEROPHASIC POLYMER COMPOSITION WHICH COMPRISES (I) A MATRIX COMPRISING A PROPYLENE HOMOPOLYMER AND/OR A PROPYLENE COPOLYMER HAVING AN AMOUNT OF COMONOMER UNITS OF LESS THAN 1.0 WT%, AND (II) AN ELASTOMERIC POLYPROPYLENE WHICH IS DISPERSED WITHIN THE MATRIX AND COMPRISES COMONOMER UNITS DERIVED FROM ETHYLENE AND/OR A C4 TO C12 ALPHA-OLEFIN; AND WHEREIN THE HETEROPHASIC POLYMER COMPOSITION HAS AN AMORPHOUS FRACTION AM IN AN AMOUNT OF 2.0 TO 7.5 WT%, AND THE AMORPHOUS FRACTION AM HAS AN AMOUNT OF ETHYLENE- AND/OR C4 TO C12 ALPHA-OLEFIN-DERIVED COMONOMER UNITS OF 20 TO 45 WT%.