Random copolymer with enhanced ethylene content
View Patent ↗A polypropylene resin, useful for the production of biaxially oriented polypropylene (BOPP) film, is provided. The polymer of the present invention is a blend of high crystalline polypropylene homopolymer and a high ethylene ethylene/propylene random copolymer (RCP). The present invention also provides a method of preparing the novel resin as well as a novel BOPP film comprising the resin.
1. A resin composition comprising:
a. about 70% to about 95% by weight of a polypropylene homopolymer, said polypropylene homopolymer having a xylene solubles content of less than 3% by weight and a crystallinity of at least 55%; and
b. about 5% to about 30% by weight of an ethylene/propylene copolymer, said ethylene/propylene copolymer containing ethylene of greater than 8% to about 15% by weight, wherein a majority of said ethylene in said ethylene/propylene copolymer is random.
2. The resin composition according to claim 1 , further comprising at least one additive selected from the group consisting of nucleators, antioxidants, acid neutralizers, slip agents, antiblock agents, antifogging agents, pigments, and combinations thereof.
3. A resin composition comprising:
a. about 70% to about 85% of a polypropylene homopolymer having a xylene solubles content of less than 3% by weight and a crystallinity of at least 55%; and
b. about 15% to about 30% by weight of an ethylene/propylene copolymer, said ethylene/propylene copolymer containing ethylene of greater than about 8% to about 15% by weight, wherein a majority of said ethylene in said ethylene/propylene copolymer is random.
4. The resin composition according to claim 3 , further comprising at least one additive selected from the group consisting of nucleators, antioxidants, acid neutralizers, slip agents, antiblock agents, antifogging agents, pigments, and combinations thereof.