Ternary thermoplastic molding composition containing polypropyle

Details Ternary thermoplastic molding composition containing polypropyle Ternary thermoplastic molding composition containing polypropyle

1981-03-31

1982-03-09

Seccuro, Carman J.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525240, 525 88, C08L 2300, C08L 2316, C08L 2312, C08L 2306

Patent

active

043190049

ABSTRACT:
A ternary molding composition formed from an admixture of ethylene-propylene copolymer, polypropylene homopolymer, and polyethylene, which comprises 38-48% by weight of a partially crystalline ethylene-propylene copolymer with an ethylene content of at least 65% by weight, a melt index MFI (230/5) of 0.7-2.0 g/10 min, and a tensile strength of higher than 5.0 N/mm.sup.2 ; 27-63% by weight of a polypropylene homopolymer with a melt index MFI (230/5) of 25-65 g/10 min; and 3-30% by weight of polyethylene with a melt index MFI (230/5) of 15-20 g/10 min, the molding composition having a melt index MFI (230/5) of at least 8 g/10 min, a tensile strength of at least 15 N/mm.sup.2 and an elongation at yield of at least 450%.

REFERENCES:
patent: 3517086 (1970-06-01), Shirayama et al.
patent: 3919358 (1975-11-01), Batiuic et al.
patent: 4251646 (1981-02-01), Smith

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