Propylene copolymer composition

Details Propylene copolymer composition Propylene copolymer composition

1992-10-19

1994-07-19

Seccuro, Jr., 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...

428516, C08L 2310, C08L 2314, C08L 2318

Patent

active

053310543

ABSTRACT:
A propylene copolymer composition enabling the production of a film having excellent low-temperature heat sealing ability and blocking resistance, is obtained by blending 1 to 70 wt % of a component A and 30 to 99 wt % of a component B. The component A comprises either a propylene homopolymer or a copolymer of propylene with not more than 10 mol % of ethylene or an a-olefin having a carbon number of 4 to 20, and has a molecular weight distribution (Mw/Mn) of not more than 3, a mean elution temperature of 40.degree. to 100.degree. C., and an elution dispersion degree (.sigma. value) of not more than 10. The component B comprises a copolymer of propylene with ethylene and/or an .alpha.-olefin having a carbon number of 4 to 20, and has a molecular weight distribution (Mw/Mn) of 3.5 to 10.

REFERENCES:
patent: 3472829 (1969-10-01), Claybaugh et al.
patent: 4211690 (1980-07-01), Asano et al.
patent: 4303708 (1981-12-01), Gebhardt et al.
patent: 4390385 (1983-06-01), Ferguson et al.
patent: 4500682 (1985-02-01), Chiba et al.
patent: 4892851 (1990-01-01), Ewen et al.

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