Polypropylene molding composition and process for its preparatio

Details Polypropylene molding composition and process for its preparatio Polypropylene molding composition and process for its preparatio

1982-08-27

1984-09-25

Lieberman, Allan M.

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

Synthetic resins

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

525322, 525323, 525324, C08L 2306, C08L 2312, C08L 2316

Patent

active

044736878

ABSTRACT:
A polypropylene molding composition of polypropylene, ethylene-propylene copolymer and polyethylene having a high hardness and increased impact strength and homogeneity after processing is obtained by way of a continuous three-stage polymerization, when the melt viscosities of the polymer mixtures obtained in the individual stages are in a determined ratio of one to the other.

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