Process for producing modified polypropylene

Details Process for producing modified polypropylene Process for producing modified polypropylene

1975-02-18

1976-08-10

Holler, Alan

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C08F29708

Patent

active

039742369

ABSTRACT:
Heteroblock copolymers of propylene and ethylene containing a relatively small quantity of an isotactic polypropylene segment, a copolymer segment of very low ethylene (polymerized) content, and another copolymer segment of high ethylene (polymerized) content, in which the quantities of the three types of segments are specific, and in which the isotactic polypropylene content is specific, which heteroblock copolymers are produced by three types of successive steps of polymerization with the monomer feeds in specific ratios of ethylene/propylene, the ratio being zero for the first step.

REFERENCES:
patent: 3629368 (1971-12-01), Fukuda et al.
patent: 3670053 (1972-06-01), Sennari et al.

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