Production of propylene block copolymer

Details Production of propylene block copolymer Production of propylene block copolymer

1987-08-03

1988-06-14

Michl, Paul R.

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

Synthetic resins

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

525323, C08F 202, C08F 212, C08L 2316

Patent

active

047512652

ABSTRACT:
A propylene-ethylene block copolymer is produced by continuous bulk polymerization in which propylene alone is polymerized or propylene and ethylene are copolymerized at the ethylene/propylene reaction ratio of 6/94 using propylene as a liquid medium, and subsequently by batch-wise copolymerization in which propylene and ethylene are copolymerized at the ethylene/propylene reaction ratio from 85/15 to 5/95.

REFERENCES:
patent: 3732335 (1973-05-01), Hermans
patent: 4066718 (1978-01-01), Saito
patent: 4245062 (1981-01-01), Suzuki
patent: 4291138 (1981-09-01), Sato
patent: 4297445 (1981-10-01), Short
patent: 4337326 (1982-06-01), Shiga

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