Continuous production of olefin block copolymers

Details Continuous production of olefin block copolymers Continuous production of olefin block copolymers

1979-09-28

1981-10-27

Hamrock, William F.

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

Synthetic resins

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

525 53, 525268, 525323, C08F25502, C08F25504

Patent

active

042974453

ABSTRACT:
A method for continuous production of block copolymers having a block of propylene homopolymer and blocks of polymer of ethylene. The block copolymers produced thereby. In a first stage a first reaction mixture containing a polymer of ethylene is produced with continuous transfer of a portion of this reaction mixture along with propylene monomer and a catalyst modifier into a second stage in which a block copolymer having a block of propylene homopolymer and blocks of polymer of ethylene is produced. In preferred embodiments the polymer of ethylene is ethylene homopolymer and/or ethylene-propylene random copolymer.

REFERENCES:
patent: 3702352 (1972-11-01), Leibson
patent: 3732335 (1973-05-01), Hermans et al.

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