Block copolymers having ethylene-propylene copolymer blocks and

Details Block copolymers having ethylene-propylene copolymer blocks and Block copolymers having ethylene-propylene copolymer blocks and

1988-07-05

1990-05-01

Briggs, Sr., Wilbert J.

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

Synthetic resins

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

525268, 525309, C08F29706, C08F29708, C08F29300

Patent

active

049219014

ABSTRACT:
A novel block copolymer is disclosed which includes a random ethylene-propylene copolymer segment (A) and a methacrylate segment (B). The block copolymer has a number-average molecular weight of about 1,000 to about 600,000 and a ratio of (A) to (B) of 15/85 to 97/3 by weight.

REFERENCES:
patent: 3497573 (1970-02-01), Hostetler
patent: 4028435 (1977-06-01), Seki et al.
patent: 4057600 (1977-11-01), Kimura et al.
patent: 4792595 (1988-12-01), Cozewith et al.
Yoshiharu Doi, Satoshi Ueki, and Tominaga Keii, "Preparation of Living Polypropylenes by a Soluble Vanadium-based Ziegler Catalyst", Makromol. Chem., 180, pp. 1359-1361, (1979).
Yoshiharu Doi, Satoshi Ueki, and Tominga Keii, "Living Coordination Polymerization of Propene Initiated by the Soluble V(acac)3-Al(C.sub.2 H.sub.5).sub.2 Cl System", Macromolecules, 12, pp. 814-819 (1979).
Umberto Zucchini and Giuliano Cecchin, "Control of Molecular-Weight Distribution in Polyolefins Synthesized with Ziegler-Natta Catalyst Systems", Adv. Polym. Sci., 51, 101, 122 (1983).

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