Block copolymer containing block from tetrahydrofuran

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...

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525186, 525385, C08F29300, C08F 468

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active

048016543

ABSTRACT:
A block copolymer is disclosed which includes an ethylene-propylene copolymer segment (A) and a tetrahydrofuran segment (B). The weight ratio of (A) to (B) is 5/95 to 95/5, and the block copolymer has a number-average molecular weight of about 1,000 to about 1,000,000.

REFERENCES:
patent: 3497573 (1970-02-01), Hostetler
patent: 3523144 (1970-08-01), Zimmerman 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 Tominaga Keii, "Living Coordination Polymerization of Propene Initiated by the Soluble V(acac).sub.3 -Al(C.sub.2 H.sub.5).sub.2 CL System," Macromolecules, 12, pp. 814-819 (1979).
Adv. Polym. Sci., 51, 101 (1983), Control of Molecular-Weight Distribution in Polyolefins Synthesized with Ziegler-Natta Catalytic Systems, Umberto Zucchini and Giuliano Cecchin.

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