Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1987-06-12
1989-01-31
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...
525186, 525385, C08F29300, C08F 468
Patent
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.
Imai Chihiro
Makishima, deceased Tokuo
Makishima, legal representative by Nobuko
Ueki Satoshi
Briggs Sr. Wilbert J.
Markowitz S. H.
Muller W. G.
Murray, Jr. J. B.
TOA Nenryo Kogyo K.K.
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