Diene block polymer and polymer composition

Details Diene block polymer and polymer composition Diene block polymer and polymer composition

Filed on

1988-11-23

Date issued

1992-07-28

Examiner

Seccuro, Carman J.

Patent Class

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

SubClass

Synthetic resins

SubSubClass

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

Other Related Categories

525 71, 525 98, 525 99, 525250, 525269, C08F29704

Type

Patent

Status

active

Patent number

051341999

Description

ABSTRACT:
A diene block polymer contains (A) a resinous polybutadiene block having a glass transition temperature of -80.degree. C. or less, a crystalline melting point of 30.degree. to 130.degree. C., 80% to 93% of trans units, 5 to 15% of cis units, and 1 to 10% of vinyl units, a molecular weight of 10,000 to 200,000, and a molecular weight distribution Mw/Mn of 1.2 to 4 and (B) a conjugated diene rubbery block having a glass transition temperature of -20.degree. C. or less and either not having a crystalline melting point or having a crystalline melting point of 0.degree. C. or less, wherein the ratio of blocks (A) to blocks (B) is 2 to 80:98 to 20 (ratio by weight), the molecular weight is 20,000 to 500,000, and the molecular weight distribution Mw/Mn is 1.1 to 5 and a polymer composition containing the same.

REFERENCES:
patent: 3629213 (1971-12-01), Onishi et al.
patent: 3726824 (1973-04-01), Saunders et al.
patent: 4433109 (1984-02-01), Takeuchi et al.
patent: 4436873 (1984-03-01), Furukawa et al.
patent: 4547560 (1985-10-01), Hattori et al.
patent: 4616065 (1986-10-01), Hargis et al.
patent: 4619982 (1986-10-01), Jenkins
patent: 4669518 (1987-06-01), Hargis et al.
patent: 4689368 (1987-08-01), Jenkins
patent: 4782119 (1988-11-01), Tsutsumi et al.
D. K. Jenkins, "Butadiene polymerization with a rare earth compound using a magnesium alkyl cocatalyst:1", Polymer, vol. 26, Jan. 1985, pp. 147-151.

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