Hydrogenated diene block copolymer and composition comprising th

Details Hydrogenated diene block copolymer and composition comprising th Hydrogenated diene block copolymer and composition comprising th

1990-05-18

1993-03-02

Carrillo, Ana L.

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

Synthetic resins

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

525285, 525940, 525279, 525286, 525301, 525303, 525310, 525312, 525 98, 525100, 525191, 525223, 525238, 525240, 525241, C08F29704, C08L 5302

Patent

active

051910241

ABSTRACT:
A hydrogenated diene block copolymer having a polystyrene-reduced number-average molecular weight of 50,000-600,000 which is a hydrogenation product of an (A)--(B) block copolymer in which (A) means an alkenyl aromatic compound polymer block and (B) means a conjugated diene homopolymer block wherein the vinyl content of the conjugated diene portion is more than 60%, or an alkenyl aromatic compound-conjugated diene random copolymer block wherein the vinyl content of the conjugated diene portion is 15% or more, an (A)--(B)--(C) block copolymer in which (A) and (B) are as defined above and (C) means an alkenyl aromatic compound-conjugated diene copolymer tapered block wherein the proportion of the alkenyl aromatic compound increases gradually, or an (A)--(B)--(A) block copolymer in which (A) and (B) are as defined above, in which block copolymer

REFERENCES:
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patent: 4628072 (1986-12-01), Shiraki et al.
patent: 4797447 (1989-01-01), Gergen et al.
patent: 4868243 (1989-09-01), Gelles et al.
patent: 4868245 (1989-09-01), Pettick et al.

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