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

1992-09-01

1994-04-26

Jagannathan, Vasu S.

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

Synthetic resins

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

525279, 525282, 525285, 525286, 525293, 525301, 525303, 525312, 525 98, 525940, 525105, C08F29704, C08L 5302

Patent

active

053067797

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 and in which hydrogenation product at least 80% of the double bonds of the conjugated diene portion is saturated by the hydrogenation. Said hydrogenated diene block copolymer is useful as a modifier for polar resins, non-polar resins or both of them.

REFERENCES:
patent: 4242470 (1980-12-01), Gergen et al.
patent: 4628072 (1986-12-01), Shiraki et al.

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