Conjugated diene block polymer and process for preparing the sam

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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526335, C08F29702

Patent

active

044368739

ABSTRACT:
A conjugated diene block polymer composed of blocks having a different microstructure from each other such that one block contains 20 to 60% by mole of 1,2- and/or 3,4-bonding, the other block contains 50 to 90% by mole of 1,2- and/or 3,4-bonding, the difference in the 1,2- and/or 3,4-bonding content between the both blocks is from 20 to 50% mole and the average content of 1,2- and/or 3,4-bonding in the polymer is from 50 to 85% by mole. The block polymer has a high wet skid resistance and a low dynamic heat generating property, and is very useful as a material for automobile tires.

REFERENCES:
patent: 4091051 (1978-05-01), Moczygemba
patent: 4107236 (1978-08-01), Naylor
patent: 4294942 (1981-10-01), Henderson

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