Elastomers having reduced hysteresis prepared with vinyl polycyc

Details Elastomers having reduced hysteresis prepared with vinyl polycyc Elastomers having reduced hysteresis prepared with vinyl polycyc

1993-11-03

1994-09-20

Lipman, Bernard

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

Synthetic resins

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

525316, C08F25506

Patent

active

053490240

ABSTRACT:
A tire treadstock elastomer having reduced hysteresis is prepared by (1) preparing a living polymer by anionic polymerization of a conjugated diene or copolymerization of a conjugated diene with a monovinyl aromatic hydrocarbon, (2) endcapping the living polymer with at least 2.2 equivalents, preferably 3 to 15 equivalents, of a vinyl substituted bicyclic or tricyclic (preferably bicyclic) hydrocarbon, (3) quenching and recovering the endcapped polymer and (4) curing the endcapped polymer using a conventional rubber curing recipe to form an elastomer having reduced hysteresis. This elastomer either alone or blended with a conventional treadstock rubber may form a tire treadstock. The preferred endcapping agent is 2-vinylnaphthalene.

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