Process for producing a diolefin polymer or copolymer and a rubb

Details Process for producing a diolefin polymer or copolymer and a rubb Process for producing a diolefin polymer or copolymer and a rubb

1994-01-21

1996-06-18

Teskin, Fred

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

Synthetic resins

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

525272, 525313, 5253319, 5253332, 525342, 525352, 525370, 525375, 525377, 525379, 525382, 525383, 525386, 526175, 526180, 526181, 526220, C08F 842, C08F 408

Patent

active

055278604

ABSTRACT:
A process for producing a diolefin polymer or copolymer, comprising the steps of polymerizing 55-100 wt % of a conjugated diolefin with 0-45 wt % of an aromatic vinyl compound as monomers in a hydrocarbon as a solvent, by using initiators: a reaction product [a1] between at least one secondary amine compound (A) and an organic lithium compound and/or a lithium amide compound [a2] of the at least one secondary amine compound (A) as well as a reaction product [b1] between at least one alcohol (B) and an organic lithium compound and/or a lithium alkoxide compound of the at least one alcohol (B). A rubber composition containing not less than 30 wt % of such a diolefin polymer or copolymer with respect to an entire rubber component is also disclosed. This rubber composition exhibits excellent abrasion resistance, high tensile strength, steering stability and low rolling resistance, and is suitable for tires, particularly, as treads of low fuel consumption tires.

REFERENCES:
patent: 4129705 (1978-12-01), de Zarauz
patent: 4401800 (1983-08-01), Hall
patent: 4647634 (1987-03-01), Jalics
patent: 4914147 (1990-03-01), Mouri et al.
patent: 4933401 (1990-06-01), Hattori et al.
patent: 5300599 (1994-04-01), Hsu et al.
patent: 5393721 (1995-02-01), Kitamura et al.

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