Back to results
US 3,937,681 AGranted
Tire tread of homopolymers of butadiene
AssigneeChemische Werke Huels Aktiengesellschaft
InventorKarl-Heinz Nordsiek
Life of this patent
Estimating the term…
Abstract
For facilitating the production of automotive tire treads of satisfactory abrasion and skid resistance, there is provided a composition consisting essentially of: A. a polybutadiene containing 25-50% of monomer units arranged in the 1,2-position; 10-40% of 1,4-cis-double bonds; 15-55% of 1,4-trans-double bonds; and an ML-4 value of 40-120; B. 5-100 parts by weight of a plasticizer oil; and C. 30-120 parts by weight of a carbon black.
Claims10
A vulcanizable composition shaped into tire tread strip form, consisting essentially of
- a. 100 parts by weight of a polybutadiene consisting of 25-50% monomer units arranged in the 1,2-position;
- 10-40% monomer units arranged in the 1,4-cis position;
- and correspondingly 15-55% monomer units arranged in the 1,4-trans position, the ratio of cis to trans structures being 10:55 to 40:5, said polybutadiene having an ML-4 100.degree. C. value of 70-120 and being prepared by subjecting a lithium polymerized polybutadiene having an ML-4 100.degree. C. value of 10-60 to a molecular weight jump or coupling reaction to increase the molecular weight thereof;
- b. 5-100 parts by weight of a plasticizer oil;
- and
- c. 30-120 parts by weight of a carbon black filler.
3 more elements
Dependencies are inferred from the claim text.