Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1991-10-16
1993-08-24
Kight, III, John
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
525259, 525271, 525314, C08F29300, C08F29404
Patent
active
052390098
ABSTRACT:
It is highly desirable for tire treads to exhibit good traction characteristics such as good wet skid resistance. However, it has traditionally been very difficult to improve the traction characteristics of a tire without sacrificing rolling resistance and tread wear. The high performance segmented elastomers of this invention offer a unique combination of desirable characteristics for utilization in making tire tread compositions. For instance, the rubbery polymers of this invention can be made into tire treads which exhibit outstanding traction characteristics while maintaining good rolling resistance and tread durability. This invention more specifically reveals a rubber polymer which has an excellent combination of properties for use in making tire treads which is comprised of repeat units which are derived essentially from at least one conjugated diene monomer, wherein the first segment has a number average molecular weight which is within the range of about 25,000 to about 350,000; and (b) a final segment which is comprised of repeat units which are derived from 1,3-butadiene, isoprene, and styrene, wherein the repeat units in the final segment are in essentially random order, and wherein the final segment has a number average molecular weight which is within the range of about 25,000 to about 350,000.
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Austin Laurie E.
Doucet Brian J.
Halasa Adel F.
Hsu Wen-Liang
Johnson Rachel F.
Kight III John
Rockhill Alvin T.
The Goodyear Tire & Rubber Company
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