EP0104133A2
Expired / Lapsed
EP
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Composite tread compounds for improved traction and rolling resistance
Assignee: Goodyear Tire and Rubber Co
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Filing: 1983-09-07
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Granted: —
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Expires: 2003-09-07
Abstract
Abstract A composite tread 20 has at least a low hysteresis component 24 and a high hysteresis component 26 therein. The components are geometrically arranged such that upon wear, generally more of the high hysteresis compound is exposed as wear progresses which imparts good traction to the life of the tread.
Inventors
- 👤 Edward Joseph Haas
- 👤 Edward Charles Montgomery
- 👤 Robert Matthews Pierson
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 10:00
CPC Classifications
B; B60; B60C; B60C11/00; B60C11/14; B60C11/18; B60C1/00; B60C1/0016; B60C11/0041; B60C11/005; B60C11/0058; Y; Y02; Y02T; Y02T10/00; Y02T10/80; Y02T10/86; Y10; Y10T; Y10T152/00; Y10T152/10; Y10T152/10495; Y10T152/10855
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
31 words
A tread for a tire, comprising: at least a high hysteresis component and at least a low hysteresis component, said low hysteresis component being predominant in the radially outermost tread surface.
Claim 2
Dependent Claim
31 words
A tread for a tire, comprising: at least a high hysteresis component and at least a low hysteresis component, said low hysteresis component being predominant in the radially outermost tread surface.
Claim 3
Dependent Claim
24 words
A tread for a tire according to Claim 1, wherein said high hysteresis component is predominant in the radially inner portions of said tread.
Claim 4
Dependent Claim
41 words
A tread for a tire according to Claim 2, wherein said high hysteresis component has a rebound number of about 50 to about 30, and wherein said low hysteresis component has a rebound number of from about 50 to about 80.
Claim 5
Dependent Claim
90 words
A tread for a tire according to Claim 3, wherein said low hysteresis component comprises an elastomer made from monomers selected from the group consisting of dienes having from 4 to 12 carbon atoms, natural cis-l,4-polyisoprene, and combinations thereof, wherein said high hysteresis component comprises a copolymer made from dienes having from 4 to 12 carbon atoms and vinyl substituted aromatics having from 8 to 12 carbon atoms in which the weight percent of said vinyl substituted aromatic ranges from about 15 to about 50 weight percent, and combinations thereof.
Claim 6
Dependent Claim
34 words
A tread for a tire according to Claim 4, wherein said high hysteresis component has a configuration in said tread so that upon wear thereof, generally more of said high hysteresis component is exposed.
Claim 7
Dependent Claim
50 words
A tread for a tire according to Claim 5, wherein said tread contains two component materials, wherein said high hysteresis component material has a rebound value of from about 45 to about 35, and wherein said low hysteresis material has a rebound of from ' about 60 to about 70.
Claim 8
Dependent Claim
64 words
A tread for a tire according to Claim 1, 3, 4, or 6, wherein said high hysteresis component has an oil loading range of from about 40 parts to about 70 parts per 100 parts by weight of said elastomer, or a carbon black loading of from about 70 parts to about 100 parts per 100 parts by weight of said elastomer, or both.
Claim 9
Dependent Claim
99 words
A tread for a tire according to Claim 7, wherein said low hysteresis material is selected from the group consisting of polybutadiene, natural or synthetic polyisoprene, and combinations thereof, said low hysteresis material having at least 90 percent of the repeating units of the cis configuration, and wherein said high hysteresis material is a styrene-butadiene copolymer having from 15 to 35 weight percent of styrene and wherein said oil loading is from about 50 to about 60 parts per 100 of elastomer, wherein said carbon black loading is from about 80 to about 90 parts per 100 of elastomer.
Claim 10
Dependent Claim
35 words
A tread for a tire according to Claim 8, wherein said high hysteresis material is distributed so that upon wear of said tread, the amount of said high hysteresis material in said surface generally increases.
Claim 11
Dependent Claim
47 words
A tire having a tread thereon, the tread comprising: at least one low rolling resistant material and at least one frictional material, said materials forming separate domains in said tread and being contiguously contacted such that said low rolling material predominates in the radial outermost tread surface.
Claim 12
Dependent Claim
47 words
A tire having a tread thereon, the tread comprising: at least one low rolling resistant material and at least one frictional material, said materials forming separate domains in said tread and being contiguously contacted such that said low rolling material predominates in the radial outermost tread surface.
Claim 13
Dependent Claim
28 words
ll. A tire having a tread thereon according to Claim 10, wherein the amount of said frictional material generally increases in the radially inward direction of said tread.
Claim 14
Dependent Claim
42 words
A tire having a tread thereon according to Claim 11, wherein said frictional material has a rebound number of about 50 to about 30, and wherein said low rolling resistant material has a rebound number of from about 50 to about 80.
Claim 15
Dependent Claim
91 words
A tire having a tread thereon according to Claim 12, wherein said low rolling resistant material comprises an elastomer made from monomers selected from the group consisting of dienes having from 4 to 12 carbon atoms, natural cis-l,4-polyisoprene, and combinations thereof, wherein said frictional material comprises a copolymer made from dienes having from 4 to 12 carbon atoms and vinyl substituted aromatics having from 8 to 12 carbon atoms in which the weight percent of said vinyl substituted aromatic ranges from about 15 to about 50 weight percent, and combinations thereof.
Claim 16
Dependent Claim
47 words
A tire having a tread thereon according to Claim 13, wherein said tread contains two component materials, wherein said frictional material has a rebound of about 45 to about 30, and wherein said low rolling resistant material has a rebound of from about 60 to about 70.
Claim 17
Dependent Claim
56 words
A tire having a tread thereon according to Claim 10, 12, 13, or.14, wherein said frictional material has an oil loading range of from about 40 parts to about 70 parts per 100 parts of said elastomer, or a carbon black loading of from about 70 parts to about 100 parts of said elastomer, or both.
Claim 18
Dependent Claim
103 words
A tire having a tread thereon according to Claim 15, wherein said low rolling resistant material is selected from the group consisting of polybutadiene, natural or synthetic polyisoprene, and combinations thereof, said low rolling resistant material having at least 90 percent of the repeating units of the cis configuration, and wherein said frictional material is a styrene-butadiene copolymer having from 15 to 35 mole percent of styrene and wherein said oil loading is from about 50 to about 60 parts per 100 parts of elastomer, and wherein said carbon black loading is from about 80 to about 90 parts per 100 of elastomer.
Claim 19
Dependent Claim
34 words
A tire having a tread thereon according to Claim 16, wherein said frictional material is distributed so that upon wear of said tread, the amount of said frictional material in said surface generally increases.
References Cited (Backward Citations)
No citation records indexed.
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