EP0048619A1
Expired / Lapsed
EP
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Rubber composition for tires
Assignee: Bridgestone Corp
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Filing: 1981-09-21
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Granted: —
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Expires: 2001-09-21
Abstract
Abstract A rubber composition for tires having low rolling resistance and high wet skid resistance, breakage strength and wear resistance comprises a rubber component containing at least 20 parts by weight of a high vinyl butadiene-styrene copolymer rubber obtained by randomly copolymerizing styrene with 1,3-butadiene, and containing 3-30% by weight of bonded styrene and 60-95% by weight of 1,2-bonds in the butadiene units, and further containing metal-butadienyl bonds in its main chain in a weight fraction of at least 20% by weight.
Inventors
- 👤 Tatsuo Fujimaki
- 👤 Shinsuke Yamaguchi
- 👤 Tomoharu Yamada
- 👤 Seisuke Tomita
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 12:33
CPC Classifications
C; C08; C08L; C08L7/00; B; B60; B60C; B60C1/00; B60C1/0016; C08C; C08C19/00; C08C19/30; C08C19/42; C08C19/44; C08L9/00; C08L9/06; Y; Y02; Y02T; Y02T10/00; Y02T10/80; Y02T10/86
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
93 words
A rubber composition for tires, characterized by comprising a rubber component containing at least 20 parts by weight, based on 100 parts by weight of the rubber component, of a high vinyl butadiene-styrene copolymer rubber obtained by randomly copolymerizing styrene and 1,3-butadiene, and containing 3-30% by weight of bonded styrene and 60-95% by weight of 1,2-bonds in the butadiene units, and further containing bonds of at least one metal selected from silicon, germanium, tin and lead with butadienyl groups in its main chain in a weight fraction of at least 20% by weight.
Claim 2
Dependent Claim
93 words
A rubber composition for tires, characterized by comprising a rubber component containing at least 20 parts by weight, based on 100 parts by weight of the rubber component, of a high vinyl butadiene-styrene copolymer rubber obtained by randomly copolymerizing styrene and 1,3-butadiene, and containing 3-30% by weight of bonded styrene and 60-95% by weight of 1,2-bonds in the butadiene units, and further containing bonds of at least one metal selected from silicon, germanium, tin and lead with butadienyl groups in its main chain in a weight fraction of at least 20% by weight.
Claim 3
Dependent Claim
51 words
_ A rubber composition as claimed in claim 1, characterized in that the rubber component is a rubber blend consisting of 20-80 parts by weight of the said high vinyl butadiene-styrene copolymer and 80-20 parts by weight of a diene rubber having a glass transition temperature of not higher than -50°C.
Claim 4
Dependent Claim
26 words
A rubber composition as claimed in claim 1 or 2, characterized by containing said metal-butadienyl bonds in a weight fraction of at least 40% by weight.
Claim 5
Dependent Claim
44 words
A rubber composition as claimed in any of claims 1 to 3, characterized by incorporating 1 to 40 parts by weight of a softening agent and 5.to 70 parts by weight of carbon black, based on 100 parts by weight of the rubber component.
References Cited (Backward Citations)
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