EP0447066A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Pneumatic tyres
Assignee: Bridgestone Corp
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Filing: 1991-02-27
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Granted: —
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Expires: 2011-02-27
Abstract
Abstract As a tread rubber of a pneumatic tire is used a rubber composition comprising 10-150 parts by weight of a silica filler, 0-150 parts by weight of carbon black and 0.2-10 parts by weight of at least one specified silane coupling agent, based on 100 parts by weight of a particular polymer rubber having a glass transition temperature of not lower than -50°C through polymerization of 1,3-butadiene or copolymerization of 1,3-butadiene and styrene with an organic alkali metal initiator, or a rubber blend of not less than 30 parts by weight of the above polymer and not more than 70 parts by weight of another diene series rubber.
Inventors
- 👤 Tatsuro Hamada
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-24 23:35
CPC Classifications
C; C08; C08C; C08C19/00; C08C19/30; C08C19/42; C08C19/44; B; B60; B60C; B60C1/00; B60C1/0016; C08K; C08K5/00; C08K5/54; C08K5/5406
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
210 words
A pneumatic tire having a tread made from a rubber composition comprising 10-150 parts by weight of a silica filler, 0-150 parts by weight of carbon black and 0.2-10 parts by weight of at least one silane coupling agent represented by the following general formula: Y₃-Si-C n H 2n A wherein Y is an alkyl group or alkoxyl group having a carbon number of 1-4 or a chlorine atom, provided that three Ys are the same or different, n is an integer of 1-6, and A is -S m C n H 2n Si-Y₃ group, -X group or SmZ group (in which X is a nitroso group, a mercapto group, an amino group, an epoxy group, a vinyl group, an imido group or a chlorine atom, Z is of m and n is an integer of 1-6 and Y is the same as mentioned above), based on 100 parts by weight of a polymer rubber having a glass transition temperature of not lower than -50°C through polymerization of 1,3-butadiene or copolymerization of 1,3-butadiene and styrene with an organic alkali metal initiator, or a rubber blend of not less than 30 parts by weight of the said polymer and not more than 70 parts by weight of another diene series rubber.
Claim 2
Dependent Claim
130 words
A tire as claimed in claim 1, wherein said polymer or copolymer is a silane-modified polymer having a glass transition temperature of not lower than -50°C and obtained by reacting an active terminal of a resulting living polymer through polymerization of 1,3-butadiene or copolymerization of 1,3-butadiene and styrene with an organic alkali metal initiator with a silane compound represented by the following general formula: U i Si(OR) j R′ 4-i-j wherein U is a halogen atom selected from chlorine, bromine and iodine, each of R and R′ is an alkyl group, an aryl group, a vinyl group or a halogenated alkyl group each having a carbon number of 1-20, j is an integer of 1-4, i is an integer of 0-2 and a sum of i and j is 2-4.
Claim 3
Dependent Claim
22 words
A tire as claimed in claim 1 or 2, wherein said copolymer has a content of bound styrene of 15-50% by weight.
Claim 4
Dependent Claim
63 words
A tire as claimed in any of claims 1 to 3, wherein said copolymer has a structure that styrene single chain of styrene unit in the molecule of the polymer is less than 40% by weight of total bound styrene content and styrene long chain of 8 or more styrene units is not less than 10% by weight of total bound styrene content.
Claim 5
Dependent Claim
34 words
A tire as claimed in any of claims 1 to 4, wherein said rubber composition contains 15-100 parts by weight of said silica filler and 0.5-5 parts by weight of said silane coupling agent.
Claim 6
Dependent Claim
129 words
A tire as claimed in claim 2, wherein said silane compound is selected from the group consisting of tetrakis(2-ethylhexyloxy) silane, tetraphenoxy silane, methyltris(2-ethylhexyloxy) silane, ethyltris(2-ethylhexyloxy) silane, ethyltrisphenoxy silane, vinyltris(2-ethylhexyloxy) silane, ethyltriphenoxy silane, vinyltris(2-ethylhexyloxy) silane, vinyltriphenoxy silane, methylvinylbis(2-ethylhexyloxy) silane, ethylvinylbiphenoxy silane, monomethyltriphenoxy silane, dimethyldiphenoxy silane, monoethyltriphenoxy silane, diethyldiphenoxy silane, phenyltriphenoxy silane, diphenyldiphenoxy silane, tetraphenoxy silane, ethyltriphenoxy silane, vinyltriphenoxy silane, dimethyldiphenoxy silane, monoethyltriphenoxy silane, diethyldiphenoxy silane, phenyltriphenoxy silane, diphenyldiphenoxy silane, tri-t-butoxymonochloro silane, dichloro-di-t-butoxy silane, di-t-butoxy-diiodo silane, triphenoxymonochloro silane, monochloromethyldiphenoxy silane, monochloromethylbis(2-ethylhexyloxy) silane, monobromoethyldiphenoxy silane, monobromovinyldiphenoxy silane, monobromoisopropenylbis(2-ethylhexyloxy) silane, ditolyloxydichloro silane, diphenoxydiiodo silane, methyltris(2-methylbutoxy) silane, vinyltris(2-methylbutoxy) silane, monochloromethylbis(2-methylbutoxy) silane, vinyltris(3-methylbutoxy) silane, tetrakis(2-ethylhexyloxy) silane, tetraphenoxy silane, methyltris(2-ethylhexyloxy) silane, ethyltris(2-ethylhexyloxy) silane, ethyltriphenoxy silane, vinyltris(2-ethylhexyloxy) silane, vinyltriophenoxy silane, methylvinylbis(2-ethylhexyloxy) silane, ethylvinyldipehnoxy silane, triphenoxymonochloro silane, monochloromethyldiphenoxy silane, monobromoethyldiphenoxy silane, monobromovinyldiphenoxy silane, ditolyldichloro silane and diphenoxydiiodo silane.
References Cited (Backward Citations)
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