EP0643117A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Rubber based adhesive composite and tire with tread prepared therewith
Assignee: Goodyear Tire and Rubber Co
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Filing: 1994-09-01
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Granted: —
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Expires: 2014-09-01
Abstract
Abstract A composite of a flexible, releasable backing having a particularly thin, sulfur vulcanizable, carbon black filled, adhesive rubber composition strip in a form of a coating thereon for application to a tire tread splice where the adhesive composition comprises a rubber composition containing a sulfur curative together with carbon black, processing oil, resin and, optionally, rosin oil. The invention is further directed to a method of preparing a tire having a tread with its ends joined together with said adhesive rubber composition strip being applied to the tread splice from its flexible backing and to a tire with tread prepared thereby.
Inventors
- 👤 Bharat Kanchanlal Kansupada
- 👤 Ramendra Nath Majumdar
- 👤 Pawan Kumar Handa
- 👤 William Gary Stevenson
- 👤 Robert Elmer Barnes
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-29 22:57
CPC Classifications
C; C09; C09J; C09J107/00; B; B60; B60C; B60C1/00; B60C1/0016; C09J109/00; C08; C08L; C08L2666/00; C08L2666/02; C08L2666/04; C08L2666/08
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
173 words
A composite of a flexible, releasable backing characterized by having a sulfur vulcanizable, carbon black filled, adhesive rubber composition coating in a form of an adhesive rubber strip, thereon, where the adhesive rubber composition is comprised of, based on 100 parts by weight rubber; (A) 35 to 70 parts by weight (phr) cis 1,4-polyisoprene natural rubber and, correspondingly, 30 to 65 phr of at least one of synthetic cis 1,4-polyisoprene rubber and cis 1,4-polybutadiene rubber; (B) up to 10 phr of styrene/butadiene copolymer rubber; (C) 35 to 55 parts by weight carbon black; (D) 1 to 10 phr rubber processing oil; (E) 2 to 10 phr nonreactive phenol-formaldehyde resin; (F) up to 15 phr of rosin oil; and (G) 1.5 to 3 phr insoluble sulfur in a blend of insoluble sulfur and processing oil containing 60 to 80 weight percent sulfur; wherein said adhesive rubber composition is prepared by casting the adhesive rubber composition as a dispersion in a volatile organic solvent onto said backing and drying the composition to remove the solvent.
Claim 2
Dependent Claim
19 words
The composite of claim 1 wherein said adhesive rubber composition strip has a thickness of 1 to 6 mils.
Claim 3
Dependent Claim
39 words
The composite of claim 1 or 2 wherein the adhesive rubber strip contains not more than 2 phr of a total of stearic acid, waxes, peptizers and antidegradant(s) based on paraphenylene diamine if it contains any of such ingredients.
Claim 4
Dependent Claim
37 words
A pneumatic rubber tire characterized by having an outer rubber tread in the form of a circumferential rubber strip with its ends joined and adhered together through the adhesive rubber composition strip of any of claims 1-3.
Claim 5
Independent Claim
109 words
A method of preparing a pneumatic rubber tire characterized in that it comprises building an outer unvulcanized rubber tread strip circumferentially around an unvulcanized rubber carcass, joining the ends of said tread strip with the unvulcanized adhesive rubber composition strip of any of claims 1 - 3 and vulcanizing the resulting assembly under conditions of heat and pressure; wherein said unvulcanized adhesive rubber composition strip is applied to one tread strip end from a releasable flexible backing following which the flexible backing is removed from the adhesive rubber composition strip and the tread strip ends pressed together with said adhesive rubber composition strip therebetween prior to said vulcanization step.
Claim 6
Dependent Claim
32 words
The tire prepared according to the method recited in claim 5 wherein the rubber component of the adhesive composition is comprised essentially of cis 1,4-polyisoprene natural rubber and synthetic cis 1,4-polyisoprene rubber.
Claim 7
Dependent Claim
31 words
The tire prepared according to the method recited in claim 5 wherein the rubber component of the adhesive composition is comprised essentially of cis 1,4-polyisoprene natural rubber and cis 1,4-polybutadiene rubber.
Claim 8
Dependent Claim
35 words
The tire prepared according to the method recited in claim 5 wherein the rubber component of the adhesive composition is comprised essentially of cis 1,4-polyisoprene natural rubber, synthetic cis 1,4-polyisoprene rubber and cis 1,4-polybutadiene rubber.
Claim 9
Dependent Claim
24 words
The tire prepared according to the method recited in claim 5 wherein the adhesive rubber strip contains 2 to 10 phr of rosin oil.
References Cited (Backward Citations)
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