Patent US3902950A successfully refreshed from Google Patents.
US3902950A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rubber to polyester adhesion
Assignee: Goodyear Tire and Rubber Co
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Filing: 1974-03-27
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Granted: 1975-09-02
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Expires: 1994-03-27
Abstract
Abstract This invention relates to a method for improving the adhesion of polyester reinforcement materials to rubber and to improving the fatigue resistance of polyester rubber reinforcing materials by modifying the polyester surface with a solvent such as hexafluoroisopropanol, treating the modified surface with an adhesive and incorporating the adhesive treated polyester in a rubber compound.
Inventors
- 👤 William C T Tung
- 👤 Leroy C T Lin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:49
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/04; C08J5/06; C08J2321/00; Y; Y10; Y10S; Y10S156/00; Y10S156/91; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2973; Y10T428/2978; Y10T428/31504; Y10T428/31786
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
66 words
A METHOD FOR TREATING A POLYESTER CORD TO IMPROVE RUBBER TO POLYESTER ADHESION COMPRISING DIPPING A NORMALLY SMOOTH POLYESTER CORD IN A SOLVENT SELECTED FROM THE GROUP CONSISTING OF HEXAFLUOROACETONESQUIHYDRATE AND HEXAFLUOROISOPROPANOL FOR A TIME SUFFICIENT TO DISSOLVE AT LEAST A PORTION OF THE SURFACE OF THE POLYESTER CORD, REMOVING SAID CORD FROM THE SOLVENT AND ALLOWING THE SOLVENT REMAINING ON SAID CORD TO RAPIDLY EVAPORATE.
Claim 2
Independent Claim
66 words
A METHOD FOR TREATING A POLYESTER CORD TO IMPROVE RUBBER TO POLYESTER ADHESION COMPRISING DIPPING A NORMALLY SMOOTH POLYESTER CORD IN A SOLVENT SELECTED FROM THE GROUP CONSISTING OF HEXAFLUOROACETONESQUIHYDRATE AND HEXAFLUOROISOPROPANOL FOR A TIME SUFFICIENT TO DISSOLVE AT LEAST A PORTION OF THE SURFACE OF THE POLYESTER CORD, REMOVING SAID CORD FROM THE SOLVENT AND ALLOWING THE SOLVENT REMAINING ON SAID CORD TO RAPIDLY EVAPORATE.
Claim 3
Dependent Claim
19 words
A method as described in claim 1 wherein the temperature of the solvent is between 20* and 40* C.
Claim 4
Dependent Claim
13 words
A method as described in claim 1 wherein the polyester is polyethylene terephthalate.
Claim 5
Dependent Claim
21 words
A method as described in claim 1 wherein the solvent is a mixture of hexafluoroisopropanol and the additional solvent methylene dichloride.
Claim 6
Dependent Claim
38 words
A method as described in claim 1 wherein the cord is subsequently coated with an adhesive and embedded in a rubber stock, followed by the step of curing said rubber stock with said cord as an reinforcing agent.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-01 | 1979-03-03 | 1979-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-01 | 1983-03-03 | 1983-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-01 | 1987-03-03 | 1987-09-02 | $7700.00 | Window Closed / Lapsed |