Patent US4465535A successfully refreshed from Google Patents.
US4465535A
Expired / Lapsed
US
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Adhering cured polymers or prepolymers to high natural rubber content elastomer
Assignee: Bridgestone Firestone Inc
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Filing: 1983-09-12
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Granted: 1984-08-14
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Expires: 2003-09-12
Abstract
Abstract In repairing articles of natural rubber or elastomer predominantly of natural rubber with cured polymer or prepolymer (polyurethane/polyurea), adhering advantages are obtained especially at elevated temperatures when the damaged area is treated with halogen-containing oxidant dissolved in 1,2-dichloroethane instead of other solvents.
Inventors
- 👤 John W. Fieldhouse
- 👤 Russell W. Koch
- 👤 James Oziomek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:31
CPC Classifications
B; B29; B29C; B29C73/00; C; C08; C08J; C08J7/00; C08J7/12; C08J7/126; B29C73/04; B29C73/10; C08J5/00; C08J5/12; B29L; B29L2030/00; C08J2321/00; Y; Y10; Y10T; Y10T152/00; Y10T152/10; Y10T152/10495; Y10T152/10882; Y10T152/10909; Y10T428/00; Y10T428/31504; Y10T428/31551; Y10T428/31569; Y10T428/31826
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
74 words
A process for repairing damaged articles of cured elastomer selected from the group consisting of natural rubber and blends thereof with up to about 30% by weight of synthetic rubber, said process comprising the steps of (a) cleaning the area to be repaired; (b) applying to that area a halogen-containing oxidant dissolved in 1,2-dichloroethane; (c) applying to said oxidant-treated area an amine curable polymer or prepolymer and an amine curing agent in polar solvent;
Claim 2
Dependent Claim
74 words
A process for repairing damaged articles of cured elastomer selected from the group consisting of natural rubber and blends thereof with up to about 30% by weight of synthetic rubber, said process comprising the steps of (a) cleaning the area to be repaired; (b) applying to that area a halogen-containing oxidant dissolved in 1,2-dichloroethane; (c) applying to said oxidant-treated area an amine curable polymer or prepolymer and an amine curing agent in polar solvent;
Claim 3
Dependent Claim
23 words
(d) and curing the amine curable polymer or prepolymer at ambient temperature; whereby the cured polymer or prepolymer is bonded to the elastomer.
Claim 4
Dependent Claim
23 words
(d) and curing the amine curable polymer or prepolymer at ambient temperature; whereby the cured polymer or prepolymer is bonded to the elastomer.
Claim 5
Dependent Claim
12 words
The process of claim 1, wherein the process is for patching tires.
Claim 6
Dependent Claim
16 words
The process of claim 2, wherein the cured elastomer comprises at least about 80% natural rubber.
Claim 7
Dependent Claim
21 words
The process of claim 3, wherein the halogen-containing oxidant is selected from the group consisting of N-halosulfonamides, N-halohydantoins, N-haloamides and N-haloimides.
Claim 8
Dependent Claim
17 words
The process of claim 4, wherein the halogen-containing oxidant is selected from the group consisting of N-haloimides.
Claim 9
Dependent Claim
11 words
The process of claim 5, wherein the halogen-containing oxidant is trichloro-s-triazinetrione.
Claim 10
Dependent Claim
12 words
The process of claim 6, wherein the cured elastomer is natural rubber.
Claim 11
Dependent Claim
14 words
The process of claim 7, wherein the amine curable polymer or prepolymer is polyurethane.
Claim 12
Dependent Claim
18 words
The process of claim 8, wherein the curing agent comprises 4,4'-methylene dianiline and the polar solvent is acetone.
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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) | 1987-08-14 | 1988-02-13 | 1988-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-08-14 | 1992-02-13 | 1992-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-08-14 | 1996-02-13 | 1996-08-14 | $7700.00 | Window Closed / Lapsed |