US3939294A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adhesives and their use
Assignee: Bridgestone Firestone Inc
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Filing: 1974-08-01
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Granted: 1976-02-17
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Expires: 1994-08-01
Abstract
Abstract The adhesive properties of compositions which contain an organic isocyanate, with or without a film-former, are improved by the inclusion of (a) an aliphatic hydrocarbyl nitrite or (b) a nitrite ester of a carbamic acid which acts as an adhesive promoter. The compositions are useful for adhering natural and synthetic polymeric elastomers, and are particularly useful in the production of laminations formed from polyurethane polymers and other substrates including metals, etc. and especially the formation of laminations from the cured tread of a conventional rubber to a curable polyurethane prepolymer composition which can be formed in the shape of a tire body.
Inventors
- 👤 John William Fieldhouse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:48
CPC Classifications
B; B32; B32B; B32B25/00; B32B25/04; B32B25/042; B60; B60C; B60C1/00; B32B25/14; B32B7/00; B32B7/04; B32B7/12; B60C7/00; C; C08; C08J; C08J5/00; C08J5/12; B32B2605/00; C08J2321/00; Y; Y10; Y10S; Y10S156/00; Y10S156/91; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551; Y10T428/31573; Y10T428/31587; Y10T428/31855
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
111 words
A lamination of two rubber substrates adhered by a cured adhesive composition which comprises an organic isocyanate and an adhesive promoter having the formula ##EQU5## or X.R(NH.COO.NO).sub. x in which R 1 , R 2 and R 3 represent a saturated or unsaturated hydrocarbyl group of 2 to 16 carbon atoms or C, R 1 , R 2 and R 3 represent a hydrocarbyl group which includes a cyclic-containing aliphatic hydrocarbyl group of 5 to 7 carbon atoms, R is an aliphatic, cycloaliphatic or aromatic hydrocarbyl group of 1 t0 16 carbon atoms, X is hydrogen or --NCO or --NH.COO.NO or --NH.COO.C.sub. 6 H 5 and x is 1 or 2.
Claim 2
Dependent Claim
111 words
A lamination of two rubber substrates adhered by a cured adhesive composition which comprises an organic isocyanate and an adhesive promoter having the formula ##EQU5## or X.R(NH.COO.NO).sub. x in which R 1 , R 2 and R 3 represent a saturated or unsaturated hydrocarbyl group of 2 to 16 carbon atoms or C, R 1 , R 2 and R 3 represent a hydrocarbyl group which includes a cyclic-containing aliphatic hydrocarbyl group of 5 to 7 carbon atoms, R is an aliphatic, cycloaliphatic or aromatic hydrocarbyl group of 1 t0 16 carbon atoms, X is hydrogen or --NCO or --NH.COO.NO or --NH.COO.C.sub. 6 H 5 and x is 1 or 2.
Claim 3
Dependent Claim
14 words
The lamination of claim 1 in which one of the substrates includes polyurethane rubber.
Claim 4
Dependent Claim
21 words
The lamination of claim 1 in which the adhesive composition includes a viscosity-reducing polymeric film-former and the promoter is isoamyl nitrite.
Claim 5
Dependent Claim
21 words
The lamination of claim 1 in which the adhesive composition includes a viscosity-reducing polymeric film-former and the promoter is cyclohexyl nitrite.
Claim 6
Dependent Claim
17 words
The lamination of claim 3 in which the substrates are an olefinic rubber and a polyurethane rubber.
Claim 7
Dependent Claim
17 words
The lamination of claim 4 in which the substrates are an olefinic rubber and a polyurethane rubber.
Claim 8
Dependent Claim
12 words
The lamination of claim 5 in which the promoter is isoamyl nitrite.
Claim 9
Dependent Claim
12 words
The lamination of claim 5 in which the promoter is cyclohexyl nitrite.
Claim 10
Dependent Claim
16 words
The lamination of claim 3 in which the substrates are a pneumatic tire tread and carcass.
Claim 11
Dependent Claim
23 words
The lamination of claim 4 in which one substrate is an olefinic tire tread and the other substrate is a curable polyurethane carcass.
Claim 12
Dependent Claim
12 words
The lamination of claim 10 in which the promoter is isoamyl nitrite.
Claim 13
Dependent Claim
12 words
The lamination of claim 10 in which the promoter is cyclohexyl nitrite.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-02-16 | 1979-08-18 | 1980-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-02-16 | 1983-08-18 | 1984-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-02-16 | 1987-08-18 | 1988-02-17 | $7700.00 | Window Closed / Lapsed |