Patent US4444976A successfully refreshed from Google Patents.
US4444976A
Expired / Lapsed
US
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Sag resistant two component adhesive and sealant
Assignee: Goodyear Tire and Rubber Co
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Filing: 1982-12-20
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Granted: 1984-04-24
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Expires: 2002-12-20
Abstract
Abstract An improved two component adhesive whereby said adhesive exhibits sag resistance on a vertical surface substantially immediately after the two components are mixed with adequate gel time for use thereof said two component adhesive being composed of a polyurethane prepolymer component and a curative component mixed at a ratio of 4:1.
Inventors
- 👤 Thomas G. Rabito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:12
CPC Classifications
C; C09; C09J; C09J175/00; C09J175/04; C09J175/12; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/10; C08G18/12; Y; Y10; Y10S; Y10S528/00; Y10S528/905
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
101 words
A two component adhesive composed of a polyurethane prepolymer component having free NCO and a curative component, said curative component being comprised of a mixture of 5 to 15 mols of a reactive hydrogen containing material having 2 to 5 hydroxyls of 100 to 3000 molecular weight and 0.5 to 3.0 mols of a secondary diamine having a molecular weight less than 325 said adhesive being characterized when the components are mixed at a ratio of 4:1 on a weight basis of being sag resistant immediately after mixing and exhibiting a gel time at 24° C. of at least two minutes.
Claim 2
Dependent Claim
101 words
A two component adhesive composed of a polyurethane prepolymer component having free NCO and a curative component, said curative component being comprised of a mixture of 5 to 15 mols of a reactive hydrogen containing material having 2 to 5 hydroxyls of 100 to 3000 molecular weight and 0.5 to 3.0 mols of a secondary diamine having a molecular weight less than 325 said adhesive being characterized when the components are mixed at a ratio of 4:1 on a weight basis of being sag resistant immediately after mixing and exhibiting a gel time at 24° C. of at least two minutes.
Claim 3
Dependent Claim
30 words
The adhesive of claim 1 wherein the secondary diamine exhibits the ability to develop a turbidity in the hot methylene chloride test with isocyanate in the prepolymer within 30 seconds.
Claim 4
Dependent Claim
26 words
The adhesive of claim 1 wherein the secondary diamine is a dialkyl-N,N'-alkylene diamine where the total carbons in the alkyl and alkylene groups are about 20.
Claim 5
Dependent Claim
20 words
The adhesive of claim 1 wherein the reactive hydrogen containing material of the curative component contains three or four hydroxyls.
Claim 6
Dependent Claim
16 words
The adhesive of claim 1 wherein the reactive hydrogen containing material is a dialkanol of aniline.
Claim 7
Dependent Claim
10 words
The adhesive of claim 1 wherein the diamine is piperazine.
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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) | 1987-04-24 | 1987-10-24 | 1988-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-04-24 | 1991-10-24 | 1992-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-04-24 | 1995-10-24 | 1996-04-24 | $7700.00 | Window Closed / Lapsed |