US4758648A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High speed cure sealant
Assignee: DIAMOND TECHNOLOGY PARTNERSHIP Co
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Filing: 1986-10-20
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Granted: 1988-07-19
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Expires: 2006-10-20
Abstract
Abstract A moisture curable sealant having good stability in the absence of moisture and a rapid cure rate in the sole presence of atmospheric moisture, said sealant comprising a polyurethane prepolymer having an isocyanate functionality between 2.3 and 3.0, and, admixed therewith as a catalyst, from 0.2 to 1.75 percent, by weight of said sealant, of dimorpholinodiethyl ether.
Inventors
- 👤 Sidky D. Rizk
- 👤 Harry W. S. Hsieh
- 👤 John J. Prendergast, Sr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:11
CPC Classifications
C; C09; C09K; C09K3/00; C09K3/10; C09K3/1006; C09K3/1021; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/10; C08G18/16; C08G18/18; C08G18/20; C08G18/2081; C09K2003/1034; C09K2003/1056
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
57 words
A moisture curable sealant having good stability in the absence of moisture and a rapid cure rate in the sole presence of atmospheric moisture, said sealant comprising a polyurethane prepolymer having an isocyanate functionality between 2.5 and 2.7 and, admixed therewith as a catalyst, from 0.2 to 1.75 percent, by weight of said sealant, of dimorpholinodiethyl ether.
Claim 2
Dependent Claim
57 words
A moisture curable sealant having good stability in the absence of moisture and a rapid cure rate in the sole presence of atmospheric moisture, said sealant comprising a polyurethane prepolymer having an isocyanate functionality between 2.5 and 2.7 and, admixed therewith as a catalyst, from 0.2 to 1.75 percent, by weight of said sealant, of dimorpholinodiethyl ether.
Claim 3
Dependent Claim
24 words
A sealant as in claim 1 wherein said catalyst is present in an amount of 0.4 to 1.3 percent by weight of said sealant.
Claim 4
Dependent Claim
26 words
A sealant as in claim 1 wherein said polyurethane prepolymer is the reaction product of an isocyanate having at least two isocyanate groups and a polyol.
Claim 5
Dependent Claim
13 words
A sealant as in claim 3 wherein said polyol is a polyether polyol.
Claim 6
Dependent Claim
21 words
A sealant as in claim 4 wherein said polyether polyol is a mixture of a polyether diol and a polyether triol.
Claim 7
Dependent Claim
21 words
A sealant as in clai wherein said polyether diol is a polyoxyalkylene diol and said polyether triol is a polyoxyalkylene triol.
Claim 8
Dependent Claim
21 words
A sealant as in clai wherein said polyether diol is a polyoxyalkylene diol and said polyether triol is a polyoxyalkylene triol.
Claim 9
Dependent Claim
20 words
A sealant as in claim 3 wherein said polyol is a mixture of a polyether polyol and a polyester polyol.
Claim 10
Dependent Claim
25 words
A sealant as in claim 1 which additionally comprises at least one filler and at least one plasticizer in amounts to obtain desired viscosity properties.
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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) | 1991-07-19 | 1992-01-18 | 1992-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-07-19 | 1996-01-18 | 1996-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-07-19 | 2000-01-18 | 2000-07-19 | $7700.00 | Window Closed / Lapsed |