US4888404A
Expired / Lapsed
US
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Method of improving shelf life of silicone elastomeric sealant
Assignee: Dow Silicones Corp
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Filing: 1989-02-27
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Granted: 1989-12-19
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Expires: 2009-02-27
Abstract
Abstract The method of this invention produces an elastomeric silicone sealant having an improved shelf life. The sealant comprises an alkoxysilethylene ended polydiorganosiloxane polymer, an alkoxytrialkoxysilane crosslinker, and a titanium catalyst.
Inventors
- 👤 Jerome M. Klosowski
- 👤 Michael D. Meddaugh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:09
CPC Classifications
C; C09; C09K; C09K3/00; C09K3/10; C09K3/1006; C09K3/1018; C08; C08K; C08K5/00; C08K5/54; C08K5/541; C08K5/5415; C08L; C08L83/00; C08L83/14; C09K2003/1034; C09K2003/1053; Y; Y10; Y10S; Y10S528/00; Y10S528/901
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
81 words
A silicone polymer of the formula, where each R is free of aliphatic unsaturation and is selected from the group consisting of monovalent hydrocarbon, monovalent halohydrocarbon, and monovalent cyanoalkyl radicals of 1 to 18 inclusive carbon atoms, each R" is methyl, ethyl, propyl, or butyl, a is 0 or 1, b is 1, c is from 1 to 6, and x is of a value such that the polymer has a viscosity of from 0.5 to 3000 Pa.s at 25° C.
Claim 2
Dependent Claim
81 words
A silicone polymer of the formula, where each R is free of aliphatic unsaturation and is selected from the group consisting of monovalent hydrocarbon, monovalent halohydrocarbon, and monovalent cyanoalkyl radicals of 1 to 18 inclusive carbon atoms, each R" is methyl, ethyl, propyl, or butyl, a is 0 or 1, b is 1, c is from 1 to 6, and x is of a value such that the polymer has a viscosity of from 0.5 to 3000 Pa.s at 25° C.
Claim 3
Dependent Claim
33 words
The polymer of claim 1 where R is methyl, ethyl, propyl, phenyl, or trifluoropropyl, c is 1, and x is such that the viscosity is from 0.5 to 1000 Pa.s at 25° C.
Claim 4
Dependent Claim
16 words
The polymer of claim 2 where R is methyl, R" is methyl, and a is 0.
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) | 1992-12-18 | 1993-06-19 | 1993-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-12-18 | 1997-06-19 | 1997-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-12-18 | 2001-06-19 | 2001-12-19 | $7700.00 | Window Closed / Lapsed |