Patent US5089537A successfully refreshed from Google Patents.
US5089537A
Expired / Lapsed
US
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UV curable silicone emulsions
Assignee: Dow Silicones Corp
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Filing: 1989-05-22
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Granted: 1992-02-18
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Expires: 2009-05-22
Abstract
Abstract A silicone emulsion is prepared by emulsion polymerizing a hydroxyl endblocked polydiorganosiloxane oligomer with a combination of a siloxane or siloxane precursor containing unsaturated hydrocarbon groups and a functional silicone selected from the group consisting of organosilicon hydrides and mercaptoalkylsilanes or siloxanes, or with an acryl or methacryl functional siloxane. When the emulsion of the copolymer produced is combined with a photoinitiator, the copolymer can be crosslinked by exposure to ultraviolet radiation. When the water is removed, an elastomer results. The emulsion can be used to produce coatings and sealants.
Inventors
- 👤 Donald T. Liles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:16
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/24; C08J3/26; C08G; C08G77/00; C08G77/04; C08G77/06; C08G77/20; C08G77/22; C08G77/28; C08L; C08L83/00; C08L83/04; C08L83/08; C08G77/12; C08G77/14; C08G77/16; C08J2383/00; C08J2383/04
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
110 words
An aqueous silicone emulsion comprising a continuous water phase, a dispersed phase, and sufficient surfactant to form a stable emulsion; the dispersed phase consisting essentially of a hydroxyl endblocked polydiorganosiloxane having a molecular weight above 50,000 and containing both non-conjugated unsaturated hydrocarbon group substituted siloxane units, in which said unsaturated hydrocarbon groups there are from 2 to 6 carbon atoms, selected from the group consisting of vinyl, allyl, and hexenyl radicals; and either hydrogen on silicon substituted siloxane units or mercaptoalkylsiloxane units; and a photoinitiator, in the same dispersed particles; which emulsion, when crosslinked by exposure to ultraviolet light, produces an elastomer upon removal of the water at room temperature.
Claim 2
Dependent Claim
110 words
An aqueous silicone emulsion comprising a continuous water phase, a dispersed phase, and sufficient surfactant to form a stable emulsion; the dispersed phase consisting essentially of a hydroxyl endblocked polydiorganosiloxane having a molecular weight above 50,000 and containing both non-conjugated unsaturated hydrocarbon group substituted siloxane units, in which said unsaturated hydrocarbon groups there are from 2 to 6 carbon atoms, selected from the group consisting of vinyl, allyl, and hexenyl radicals; and either hydrogen on silicon substituted siloxane units or mercaptoalkylsiloxane units; and a photoinitiator, in the same dispersed particles; which emulsion, when crosslinked by exposure to ultraviolet light, produces an elastomer upon removal of the water at room temperature.
Claim 3
Dependent Claim
10 words
The emulsion of claim 1 which also includes a filler.
Claim 4
Dependent Claim
21 words
The emulsion of claim 1 which has been exposed to sufficient ultraviolet light to cause the dispersed phase to become crosslinked.
References Cited (Backward Citations)
US4370160A
Cited
US4248751A
Cited
US4273634A
Cited
US4962153A
Cited
US4978710A
Cited
JPH01228064A
Cited
US4954565A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-02-17 | 1995-08-19 | 1996-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-02-17 | 1999-08-19 | 2000-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-02-17 | 2003-08-19 | 2004-02-18 | $7700.00 | Window Closed / Lapsed |