Patent US4665147A successfully refreshed from Google Patents.
US4665147A
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Novel methacrylated siloxanes
Assignee: Henkel Loctite Corp
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Filing: 1984-09-24
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Granted: 1987-05-12
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Expires: 2004-09-24
Abstract
Abstract Methacrylated siloxanes are prepared by hydrosilation of beta(allyloxy)ethyl methacrylate using a silicon hydride functional siloxane. Propene elimination is not a significant side reaction of the method. Methacrylated silicones prepared in accordance with the invention are capable of anaerobic cure.
Inventors
- 👤 Qcheng S. Lien
- 👤 Steven T. Nakos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:53
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/04; C08G77/38; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/0834; C07F7/0838; C08G77/20; C08G77/42; C08G77/46
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
70 words
A method of preparing a methacrylated organosiloxane compound comprising reacting an organosiloxane compound having silicon hydride functionality comprising a plurality of repeat units of the formula: ##STR6## where R is an organo group and a is 1 or 2, with beta(allyloxy)ethyl methacrylate in the presence of an amount of hydrosilation catalyst effective for catalyzing a hydrosilation reaction between the allyl group on said methacrylate and said silicon hydride functional organosiloxane.
Claim 2
Independent Claim
70 words
A method of preparing a methacrylated organosiloxane compound comprising reacting an organosiloxane compound having silicon hydride functionality comprising a plurality of repeat units of the formula: ##STR6## where R is an organo group and a is 1 or 2, with beta(allyloxy)ethyl methacrylate in the presence of an amount of hydrosilation catalyst effective for catalyzing a hydrosilation reaction between the allyl group on said methacrylate and said silicon hydride functional organosiloxane.
Claim 3
Dependent Claim
17 words
A method as in claim 1 wherein a hydrosilation catalyst is selected from platinum-based and rhodium-based catalysts.
Claim 4
Dependent Claim
12 words
A method as in claim 2 wherein said catalyst is chloroplatinic acid.
Claim 5
Dependent Claim
24 words
A method as in claim 1 wherein the silicon hydride functional siloxane compound is a polyorganosiloxane having a molecular weight of 2500 or more.
Claim 6
Dependent Claim
18 words
A method as in claim 2 wherein the hydrosilation catalyst is selected from platinum and hydrocarbon platinum complexes.
Claim 7
Dependent Claim
12 words
A method as in claim 1 wherein R is a hydrocarbon group.
Claim 8
Dependent Claim
10 words
A method as in claim 6 wherein R is methyl.
Claim 9
Dependent Claim
27 words
A method as in claim 1 wherein said silicon hydride functional siloxane is selected from tetramethyldisiloxane, 1,3,5,7-tetramethylcyclotetrasiloxane and polydimethyl silicones containing a plurality of methylhydrosiloxane repeat units.
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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) | 1990-05-11 | 1990-11-10 | 1991-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-05-11 | 1994-11-10 | 1995-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-05-11 | 1998-11-10 | 1999-05-12 | $7700.00 | Window Closed / Lapsed |