US4535174A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Free-radical initiators and method for making
Assignee: General Electric Co
•
Filing: 1984-11-02
•
Granted: 1985-08-13
•
Expires: 2004-11-02
Abstract
Abstract Free-radical initiators are provided in the form of silylethers of arylpinacols. An aryl ketone is reacted with a monohalo- or dihalosilane having at least one olefinically unsaturated organic radical attached to silicon in the presence of an active metal reducing agent, such as magnesium.
Inventors
- 👤 James V. Crivello
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:53
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/18; C07F7/1804
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
147 words
Free-radical initiators selected from the class consisting of ##STR14## where R and R 1 are monovalent radicals selected from C.sub.(6-13) aryl hydrocarbon radicals and substituted C.sub.(6-13) aryl hydrocarbon radicals, and when joined together and attached to the same carbon atom are selected from divalent aryl radicals having the formula, ##STR15## R 2 is a monovalent radical selected from hydrogen, C.sub.(1-8) alkyl, C.sub.(1-8) haloalkyl, C.sub.(1-8) alkoxy or C.sub.(6-13) aryl, R 3 is selected from C.sub.(2-20) aliphatically unsaturated hydrocarbon radicals, substituted C.sub.(2-20) aliphatically unsaturated monovalent hydrocarbon radicals, C.sub.(4-20) cycloaliphatic unsaturated hydrocarbon radicals and substituted C.sub.(4-20) cycloaliphatic unsaturated hydrocarbon radicals and R 4 is selected from R 2 radicals and R 3 radicals and R 5 and R 6 are selected from divalent C.sub.(6-13) aryl hydrocarbon radicals and substituted C.sub.(6-13) aryl hydrocarbon radicals, X is selected from --O--, --S--, --CH 2 -- and ##STR16## and a is 0 or 1.
Claim 2
Dependent Claim
147 words
Free-radical initiators selected from the class consisting of ##STR14## where R and R 1 are monovalent radicals selected from C.sub.(6-13) aryl hydrocarbon radicals and substituted C.sub.(6-13) aryl hydrocarbon radicals, and when joined together and attached to the same carbon atom are selected from divalent aryl radicals having the formula, ##STR15## R 2 is a monovalent radical selected from hydrogen, C.sub.(1-8) alkyl, C.sub.(1-8) haloalkyl, C.sub.(1-8) alkoxy or C.sub.(6-13) aryl, R 3 is selected from C.sub.(2-20) aliphatically unsaturated hydrocarbon radicals, substituted C.sub.(2-20) aliphatically unsaturated monovalent hydrocarbon radicals, C.sub.(4-20) cycloaliphatic unsaturated hydrocarbon radicals and substituted C.sub.(4-20) cycloaliphatic unsaturated hydrocarbon radicals and R 4 is selected from R 2 radicals and R 3 radicals and R 5 and R 6 are selected from divalent C.sub.(6-13) aryl hydrocarbon radicals and substituted C.sub.(6-13) aryl hydrocarbon radicals, X is selected from --O--, --S--, --CH 2 -- and ##STR16## and a is 0 or 1.
Claim 3
Dependent Claim
3 words
The compound ##STR17##
Claim 4
Dependent Claim
3 words
The compound ##STR17##
Claim 5
Dependent Claim
3 words
The compound ##STR18##
Claim 6
Dependent Claim
3 words
The compound ##STR18##
Claim 7
Dependent Claim
3 words
The compound ##STR19##
Claim 8
Dependent Claim
3 words
The compound ##STR19##
Claim 9
Dependent Claim
3 words
The compound ##STR20##
Claim 10
Dependent Claim
3 words
The compound ##STR20##
Claim 11
Dependent Claim
3 words
The compound ##STR21##
Claim 12
Dependent Claim
3 words
The compound ##STR21##
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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) | 1988-08-12 | 1989-02-11 | 1989-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-08-12 | 1993-02-11 | 1993-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-08-12 | 1997-02-11 | 1997-08-13 | $7700.00 | Window Closed / Lapsed |