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Patent US4075167A successfully refreshed from Google Patents.
US4075167A
Expired / Lapsed
US
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Maleimido group-containing organosilicon compounds
Assignee: Shin-Etsu Chemical Co Ltd
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Filing: 1975-12-24
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Granted: 1978-02-21
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Expires: 1995-12-24
Abstract
Abstract Novel organosilicon compounds having in a molecule at least one maleimido group bonded to a silicon atom through a Si-C linkage, synthesized by reaction of a derivative of maleic anhydride with an organosilicon compound having an amino-substituted hydrocarbon group bonded to the silicon atom. The reaction proceeds in two steps, the first step being addition of the amino group to the maleic anhydride derivative to form an amide structure and the second step being dehydration of the amide structure to form a maleimido ring. The organosilicon compounds having remarkable photosensitivity can be polymerized and cured on exposure to ultraviolet light, and the cured films are insoluble in organic solvents.
Inventors
- 👤 Minoru Takamizawa
- 👤 Yasushi Yamamoto
- 👤 Yoshio Inoue
- 👤 Atsumi Noshiro
- 👤 Hitoshi Fujii
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:00
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/04; C08G77/38; C08G77/382; C08G77/388; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/0834; C07F7/0838; C07F7/0872; C07F7/0889; C07F7/18; C07F7/1804; C07F7/21; C08G77/22; C08G77/26
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
119 words
An organosilicon compound represented by the formula ##STR17## wherein R 1 is a monovalent aromatic group selected from the group consisting of phenyl, naphthyl and substituted phenyl, R 2 is hydrogen, chlorine, cyano or methyl, R 3 is phenylene or lower alkylene, R 4 is a monovalent hydrocarbon group selected from the group consisting of methyl, ethyl, propyl phenyl, benzyl, phenylethyl, tolyl, ethylphenyl, vinyl, allyl and cyclohexyl, X is selected from the group consisting of hydroxy, halogen, alkoxy, acyloxy and aminoxy a is zero or 1, b is a positive number not exceeding 1, and c and d each are zero or positive numbers not exceeding 3 with the proviso that b+c+d is a positive number not exceeding 4.
Claim 2
Dependent Claim
119 words
An organosilicon compound represented by the formula ##STR17## wherein R 1 is a monovalent aromatic group selected from the group consisting of phenyl, naphthyl and substituted phenyl, R 2 is hydrogen, chlorine, cyano or methyl, R 3 is phenylene or lower alkylene, R 4 is a monovalent hydrocarbon group selected from the group consisting of methyl, ethyl, propyl phenyl, benzyl, phenylethyl, tolyl, ethylphenyl, vinyl, allyl and cyclohexyl, X is selected from the group consisting of hydroxy, halogen, alkoxy, acyloxy and aminoxy a is zero or 1, b is a positive number not exceeding 1, and c and d each are zero or positive numbers not exceeding 3 with the proviso that b+c+d is a positive number not exceeding 4.
Claim 3
Dependent Claim
14 words
The organosilicon compound as claimed in claim 1 wherein b+c+d is equal to 4.
Claim 4
Dependent Claim
14 words
The organosilicon compound as claimed in claim 1 wherein b+c+d is smaller than 4.
Claim 5
Dependent Claim
32 words
The organosilicon compound as claimed in claim 1 wherein said monovalent aromatic group denoted by R 1 is selected from the class consisting of phenyl, tolyl, naphthyl and their halogen substituted derivatives.
Claim 6
Dependent Claim
15 words
The organosilicon compound as claimed in claim 1 wherein R 2 is a methyl group.
Claim 7
Dependent Claim
15 words
The organosilicon compound as claimed in claim 1 wherein R 3 is an alkylene group.
Claim 8
Dependent Claim
16 words
The organosilicon compound as claimed in claim 6 wherein said alkylene group is a propylene group.
Claim 9
Dependent Claim
32 words
The organosilicon compound as claimed in claim 1 wherein said monovalent hydrocarbon group denoted by R 4 is selected from the class consisting of methyl, ethyl, propyl, vinyl, allyl and phenyl groups.
Claim 10
Dependent Claim
19 words
The organosilicon compound as claimed in claim 1 wherein said hydrolyzable group denoted by X is an alkoxy group.
Claim 11
Dependent Claim
16 words
The organosilicon compound as claimed in claim 9 wherein said alkoxy group is a methoxy group.
References Cited (Backward Citations)
US3444128A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-02-20 | 1981-08-22 | 1982-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-20 | 1985-08-22 | 1986-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-20 | 1989-08-22 | 1990-02-21 | $7700.00 | Window Closed / Lapsed |