US4163097A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crosslinkable polymeric compounds
Assignee: ROHNER AG
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Filing: 1977-12-27
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Granted: 1979-07-31
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Expires: 1997-12-27
Abstract
Abstract The invention relates to organic polymers which can be crosslinked under the action of light and which are suitable for carrying out photomechanical processes. These polymers are photochemically considerably more sensitive than known comparable polymers and their sensitivity can additionally also be further increased by means of a combination with sensitizers. The molecular weight is at least 1,000. The polymers contain, as light-sensitive groups, groups of the formula I ##STR1## wherein R and R 1 independently of one another denote alkyl groups with at most 4 C atoms, or R and R 1 conjointly denote the remaining part of a 5-membered to 6-membered carbocyclic ring.
Inventors
- 👤 Niklaus Baumann
- 👤 Hans Zweifel
- 👤 Marcus Bauman
- 👤 John S. Waterhouse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:28
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/68; C08G63/685; C08G63/6854; C08G63/6858; C08F; C08F22/00; C08F22/36; C08F22/40; C08G69/00; C08G69/02; C08G69/44; C08G73/00; C08G73/02; C08G73/06; C08G73/10; C08G73/1003; C08G73/12; C08G73/14; C08G73/16; C08G85/00; G; G03; G03F; G03F7/00; G03F7/004; G03F7/038; G03F7/0388; Y; Y10; Y10S; Y10S522/00; Y10S522/904
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
147 words
A polyether, which can be crosslinked under the action of electromagnetic waves, having an average molecular weight of 1000 to 1,000,000 as measured by viscometry of a solution of 0.2 gram of polymer in 100 ml of N,N-dimethylformamide, which is characterized by a structural formula comprising chain members of the formula ##STR80## in which MI denotes the maleimido group of formula I ##STR81## wherein R and R 1 independently of one another denote alkyl of 1 to 4 carbon atoms, or R and R 1 conjointly denote the remaining part of a five-membered to six-membered carbocyclic ring, Y 3 represents an aliphatic, cycloaliphatic, carbocyclicaromatic, araliphatic, heterocyclic-aliphatic or heterocyclic-aromatic radical containing in each case, a total of at most up to 18 carbon atoms or denotes the grouping ##STR82## and R 8 represents hydrogen, carboxyl or --COO(CH 2 ) z CH 3 where z is 0 to 18.
Claim 2
Dependent Claim
147 words
A polyether, which can be crosslinked under the action of electromagnetic waves, having an average molecular weight of 1000 to 1,000,000 as measured by viscometry of a solution of 0.2 gram of polymer in 100 ml of N,N-dimethylformamide, which is characterized by a structural formula comprising chain members of the formula ##STR80## in which MI denotes the maleimido group of formula I ##STR81## wherein R and R 1 independently of one another denote alkyl of 1 to 4 carbon atoms, or R and R 1 conjointly denote the remaining part of a five-membered to six-membered carbocyclic ring, Y 3 represents an aliphatic, cycloaliphatic, carbocyclicaromatic, araliphatic, heterocyclic-aliphatic or heterocyclic-aromatic radical containing in each case, a total of at most up to 18 carbon atoms or denotes the grouping ##STR82## and R 8 represents hydrogen, carboxyl or --COO(CH 2 ) z CH 3 where z is 0 to 18.
Claim 3
Dependent Claim
13 words
A polyether according to claim 1 wherein the maleimido group MI is ##STR83##
Claim 4
Dependent Claim
13 words
A polyether according to claim 2 wherein the maleimido group MI is ##STR84##
Claim 5
Dependent Claim
13 words
A polyether according to claim 1 wherein Y 3 is a carbocyclic-aromatic radical.
Claim 6
Dependent Claim
11 words
A polyether according to claim 4 wherein Y 3 is carboxyphenylene.
Claim 7
Dependent Claim
11 words
A polyether according to claim 1 wherein R 8 is hydrogen.
References Cited (Backward Citations)
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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) | 1982-07-30 | 1983-01-29 | 1983-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-07-30 | 1987-01-29 | 1987-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-07-30 | 1991-01-29 | 1991-07-31 | $7700.00 | Window Closed / Lapsed |