US4022724A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nitrocellulose alkyd resin lacquers containing bis-(hydroxyphenyl)-alkanes
Assignee: Bayer AG
•
Filing: 1975-07-18
•
Granted: 1977-05-10
•
Expires: 1995-07-18
Abstract
Abstract Alkyd resin lacquers which contain cellulose nitric acid esters can be prevented from "lifting" and yellowing by the addition of bis-[hydroxyphenyl]-alkanes which are substituted in the nucleus.
Inventors
- 👤 Hans Joachim Kreuder
- 👤 Bernd Peltzer
- 👤 Johannes Beckers
- 👤 Wolfgang Kremer
- 👤 Theo Kempermann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:38
CPC Classifications
C; C09; C09D; C09D101/00; C09D101/08; C09D101/16; C09D101/18; C08; C08K; C08K5/00; C08K5/04; C08K5/13; C08L; C08L1/00; C08L1/08; C08L1/16; C08L1/18; C08L67/00; C08L67/08; C09D167/00; C09D167/08
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
142 words
A non-lifting lacquer containing A. from 20 to 80% by weight of an alkyd resin; B. from 80 to 20% by weight of a cellulose nitric acid ester, said % by weights of (A) and (B) being based on the sum of the weights of (A) and (B) in said non-lifting lacquer and C. from 0.05 to 4% by weight, based on the weight of component (A), of at least one compound selected from the group consisting of ##STR2## wherein R 1 , R 2 , R 4 and R 5 are the same or different and are each alkyl having 1 to 6 carbon atoms or an optionally substituted cycloaliphatic radial having 5 to 7 carbon atoms and R 3 is alkyl having 1 to 6 carbon atoms, an optionally substituted cycloaliphatic radical having 5 to 7 carbon atoms or hydrogen.
Claim 2
Dependent Claim
142 words
A non-lifting lacquer containing A. from 20 to 80% by weight of an alkyd resin; B. from 80 to 20% by weight of a cellulose nitric acid ester, said % by weights of (A) and (B) being based on the sum of the weights of (A) and (B) in said non-lifting lacquer and C. from 0.05 to 4% by weight, based on the weight of component (A), of at least one compound selected from the group consisting of ##STR2## wherein R 1 , R 2 , R 4 and R 5 are the same or different and are each alkyl having 1 to 6 carbon atoms or an optionally substituted cycloaliphatic radial having 5 to 7 carbon atoms and R 3 is alkyl having 1 to 6 carbon atoms, an optionally substituted cycloaliphatic radical having 5 to 7 carbon atoms or hydrogen.
Claim 3
Dependent Claim
10 words
The non-lifting lacquer of claim 1 wherein (C) is bis-[2-hydroxy-5-methyl-3-cyclohexylphenyl)methane.
Claim 4
Dependent Claim
10 words
The non-lifting lacquer of claim 1 wherein (C) is 1-bis-(2-hydroxy-3,5-dimethylphenyl)isobutane.
References Cited (Backward Citations)
US2068634A
Cited
US2125484A
Cited
US2729571A
Cited
US2907722A
Cited
US3128260A
Cited
US3632837A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-05-09 | 1980-11-08 | 1981-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-09 | 1984-11-08 | 1985-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-09 | 1988-11-08 | 1989-05-10 | $7700.00 | Window Closed / Lapsed |