US4038250A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light protecting agents
Assignee: Novartis Corp
•
Filing: 1975-04-24
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Granted: 1977-07-26
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Expires: 1995-04-24
Abstract
Abstract New substituted p-hydroxybenzoic acid phenyl esters are light protecting agents for polymers. They are prepared by acylation of a corrsponding phenol with an appropriate acid chloride.
Inventors
- 👤 Hanns Lind
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:42
CPC Classifications
C; C07; C07C; C07C69/00; C07C69/76; C07C69/84; C07C69/88
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
122 words
Compounds of the formula I ##STR20## in which R 1 denotes alkyl with 1 to 5 carbon atoms, cycloalkyl with 5 to 8 carbon atoms or aralkyl with 7 to 9 carbon atoms, R 2 denotes α-branched alkyl with 3 to 8 carbon atoms, cycloalkyl with 5 to 8 carbon atoms or aralkyl with 7 to 9 carbon atoms, R 3 and R 5 independently of one another denote alkyl with 1 to 8 carbon atoms, cycloalkyl with 5 to 8 carbon atoms, aralkyl with 7 to 9 carbon atoms, phenyl or chlorine and R 4 denotes hydrogen, alkyl with 1 to 18 carbon atoms, cycloalkyl with 5 to 8 carbon atoms, aralkyl with 7 to 9 carbon atoms, phenyl or chlorine.
Claim 2
Dependent Claim
122 words
Compounds of the formula I ##STR20## in which R 1 denotes alkyl with 1 to 5 carbon atoms, cycloalkyl with 5 to 8 carbon atoms or aralkyl with 7 to 9 carbon atoms, R 2 denotes α-branched alkyl with 3 to 8 carbon atoms, cycloalkyl with 5 to 8 carbon atoms or aralkyl with 7 to 9 carbon atoms, R 3 and R 5 independently of one another denote alkyl with 1 to 8 carbon atoms, cycloalkyl with 5 to 8 carbon atoms, aralkyl with 7 to 9 carbon atoms, phenyl or chlorine and R 4 denotes hydrogen, alkyl with 1 to 18 carbon atoms, cycloalkyl with 5 to 8 carbon atoms, aralkyl with 7 to 9 carbon atoms, phenyl or chlorine.
Claim 3
Dependent Claim
106 words
Compounds according to claim 1 of the formula I, in which R 1 denotes alkyl with 1 to 5 carbon atoms, R 2 denotes alkyl with 3 to 8 carbon atoms, with R 1 and R 2 together containing not more than 10 carbon atoms, R 3 and R 5 independently of one another denote alkyl with 1 to 8 carbon atoms, cycloalkyl with 6 to 8 carbon atoms, aralkyl with 7 or 8 carbon atoms or phenyl, and R 4 denotes hydrogen, alkyl with 1 to 12 carbon atoms, cycloalkyl with 6 to 8 carbon atoms, aralkyl with 7 - 8 carbon atoms, or phenyl.
Claim 4
Dependent Claim
62 words
Compounds according to claim 1 of the formula I, in which R 1 denotes alkyl with 1 to 4 carbon atoms, R 2 denotes alkyl with 3 and 4 carbon atoms, R 3 and R 5 independently of one another denote alkyl with 1 to 4 carbon atoms and R 4 denotes hydrogen, alkyl with 1 to 12 carbon atoms or cyclohexyl.
Claim 5
Dependent Claim
65 words
Compounds according to claim 1 of the formula I, in which R 1 denotes methyl, iso-propyl, sec.-butyl or tert.-butyl, R 2 denotes iso-propyl, sec.-butyl or tert.-butyl, R 3 and R 5 independently of one another denote methyl, iso-propyl, sec.-butyl, tert.-butyl, sec.-amyl, tert.-amyl, tert.-hexyl, tert.-octyl, cyclohexyl or α-methylbenzyl, and R 4 denotes hydrogen, methyl, iso-propyl, sec.-butyl, tert.-butyl, sec.-amyl tert.-amyl, tert.-hexyl, tert.-octyl, sec.-nonyl, tert.-dodecyl, cyclohexyl or α-methylbenzyl.
Claim 6
Dependent Claim
9 words
A compound according to claim 1 which is ##STR21##
Claim 7
Dependent Claim
9 words
A compound according to claim 1 which is ##STR22##
Claim 8
Dependent Claim
9 words
A compound according to claim 1 which is ##STR23##
Claim 9
Dependent Claim
9 words
A compound according to claim 1 which is ##STR24##
Claim 10
Dependent Claim
11 words
Composition comprising a compound of claim 1 and an organic polymer.
Claim 11
Dependent Claim
12 words
Composition according to claim 9, wherein the organic polymer is a polyolefine.
Claim 12
Dependent Claim
10 words
Composition according to claim 10, wherein the polyolefin is polypropylene.
Claim 13
Dependent Claim
10 words
Composition according to claim 10, wherein the polyolefin is polyethylene.
References Cited (Backward Citations)
US3502613A
Cited
US3843595A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-07-25 | 1981-01-24 | 1981-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-07-25 | 1985-01-24 | 1985-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-07-25 | 1989-01-24 | 1989-07-26 | $7700.00 | Window Closed / Lapsed |