Patent US4920169A successfully refreshed from Google Patents.
US4920169A
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Oxalic acid di(phenylamides) and use thereof as UV absorbers
Assignee: Sandoz AG
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Filing: 1989-05-26
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Granted: 1990-04-24
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Expires: 2009-05-26
Abstract
Abstract A compound of formula I ##STR1## in which each R 1 , independently is selected from hydrogen, C 1-12 alkyl, C 1-12 alkoxy and halogen; R 2 has a significance of R 1 , independently of R 1 , or is --OH; R 20 is --CO--OR 6 or, when each R 1 is hydrogen and R 2 is 2-C 1-4 alkoxy, R 20 is additionally --OH; R 3 is hydrogen or methyl (more preferably hydrogen); and R 6 is hydrogen; unsubstituted C 6-22 alkyl, uninterrupted or interrupted by 1 or 2 oxygen atoms or C 1-22 alkyl mono- or di-substituted by OH and uninterrupted or interrupted by 1 or 2 oxygen atoms; provided when each RF 1 and R 2 is hydrogen, then R 6 is not hydrogen.
Inventors
- 👤 Lajos Avar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:29
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/20; C09; C09D; C09D7/00; C09D7/40; C09D7/48
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
70 words
A compound of formula I ##STR18## in which each R 1 , independently, is selected from hydrogen, C 1-12 alkyl, C 1-12 alkoxy and halogen; R 2 is C 1-4 alkoxy; R 3 is hydrogen or methyl; and R 6 ' is unsubstituted C 6-18 alkyl, uninterrupted or interrupted by one --O-- group or C 1-18 alkyl mono-substituted by OH and uninterrupted or interrupted by 1 or 2 --O-- groups.
Claim 2
Dependent Claim
70 words
A compound of formula I ##STR18## in which each R 1 , independently, is selected from hydrogen, C 1-12 alkyl, C 1-12 alkoxy and halogen; R 2 is C 1-4 alkoxy; R 3 is hydrogen or methyl; and R 6 ' is unsubstituted C 6-18 alkyl, uninterrupted or interrupted by one --O-- group or C 1-18 alkyl mono-substituted by OH and uninterrupted or interrupted by 1 or 2 --O-- groups.
Claim 3
Dependent Claim
28 words
A compound according to claim 1, in which R 1 is R 1 ' where R 1 ' is hydrogen, C 1-4 alkyl, C 1-4 alkoxy or chlorine.
Claim 4
Dependent Claim
22 words
A compound according to claim 1, in which R 2 is R 2 ' where R 2 ' is C 1-2 alkoxy.
Claim 5
Dependent Claim
21 words
A compound according to claim 2 wherein R 2 is R 2 ' where R 2 ' is C 1-2 alkoxy.
Claim 6
Dependent Claim
55 words
A compound according to claim 2 wherein R 2 is R 2 ' where R 2 ' is C 1-2 alkoxy and R 6 ' is R 6 " where R 6 " is unsubstituted C 6-18 alkyl or C 1-6 alkyl monosubstituted by --OH and uninterrupted or interrupted by one or two --O-- groups.
Claim 7
Dependent Claim
103 words
A compound according to claim 2 wherein R 2 is R 2 ' where R 2 ' is C 1-2 alkoxy and R 6 ' is R 6 '" where R 6 '" is unsubstituted C 6-18 alkyl or C 2-6 hydroxyalkyl or a group --X--O--Y wherein X is C 2-4 alkylene, Y is C 1-4 alkyl, one of X and Y is substituted by hydroxy and the total number of carbon atoms in X and Y together is 4 to 6, provided that in the group OR 6 '" each pair of oxygen atoms is separated by at least two carbon atoms.
Claim 8
Dependent Claim
15 words
A compound according to claim 3 wherein R 2 ' is in the ortho position.
Claim 9
Dependent Claim
15 words
A compound according to claim 4 wherein R 2 ' is in the ortho position.
Claim 10
Dependent Claim
15 words
A compound according to claim 5 wherein R 2 ' is in the ortho position.
Claim 11
Dependent Claim
15 words
A compound according to claim 6 wherein R 2 ' is in the ortho position.
Claim 12
Dependent Claim
10 words
A compound according to claim 10 of the formula ##STR19##
Claim 13
Dependent Claim
14 words
A polymeric material containing a light-stabilizing amount of a compound according to claim 4.
Claim 14
Dependent Claim
14 words
A polymeric material containing a light-stabilizing amount of a compound according to claim 6.
Claim 15
Dependent Claim
50 words
A polymeric material according to claim 12 wherein the polymeric material is selected from the group consisting of polyethylene, polypropylene, ethylene/propylene copolymers, polyvinyl chloride, polyester, polyamide, polyurethane, polyacrylonitrile, poly(acrylonitrile-butadiene-styrene), terpolymers of acrylates, styrene and acylonitrile, styrene/acrylonitrile, styrene/butadiene, polymethylmethacrylate, polyphenylene oxide, polypropylene oxide, polyacetals, phenol/formaldehyde resins, epoxy resins and natural rubber.
Claim 16
Dependent Claim
24 words
A polymeric material according to claim 13 wherein the polymeric material is selected from the group consisting of polypropylene, polyethylene, ethylene/propylene copolymers and poly(acrylonitrile-butadiene-styrene).
Claim 17
Dependent Claim
40 words
A compound according to claim 1, in which R 6 is R 6 ' where R 6 " is unsubstituted C 6-18 alkyl or C 1-6 alkyl monosubstituted by --OH and uninterrupted or interrupted by one or two --O-- groups.
Claim 18
Dependent Claim
26 words
A process for stabilising a polymeric substrate comprising adding a light stabilising amount of a compound of formula I according to claim 1, to the substrate.
Claim 19
Dependent Claim
88 words
A compound according to claim 1 wherein R 6 ' is R 6 '" where R 6 '" is unsubstituted C 6-18 alkyl or C 2-6 hydroxyalkyl or a group --X--O--Y wherein X is C 2-4 alkylene, Y is C 1-4 alkyl, one of X and Y is substituted by hydroxy and the total number of carbon atoms in X and Y together is 4 to 6, provided that in the group OR 6 '" each pair of oxygen atoms is separated by at least two carbon atoms.
Claim 20
Dependent Claim
21 words
A polymeric material to which a light-stabilizing amount of a compound of formula I defined in claim 1, has been added.
Claim 21
Dependent Claim
24 words
A lacquer composition based on acrylic, alkyd or polyester resins containing a light-stabilizing amount of a compound of formula I defined in claim 1.
References Cited (Backward Citations)
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1993-04-23 | 1993-10-23 | 1994-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-04-23 | 1997-10-23 | 1998-04-24 | $3760.00 | Window Closed / Lapsed |
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