US3683020A Expired / Lapsed US ⏱️ 0.0 years remaining

Bis-oxalic acid diamides for use as stabilizers

Assignee: Novartis AG

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Filing: 1968-04-02

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Granted: 1972-08-08

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Expires: 1988-04-02

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Abstract

Abstract The present invention relates to certain novel bis-oxalic acid diamide derivatives which are especially useful as ultraviolet absorbers for organic materials. Said new bis-oxalic acid diamides correspond to the formula

Inventors

👤 Christian Luethi
👤 Hans-Rudolf Biland
👤 Max Duennenberger

Bibliographic Details

Application Number —

Jurisdiction US

Data Source google_patents

Last Synchronized 2026-10-27 15:33

CPC Classifications

C; C09; C09K; C09K15/00; C09K15/04; C09K15/20; C09K15/22; C08; C08K; C08K5/00; C08K5/16; C08K5/20

Claims Analysis

Total Claims: 11

Claim 1

Independent Claim 73 words

A bis-oxalic acid diamide of the formula according to claim 2 wherein A2 each represents a phenyl group or a phenyl group substituted by one to two alkyl groups with one to six carbon atoms or alkoxy groups with one to eight carbon atoms and B2 represents an alkylene group having one to 12 carbon atoms interrupted by one -NH- or -N(alkyl)- group with one to four carbon atoms in the alkyl part.

Claim 2

Dependent Claim 145 words

A bis-oxalic acid diamide of the formula according to claim 2 wherein B2 represents (a) phenylene or phenylene substituted by one to two chloro atoms, alkyl or alkoxy groups with one to four carbon atoms each, (b) naphthylene, (c) diphenylene or diphenylene substituted by one to two alkyl or alkoxy groups containing one to four carbon atoms, or (d) wherein Z denotes hydrogen or an alkyl group containing one to four carbon atoms, and X represents methylene or methylene substituted by one to two alkyl groups having a total of up to three carbon atoms or a bridge member -O-, -S-, -NH- or -SO2-, and A2 represents a 2-methallyl group, an alkyl group having one to 18 carbon atoms, a dialkylaminoalkyl group with up to eight carbon atoms for each alkyl, a morpholino-alkyl (1-4 C) group, a phenyl-alkyl (1-4 C) group or an amino group.

Claim 3

Dependent Claim 15 words

A bis-oxalic acid diamide according to claim 2 of formula wherein B2 represents a group

Claim 4

Dependent Claim 74 words

A bis-oxalic acid diamide according to claim 2 of formula wherein B2 represents an alkylene group having one to 12 carbon atoms or an alkylene group having one to 12 carbon atoms interrupted by one -NH- or -N(alkyl)- group with one to four carbon atoms in the alkyl part, and R3 denotes a hydrogen atom, An alkoxy group containing one to eight carbon atoms or an alkyl group containing one to six carbon atoms.

Claim 5

Dependent Claim 71 words

A bis-oxalic acid diamide according to claim 2 of formula wherein Z2 denotes a hydrogen atom, a methyl or methoxy group and A2 denotes an alkyl group containing one to 18 carbon atoms, a 2-methallyl group, an aralkyl group containing a benzene radical and an alkyl part containing one to four carbon atoms, a dialkylaminoalkyl group with up to 8 carbon atoms for each alkyl or a morpholino-alkyl (1-4 C) group.

Claim 6

Dependent Claim 10 words