EP0464880A1
Expired / Lapsed
EP
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Bleaching composition
Assignee: Unilever PLC
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Filing: 1991-05-28
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Granted: —
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Expires: 2011-05-28
Abstract
Abstract Novel cationic nitriles, methods of preparing such nitriles and use thereof as cationic peroxyacid bleach precursor in bleaching (detergent) compositons are disclosed. The novel cationic nitriles are non-hygroscopic and are characterized in that they have a counter-anion X-selected from the group consisting of 1) R-SO 3 -, 2) R-SO 4 -, 3) R-CO 2 -, wherein R is a straight or branched chain, optionally substituted, alkyl, alkylether or alkylene group containing 4 to 20 carbon atoms, or a phenyl or alkyl phenyl group containing 6 to 20 carbon atoms, and 4) any other surfactant anion not falling under the groups 1), 2) and 3).
Inventors
- 👤 Christopher John Adams
- 👤 Stephen Alan Unilever Research U.S. Inc Madison
- 👤 John Oakes
- 👤 David William Thornthwaite
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 12:10
CPC Classifications
G; G11; G11C; G11C11/00; G11C11/21; G11C11/34; G11C11/40; G11C11/401; C; C11; C11D; C11D3/00; C11D3/39; C11D3/3902; C11D3/3905; C11D3/3907; C11D3/3917; C11D3/3925; C07; C07C; C07C255/00; C07C255/01; C07C255/24; C07C255/25; C07C255/32; C07C255/42
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
155 words
A cationic nitrile having the general formula: wherein R 1 and R 2 are each individually H, or a substituent group containing at least one carbon atom; R' is a straight or branched chain C 1 -C 24 alkyl, alkenyl or alkylether group, or -CR 1 R 2 CN; R" and R''' are each individually a C 1 -C 4 alkyl or hydroxyalkyl group; or R" can also be a group having the formula wherein n is an integer from 1 to about 4; and X- is counter-anion selected from the group consisting of 1) R-SO 3 -, 2) R-SO 4 -, 3) R-C0 2 -, wherein R is a straight or branched chain, optionally substituted, alkyl, alkylether or alkylene group containing 4 to 20 carbon atoms, or a phenyl or alkyl phenyl group containing 6 to 20 carbon atoms, and 4) any other surfactant anion not falling under the groups 1), 2) and 3).
Claim 2
Dependent Claim
155 words
A cationic nitrile having the general formula: wherein R 1 and R 2 are each individually H, or a substituent group containing at least one carbon atom; R' is a straight or branched chain C 1 -C 24 alkyl, alkenyl or alkylether group, or -CR 1 R 2 CN; R" and R''' are each individually a C 1 -C 4 alkyl or hydroxyalkyl group; or R" can also be a group having the formula wherein n is an integer from 1 to about 4; and X- is counter-anion selected from the group consisting of 1) R-SO 3 -, 2) R-SO 4 -, 3) R-C0 2 -, wherein R is a straight or branched chain, optionally substituted, alkyl, alkylether or alkylene group containing 4 to 20 carbon atoms, or a phenyl or alkyl phenyl group containing 6 to 20 carbon atoms, and 4) any other surfactant anion not falling under the groups 1), 2) and 3).
Claim 3
Dependent Claim
38 words
A cationic nitrile according to Claim 1, wherein the substituent R 1 or R 2 is a straight or branched chain C 1 -C 8 alkyl, alkenyl or alkylether; phenyl; C 1 -C 3 -alkylphenyl; or pyridyl group.
Claim 4
Dependent Claim
20 words
A cationic nitrile according to Claim 2, wherein R 1 and R 2 are each individually H, methyl or phenyl.
Claim 5
Dependent Claim
35 words
A cationic nitrile according to Claim 1, 2 or 3, wherein R' is C 1 -C 4 alkyl or -CR 1 R 2 CN group; R" and R''' are each C 1 -C 4 alkyl.
Claim 6
Dependent Claim
15 words
A cationic nitrile according to Claim 4, wherein R', R" and R''' are methyl groups.
Claim 7
Dependent Claim
43 words
A cationic nitrile according to any of the above Claims 1-5, wherein the counter-anion X- is selected from alkane and paraffin sulphonates; p-toluene sulphonate; dodecyl benzene sulphonate; C 12 -C 18 primaryalcohol sulphate; laurylether sulphate; and C 8 -C 18 alkylcarboxylic acid anions.
Claim 8
Dependent Claim
15 words
A cationic nitrile according to Claim 6, wherein the counter-anion is a p-toluene sulphonate ion.
Claim 9
Dependent Claim
25 words
A bleaching (detergent) composition comprising a peroxide bleach compound and a cationic peroxyacid bleach precursor, wherein said precursor is a cationic nitrile of Claims 1-7.
Claim 10
Dependent Claim
35 words
A composition according to Claim 8, wherein said precursor comprises an intimate mixture of a cationic nitrile and a sodium salt of RSO 3 - , RSO 4 - , RC0 2 - or surfactant.
Claim 11
Dependent Claim
36 words
A composition according to Claim 8 or 9, wherein the molar ratio of peroxide to cationic nitrile is from 2:1 to 20:1 and the composition has a 1-5 g/I solution pH of from 8 to 12.
Claim 12
Dependent Claim
24 words
A composition according to Claim 10, wherein said molar ratio is from 5:1 to 12:1 and said solution pH is from 8.5 to 10.5.
Claim 13
Dependent Claim
13 words
A composition according to Claim 11, wherein said solution pH is ≧ 9.
Claim 14
Dependent Claim
21 words
A composition according to Claims 8-12, which further comprises a surface-active material at a level of up to 50% by weight.
Claim 15
Dependent Claim
53 words
A composition according to Claim 13, comprising: (a) from 1 to 40% by weight of a surface-active material; (b) from 5 to 80% by weight of a detergency builder; (c) from 2 to 40% by weight of a peroxide bleach compound; and (d) from 0.1 to 20% by weight of a cationic nitrile.
References Cited (Backward Citations)
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