EP0098021A2
Expired / Lapsed
EP
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Bleaching compositions
Assignee: Procter and Gamble Co
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Filing: 1983-06-23
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Granted: —
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Expires: 2003-06-23
Abstract
Abstract This invention relates to bleaching compositions that provide effective and efficient surface bleaching of textiles over a wide range of bleach solution temperatures. Surface bleaching of textiles is bleaching wherein the bleaching mechanism takes place on the textile surface and thereby, removes stains and or soils. The bleaching compositions within the invention contain peroxygen bleaches capable of yielding hydrogen peroxide in aqueous solutions and specific bleach activators at specific molar ratios of hydrogen peroxide to bleach activator. In a highly preferred embodiment the bleaching compositions within the invention are detergent compositions.
Inventors
- 👤 Stanley Yat-Ming Chung
- 👤 Gianfranco L. Spadini
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-31 22:01
CPC Classifications
C; C11; C11D; C11D7/00; C11D3/00; C11D3/39; C11D3/3902; C11D3/3905; C11D3/3907
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
101 words
A bleaching composition comprising: (a) a peroxygen bleaching compound capable of yielding hydrogen peroxide in an aqueous solution; and (b) a bleach activator having the general formula: wherein R is an alkyl group containing from 5 to 18 carbon atoms wherein the longest linear alkyl chain extending from and including the carbonyl carbon contains from 6 to 10 carbon atoms and L is a leaving group, the conjugate acid of which has a pK a in the range of from 6 to 13; wherein the molar ratio of hydrogen peroxide yielded by (a) to bleach activator (b) is greater than 1.5.
Claim 2
Dependent Claim
101 words
A bleaching composition comprising: (a) a peroxygen bleaching compound capable of yielding hydrogen peroxide in an aqueous solution; and (b) a bleach activator having the general formula: wherein R is an alkyl group containing from 5 to 18 carbon atoms wherein the longest linear alkyl chain extending from and including the carbonyl carbon contains from 6 to 10 carbon atoms and L is a leaving group, the conjugate acid of which has a pK a in the range of from 6 to 13; wherein the molar ratio of hydrogen peroxide yielded by (a) to bleach activator (b) is greater than 1.5.
Claim 3
Dependent Claim
24 words
A composition according to Claim 1 wherein the molar ratio of hydrogen peroxide yielded by (a) to bleach activator (b) is at least 2.0.
Claim 4
Dependent Claim
38 words
A composition according to either one of Claims 1 or 2 wherein the peroxygen bleaching compound is selected from sodium perborate monohydrate, sodium perborate tetrahydrate, sodium carbonate peroxyhydrate, sodium pyrophosphate peroxyhydrate, urea peroxyhydrate, sodium peroxide and mixtures thereof.
Claim 5
Dependent Claim
37 words
A composition according to any one of Claims 1-3 wherein L is a leaving group, the conjugate acid of which has a pK a in the range of from 7 to 11, preferably from 8 to 11.
Claim 6
Dependent Claim
51 words
A composition according to any one of Claims 1-4 wherein L is selected from: wherein R is as defined in Claim 1, R 2 is an alkyl chain containing from 1 to 8 carbon atoms, R 3 is H or R 2 , and Y is H or a solubilizing group.
Claim 7
Dependent Claim
90 words
A composition according to any one of Claims 1-5 wherein Y is selected from -SO - 3 M + , -COO M + , -SO - 4 M + , -N + (R 4 ) 3 X - and -N(R 4 ) 2 →O and mixtures thereof wherein R 4 is an alkyl chain containing from 1 to 4 carbon atoms, M is a cation which provides solubility to the bleach activator preferably sodium, potassium or mixtures thereof and X is an anion which provides solubility to the bleach activator.
Claim 8
Dependent Claim
21 words
A composition according to any one of claims 1-6 wherein L has the general formula: wherein M is sodium or potassium.
Claim 9
Dependent Claim
42 words
A composition according to any one of Claims 1-7 wherein R is an alkyl group containing from 5 to 12 carbon atoms wherein the longest linear alkyl chain extending from and including the carbonyl carbon contains from 6 to 10 carbon atoms.
Claim 10
Dependent Claim
24 words
A composition according to Claim 8.wherein R is a linear alkyl chain containing from 5 to 9 preferably from 6 to 10 carbon atoms.
Claim 11
Dependent Claim
40 words
A bleaching composition according to any one of Claims 1-9 comprising, by weight: (a) from 1% to 60% of the peroxygen bleaching compound; (b) from 0.5% to 40% of the bleach.activator; (c) from 1% to 30% of a detergent surfactant.
Claim 12
Dependent Claim
17 words
ll. A composition according to Claim 10 further containing from 10% to 60% of a detergency builder.
References Cited (Backward Citations)
No citation records indexed.
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