Patent EP0199385A2 successfully refreshed from Google Patents.
EP0199385A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Liquid bleaching compositions
Assignee: Unilever PLC
•
Filing: 1986-03-20
•
Granted: —
•
Expires: 2006-03-20
Abstract
Abstract The invention pertains to an aqueous stable thickened low-pH bleaching composition which comprises a thickening synthetic anionic surfactant of the sulphonic acid or salt type, a cold-water-soluble inorganic peroxy compound, in particular peroxymonosulphate, and a mineral acid to yield a pH of below 4.
Inventors
- 👤 Colin Overton
- 👤 Phillip Eugene Figdore
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-24 11:58
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/02; C11D3/04; C11D3/042; C11D3/39; C11D3/3947
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
58 words
Aqueous stable thickened low-pH bleaching composition, characterized in that it comprises: (a) a thickening synthetic anionic surfactant selected from the group consisting of alkyl-, alkenyl-and alkylaryl sulphonic acids, -polyglycolether sulphonic acids, and the salts thereof; (b) a cold-water-soluble inorganic peroxy compound; and (c) an acidic compound capable of providing the composition with a pH value of below 4.
Claim 2
Dependent Claim
58 words
Aqueous stable thickened low-pH bleaching composition, characterized in that it comprises: (a) a thickening synthetic anionic surfactant selected from the group consisting of alkyl-, alkenyl-and alkylaryl sulphonic acids, -polyglycolether sulphonic acids, and the salts thereof; (b) a cold-water-soluble inorganic peroxy compound; and (c) an acidic compound capable of providing the composition with a pH value of below 4.
Claim 3
Dependent Claim
21 words
A composition according to claim 1, wherein the peroxy compound is peroxymonosulphuric acid or an alkali metal or ammonium salt thereof.
Claim 4
Dependent Claim
25 words
A composition according to claim 1, wherein the peroxy compound is included in an amount of 0.5 to 10% by weight of the total composition.
Claim 5
Dependent Claim
21 words
A composition according to any one of the preceding claims, which further comprises 1 to 5% by weight of hydrogen peroxide.
Claim 6
Dependent Claim
33 words
A composition according to any one of the preceding claims, wherein the thickening surfactant is selected from the group of alkylaryl sulphonates having from 9 to 20 carbon atoms in the alkylaryl radical.
Claim 7
Dependent Claim
53 words
A composition according to any one of the preceding claims, wherein the thickening surfactant is selected from the group of alkylaryl polyglycolether sulphonates having from 8 to 18 carbon atoms in the alkylaryl radical and from 1 to 4 carbon atoms in the alkyl linkage between the polyglycol portion and the sulphonate group.
Claim 8
Dependent Claim
20 words
A composition according to any one of the preceding claims, which comprises from 1 to 7.5% of the thickening surfactant.
Claim 9
Dependent Claim
21 words
A composition according to any one of the preceding claims, which further comprises up to 5% by weight of a co-surfactant.
Claim 10
Dependent Claim
31 words
A composition according to claim 8, wherein the co-surfactant is an alkoxylated primary or secondary fatty alcohol, the weight ratio between the thickening surfactant and the co-surfactant being at least 1:1.
Claim 11
Dependent Claim
36 words
A composition according to any one of the preceding claims, which comprises 0.5 to 20% by weight of an acidic compound which is selected from the group of strong mineral acids and the partial salts thereof.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.