EP0240315A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Bleaching composition
Assignee: Kao Corp
•
Filing: 1987-03-31
•
Granted: —
•
Expires: 2007-03-31
Abstract
Abstract A bleaching composition comprises (a) an inorganic peroxide, (b) a nonionic surfactant and (c) a polymer of the following general formula (I), a copolymer comprising a monomer unit of the general formula (I) or a water-soluble salt thereof: wherein X, Y and Z represent each -H, -CH₃ -COOM, -CH₂COOM or -OH, M represents H, an alkali metal or a mixture of them and n represents a number of at least 2.
Inventors
- 👤 Muneo Aoyagi
- 👤 Atsuo Nakae
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-24 10:21
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/395; C11D3/39; C11D3/3942; C11D3/16; C11D3/37; C11D3/3746; C11D3/3757; C11D3/3761
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
71 words
A bleaching composition comprising (a) an inorganic peroxide, (b) a nonionic surfactant and (c) a polymer of the following general formula (I), a copolymer comprising a monomer unit of the general formula (I) or a water-soluble salt thereof: wherein X, Y, and Z represent each -H, -CH₃, -COOM, -CH₂COOM or -OH, M represents H, an alkali metal or a mixture of them and n represents a number of at least 2.
Claim 2
Dependent Claim
71 words
A bleaching composition comprising (a) an inorganic peroxide, (b) a nonionic surfactant and (c) a polymer of the following general formula (I), a copolymer comprising a monomer unit of the general formula (I) or a water-soluble salt thereof: wherein X, Y, and Z represent each -H, -CH₃, -COOM, -CH₂COOM or -OH, M represents H, an alkali metal or a mixture of them and n represents a number of at least 2.
Claim 3
Dependent Claim
43 words
A bleaching composition according to Claim 1, wherein the inorganic peroxide is a compound or a mixture of compounds selected from the group consisting of percarbonates, perborates, Glauber's salt / common salt / H₂O₂ adducts, urea / H₂O₂ / gypsum adducts and 2KHSO₅·K₂SO₄·KHSO₄.
Claim 4
Dependent Claim
25 words
A bleaching composition according to Claim 1 or 2, wherein said polymer, copolymer or water-soluble salt thereof has a molecular weight of 200 to 100,000.
Claim 5
Dependent Claim
33 words
A bleaching composition according to any of Claims 1 to 3, wherein the monomer unit of the general formula (I) is an alkali metal acrylate, methacrylate, fumarate, maleate, 2-hydroxyacrylate, itaconate, aconitate or citraconate.
Claim 6
Dependent Claim
61 words
A bleaching composition according to any of Claims 1 to 4, wherein said copolymer or its water-soluble salt is a copolymer of one or more compounds selected from the group consisting of ethylene, vinyl acetate, vinylpyrrolidone, methyl vinyl ether styrene, pentene, isobutylene, diisobutylene and butadiene with a monomer unit of the general formula (I) or a water-soluble salt of said copolymer.
Claim 7
Dependent Claim
16 words
A bleaching composition according to any of Claims 1 to 5, which further contains a protease.
Claim 8
Dependent Claim
36 words
A bleaching composition according to Claim 1, which comprises 40 to 95 wt.% of (a) the inorganic peroxide, 0.1 to 10 wt.% of (b) the nonionic surfactant and 0.05 to 10 wt.% of (c) the polymer.
Claim 9
Dependent Claim
86 words
A process for the preparation of a bleaching composition comprising (a) an inorganic peroxide, (b) a nonionic surfactant and (c) a polymer of the following general formula (I), a copolymer comprising a monomer unit of the general formula (I) or a water-soluble salt thereof: wherein X,Y and Z represent each -H, -CH₃, -COOM, -CH₂COOM or -OH, M represents H, an alkali metal or a mixture of them and n represents a number of at least 2 which process comprises blending together components (a), (b), and (c).
Claim 10
Dependent Claim
86 words
A process for the preparation of a bleaching composition comprising (a) an inorganic peroxide, (b) a nonionic surfactant and (c) a polymer of the following general formula (I), a copolymer comprising a monomer unit of the general formula (I) or a water-soluble salt thereof: wherein X,Y and Z represent each -H, -CH₃, -COOM, -CH₂COOM or -OH, M represents H, an alkali metal or a mixture of them and n represents a number of at least 2 which process comprises blending together components (a), (b), and (c).
Claim 11
Dependent Claim
26 words
A process according to claim 8, wherein the inorganic peroxide (a) is sodium percarbonate prepared by reacting sodium carbonate with aqueous hydrogen peroxide, followed by crystallisation.
Claim 12
Dependent Claim
40 words
A process according to claim 9, wherein the polymer (c) is added as a powder or aqueous solution to the inorganic peroxide (a) in the dry state, and the resulting mixture is dried or blended with the non-ionic surfactant (b).
Claim 13
Dependent Claim
52 words
A process according to claim 9, wherein polymer (c) in the form of a powder or an aqueous solution and the non-ionic surfactant (b) in the dry state are added to the inorganic peroxide (a) in which has not been dried, and the resulting mixture granulated in the presence of a binder.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.