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EP0030401A1 Expired / Lapsed EP ⏱️ 0.0 years remaining

Liquid, thickened chlorine bleaching composition

Assignee: Unilever PLC
•
Filing: 1980-11-13
•
Granted: —
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Expires: 2000-11-13
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Abstract

Abstract In liquid, pourable, thickened chlorine bleaching compositions, in which the thickening is produced by at least two different detergent active compounds, a buffer salt is included to improve their stability at lower chlorine levels and at reduced pH values. Typically, a composition comprises an aqueous solution of alkalimetal hypochlorite, thickened by means of a tertiary amine oxide and a saturated fatty acid soap, and contains an alkali-metal orthophosphate buffer system, at a chlorine content of 1-10% and a pH of 10-12.5. The compositions are useful in bleaching operations, especially in bleaching hard surfaces such as toilets, tiles, kitchen sinks etc.

Inventors

  • 👤 Ulrich Schilp

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-05 04:51
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/395; C11D3/3958; C11D3/3953; C11D3/3956; C11D1/00; C11D1/66; C11D1/75

Claims Analysis

Total Claims: 8
Claim 1
Independent Claim 77 words
Liquid, thickened chlorine bleaching composition which is substantially free from insoluble, solid abrasive or clay particles, based on an aqueous alkali-metal hypochlorite solution which has been thickened by means of a mixture of two different detergent active compounds to a viscosity of abt. 10 to 150 cS, characterized in that it has a content of active chlorine of 1 to 10% by weight and contains a buffer salt of a strong base and a weak inorganic acid.
Claim 2
Dependent Claim 77 words
Liquid, thickened chlorine bleaching composition which is substantially free from insoluble, solid abrasive or clay particles, based on an aqueous alkali-metal hypochlorite solution which has been thickened by means of a mixture of two different detergent active compounds to a viscosity of abt. 10 to 150 cS, characterized in that it has a content of active chlorine of 1 to 10% by weight and contains a buffer salt of a strong base and a weak inorganic acid.
Claim 3
Dependent Claim 19 words
Composition according to claim 1, characterized in that it has a content of active chlorine of 1-2.5% by weight.
Claim 4
Dependent Claim 22 words
Composition according to claim 1 or 2, characterized in that it contains at least 50 mmol/kg (of the composition) of the salt.
Claim 5
Dependent Claim 20 words
Composition according to claims 1-3, characterized in that the salt is a mixture of trialkalimetal orthophosphate and di- alkalimetal orthophosphate.
Claim 6
Dependent Claim 14 words
Composition according to claims 1-4, characterized in that it has a pH of 10-12.5.
Claim 7
Dependent Claim 21 words
Composition according to claims 1-5, characterized in that it contains an additional amount of 0.1-15% by weight of a strong electrolyte.
Claim 8
Dependent Claim 44 words
Composition according to claims 1-6, characterized in that the weight ratio of the detergent active substances in the thickening agent, of which at least one should be soluble in hypochlorite; varies from 75:25 to 40:60 (hypochlori-te-soluble detergent active substance to other detergent active substance).

References Cited (Backward Citations)

US3491028A Cited
GB1466560A Cited
GB2003522A Cited
DE2849225A1 Cited
US4151104A Cited

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