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.
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
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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
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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
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Composition according to claims 1-4, characterized in that it has a pH of 10-12.5.
Claim 7
Dependent Claim
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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).