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EP0524762A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Perfumed liquid abrasive cleaning composition

Assignee: Unilever PLC
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Filing: 1992-07-14
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Granted: —
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Expires: 2012-07-14
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Abstract

Abstract Problems of stability have bedeviled formulations of aqueous, liquid abrasive cleaning compositions comprising soluble abrasive particles. One factor which can influence the stability of aqueous compositions is the high level of electrolyte present in the compositions: ie. the soluble abrasive is typically immersed in an aqueous medium which is saturated with respect to that abrasive in solution. The electrolyte level varies with temperature and this can have detrimental effects on the product. We have now determined that these problems can be overcome by use of an essentially hydrophobic perfume composition as a stability enhancer in a pourable, aqueous, hard surface cleaning composition comprising water-soluble abrasive. Consequently, the present invention provides a pourable, aqueous, hard-surface cleaning composition comprising a water soluble abrasive, at least part of the abrasive being present as undissolved particles having a mean particle diameter of from 10 to 500 microns, further comprising and essentially hydrophobic perfume composition and a detergent, said composition remaining stable after storage at 37°C for twelve weeks or remaining stable after twelve temperature cycles from -5°C for eight hours to 25°C for sixteen hours.

Inventors

  • 👤 Terry Unilever Research Instone
  • 👤 David Philip Unilever Research Jones
  • 👤 Kenneth Leslie Unilever Research Rabone
  • 👤 May Unilever Research Shana'a

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-10-28 21:12
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/50; C11D7/00; C11D7/02; C11D7/04; C11D17/00; C11D17/0008; C11D17/0013

Claims Analysis

Total Claims: 13
Claim 1
Independent Claim 22 words
Use of an essentially hydrophobic perfume composition as a stability enhancer in a pourable, aqueous, hard surface cleaning composition comprising water-soluble abrasive.
Claim 2
Dependent Claim 22 words
Use of an essentially hydrophobic perfume composition according to claim 1, wherein the level of perfume ranges from 0.1-10%wt on total composition.
Claim 3
Dependent Claim 37 words
Use of an essentially hydrophobic perfume composition according to claim 1 or 2, wherein the water soluble abrasive includes at least one compound selected from sodium hydrogen carbonate, potassium sulphate, sodium triphosphate hexahydrate and sodium tetraborate decahydrate.
Claim 4
Dependent Claim 29 words
Use of an essentially hydrophobic perfume composition according to claim 1, 2 or 3 wherein the water soluble abrasive is present at a level of 6-75wt% on total composition.
Claim 5
Dependent Claim 20 words
Use according to claim 4 wherein the water soluble abrasive is present at a level of 6-45wt% on total composition.
Claim 6
Dependent Claim 70 words
Pourable, aqueous, hard-surface cleaning composition comprising a water soluble abrasive, at least part of the abrasive being present as undissolved particles having a mean particle diameter of from 10 to 500 microns, further comprising and essentially hydrophobic perfume composition and a detergent, said composition remaining stable after storage at 37°C for twelve weeks or remaining stable after twelve temperature cycles from -5°C for eight hours to 25°C for sixteen hours.
Claim 7
Dependent Claim 136 words
Composition according to claim 6 comprising: i) at least 0.1%wt of an essentially hydrophobic, perfume composition; ii) 1.5 to 30%wt of detergent active component, and; iii) a water soluble salt, in a quantity such that at 20°C at least 5% by weight of the overall composition comprises undissolved particles of said salt, said particles having a mean particle diameter of from 10 to 500 microns, said salt comprising not more than a single hydrated species when present as a crystalline solid in water at a temperature of from 10 to 40°C in an amount above that required to form a saturated solution, said salt having a saturation solubility in water at 40°C which is less than ten times that at 10°C, and said salt having a solubility in water of at least 1.2 g/l at 10°C.
Claim 8
Dependent Claim 43 words
Composition according to claim 7 having a viscosity at 20°C of at least 6500 Pas at a shear rate of 3 x 10-5 sec-1 and not more than 10 Pas at a shear rate of 21 sec-1 as measured with a rotational viscometer.
Claim 9
Dependent Claim 13 words
Composition according to claim 7 comprising 6-45wt% of the water soluble salt (iii).
Claim 10
Dependent Claim 37 words
Composition according to claim 7 comprising 45-75wt% of the water soluble salt (iii) said salt being present as particles having a volume distribution diameter and span of less than 80 microns and between 1 and 3 respectively.
Claim 11
Dependent Claim 28 words
Composition according to any one of claims 6-10 wherein the salt is selected from the group comprising sodium bicarbonate, sodium triphosphate hexahydrate, sodium tetraborate decahydrate and mixtures thereof.
Claim 12
Dependent Claim 11 words
Composition according to claim 11 wherein the salt is sodium bicarbonate.
Claim 13
Dependent Claim 114 words
Pourable, aqueous, hard-surface cleaning composition having a viscosity at 20°C of at least 6500 Pas at a shear rate of 3 x 10⁻⁵ sec⁻¹ and not more than 10 Pas at a shear rate of 21 sec⁻¹ as measured with a rotational viscometer, said composition comprising: i) 0.1-2wt% of an essentially hydrophobic, perfume composition, ii) 4-20wt% of detergent active component, comprising a mixture of non-ionic and anionic surfactants in a ratio of 1:10 to 10:1, and, iii) sodium bicarbonate, in a quantity such that at 20°C at least 5% by weight of the overall composition comprises undissolved particles of said salt, said particles having a mean particle diameter of from 10 to 500 microns.

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