Patent US1690470A successfully refreshed from Google Patents.
EP0051983A1
Expired / Lapsed
EP
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A fabric softening composition and a process for preparing it
Assignee: Unilever PLC
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Filing: 1981-11-05
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Granted: —
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Expires: 2001-11-05
Abstract
Abstract A rinse conditioner containing cationic surfactant and optionally other surfactants or fatty materials is prepared to relatively high viscosity at which it is stable. The process step necessary to achieve this is first to prepare a relatively mobile dispersion of the active materials and to thicken this mobile dispersion with a nonionic or weakly anionic thickener. Examples of such thickeners are guar gum, polyvinylacetate and polyacrylamide.
Inventors
- 👤 John Albert Hockey
- 👤 Malcolm Arthur Shaw
- 👤 John Leslie Wilby
- 👤 Allan Arthur Wilson
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 13:04
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/16; C11D3/37; C11D3/3746; C11D3/3753; C11D3/0005; C11D3/001; C11D3/0015; C11D3/20; C11D3/22; C11D3/222; C11D3/3769; C11D3/3773
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
54 words
A process for the manufacture of a fabric softening composition having a defined final viscosity, characterised by sequentially or simultaneously, (i) forming an aqueous dispersion comprising a cationic surfactant having a viscosity less than the final viscosity; and (ii) thickening the composition to the final viscosity with a nonionic or weakly anionic polymeric thickener.
Claim 2
Dependent Claim
54 words
A process for the manufacture of a fabric softening composition having a defined final viscosity, characterised by sequentially or simultaneously, (i) forming an aqueous dispersion comprising a cationic surfactant having a viscosity less than the final viscosity; and (ii) thickening the composition to the final viscosity with a nonionic or weakly anionic polymeric thickener.
Claim 3
Dependent Claim
17 words
A process according to claim 1 characterised in that the polymeric thickener comprises guar gum or polyvinylacetate.
Claim 4
Dependent Claim
37 words
A process according to claim 1 or claim 2 characterised in that the polymeric thickener comprises a polyacrylamide or a mixture of guar gum and xanthan gum containing no more than 10% by weight of xanthan gum.
Claim 5
Dependent Claim
34 words
A process according to any one of the preceding claims characterised in that the defined viscosity is at least 70 centipoise measured at a temperature of 25°C and a shear rate of 110 sees
Claim 6
Dependent Claim
36 words
A process according to any one of the preceding claims characterised in that stage (i) of the process is performed by heating the dispersion to a temperature above the melting point of the surfactant and stirring.
Claim 7
Dependent Claim
29 words
A process according to any one of the preceding claims characterised in that stage (i) of the process is performed by forming the dispersion in a high shear mixer.
Claim 8
Dependent Claim
48 words
A fabric softening composition comprising an aqueous dispersion of a cationic surfactant characterised by being thickened with a nonionic or weakly anionic polymeric thickener having a viscosity of 70 centipoise or more measured at a temperature of 25°C and at a shear rate of 110 secs -1 .
Claim 9
Dependent Claim
48 words
A fabric softening composition comprising an aqueous dispersion of a cationic surfactant characterised by being thickened with a nonionic or weakly anionic polymeric thickener having a viscosity of 70 centipoise or more measured at a temperature of 25°C and at a shear rate of 110 secs -1 .
Claim 10
Dependent Claim
29 words
A fabric softening composition according to claim 7 characterised in that the polymeric thickener is present in an amount of from 0.05 to 0.3% by weight of the composition.
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