Relation to the manufacture of personal cleansing compositions
AssigneeThos. Bentley & Son Limited
InventorJohn Michael Story
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Abstract
The invention relates to a method of making solid cleansing compositions which comprise a non-soap anionic surfactant, a carrier, an emulsifier and water. The method entails preparing an emulsion of the components at an elevated temperature using excess water and subjecting the emulsion to cooling and solidification, wherein the water content is reduced. The invention further relates to the emulsions and to the novel solid cleansing compositions formed therefrom.
Claims28
A method of making a solid cleansing composition, the composition comprising:
- a. at least 15% wt of a non-soap anionic surfactant having a melting point of at least 45° C.;
- b. at least 10% wt of a carrier having a melting point of at least 45° C.;
- c. at least 3% wt of an emulsifier;
- and
- d. at least 7% wt water;
- wherein the composition is a solid throughout the range from 0° C. to 40° C.;
- wherein the composition does not contain soap;
- wherein the carrier (b) is a triglyceride;
- wherein the emulsifier, component (c), has an HLB value of up to 12;
- wherein when two or more emulsifiers are present, the HLB is a weighted average taking into account the individual HLB values and amounts of the two or more emulsifiers;
- and
- wherein the method comprises:
- (i) preparing an emulsion containing the components (a) to (d), but with a greater mass of water present than in the solid cleaning composition, the temperature of the emulsion being at least 45° C.,
- (ii) subjecting the emulsion to cooling and solidification, wherein the water content is reduced during the cooling and solidification to produce the solid cleansing composition having components (a) to (d) in the amounts defined.
A solid cleansing composition which comprises:
- (a) at least 15% wt of a non-soap anionic surfactant having a melting point of at least 45° C.;
- (b) at least 10% wt of a carrier having a melting point of at least 45° C.;
- (c) at least 3% wt of an emulsifier;
- and
- (d) at least 7% wt water;
- wherein the composition is a solid throughout the range from 0° C. to 40° C.;
- wherein the composition does not contain soap;
- wherein the carrier (b) is a triglyceride;
- wherein the emulsifier, component (c), has an HLB value of up to 12;
- and
- wherein when two or more emulsifiers are present, the HLB is a weighted average taking into account the individual HLB values and amounts of the two or more emulsifiers.
An emulsion for the preparation of a solid cleansing composition, wherein the composition is a solid throughout the range from 0° C. to 40° C., the emulsion comprising:
- (a) at least 20% wt and up to 50% wt of a non-soap anionic surfactant having a melting point of at least 45° C.;
- (b) at least 20% wt and up to 50% wt of a carrier having a melting point of at least 45° C.;
- (c) at least 2% wt and up to 9% wt of an emulsifier;
- and
- (d) at least 16% wt and up to 50 wt % water;
- wherein the emulsion does not contain soap;
- wherein the emulsion is at a temperature of at least 45° C.;
- wherein the emulsifier, component (c), has an HLB value of up to 12;
- wherein when two or more emulsifiers are present, the HLB is a weighted average taking into account the individual HLB values and amounts of the two or more emulsifiers;
- and
- wherein components (a) to (d) make up at least 70% and up to 100% of the weight of the emulsion.
Dependencies are inferred from the claim text.