US 5,703,025 A · Monohydric alcohol-free process for making a transparent pour molded personal cleansing bar

Abstract

This invention relates to a monohydric alcohol free process for making transparent pour molded personal cleansing bars which exhibit good hardness characteristics. The process comprises: (I) making a molten mixture of from 18 parts to 35 parts soap, wherein said soap is at least 50% insoluble sodium soap; from 14 parts to 32 parts water; from 5 parts to 37 parts synthetic surfactant; and from 18 parts to 37 parts of a water soluble organic solvent, wherein the combined level of water and water soluble organic solvent within the molten mixture is at least 40 parts; and (II) transferring a unit amount of said molten mixture into a bar forming mold or tube and (III) allowing said molded unit to cool in acquiescent conditions into a mild, low smearing transparent personal cleansing bar. The preferred bars made by the process of the present invention are more weight stable than bars made with several parts of alcohol. An important benefit of this invention is that bar processing time is substantially reduced by faster crystallization and faster bar stabilization.

Claims8

Dependent claims

A monohydric alcohol free process for making transparent pour molded personal cleansing soap bars, comprising the steps of:

I. making a molten mix of:
(A) from 18 parts to 35 parts soap;
wherein the soap is at least 50% insoluble sodium soap;
(B) from 5 parts to 37 parts lathering synthetic surfactant, wherein the lathering synthetic surfactant has a critical micelle concentration equilibrium surface tension between 10 and 50 dynes/cm, as measured at 25.degree. C.;
(C) from 14 parts to 27 parts water;
and (D) from 18 parts to 37 parts of a water soluble organic solvent, wherein the combined level of water and water soluble organic solvent within the bar is at least 40 parts;
II. transferring the molten mix to shaped bar molds or forming tubes, and
III. allowing the molten mix to cool under acquiescent conditions at an average rate of approximately 0.1.degree. to 7.0.degree. C. per minute, crystallize and solidify thereby providing said transparent personal cleansing soap bars;
and
wherein in step I, the temperature of the molten mix is adjusted to a temperature in the range of 68.degree. C. to 85.degree. C.;
and wherein heat sensitive materials and optional bar soap ingredients are added to the molten mix in presence of agitation;
and wherein the temperature of the molten mix is again adjusted to a temperature in the range of 68.degree. C. to 85.degree. C. before being poured into the bar shaped molds or forming tubes in step II.

9 more elements

The monohydric alcohol free process for making transparent pour molded personal cleansing soap bars comprising the steps of:

I. making a molten mix of:
(A) from 18 parts to 35 parts soap;
wherein the soap is at least 50% insoluble sodium soap:
(B) from 5 parts to 37 parts lathering synthetic surfactant, wherein the lathering synthetic surfactant has a critical micelle concentration equilibrium surface tension between 10 and 50 dynes/cm, as measured at 25.degree. C.;
(C) from 14 parts to 27 parts water;
and (D) from 18 parts to 37 parts of a water soluble organic solvent, wherein the combined level of water and water soluble organic solvent within the bar is at least 40 parts;
wherein the molten mix is prepared by 1) combining a fatty material selected from the group consisting of triglycerides and fatty acids with said water soluble organic solvent, said water and a first portion of said lathering, synthetic surfactant to provide a premix, 2) heating the premix to a temperature of from 70.degree. C. to 100.degree. C., 3) adding enough caustic solution to said premix to saponify all said fatty material and to provide the molten mix with a low level of excess caustic, 4) adjusting the temperature of molten mix to from 68.degree. C. to 85.degree. C., and 5) adding free fatty acid and a second portion of said lathering synthetic surfactant to said molten mix;
II. transferring the molten mix to shaped bar molds or tubes, and
III. allowing the molten mix to cool under acquiescent conditions at an average rate of approximately 0.1 to 7.0.degree. C. per minute, crystallize and solidify thereby providing said transparent personal cleansing soap bars.

6 more elements

Dependencies are inferred from the claim text.

Monohydric alcohol-free process for making a transparent pour molded personal cleansing bar

Life of this patent

Monohydric alcohol-free process for making a transparent pour molded personal cleansing bar

Life of this patent

Abstract

Claims8