US 2025/0059464 A1 · PROCESS FOR PREPARING 'SOAP-FREE', 'SULPHATE-FREE' AND 'GRIT-FREE' SOLID CLEANSING COMPOSITIONS

Abstract

The invention relates to a process for preparing soap free, sulphate free and grit free solid cleansing composition. The composition has pH resembling to skin pH which comprises ‘non-soap’, ‘non-sulphate’ anionic surfactants and hydrogenated triglyceride oil/s, and optionally, skin benefit agents and/or hair benefit agents. This is accomplished by a unique short and cost-effective process without using any emulsifier or plasticizer. The process entails synthesizing sodium O-acyl isethionates by reacting fatty acid chloride with dry sodium methyl isethionate and sodium isethionate in a sequential manner followed by addition of hydrogenated triglyceride oil. The hot homogeneous paste of sodium O-acyl isethionates and vegetable oils is then flaked. The flakes are then kneaded in a sigma blender where other optional ingredients are mixed. The mass thus obtained is then further refined on a triple roll mill and plodded/extruded into billets or noodles.

Claims14

Dependent claims

A process for preparing soap free, sulphate free and grit free solid cleansing composition comprising steps of:

A. preparing mixture of sodium O-acyl isethionate and sodium methyl O-acyl isethionate by reacting a part of acyl chloride with sodium methyl isethionate at 30° C. to 40° C., raising the temperature to 65° C. to 75° C., and adding sodium isethionate to allow consumption of remaining acyl chloride to obtain a reaction mixture;
B. adding hydrogenated triglyceride oil to the reaction mixture of step A to obtain a reaction mass;
C. adding a nitrogenous base to the reaction mass of step B to adjust the pH and afford a viscous reaction mass;
D. flaking the viscous reaction mass obtained in step C to afford flakes;
and
E. kneading the flakes obtained in step D, refining and plodding it, wherein the pH in step C is adjusted in between 4 to 6;
and
wherein the plodding temperature is between 38 to 42° C.

5 more elements

A process for preparing soap free, sulphate free and grit free solid cleansing composition, the composition comprising:

a. at least 30%, by weight of total composition, a mixture of sodium O-acyl isethionate and sodium methyl O-acyl isethionate;
and
b. at least 30%, by weight of total composition, one or more hydrogenated vegetable oil;
such that the ratio of sodium O-acyl isethionate and sodium methyl O-acyl isethionate is 4:6 to 6:4;
and
such that melting point of the hydrogenated vegetable oil is at least 45° C.;
wherein the process comprises steps of:
A. preparing mixture of sodium O-acyl isethionate and sodium methyl O-acyl isethionate by reacting a part of acyl chloride with sodium methyl isethionate at 30° C. to 40° C., raising the temperature to 65° C. to 75° C., and adding sodium isethionate to allow consumption of remaining acyl chloride to obtain a reaction mixture;
B. adding hydrogenated triglyceride oil to the reaction mixture of step A to obtain a reaction mass;
C. adding a nitrogenous base to the reaction mass of step B to adjust the pH and afford a viscous reaction mass;
D. flaking the viscous reaction mass obtained in step C to afford flakes;
and
E. kneading the flakes obtained in step D, refining and plodding it, wherein the pH in step C is adjusted in between 4 to 6;
and
wherein the plodding temperature is between 38 to 42° C.

12 more elements

Dependencies are inferred from the claim text.

Process for preparing 'soap-free', 'sulphate-free' and 'grit-free' solid cleansing compositions

Life of this patent

Process for preparing 'soap-free', 'sulphate-free' and 'grit-free' solid cleansing compositions

Life of this patent

Abstract

Claims14