Abstract

Provided is a method for productively producing a liquid or a paste soap composition which, even at low temperatures, maintains a liquid or paste state for a long time without separating, is gentle on the skin and eyes, and has high foaming power and good cleaning power. In this production method for a soap composition containing a sodium of a higher fatty acid and a potassium of a higher fatty acid, a liquid soap composition is prepared by: heating, to at least 80° C., and melting a mixed saturated fatty acid which is composed of 12- to 18-carbon saturated fatty acids containing 85 to 100 mol % of a 12- and a 14-carbon saturated fatty acid and does not contain an 8- to 10-carbon saturated fatty acid; then adding a cooling liquid composed of glycerin and water to the mixed saturated fatty acid all at once, cooling the mixture to a temperature at least 20° C. lower than the heated temperature, and then heating the mixture again and holding the mixture at a temperature between 40 and 55° C.; adding a mixed alkaline aqueous solution all at once to the mixed fatty acid-containing liquid that has been heated and held at said temperature, said mixed alkaline aqueous solution being obtained by mixing potassium hydroxide and/or potassium carbonate and sodium hydroxide and/or sodium carbonate in a molar ratio in the range from 90/10 to 30/70; and, while agitating, heating the mixture and then holding the mixture at a temperature between 80 and 95° C. in order to neutralize the mixture.

IPC Classes  ?

• C11D 13/10 - MixingKneading
• C11D 13/12 - Cooling
• C11D 17/08 - Liquid soapDetergent materials or soaps characterised by their shape or physical properties capsuled

Abstract

The production method for a soap composition comprising; heating to at least
80 C and melting a mixed saturated fatty acid composed of 12- to 18-carbon
saturated fatty acids containing 85 to 100mol% of a 12- and a 14-carbon
saturated fatty acid and does not contain an 8- to 10-carbon saturated fatty
acid;
adding a cooling liquid composed of glycerin and water to the mixed acid at
once,
cooling the mixture to a temperature at least 20 C lower than the heated
temperature, heating the mixture again and holding the mixture at a specific
temperature; adding a mixed alkaline aqueous solution at once to the mixed
fatty
acid-containing liquid, said mixed alkaline aqueous solution being containing
potassium hydroxide and/or potassium carbonate and sodium hydroxide and/or
sodium carbonate in a specific molar ratio; while agitating, heating the
mixture
and holding the mixture at a specific temperature to neutralize the mixture.

IPC Classes  ?

• A61K 8/34 - Alcohols
• A61K 8/36 - Carboxylic acidsSalts or anhydrides thereof
• C11D 9/18 - Water-insoluble compounds
• C11D 9/26 - Organic compounds containing oxygen

Abstract

Provided is a method for productively producing a liquid or a paste soap composition which, even at low temperatures, maintains a liquid or paste state for a long time without separating, is gentle on the skin and eyes, and has high foaming power and good cleaning power.　In this production method for a soap composition containing a sodium of a higher fatty acid and a potassium of a higher fatty acid, a liquid soap composition is prepared by: heating, to at least 80°C, and melting a mixed saturated fatty acid which is composed of 12- to 18-carbon saturated fatty acids containing 85 to 100 mol% of a 12- and a 14-carbon saturated fatty acid and does not contain an 8- to 10-carbon saturated fatty acid; then adding a cooling liquid composed of glycerin and water to the mixed saturated fatty acid all at once, cooling the mixture to a temperature at least 20°C lower than the heated temperature, and then heating the mixture again and holding the mixture at a temperature between 40 and 55°C; adding a mixed alkaline aqueous solution all at once to the mixed fatty acid-containing liquid that has been heated and held at said temperature, said mixed alkaline aqueous solution being obtained by mixing potassium hydroxide and/or potassium carbonate and sodium hydroxide and/or sodium carbonate in a molar ratio in the range from 90/10 to 30/70; and, while agitating, heating the mixture and then holding the mixture at a temperature between 80 and 95°C in order to neutralize the mixture.

IPC Classes  ?

• C11D 9/26 - Organic compounds containing oxygen
• A61K 8/02 - Cosmetics or similar toiletry preparations characterised by special physical form
• A61K 8/19 - Cosmetics or similar toiletry preparations characterised by the composition containing inorganic ingredients
• A61K 8/34 - Alcohols
• A61K 8/36 - Carboxylic acidsSalts or anhydrides thereof
• A61Q 19/10 - Washing or bathing preparations
• C11D 9/18 - Water-insoluble compounds
• C11D 17/00 - Detergent materials or soaps characterised by their shape or physical properties
• C11D 17/08 - Liquid soapDetergent materials or soaps characterised by their shape or physical properties capsuled