公开(公告)号：EP4328290A1

公开(公告)日：2024-02-28

申请号：EP22904320.3

申请日：2022-12-09

申请人： SPH Corporation

发明人： SHIBATA Mitsuta ,  SHIBATA Kazuko ,  NAKANO Yoshio ,  HAYASAKI Yasushi

IPC分类号： C11D9/26 ,  A61K8/02 ,  A61K8/19 ,  A61K8/34 ,  A61K8/36 ,  A61Q19/10 ,  C11D9/18 ,  C11D17/00 ,  C11D17/08

摘要： 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.