| 摘要 |
PROBLEM TO BE SOLVED: To obtain a soild soap compsn. which is prevented from cracks and degradation of bubbling due to long-term use and has reduced skin-irritating properties by incorporating a specified amt. of an alkali metal salt of a fatty acid having specified distribution of the number of carbon atoms into the same. SOLUTION: An alkali metal salt of a fatty acid which contains up to 25 wt.% sum of satd. 16C distillates and unsatd. 18C distillates and 5-30 wt.% satd. 12C distillates is incorporated in an amt. of at least 75 wt.% based on the solid soap compsn. A pref. distribution of the number of carbon atoms is such that satd. 8-10C linear chains account for 0-25%; satd. 12C linear chains, 5-30%; satd. 14C linear chains, 0-50 %; satd. 16-18C linear chains, 0-25%; unsatd. 18C F1, 20-45%; and unsatd, 18C F2, 0-5 %, provided the ratio of the satd, 16C linear chains to the satd. 18C linear chais is not specifically limited. In the distribution, the unsatd. distillates pref. account for 25-45%. Examples of the fatty acid used are ones derived from animal fats (e.g. beef tallow or lard) and derived from vegetable oils (e.g. palm oil, coconut oil, or soy bean oil).
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