Transparent soap
AssigneeNeutrogena Corporation
InventorsMaxwell H. Poper, Eric Jungermann
Life of this patent
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Abstract
A transparent low alkalinity bar soap based on a tetrakis (hydroxyalkyl) ethylene diamine having the formula ##STR1## wherein R is hydrogen or an alkyl group having one to four carbon atoms and n is one to four. The soap is prepared by adding the tetrakis (hydroxyalkyl) ethylene diamine to a mixture of caustic soda, saponifiable fatty oil, water and a polyhydric alcohol, either before or after saponification, followed by addition of one or more superfatting agents as well as other ingredients designed to affect the properties of the bar for humectant, surfactant and perfuming purposes.
Claims34
A transparent, low alkalinity soap composition in solid form, comprising:
- about 10-30 weight percent of a sodium soap prepared by saponification of fatty oils;
- about 5-20 weight percent of a tetrakis (hydroxyalkyl) ethylene diamine having the formula ##STR4## wherein R is hydrogen or an alkyl group having one to four carbon atoms and n is one to four;
- a polyhydric alcohol in an amount sufficient to assure transparency;
- and
- a fatty acid superfatting agent.
A transparent soap composition in solid form comprising:
- about 10-30 weight percent of a sodium soap prepared by saponification of a mixture of tallow, coconut oil and castor oil, said castor oil comprising about 10 to about 30 weight percent of said misture, the weight ratio of tallow to coconut oil being about 50:50 to about 85:15;
- about 5-20 weight percent of N,N,N',N'-tetrakis (2-hydroxypropyl)-ethylenediamine;
- about 10-40 weight percent of propylene glycol as solvent for said diamine;
- about 6-16 weight percent of superfatting agent comprising stearic acid;
- about 5-10 weight percent of an anionic or amphoteric surfactant;
- and
- about 6-15 weight percent of added water.
A method for the preparation of a transparent soap composition in solid form, comprising:
- bringing together sodium hydroxide solution, saponifiable fatty oil to react with said sodium hydroxide to form a sodium soap constituting about 10-30 weight percent of the transparent soap composition, a tetrakis (hydroxyalkyl) ethylene diamine constituting about 5-20 weight percent of the transparent soap composition, a polyhydric alcohol in an amount sufficient to assure transparency and water;
- saponifying said fatty oil with said sodium hydroxide;
- and
- adding to said saponified mixture a fatty and superfatting agent.
A method for the preparation of a transparent soap composition in solid form, comprising:
- mixing together sodium hydroxide, saponifiable fatty oil to react with said sodium hydroxide to form a sodium soap constituting about 10-30 weight percent of the transparent soap composition, polyhydric alcohol in an amount sufficient to assure transparency, and water;
- saponifying said fatty oil with said sodium hydroxide;
- thereafter adding to said mixture a tetrakis (hydroxyalkyl) ethylene diamine constituting about 10-30 weight percent of the transparent soap composition;
- and
- adding to said saponified mixture a fatty acid superfatting agent.
Dependencies are inferred from the claim text.