초록 ▼

A skin cream composition containing allantoin and an emulsifier has improved stability coming from the adjustment of the pH to a range of 4.5 to 5.8. The lower pH preserves the stability of the allantoin and the functionality of the emulsifier system is maintained. The emulsifier system can be a non

A skin cream composition containing allantoin and an emulsifier has improved stability coming from the adjustment of the pH to a range of 4.5 to 5.8. The lower pH preserves the stability of the allantoin and the functionality of the emulsifier system is maintained. The emulsifier system can be a nonionic emulsifier or an anionic emulsifier plus beeswax. The acid used to adjust the pH can be an organic acid or an inorganic acid. The composition can further comprise other ingredients such as herbal extracts, chelating agents, preservatives, emollients, solvents, and fragrance.

대표청구항 ▼

[ I claim:] [1.]1. A composition consisting essentially of an oil-in-water emulsion comprising:(a) allantoin; and(b) an emulsifier system including beeswax and an anionic emulsifier that is hydrophilic and is soluble in water; and(c) an acid to adjust the pH of the emulsion to a value from about 4.5

[ I claim:] [1.]1. A composition consisting essentially of an oil-in-water emulsion comprising:(a) allantoin; and(b) an emulsifier system including beeswax and an anionic emulsifier that is hydrophilic and is soluble in water; and(c) an acid to adjust the pH of the emulsion to a value from about 4.5 to about 5.8, the allantoin being stable in the emulsion for at least 90 days at 40.degree. C.