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US 11,141,367 B2Granted
Cosmetic composition comprising two optical brighteners, method, use, and kit-of-parts thereof
AssigneeKao Germany GmbH
InventorsNormen Lipinski, Andreas Picker
Life of this patent
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Abstract
A cosmetic composition is disclosed comprising a synthetic optical brightener and a naturally-derived optical brightener. Both brightener classes absorb and emit light at different wavelengths and possess in combination a superior effect. The combination enhances color brilliance on keratin fibers under daylight and artificial light conditions.
Claims14
A cosmetic composition for keratin fibers, the cosmetic composition comprising:
- two optical brighteners selected from
- a) first optical brightener is
- and/or its salts having a light absorption maximum below 400 nm and a light emission maximum of 400 nm to 500 nm, and
- b) second optical brightener is hydrolyzed Verbascum thapsus flower and/or Verbascum thapsus extract having a light absorption maximum of 400 nm to 450 nm and a light emission maximum of 450 nm to 700 nm,
- wherein
- a weight ratio of the first optical brightener to the second optical brightener is in a range from 1 to 10,000, calculated as dry matter to a total of the cosmetic composition.
3 more elements
Dependencies are inferred from the claim text.