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US 2019/0240137 A1Published application
Use of cationic polymer having quaternary ammonium groups for the protection of hair against uv damage
AssigneeDsm IP Assets B.V.
InventorsChristine MENDROK-EDINGER, Karina HECKER
Life of this patent
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Abstract
The present invention relates to the use of a very specific class of cationic polymers having quaternary ammonium groups for the protection of hair against UV damage.
Claims10
A use of a cationic polymer having quaternary ammonium groups which is
- either a homopolymer of
- or a copolymer of
- for the protection of hair against UV damage;
- wherein
- R1 and R2 represent independently from each other either a linear or a branched C1-10-alkyl group, particularly a linear or branched C1-3-alkyl group;
- and
- R3 and R4 represent independently from each other either H or a methyl group.
4 more elements
A method of protecting hair from UV damage comprising the steps:
- a) applying a cationic polymer having quaternary ammonium groups to the surface of hair;
- b) exposing the hair to which cationic polymer having quaternary ammonium groups has been applied according to step a) to UV radiation;
- c) observing a lower level of hair damages after UV exposure according to step b) as compared to hair which has been exposed to UV radiation according to step b), however, to which no cationic polymer having quaternary ammonium groups has been applied according to step a);
- wherein the cationic polymer having quaternary ammonium groups is
- either a homopolymer of
- or a copolymer of
- wherein
- R1 and R2 represent independently from each other either a linear or a branched C1-10-alkyl group, particularly a linear or branched C1-3-alkyl group;
- and
- R3 and R4 represent independently from each other either H or a methyl group.
7 more elements
Dependencies are inferred from the claim text.