Hair colouring or bleaching products, and compositions thereof, with alkali canceling effect
AssigneeHFC Prestige International Holdings Switzerland S.A.R.L.
InventorsFrank VEVERKA, Manfred Guenther SCHMITT, Rebecca KNOBLOCH
Life of this patent
Estimating the term…
Abstract
It is provided herewith a hair treating product comprising an oxidizing component and a tint component; a hair treating composition obtained upon mixing of the oxidizing component and the tint component; the use of the oxidizing component in a hair treating product, for cancelling the alkalinity of a tint component; and an oxidizing component comprising a buffer system. The hair treating product, and the corresponding hair treating composition, is particularly useful for colouring or bleaching hair. It is useful for providing permanent or demi-permanent coloration or bleaching to keratin fibers.
Claims14
Hair treating product, said product comprising:
- (1) an oxidizing component having an acidic pH above 1.5 and comprising:
- from 1% to 16% of at least one source of oxidizing agent by total weight of the oxidizing component;
- a buffer system;
- said buffer system comprising:
- a buffering acidic compound;
- a buffering alkali compound;
- wherein the buffering acidic compound is selected from the group consisting of organic and inorganic acids, and the corresponding buffering alkali compound is selected from the group consisting of alkali metal salts, amino acids, and salts thereof;
- wherein the buffering acidic compound and the buffering alkali compound are present in amounts sufficient for providing a buffering effect equivalent to a buffer system comprising from 0.5% to 4% phosphoric acid and from 0.4 to 3.5% disodium phosphate by total weight of the oxidizing component;
- and with a weight ratio of phosphoric acid to disodium phosphate comprised from 1:1 to 10:1;
- wherein the buffering capacity of the buffer system is superior by a factor from 5 to 40 times than the buffer system of a conventional oxidizing component comprising about 0.1% of a buffering acidic compound being phosphoric acid and about 0.1% of a buffering alkali compound being disodium phosphate by total weight of the oxidizing component;
- (2) a tint component having an alkali pH from 7.5 to 11.5 and comprising;
- from 0.5% to 12% of at least one source of alkalizing agent by total weight of the tint component.
An alkali cancelling oxidizing component, for use in a hair-treating product and/or for obtaining a hair treating composition upon mixing with a tint component, said oxidizing component having an acidic pH above 1.5 and comprising:
- from 1% to 16% of at least one source of oxidizing agent by total weight of the oxidizing component;
- and
- a buffer system;
- said buffer system comprising:
- a buffering acidic compound;
- a buffering alkali compound;
- wherein the buffering acidic compound is selected from the group consisting of organic and inorganic acids, and the corresponding buffering alkali compound is selected from the group consisting of alkali metal salts, amino acids, and salts thereof;
- wherein the buffering acidic compound and the buffering alkali compound are present in amounts sufficient for providing a buffering effect equivalent to a buffer system comprising from 0.5% to 4% phosphoric acid and from 0.4% to 3.5% disodium phosphate by total weight of the oxidizing component;
- and with a weight ratio of phosphoric acid to disodium phosphate comprised from 1:1 to 10:1;
- and
- wherein the buffering capacity of the buffer system is superior by a factor from 5 to 40 times than the buffer system of a conventional oxidizing component comprising about 0.1% of a buffering acidic compound being phosphoric acid and about 0.1% of a buffering alkali compound being disodium phosphate by total weight of the oxidizing component.
Hair treating product, said product comprising:
- (1) an oxidizing component having an acidic pH above 1.5 and comprising from 1% to 16% of at least one source of oxidizing agent by total weight of the oxidizing component;
- (2) a tint component having an alkali pH from 7.5 to 11.5 and comprising from 0.5% to 12% of at least one source of alkalizing agent by total weight of the tint component;
- (3) a third component comprising a buffer system;
- said buffer system comprising:
- a buffering acidic compound;
- a buffering alkali compound;
- wherein the buffering acidic compound is selected from the group consisting of organic and inorganic acids, and the corresponding buffering alkali compound is selected from the group consisting of alkali metal salts, amino acids, and salts thereof;
- wherein the buffering acidic compound and the buffering alkali compound are present in amounts sufficient for providing a buffering effect equivalent to a buffer system comprising from 0.5% to 4% phosphoric acid and from 0.4% to 3.5% disodium phosphate by total weight of the third component;
- and with a weight ratio of phosphoric acid to disodium phosphate comprised from 1:1 to 10:1;
- wherein the buffering capacity of the buffer system is superior by a factor from 5 to 40 times than the buffer system of a conventional third component comprising about 0.1% of a buffering acidic compound being phosphoric acid and about 0.1% of a buffering alkali compound being disodium phosphate by total weight of the third component;.
Dependencies are inferred from the claim text.