US 11,077,042 B2 · Liquid hair dye composition

Abstract

A liquid hair dye composition comprising the following components (A) and (B), wherein the content (X) of the component (A) in the composition is 1.5 mass % or more and 5.16 mass % or less, the content (Y) of the component (B) in the composition is 9 mass % or more and 98.5 mass % or less, the composition satisfies the following equation (1) (with a proviso that a composition in which the diol content is 50 mass % or more and the water content is 2 mass % or less in the liquid hair dye composition is excluded). Y≥22.75X−22.75 (1) (A) an azo dye represented by the following formula (A-2) (B) a monoalcohol and/or a diol other than alkanolamines

Claims12

Dependent claims

A liquid hair dye composition, comprising:

(A) an azo dye represented by the formula (A-2):
and
(B) at least one selected from the group consisting of a lower monoalcohol having 2 or 3 carbon atoms, a monocyclic aromatic monoalcohol, and a diol having 2 to 6 carbon atoms,
wherein
a content (X) of the component (A) in the composition is 1.5 mass % or more and 5.16 mass % or less,
a content (Y) of the component (B) in the composition is 9 mass % or more and 98.5 mass % or less, and
the composition satisfies the equation (1):
Y≥22.75X−22.75 (1),
with a proviso that that the composition is not a composition in which a diol content is 50 mass % or more and a water content is 2 mass % or less.

6 more elements

Dependencies are inferred from the claim text.

Liquid hair dye composition

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Liquid hair dye composition

Life of this patent

Abstract

Claims12