Abstract: The invention relates to an external skin care composition comprising a ceramide production-accelerating agent and a film-forming polymer. The external skin care composition can enhance the barrier function of the skin and has an excellent skin roughness-improving effect.

Abstract: The invention relates to an external skin care composition comprising a ceramide production-accelerating agent and a film-forming polymer. The external skin care composition can enhance the barrier function of the skin and has an excellent skin roughness-improving effect.

Abstract: Provided is a hair dye composition comprising a direct dye (1): A—CR1═N—NR2—B X−  (1) [wherein, A represents a group (2) or (3): (in which, R3, R4 and R5 each independently represents a (substituted) C1-6 alkyl group, ring C may have a substituent or may by cyclocondensed with an aromatic ring, R6 and R7 each independently represents a (substituted) C1-6 alkyl group, or may be coupled to form a heterocycle together with the adjacent nitrogen atom, Z represents a (substituted) C1-4 divalent linear hydrocarbon group and ring D may be cyclocondensed with an aromatic ring), B represents a (substituted) aromatic group, R1 represents H or a (substituted) C1-6 alkyl group, R2 represents H or a (substituted) C1-6 alkyl group or a (substituted) aromatic group or may form a heterocycle together with the C atom of the aromatic ring B, and X− represents an anion].

Abstract: Provided is a hair dye composition containing a direct dye (1). This hair dye composition has markedly high hair dyeing power, has less color fade over time and undergoes a small change in the color tone of the dye even after storage. wherein, R1 to R4 each represents a (substituted) C1-6 alkyl group, (substituted) alkenyl group or (substituted) aryl group or R3 and R4, when taken together with the adjacent C, form a 5 to 12 membered ring, R5 represents H, (substituted) C1-6 alkyl group, (substituted) alkenyl group, (substituted) aryl group or acyl group, X1 and X2 each represents H or halogen atom, Y1 and Y2 each represents H, (substituted) C1-6 alkyl group, (substituted) alkenyl group, (substituted) C1-6 alkoxy group or halogen atom, Z1 and Z2 each represents H, (substituted) C1-6 alkyl group, (substituted) alkenyl group, (substituted) C1-6 alkoxy group, nitro group or halogen atom, and A− represents an anion.

Abstract: Provided is a hair dye composition comprising a direct dye (1): A—CR1═N—NR2—B X−  (1) [wherein, A represents a group (2) or (3): (in which, R3, R4 and R5 each independently represents a (substituted) C1-6 alkyl group, ring C may have a substituent or may by cyclocondensed with an aromatic ring, R6 and R7 each independently represents a (substituted) C1-6 alkyl group, or may be coupled to form a heterocycle together with the adjacent nitrogen atom, Z represents a (substituted) C1-4 divalent linear hydrocarbon group and ring D may be cyclocondensed with an aromatic ring), B represents a (substituted) aromatic group, R1 represents H or a (substituted) C1-6 alkyl group, R2 represents H or a (substituted) C1-6 alkyl group or a (substituted) aromatic group or may form a heterocycle together with the C atom of the aromatic ring B, and X− represents an anion].

Abstract: Provided is a hair dye composition comprising a direct dye (1):

Abstract: The invention relates to a hair dye composition having markedly high dyeing power, less color fade over time, and undergoes a small change in the color tone of the dye even after storage.

Abstract: Provided is a hair dye composition containing a direct dye (1), (2) or (3). This hair dye composition has markedly high hair dyeing power, has less color fade over time and undergoes a small change in the color tone of the dye even after storage. wherein, R1 represents a (substituted) aryl group, R2, R4 to R6, R8 and R9 each represents H, a (substituted) C1-6 alkyl group or a (substituted) aryl group, R3 and R7 each represents a (substituted) aryl group, R10 to R12 each represents a (substituted) C1-6 alkyl or (substituted) aryl group, rings A to G each represents a benzene ring which may be substituted by a (substituted) amino group, (substituted) C1-6 alkyl group, C1-6 alkoxy group or halogen atom or may further be cyclocondensed with a benzene ring, and X− represents an anion.

Abstract: Provided is a hair dye composition containing a direct dye (1). This hair dye composition has markedly high hair dyeing power, has less color fade over time and undergoes a small change in the color tone of the dye after storage. wherein, ring A may represents a benzene ring which may have a substituent or the like, B represents an aryl or heterocyclic group, D represents N or CR4 (wherein R4 represents H or alkyl), E represents NR5, CR6R7 or CR6═CR7 (wherein R5 represents alkyl or the like, and R6 and R7 each represents H or alkyl) or, O or S, R1 represents alkyl or the like, and n stands for 0 or 1, with the proviso that at n=0, R2 and R5 form, when taken together with N—C—C, a heterocycle, or R2 is bonded to B, thereby forming a heterocycle and at n=1, R2 and R3 form, when taken together with C═D—N, a heterocycle, and X− represents an anion.

Abstract: Provided is a hair dye composition containing a direct dye A—D═D—B. This hair dye composition has markedly high hair dyeing power, has less color fade over time and undergoes a small change in the color tone of the dye even after storage. A represents any one of the following groups (2) to (8): (in which R1, R4, R5 and R6 each represents H, (substituted) C1-6 alkyl group, etc., R2 and R3 each represents (substituted) C1-6 alkyl group, etc., or form, when taken together with the adjacent C, a cycloalkane ring, Q represents N or group CR′, R7 represents (substituted) aralkyl group or a group CH2—CH(OH)—CH2—OR″, R8 and R9 each represents H, (substituted) C1-6 alkyl, etc., or form, when taken together with the adjacent N, a heterocycle, X− represents an anion, and rings C-I may each have a further substituent or a condensed ring), D represents N or group CR′″, and B represents the residue of a coupling component.

Abstract: Provided is a hair dye composition comprising as a direct dye a compound represented by the following formula (1), (2), (3) or (4): [wherein, R1 and R1′ each independently represents a (substituted) C1-6 alkyl or a (substituted) aryl group; W and W′ each independently represents a group —A—NR2R3 or a (substituted) heterocyclic aromatic group; A and A′ each independently represents a divalent (substituted) aryl group; R2, R2′ and R3 each independently represents H, a (substituted) alkyl or a (substituted) aryl group, or R2, R2′ or R3 may be bonded to A or A′, thereby forming a heterocycle, R2 and R3, or R2 and R2′ are coupled to form a heterocycle, together with the adjacent atom; R4 to R6 each independently represents H, (substituted) alkyl or (substituted) alkenyl group; Q represents a divalent organic group; X represents a modified carboxy group, an —SO2—T— group (in which, T represents an alkyl, alkenyl or aryl)

Abstract: Provided is a hair dye composition containing a direct dye (1) or (2). The hair dye composition has markedly high hair dyeing power, has less color fade over time and undergoes a smaller change in the color tone of the dye after storage. [R1, R2 and R3 are the same or different and each independently represents a C1-3 alkyl group and benzene ring A or B may contain a nondissociative substituent].

Abstract: A hair dye composition containing a direct dye (1) wherein, R1, R2 represents H or a lower alkyl group, A represents a group (2) or (3) and wherein B represents a group —Z1, —NR8—Z1 or —CH=Z2.

Abstract: Provided is a hair dye composition containing a direct dye (1). This hair dye composition has markedly high hair dyeing power, has less color fade over time and undergoes a small change in the color tone of the dye even after storage. wherein, rings A and B represents a benzene ring which may have a substituent and may further be cyclocondensed with another aromatic ring, D and E each independently represents a group NR3 (in which R3 represents a C1-6 alkyl group) or an S atom, R1 and R2 each independently represents a C1-6 alkyl group, and X− represents an anion.

Abstract: Provided is a hair dye composition containing a direct dye (1). This hair dye composition has markedly high hair dyeing power, has less color fade over time and undergoes a smaller change in the color tone of the dye after storage. [B1, B2: the group (2), (3), (4) or (5); R1, R2: the group (6), (7), etc.; X-: anion (A: a (substituted) phenylene group, etc., R3, R4: a (substituted) lower alkyl group, etc.; X1: O, —NH— or CH2-; X2: a (substituted) trimethylene group, etc.; Y: a (substituted) lower alkyl group, etc.; R5: a lower alkyl group, etc.; R6: a lower alkyl group, etc.; R7: H, etc.; X3: —OH, —NH2— or —SH; R8: a lower alkoxy group, etc.; and R9: a phenyl group, etc.)].

Abstract: Provided is a hair dye composition containing a direct dye (1). This hair dye composition has markedly high hair dyeing power, has less color fade over time and undergoes a small change in the color tone of the dye after storage.

Abstract: Provided is a hair dye composition containing a direct dye (1): 1

Abstract: The invention relates to a hair dye composition having markedly high dyeing power, less color fade over time, and undergoes a small change in the color tone of the dye even after storage.

Abstract: Provided is a hair dye composition containing a direct dye A−D=D−B. This hair dye composition has markedly high hair dyeing power, has less color fade over time and undergoes a small change in the color tone of the dye even after storage.

Abstract: Provided is a hair dye composition containing a direct dye (1), (2) or (3). This hair dye composition has markedly high hair dyeing power, has less color fade over time and undergoes a small change in the color tone of the dye even after storage.