113results about "Trisazo dyes" patented technology

A black ink composition comprising a colorant represented by Formula 1 below same as claim 1 and a colorant represented by Formula 2 below same as claim 1.A1-N═N-A2-N═N-A3  FORMULA 2

The invention discloses a polarizing film, a laminate, and a liquid crystal display device. The polarizing film, satisfying Dl' / P'<=4.3X10-4 which expresses relation between degree of polarization P', and depolarization index Dl' calculated by the equation below is disclosed. X represents a value calculated by the equation below, provided that a polarizing plate having degree of polarization of P, the polarizing film, and a polarizing plate having degree of polarization P, having azimuths of transmission axes of a DEG, b DEG and c DEG, respectively, are stacked in this order as viewed from a flight source, to give brightness written as [a / b / c].

Disclosed is an azo compound represented by the formula (1) or (2) below, or a salt thereof.(In the formulae, A represents a substituted phenyl group or a naphthyl group having 1-3 sulfonic acid groups; X represents —N═N— or —NHCO—; R1-R4 independently represent a hydrogen atom, a lower alkyl group or a lower alkoxyl group; m represents a number of 1-3; and n represents 0 or 1.)

This application relates to thiophene azo dyes for use as hueing agents, laundry care compositions comprising such thiophene azo dyes, processes for making such thiophene azo dyes, and laundry care compositions and methods of using the same. The thiophene azo dyes contain a formally charged moiety and are generally comprised of at least two components: at least one chromophore component and at least one polymeric component. Suitable chromophore components generally fluoresce blue, red, violet, or purple color when exposed to ultraviolet light, or they may absorb light to reflect these same shades. These thiophene azo dyes are advantageous in providing a hueing effect, for example, a whitening effect to fabrics, while not building up over time and causing undesirable blue discoloration to the treated fabrics. The thiophene azo dyes are also generally stable to bleaching agents used in laundry care compositions.

The present invention relates to a trisazo compound represented by the following formula (1) or a salt thereof, The formula (1)wherein, the group A is a substituted phenyl group, the group B and the group C are substituted para-phenylene groups, R1 represents a C1 to C4 alkyl group which may be substituted by a carboxy group, a phenyl group which may be substituted by a sulfo group, or a carboxy group, R2 represents a cyano group, a carbamoyl group or a carboxy group, each of R3 and R4 independently represents a hydrogen atom, a methyl group, a chlorine atom or a sulfo group, respectively and a water-based black ink composition containing said compound; said compound has high solubility in a medium where the main component is water, its aqueous solution having a high concentration and ink are stable when stored for a long period of time, black-recorded images with it can be provided where both light fastness and ozone gas fastness of the printed images are excellent.

[PROBLEMS] To provide: a black compound which is for use in ink-jet recording or writing utensils, is excellent in ozone resistance, light resistance, moisture resistance, and color rendering, and gives a recording fluid having satisfactory storage stability; and an ink composition containing the compound. [MEANS FOR SOLVING PROBLEMS] The black compound is a trisazo compound represented by the following formula (1) or a salt thereof. (1) [In the formula (1), R1 and R2 each independently represents hydrogen, carboxy, sulfo, hydroxy, a C1-4 alkyl, C1-4 alkoxy, or sulfo group optionally substituted by C1-4 alkoxy, an optionally carboxylated C1-4 alkoxy group, etc.; and A represents phenyl or naphthyl (provided that the phenyl and naphthyl groups may be substituted by halogeno, carboxy, sulfo, sulfamonyl optionally substituted by alkyl or phenyl, nitro, etc.).]