16results about "Azo dye preparation" patented technology

A dichroic bis-azo biphenyl dye of the following formula:The substituents R1, R2, R3, R4 are alkyl (CnH2n+1) or alkenyl (CnH2n−1) groups with n=1-18. At least one substituent among R1R2R3R4 is different from the other substituents. A benzidine-free method of making a dichroic bis-azo biphenyl dye is provided in which the biphenyl portion of the dye is formed from different first and second mono-azo dyes by a cross-coupling reaction, which may be a Suzuki reaction. A polarizer is formed from a photoaligned layer of the bis-azo biphenyl dye on a substrate and exhibits a dichroic ratio of at least 40. Chemical modification of the photoaligned bis-azo biphenyl dye layer creates a broad-band thin film polarizer with low light scattering and high thermal and photo tolerances.

The present application relates to an azo compound represented by formula (1A). L 1 and L 2 represents a divalent linking group or a single bond. y represents 1 or 2. p and q represent 0 or 1, at least one of which is 1. X represents an oxygen atom or NR 5 5 represents a hydrogen atom or an aliphatic hydrocarbon group. R 12 13 14 represents an aliphatic hydrocarbon group or the like, and can have a polymerizable group. Q represents a single bond or a group selected from the group consisting of -OC(=O)-, -C(=O)O-, -C≡C-, -CH=CH-, -N=N-, -NHC(=O)-, and -C(=O)NH-. Ar 1 2 3 represents 1,4-phenylene or a divalent sulfur-containing aromatic heterocyclic group. In the case where y is 2, the two Ar 3 may be the same or different.​​​​​

This invention provides a diazobiphenyl dye for thin-film polarizers, which is an analog of AD1. Thin-film polarizers prepared using this dye exhibit good optical quality, such as low light scattering, high dichroism ratio, broadband absorption, and / or stability to heat and light irradiation. This invention also provides a method for preparing the diazobiphenyl dye from two different monoazo dyes via a cross-coupling reaction. This method is eco-friendly because it does not use toxic benzidine as a raw material. The product (diazobiphenyl dye) obtained by this method can be purified in a simple and convenient manner, and the diazobiphenyl dye prepared by this method can have a symmetrical or asymmetrical structure. Furthermore, this invention provides a thin-film polarizer comprising the diazobiphenyl dye and an apparatus for display applications comprising the thin-film polarizer.

To provide a laundry care composition comprising a laundry care ingredient and a polymeric thiophene hueing agent.SOLUTION: A laundry care composition comprises: (i) a laundry care ingredient; and (ii) 0.0001 wt.% to 1.0 wt.% of a polymeric thiophene hueing agent having a structure of Formula I. The polymeric thiophene hueing agent provides a whitening bias on a cellulose-containing textile article when compared to a polyester-containing textile substrate, where the whitening bias is measured via the following formula: (whitening bias)=(change in whitening of the cellulose-containing textile article / change in whitening of the polyester-containing textile article), where the whitening effect is measured via a whiteness index on each textile article.SELECTED DRAWING: None

A polarizing plate for use in a liquid crystal shutter of a light shaping device, the polarizing plate including an absorption-type polarizer in which a dichroic dye is aligned, the absorption-type polarizer having a maximum absorption wavelength in a wavelength range of 370 to 470 nm, the weighted parallel transmittance Xp380-440 of the polarizing plate being 20% or more, and the weighted orthogonal transmittance Xc380-440 being 0.0001 to 0.1%.

The invention discloses a clean production process for cationic dyes. A parent substance and dimethyl sulfate undergo a methylation reaction, followed by expansion and hydrolysis. Salt and zinc chloride are added for transformation and crystallization. After crystallization, the product and mother liquor wastewater are filtered. Zinc chloride and sodium chloride are added to the mother liquor wastewater obtained after crystallization for neutralization. After nanofiltration, the concentrated solution is applied to the hydrolysis and expansion process of the next batch. The wastewater after nanofiltration enters a biochemical treatment system. The clean production process of the invention can solve the problems of generating and applying crystallization wastewater, reduce wastewater treatment costs, increase product yield, reduce wastewater generation and salt usage, and recover a small amount of cationic dye dissolved in the wastewater.

This invention relates to a laundry care composition comprising a laundry care ingredient and a polymeric thiophene hueing agent.

To provide an azo compound excellent in storage stability in a composition state, and capable of forming a high quality film.SOLUTION: An azo compound is represented by formula (1A). L1 and L2 are bivalent binding groups, or single bonds. y is 1 or 2. p and q is 0 or 1, and at least one of them is 1. X is an oxygen atom, or NR5, and R5 is a hydrogen atom, or an aliphatic hydrocarbon group. R12, R13, and R14 are aliphatic hydrocarbon groups and the like, and may have polymerizable groups. Q is a single bond, or a group selected from the group consisting of -OC(=O)-, -C(=O)O-, -C≡C-, -CH=CH-, -N=N-, -NHC(=O)-, and -C(=O)NH-. Ar1, Ar2, and Ar3 are 1,4-phenylene groups, or bivalent sulfur-containing aromatic heterocyclic groups. When y is 2, two Ar3 may be same or different.SELECTED DRAWING: None

To provide a laundry care composition which makes soiled textile articles appear brighter and whiter even at low wash temperatures and short cycle times, and to provide a method for increasing the whitening efficacy / index for textile articles.SOLUTION: A laundry care composition comprising: (i) a laundry care ingredient; and (ii) from 0.0001 to 1.0 wt% of a polymeric thiophene hueing agent of formula (III): SELECTED DRAWING: None

To provide a high-performance achromatic polarizing film which offers a high transmittance and high contract and is achromatic when displaying white and when displaying black, and to provide an achromatic polarizing plate using the same, and a display device.SOLUTION: A polarizing film is provided, comprising substances represented by the following formulas (1) and (2).SELECTED DRAWING: None

The object of this invention is to provide a color-curable resin composition that can reduce crosstalk in color filters. [Solution] The present invention relates to a colored curable resin composition comprising a colorant, a resin, a polymerizable compound, and a polymerization initiator, wherein the colorant comprises a first pigment composed of at least one selected from an orange pigment and a red pigment, and a yellow pigment, the first pigment comprises a diketopyrrolopyrrole pigment and an azo pigment, and the yellow pigment comprises CI Pigment Yellow 180.

A polarizing element which contains, in the form of a free acid: an azo compound represented by formula (1) or a salt thereof, or an azo compound represented by formula (2) or a salt thereof; and an azo compound represented by formula (3) or a salt thereof.

An azo compound represented by formula (1) or a salt of the azo compound. (In the formula, each of A1 and A2 independently represents an optionally substituted naphthyl group or an optionally substituted phenyl group; each of m, n and p independently represents 0 or 1, and either m or n represents 1; and each of R1 to R12 independently represents a hydrogen atom or a substituent.)

The invention belongs to the technical field of disperse dye synthesis, and particularly relates to a preparation method and application of a cyaniding dye. The invention discloses a cyanided dye preparation system formed by a cuprous catalyst and a cocatalyst in a synergistic manner, which is used for cyaniding dye intermediates to synthesize disperse dyes. The dye intermediate does not need secondary crystal transformation, so that the procedures are reduced, and the comprehensive consumption reduction is also facilitated; and the water resistance of the preparation system is good, the water content of the raw materials and the solvent is increased to 2%, and the yield of the cyaniding dye is still maintained above 90%. By adding the cocatalyst, acidification of a reaction system is effectively avoided, generation of by-products is inhibited, the conversion rate and the utilization rate of raw materials are improved, and the method conforms to the reduction, reutilization and recycling principles of green chemical industry.

To provide a novel compound that can detect hydrogen sulfide in a biological sample, with high sensitivity.SOLUTION: A compound comprises a xanthene dye represented by the constitutional formula 1 combined with a light absorber (dye) that has light absorption in a wavelength range of 350 to 700 nm and a highest molecular absorption coefficient of 104M-1 cm-1 or more.SELECTED DRAWING: None

The present invention relates to compounds of formula (I): (I) wherein R1 is a dye, and L1, R2 and R3 are as defined herein. The compounds of the invention reversibly convert from a hydrophobic form to a hydrophilic form upon contact with water and carbon dioxide. The present invention also relates to methods of dyeing fibres, and methods of decolouring dyed fibres. The method is particularly useful for dyeing polyester fibres.