839 results about "Azo compound" patented technology

An ink containing at least one dye represented by formula (1):

wherein R¹, R² and R³ are each independently a hydrogen atom or a monovalent group; Z is a nitrogen atom, or a carbon atom to which a hydrogen atom or a monovalent group is bonded; and at least one of R¹, R², R³, and the monovalent group that Z has is a substituent having a heterocyclic group substituted with an azo group.

An electronic device module comprising: A. At least one electronic device, e.g., a solar cell, and B. A polymeric material in intimate contact with at least one surface of the electronic device, the polymeric material comprising (1) a polyolefin copolymer with at least one of (a) a density of less than about 0.90 g/cc, (b) a 2% secant modulus of less than about 150 megaPascal (mPa) as measured by ASTM D-882-02), (c) a melt point of less than about 95 C, (d) an α-olefin content of at least about 15 and less than about 50 wt % based on the weight of the polymer, (e) a Tg of less than about −35 C, and (f) a SCBDI of at least about 50, (2) optionally, free radical initiator, e.g., a peroxide or azo compound, or a photoinitiator, e.g., benzophenone, and (3) optionally, a co-agent. Typically, the polyolefin copolymer is an ethylene/α-olefin copolymer. Optionally, the polymeric material can further comprise a vinyl silane and/or a scorch inhibitor, and the copolymer can remain uncrosslinked or be crosslinked.

This invention is to provide a method for surface-treatment of a water absorbent resin excelling in water absorption properties. This invention relates to a method for the surface-treatment of a water absorbent resin, which comprises: a) mixing 100 parts by weight of a water absorbent resin, 0.01-20 parts by weight of at least one radical polymerization initiator selected from the group-consisting of persulfates, hydrogen peroxide, and azo compounds, and a radically polymerizing compound and b) irradiating the resultant mixture with active energy rays. The treatment particularly exalts the absorption ratio against pressure and the saline flow conductivity.

A cross linking maleic anhydride-vinyl acetate copolymer preparation method belongs to the field of copolymers. At present, the research on maleic anhydride-vinyl acetate copolymers mostly focuses on the polymerization research of linear polymers. The invention introduces a monomer, cross linking agents and initiators into medium to dissolve under the condition of nitrogen protection, and reacts for 2 to 24 hours under the temperature of 60 DEG C to 90 DEG C; the monomer is maleic anhydride Man and styrene St, the mol ratio is 1:1, and the mass concentration in the polymerization system is 5 percent to 45 percent; the initiators are organic peroxides or azo compounds, and are 0.05 percent to 1 percent of the total mass of the monomers; the cross linking agents are polyfunctionality alkene organic compounds, and are 0.08 percent to 8.8 percent of the total mass of the reactions system, and the rest is the alkyl ester of medium organic acid. The invention does not use surface active agents or stabilizers, can realize the adjustment and control of crosslinking polymer particle size, appearance and chemical physical properties through the adjustment of the addition amount of the cross linking agents.

A supported non-noble metal catalyst used for preparation of an azo compound from an aromatic nitro compound by hydrogenation coupling is disclosed, an active component of the supported non-noble metal catalyst is any one or more than two of Co, Mn, Fe, Ni and Cu, a carrier is a nitrogen-doped carbon-inorganic oxide composite, the content of the active component in the catalyst is 0.1-15wt%, and an inorganic oxide is any one of alumina, aluminum hydroxide, magnesium oxide, magnesium hydroxide, silica, SBA-15, magnesium aluminum hydrotalcite, titanium oxide and cerium oxide. A preparation process is as follows: the active component and a nitrogen-containing complex are together impregnated on the inorganic oxide, and then calcined at certain temperature. The catalyst has excellent catalytic performance in the preparation of the azo compound from a nitro compound by selective hydrogenation coupling one-step method. The catalyst is simple in preparation, and has high catalytic activity and stability.

Azo compounds represented by formula (1) or (2) (In the formulas, A represents a phenyl group or naphthyl group that has at least 1 substituent. R₁-R₄ represent a hydrogen atom, lower alkyl group or lower alkoxy group, with at least one of R₁-R₄ being a lower alkoxy group that has a sulfone group. X represents an optionally substituted amino group, optionally substituted benzoylamino group, optionally substituted phenylamino group, optionally substituted phenyl azo group or optionally substituted naphthotriazole group) and salts thereof.

Use of at least one type of water-dispersible carotenoid nanoparticles as taste modulators in compositions of matter; process for taste modulation of compositions of matter in which at least one type of water-dispersible carotenoid nanoparticles is added to compositions of matter; and also taste modulators for compositions of matter comprising

(A) at least one type of water-dispersible carotenoid nanoparticles and

(B) at least one azo compound, comprising at least one azo group.

There is provided a metal-containing azo compound suitably used for an recording layer of an optical medium, which is represented by at least one of the following general formulae:wherein M(II) is a bivalent metal, X1 and X2 are each a residue that forms a monocyclic or polycyclic aromatic ring, Y1 and Y2 are each a residue that forms a nitrogen-containing aromatic heterocycle, and one residue is different from the other in at least one of a combination of X1 and X2, and a combination of Y1 and Y2; and there is also provided an optical recording medium of which recording layer comprises said metal-containing azo compound.

Azo compounds whose free acid forms are represented by the general formula (1) are extremely useful as the dichroic dye to be used in polarizing plates which are excellent in polarization performance and endurance and reduced in the color cross-talk within the visible light region or in polarizers for liquid crystal projectors made by using them; (1) wherein R1 is sulfo, carboxy, or lower alkoxy and R2 is sulfo, carboxy, lower alkyl, or lower alkoxy, with the proviso that a case wherein both R1 and R2 are each sulfo is excepted; R3 to R6 are each independently hydrogen, lower alkyl, or lower alkoxy; and R7 and R8 are each independently hydrogen, amino, hydroxy, sulfo, or carboxy.

A synthetic method of a styrene/maleic anhydride alternating copolymer with low molecular weight belongs to the field of macromolecular precipitation polymerization. Media and chain transfer agents used in the existing methods for preparing styrene/maleic anhydride copolymers by precipitation polymerization have disadvantages. In the synthetic method, the styrene/maleic anhydride alternating copolymer is prepared by taking a mixed solvent of organic acid alkyl ester and alkane as a reaction medium for the precipitation polymerization, alpha-methylstyrene or vinyl acetate as a molecular weight regulator and organic peroxide or an azo compound as an initiator for initiating a copolymerization reaction between styrene monomers and styrene. The synthetic method has simple process, the synthesized copolymer has good properties, and the method has the advantages of being economical, environment-friendly and the like.

A method of making carbon nanotubes doped with iron, nitrogen and sulphur for an oxygen reduction reaction catalyst includes the steps of mixing an iron containing oxidising agent with a sulphur-containing dye to form a fibrous fluctuate of reactive templates and using these for in-situ polymerisation of an azo compound to form polymer-dye nanotubes, adding an alkali to precipitate magnetite, and subjecting the nanotubes to pyrolysis, acid leaching, and heat treatment.

The invention relates to a preparation method of instant ultra-high molecular weight polyacrylamide dry powder. The method comprises the following steps of: taking acrylic amide AM as a monomer, adopting a low-temperature composite initiation system taking NTP and K2S2O8 as main initiators, and an azo compound as an auxiliary initiator; adopting ammonia water and urea as cosolvents; and adding the initiator in batches and controlling the concentration of the cosolvent and the pH value of the medium, so as to obtain the instant ultra-high molecular weight polyacrylamide dry powder. The relative molecular weight range of the ultra-high molecular weight polyacrylamide PAM is that Mw is smaller than or equal to 25000000 and greater than or equal to 5000000. The optimal production technology is determined by discussing the influence factors such as the initiation system, the cosolvent concentration, and the pH value of the medium; the obtained polyacrylamide is rapidly dissolved, and is high in relative molecular weight, high in percent conversion, low in monomer content, high in production efficiency, low in cost and suitable for industrial production.

The present invention relates to an azo compound represented by the following formula (1):

wherein A denotes a phenyl group having 1 to 3 substituents such as sulfonic acid group, amino group, lower alkyl groups and lower alkoxyl groups, or a naphthyl group, B denotes hydrogen atom, sulfonic acid group, a lower alkyl group, a lower alkoxyl group or the like, each of R¹ to R⁴ independently denotes hydrogen atom, a halogen atom, a lower alkyl group, a lower alkoxyl group or the like, D denotes —NHCO—, —N═N— or —NH—, E denotes hydrogen atom, a lower alkyl group or a phenyl group having 1 to 3 substituents such as hydroxyl group and amino group, n denotes 0 or 1, and m denotes 0 or 1, or a salt thereof, or a copper complex compound of either of them, which is used for a polarizing plate having excellent polarization performance and durability and furthermore little color leakage in visible light range.