30 results about "3-hydroxy-2-naphthoic acid" patented technology

The invention discloses an industrial production and detection method of excellent migration-resistant heat-resistant pigment red PR-48: 2 and belongs to the technical field of pigment synthesis and detection. The method comprises carrying out an acidification reaction process on sodium 2-amino-4-chloro-5-methylbenzenesulfonate to obtain a suspending liquid, adding a sodium nitrite aqueous solution into the suspending liquid, carrying out diazotization to obtain a diazotized solution, carrying out coupling on the diazotized solution and 3-hydroxy-2-naphthoic acid in the presence of a dispersant to obtain a product, carrying out lake treatment on the product to obtain pigment red, drying and crushing the pigment red to obtain toner particles, mixing the toner particles, PU resin and a solvent DMF according to a certain ratio, carrying out high-rate beating homogenization, coating a release paper with the slurry through a scraper, carrying out high temperature baking, tearing the coating to obtain a coloured release paper and comparing a migration degree through a color measurement instrument. The method has mild reaction conditions, low equipment requirements and short reaction time, is convenient for operation and utilizes a common dispersant. The product paratonere has good performances and migration resistance of 5 level and resists a temperature of 210-220 DEG C.

Disclosed is C. I. pigment red 57:1 wherein the content of 3-hydroxy-2-naphthoic acid and metal salts thereof as determined by quantitative analysis by liquid chromatography is not more than 2,500 ppm in terms of 3-hydroxy-2-naphthoic acid.

The invention discloses a naphthoyl urea compound used for preparing carrier generation material and its process for preparing, which belongs to the intermediate technology of carrier generation material. The said naphthoyl urea includes N - ( 3,5 - di - methylphenyl ) - N - ( 3 - hydroxyl - 2 - naphthoyl ) urea and N -( 4- methylphenyl ) - N - ( 3 - hydroxyl - 2 - naphthoyl) urea. Its process for preparing includes: preparing 3-hydroxy-2-naphthoyl by stocks of 3-hydroxy-2-naphthoic acid and thionyl chloride with carrene, chloroform or carbon tetrachloride as its solvent and DMF as its catalyst; preparing aryl urea by adding arylamine and cyanate in the deion-ized water; obtaining the corresponding naphthoyl urea compound by reaction between 3-hydroxy-2-naphthoyl and aryl urea in the solvent of acetic ester or benzene. The invention is excellent in that the carrier generation material prepared by the provided naphthoyl urea compound is of fine light-electric performance and the provided process for preparing is of simple composited course and cheap stock.

The invention discloses an industrialized production method of a transference-resistant blue light red pigment for PU (Poly Urethane) and belongs to the technical field of fine chemical synthesis. The industrialized production method comprises the following steps of: by taking 2-chlorine-4-amino toluene-5-sulfonic acid and 3-hydroxy-2-naphthoic acid as main raw materials, and then salifying, diazotizing, coupling and carrying out a lake reaction, and subsequently, filtering and drying at 70-120DEG C to acquire the transference-resistant blue light red pigment for the PU. By adding a mixed lake salt compound into the blue light red pigment, the lake reaction efficiency is improved, the colored light of the blue pigment red is improved, the growth of the original crystal form is facilitated and the heat resistance property is improved; a modifier is added in after-treatment, so that the transference resistance application property of the blue light pigment red in the application of the PU is improved; the reaction condition is warm; the demand in equipment is low; and the acquired product blue pigment red has the advantages of good property, transference resistance reaching level 4 and above, acid resistance reaching level 4 and above, alkali resistance reaching level 4 and above, weather fastness reaching level 5 and above, heat resistance reaching higher than 220 DEG C, so that the popularization and the application are facilitated.

An industrial production method for a red with small precipitation on a machine surface and a method for detecting precipitation on a machine surface and belong to the technical field of pigment synthesis and detection. Amino chlorotoluene sulfonic acid sodium salt is subjected to acidification to obtain a turbid liquid; a sodium nitrite water solution is added to achieve diazotization so as to obtain a diazotized solution; the diazotized solution and 3-Hydroxy-2-naphthoic acid are subjected to coupled reaction with existence of a dispersant, and the obtained product is laked to obtain a red. Before laking, the dispersant is added to coat the pigment so as to obstruct growth of the pigment crystal form, the dispersity is improved, the applicability of the machine surface precipitation during application of the blue-ray red to plastics is remarkably improved, and the economic benefits are improved; the reaction conditions are mild, the requirements on equipment are low, and the reaction time is short; the dispersant is relatively common, the application difficulty of a modifier is relatively low, the performance of the obtained blue-ray red is good, the heat resistance can reach 220-230 DEG C, and the transference resistance is of 4 grade.

The embodiment of the invention discloses a 3-hydroxy-2-naphthoic acid / 1-perfluorooctane sulfonate / LYH complex and a synthetic method thereof. The 3-hydroxy-2-naphthoic acid / 1-perfluorooctane sulfonate / LYH complex has the following chemical formula: Y(OH)2.5(Cl1H7O3)xC8H17O3S)y.zH2O, wherein x is equal to 0.07 to 0.13, y is equal to 0.36 to 0.37, and z is equal to 1 to 2. The synthetic method comprises the following steps: combining NO3-LYH with deprotonated 3-hydroxy-2-naphthoic acid (namely 3-hydroxy-2-naphthoate ion) and 1-octanesulfonate ion, so as to obtain the 3-hydroxy-2-naphthoic acid / 1-perfluorooctane sulfonate / LYH complex. The fluorescence emission intensity of the complex is obviously higher than that of 3-hydroxy-2-naphthoic acid sodium salt, so that the detection limit in the process of detecting 3-hydroxy-2-naphthoic acid by adopting fluorescent spectrometry can be reduced.

The invention relates to an industrial production method of migration-resistant bright red pigment 150 for PU, which belongs to the technical field of pigment synthesis. It uses 3-amino-4-methoxybenzanilide, water and hydrochloric acid to obtain a dispersion liquid through acid precipitation and salt formation; in the dispersion liquid, sodium nitrite aqueous solution is diazotized to obtain a diazotized solution, and then mixed with 2-Hydroxy-3-naphthoamide and 3-hydroxy-2-naphthoic acid undergo a coupling reaction, and then undergo a temperature-raising crystallization reaction to obtain a migration-resistant bright red pigment for PU. By adopting the above technology, the present invention has mild reaction conditions, low equipment requirements, short reaction time, common modifiers and less difficulty in application; and the raw materials used do not contain halogen, which meets the limited halogen content of products on the market and meets The new environmental protection theme advocated; the obtained product has bright color, its heat resistance reaches 230 ℃, and its migration resistance is grade 5.

The invention discloses a halogen-free lead-free soldering paste and a soldering flux used by the same. The soldering paste comprises the following components: 2.8-3.2% of Ag, 0.48-0.52% of Cu, 11-12% of soldering flux, and the balance of Sn, wherein the soldering flux comprises the following components: 1-2% of organic acid activating agent, 10-15% of hydrazine hydroxy carboxylic acid compound, 23-42% of organic solvent, 3-8% of thixotropic agent, 0.5-2% of surface active agent, and the balance of water-solubility macromoleclar polymer; and the above percent is mass percent; the organic acidis malic acid, sebacic acid, adipic acid, glutaric acid, or octanedioic acid; the hydrazine hydroxy carboxylic acid compound is 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonate) diammonium salt, or 3-hydroxy-2-naphthoic acid, or hydrazine sulfate; the organic solvent is glycerol and glycol; the thixotropic agent is hydrogenated castor oil or ethylene bis stearamide; the surface active agent is alkylphenol ethoxylates or octylphenol ethoxylates; and the water-solubility macromoleclar polymer is polyethylene glycol the molecular weight of which is 200-2000. The soldering paste and the soldering flux used by the same have better welding performance.