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

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 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.