153 results about "P-hydroxyanisole" patented technology

Disclosed is a photo-curable conductive adhesive and method for preparation, which is prepared from light-sensitive high molecular polymer, reactive dilution monomer, conducting particles, light-summing heat initiating agent and anti-oxidant through mixing and grinding, wherein the light-sensitive high molecular polymer is epoxy acrylic resin or / and polyurethane-acrylate, the reactive dilution monomer is the single, double and multiple functional monomers of acrylic acid, the conducting particle is silver powder, copper powder or silver-plated copper powder, the light initiating agent is alpha-amine alkyl methyl ketone, benzoin (or substituted benzoin) ether or acyl phosphines, the heat initiating agent is azocompound or peralcohol, the antioxidant is hydroquinone, p-hydroxybenzene methyl ether, 2,6-ditertiary-butyl-4-methylphenol.

A method of preparing special epoxy resin for water ultraviolet light curing coating includes steps: a) using bisphenol A type epoxy resin and acrylic acid as raw material, adding catalyst of triethylamine and inhibitor of p-hydroxyanisole, reacting at 70-100 DEG C, after mass concentration of acrylic acid lower than 40-50%, raising temperature to 110-120 DEG C until acid value of the system lower than 5mgKOH / 100g and generating epoxy acrylate; b) mixing the maleic anhydride and the epoxy acrylate according mole ratio of 0.8:1.05-0.8:1.05 and reacting water epoxy acrylate, adding catalyst triethylamine and inhibitor of p-hydroxyanisole under temperature of 60-100 DEG C and reacting for 1-3 h, adding dimethlyethanolamine to neutralizing, adding water and obtaining water epoxy acrylate with certain solid content.

The invention discloses a macromolecular polymerizable photoinitiator and a preparation thereof. The method comprises the following steps of: adding 4-hydroxybenzophenone and methanal to a three-necked flask, heating to 95 DEG C, reacting for 2 hours, heating to 150DEG C, leaching under at reduced pressure for 20 minutes, cooling to 105 DEG C, collecting products, pouring products into water, leaching to obtain a macromolecular photoinitiator, dissolving the macromolecular photoinitiator in an organic solvent, dissolving epoxy chloropropane in the solvent under catalysis of boron trifluoride,dropwise adding mixed liquid, reacting at a temperature of 0-5 DEG C, then stirring for 3 hours at a temperature of 70 DEG C, removing epoxy chloropropane and solvent, dissolving residues with a solvent, adding alkali and reacting for 0.5 hour at a temperature of 40 DEG C, removing salt and the solvent, re-dissolving residues with a solvent, washing with water and drying, adding crylic acid, p-hydroxyanisole and tetrabutylammonium bromide, heating for reacting for 6 hours, and then removing the solvent so as to obtain macromolecular polymerizable photoinitiator. The macromolecular polymerizable photoinitiator prepared by the method has the advantages of large molecular weight, weak mobility and good polymerizability.

The invention discloses an addition type liquid silicone rubber bonding accelerant and a preparation method and application thereof. The preparation method comprises the steps as follows: mixing an acrylic ester compound and a platinum catalyst solution, and preheating the mixed solution for 20-60 minutes at the temperature of 30-60 DEG C for later use; adding silicon hydrogen bond, hydrogen-containing silicone oil, methylbenzene and para-hydroxybenzaldehyde into a reactor; stirring while heating; when the temperature in the reactor achieves 30-80 DEG C, dripping the mixture of the acrylic ester compound and the platinum catalyst which are primarily heated to 30-60 DEG C into the reactor, for 0.5-3 hours; after dripping, controlling the reaction temperature within 50-90 DEG C and reacting for 0.5-4 hours; adding activated carbon for adsorption, and then performing suction filtering and rotary evaporation to the solution after reaction so as to obtain the bonding accelerant. The bonding accelerant prepared through the method can remarkably improve the adhesive property of the addition type liquid silicon rubber, the preparation process is simple and convenient, the raw materials are cheap and easy to obtain, and the industrialized production is facilitated.

A process for preparing polyol acrylate used as the reactive diluent of irradiation solidification includes such steps as providing polyol and acrylic acid, mixing, adding solvent, polymerizing inhibitor, catalyst and decoloring agent, heating, reflux, adding solid alkali for neutralizing, filtering for removing solid, adding P-hydroxyphenyl mether, vacuum removal of solvent and filtering. Its advantage is no generation of sewage.

The invention discloses a modified hydrogen-containing cyclotetrasiloxane bonding accelerant as well as a preparation method and an application thereof. The preparation method comprises the following steps of: mixing an acrylic ester compound with a platinum catalyst solution, subsequently preheating at 30-60 DEG C, stirring and raising the temperature of 1,3,5,7-tetramethyl cyclotetrasiloxane, methylbenzene and para-hydroxybenzene methyl ether at the same time, when the temperature in a reactor is 30-80 DEG C, dropping a mixture which is preheated to be 30-60 DEG C, of the acrylic ester compound and the platinum catalyst solution, into the reactor, after the dropping, controlling the reaction temperature to be 50-90 DEG C, reacting for 0.5-4 hours, subsequently, adding activated carbon into the reactor to absorb for 0.5-3 hours, and after the absorption, sucking, filtering and evaporating the solution so as to obtain the bonding accelerant. By utilizing the bonding accelerant prepared by using the preparation method, the bonding property of addition-type liquid silica rubber is remarkably improved. The preparation process is simple, raw materials are cheap and easily obtained, and industrial production is easy to realize.

The invention relates to a method for synthesizing a kind of (methyl) acroleic acid glycidic glyceride. It is characterized in that: it takes (methyl) glyceride as raw material, and reacts with epichlorohydrin for ringopening and esterification under catalyst and inhibitor action; then carrying out ring-closure reaction with caustic soda to prepare (methyl) acroleic acid glycidic glyceride. Said catalyst is hexamethylenetetramine or chinoline, 1- methyl glyoxalinyl, and inhibitor is p-hydroxyanisole. The invention is characterized by easy got raw material, low consumption of epichlorohydrin, no utilization of organic disslovant during reaction, short process, simple operation, easy industrialization and little environmental pollution.

The invention provides a synthesis method of UV / moisture dual-curing resin. The method comprises the following steps: placing HDI tripolymer, hydroxied acrylates, polymerization inhibitor hydroquinone monomethylether and catalyst dibutyltin dilaurate into a three-mouth flask with a thermometer, heating the three-mouth flask to 65 DEG C, dropwise adding bis(gamma-trimethoxysilyl propyl)amine, controlling the temperature at 70 to 75 DEG C, and carrying out the reaction for 2 to 3 hours; analyzing NCO groups by utilizing an infrared spectrograph, and stopping the heating reaction when the NCO value is not changed, thereby obtaining the UV / moisture dual-curing resin. The resin can be optically cured by virtue of UV and also can be cured by virtue of moisture, so that the problem that a shadow part cannot be cured in the optical polymerization process; moreover, compared with the resin adopting isocyanate as a reaction group curing-sealing end, the resin adopting methoxylsilane as the moisture curing reaction group is more stable in reaction speed and cured resin effect, and the further curing effect of the product is better.

The invention provides a synthetic method of resin with mixing and solidification functions. The synthetic method of the resin with the mixing and the solidification functions comprises the steps that 80-110 g of polyisoprene dibasic alcohol, 4-10 g of 3-ethyl-3-hydroxymethyleneoxetane, 5-12 g of hydroxyl acrylate, 0.1 g of polymerization inhibitor para hydroxybenzene methyl ether and 0.01 g of catalyst dibutyltin dilaurate are added into a three-mouth flask with a thermometer, the temperature is raised to 65 degrees, then 18-32 g of diisocyanate starts to be dropwise added, the temperature is controlled to be 70-75 degrees, and reaction is performed for 2-3 h. The content of NCO perssad is analyzed by an infrared spectrometer, until the NCO peak disappears completely, the heating reaction is stopped, and the urethane acrylate modified by oxetane can be obtained. The resin with the mixing and the solidification functions can manufacture three-dimensional products with low shrinking percentage, low warping, good flexibility, ageing resistance, high machining precision, good photocuring performance and excellent mechanical strength; in addition, the synthetic reaction is simple in technology and easy to control, no special equipment is needed to be used, no solvent is needed, and the production cost is low.

The invention discloses a synthesizing method of acroleic acid and methacrylate hydroxyalkyl ester, adopting acroleic acid or methacrylate as raw material; proceeding additional reaction for epoxyethane or epoxypropane with molar rate at 1-1.5: 1 to produce (methyl) acroleic hydroxyethyl (hydroxypropyl) ester; setting the reacting temperature at 60-120 deg.c; using the quantity of catalyst at 0.1-1.0% as reactant.

The invention provides polyether polyurethane-acrylate and a preparation method thereof. The polyether polyurethane-acrylate comprises the following compositions in portion by weight: 40 to 60 portions of polyether glycol, 10 to 30 portions of polyisocyanates, 10 to 30 portions of hydroxypropyl acrylate or hydroxy-ethyl acrylate, 0.1 to 0.5 portion of triethylamine or dibutyltin dilaurate, 5 to 10 portions of absolute ethanol, 0.1 to 0.8 portion of p-hydroxyanisole or 2.6- di-tert-butyl-4-methylphenol, 5 to 20 portions of tripropylene glycol diacrylate, 5 to 20 portions of TMPTA, and 0.01 to 0.02 portion of nitrobenzene. The invention has excellent mechanical abrasion resistance and toughness, high elongation at break, excellent chemical resistance and high temperature resistance when coating a film, has low temperature performance and good adhesive force. The polyether polyurethane-acrylate has better using effect when assembling epoxy acrylate, and is the polyurethane acrylate with lowest cost.

The invention relates to a preparation method for a UV-induced photografted charged nanofiltration membrane. The method comprises the following steps: fixing an ultrafiltration membrane with a photo-initiation function in a grafting tank and adding an aqueous solution of a UV grafting monomer, wherein the aqueous solution of the UV grafting monomer further includes a polymerization inhibitor and a chain transferring agent, the polymerization inhibitor is selected from the group consisting of p-hydroxybenzene methyl ether, p-benzoquinone and 1,1-dibenzyl-2-trinitrophenylhydrazine, and the chain transferring agent is selected from the group consisting of sodium formate, sodium acetate and methanol; and allowing the solution to form a liquid film on the ultrafiltration membrane, irradiating the liquid film with an ultraviolet lamp for a reaction and carrying out washing so as to obtain the UV-induced photografted charged nanofiltration membrane. The nanofiltration membrane prepared in the invention has flux of 40 to 120 LMH at an operation pressure of 0.3 Mpa and a salt removing rate of more than 90% on divalent MgCl2.

The invention relates to a preparation method of a reactive type water-solubility chitosan derivative, which comprises the steps of adding chitosan into the aqueous solution of 2-acrylamido-2-methylpropanesulfonic acid, stirring for 0.5 hour at room temperature, preparing the chitosan aqueous solution to 2 wt% with the mole number of the 2-acrylamido-2-methylpropanesulfonic acid being 0.5-4 timesof that of amido of the chitosan, adding p-Hydroxyanisole accounting for 1-3 percent of the mole number of the 2-acrylamido-2-methylpropanesulfonic acid in the above solution, keeping stirring for 0.5hour to lead the chitosan to be fully dissolved in the aqueous solution, heating up to 30-60 DEG C fast, and reacting for 2-6 hours, thus obtaining the reactive type water-solubility chitosan derivative. The method has mild reaction condition, easy control, simple procedures, easy control of substitution degree, environment-protecting subsequent treatment and economical reaction process.

The invention discloses a thermoplastic fiber-reinforced epoxy composite and applications thereof. The thermoplastic fiber-reinforced epoxy composite is prepared by taking epoxy resin and crylic acid as raw materials, thermoplastic fiber aramid woven cloths as reinforcing materials, N,N-dimethylaniline as catalyst, 4-methoxyphenol as polymerization inhibitor, trimethylolpropane triacrylate as diluted monomer, isopropylthioxanthone as photoinitiator, silane coupling agent as modifier, and metahanol as solvent, firstly synthesizing epoxy acrylate, diluting with the trimethylolpropane triacrylate, synthesizing photosensitive resin, dipping the thermoplastic fiber aramid woven cloths with the photosensitive resin, and carrying out fast forming of a novel electric car body support frame on photocuring forming equipment. The photocured electric car body support frame prepared by using the method has excellent performances, is environment-friendly, and has no harm influence on human body and ambient environment, and the curing effect meets the national standard.

The invention relates to a method for preparing a light sensitive type water soluble chitosan derivative. The method comprises the following steps of: adding chitosan into 2-weight percent dilute solution of acetic acid to prepare 2 weight percent aqueous solution of chitosan; adding a light sensitive acrylamide-type monomer of N-p-hydroxyphenyl acrylamide or N-[4-(sulfonamide)phenyl]acryloyl into ethanol to prepare ethanol solution of the light sensitive acrylamide-type monomer; mixing the2 weight percent aqueous solution of chitosan, and the ethanol solution of the light sensitive acrylamide-type monomer to obtain mixed solution; adding p-hydroxyanisole in to the mixed solution; heating the mixed solution to the temperature of between 50 and 70 DEG C for reaction, neutralizing the mixed solution by using sodium hydroxide and performing rotary evaporation, purifying and vacuum-drying to obtain the light sensitive type water soluble chitosan derivative. The method has the advantages of mild reaction conditions, easy control, simple steps, easily-controllable substitution degree, environmentally-friendly subsequent treatment and economical reaction process.

The invention discloses a method for preparing polymerizable photoinitiators. The polymerizable photoinitiators are prepared from methacrylic acid and 2-hydroxyl-4'-(2'-hydroxyethoxy)-2-methyl propiophenone by the aid of direct esterification processes. The use quantity of polymerization inhibitors in a reaction system accounts for 0.01%-0.5% of the mass of the methacrylic acid, the use quantity of methane sulfonic acid which is a catalyst accounts for 0.1%-2% of the mass of the methacrylic acid, and a molar proportion of the methacrylic acid to the 2-hydroxyl-4'-(2'-hydroxyethoxy)-2-methyl propiophenone is 1:1-1.2. Each polymerization inhibitor is methoxyphenol or hydroquinone or 2-tertiary butylhydroquinone, and a solvent is toluene or dimethylformamide or tetrahydrofuran. The method has the advantages that the polymerizable photoinitiators are excellent in compatibility with monomers and resin in photo-curing systems fragments obtained after the polymerizable photoinitiators are subjected to illumination pyrolysis are low in migration rate in cured films and are anti-yellowing, excellent initiation effects can be realized, and the method can be applied to the field of photo-cured coating, printing ink, adhesive and the like; the method for synthesizing the polymerizable photoinitiators is low in cost, processes for preparing the polymerizable photoinitiators are simple and convenient, and obvious application effects can be realized.

The invention provides a synthesizing method for multi-curing available optical resin. The method comprises the following steps: adding 80-110g of HDI tripolymer, 5-10g of 3-ethyl-3-(hydroxymethyl) oxacyclobutane, 4-10g of hydroxyl acrylate, 0.1g of polymerization inhibitor 4-methoxyphenol and 0.01g of catalyst dibutyltin dilaurate into a three-necked flask with a thermometer, and heating to 65 DEG C; controlling the temperature to be 60-75 DEG C, reacting for 2-3 hours, analyzing NCO group with an infrared infrared spectrometer; and stopping the heat reaction when the NCO peak does not change so as to obtain the multi-cured functional resin capable of free radical+cation+moisture reaction.

The invention relates to a novel process for synthesizing p-xylene glycol dimethyl ether. The synthesis method takes hydrochinone and dimethyl sulfate as raw materials, and obtains the product through substitution inside an alkaline medium. Moreover, the synthesis method has the technological characteristics that by means of the principle of equilibrium shifting, the product is moved out of a reaction system during reaction, thereby accelerating reaction and ensuring complete reaction; in the prior synthesis process, the auxiliary raw material dimethyl sulfate no longer participates in reaction when reacted to generate monomethyl sodium sulfate, and the theoretical utilization rate of dimethyl sulfate is only 50 percent; therefore, the method greatly increases the utilization rate of dimethyl sulfate, and reduces the consumption of dimethyl sulfate by 40 percent; meanwhile, reaction yield is also increased to a certain extent; moreover, because the process makes use of the special characteristics of azeotropic distillation of the product and water, the product obtained during reaction can be moved out in time, while the reaction raw materials and intermediate product para hydroxyanisole are stored in a reactor in the form of sodium salts in the alkaline medium and do not enter the product when distilled out along with water vapor; therefore, the product has extremely high purity and can be obtained without adopting the prior alcohol refining; and the novel process ensures greatly simplified production process, higher production safety, lower production cost and labor intensity and better operating environment for workers, thereby having significant social benefit and economic benefit.

The invention relates to a method for preparing allyldimethyl dehydroabietyl ammonium chloride. The allyldimethyl dehydroabietyl ammonium chloride is a cationic surfactant containing unsaturated active C=C double bond and dehydroabietylamine structure. The method comprises the following steps: dissolving dehydroabietylamine in an ethanol-acetonitrile composite solvent, and reacting with formic acid and formaldehyde to obtain N,N-dimethyldehydroabietylamine; in the presence of a composite polymerization inhibitor composed of 2,2,6,6-tetramethylpiperidin-1-yl)oxyl (TEMP), p-hydroxyanisole and hydroquinone in a mass ratio of (0.01-10):(0.01-100):(0.01-10), reacting allyl chloride and the N,N-dimethyldehydroabietylamine at 10-90 DEG C for 5-120 hours to obtain crude allyldimethyl dehydroabietyl ammonium chloride; and finally, recrystallizing by using a composite solvent composed of chloroform, ethyl acetate, aether, dioxane and tetrahydrofuran in a mass ratio of (0.01-10):(0.001-12):(0.1-10):(0.001-16):(0.001-18), and carrying out vacuum drying to obtain the allyldimethyl dehydroabietyl ammonium chloride product of which the mass percentage is greater than 90%.

The invention discloses a method for producing hexahydrophthalic anhydride by using C4 mixture and belongs to the field of organic synthesis. The method comprises the following steps: using maleic anhydride and C4 mixture, which mainly containing butadiene, as the raw materials; under the actions of the HC-200102P compound catalyst [p-hydroxyanisole and Cu2(PPh3)6(mu-OOCH)(ClO4), directly using maleic anhydride to absorb the C4 mixture to obtain tetrahydrophthalic anhydride; and carrying out catalytic hydrogenation on the tetrahydrophthalic anhydride by using the CC-1 compound catalyst (Pd / BaSO4 or Pd / BaCO3, and Cu4(C7H4NO4)2(dppm)4(NO3)2, thereby obtaining the hexahydrophthalic anhydride. The method enhances the reaction selectivity, reduces the production cost, reduces the environmental pollution and has industrialized popularization value.

The invention discloses a liquid photosensitive solder-resist resin for LED and belongs to the technical field of resin materials. The resin comprises the following raw materials in parts by weight: 30 to 40 parts of methacrylic acid monomer, 1 to 5 parts of polymerization thermal initiator, 8 to 12 parts of acrylic acid, 12 to 15 parts of acid anhydride, 35 to 45 parts of solvent, 0.15 to 0.25 part of catalyst, and 0.01 to 0.02 part of polymerization inhibitor, wherein the solvent comprises one of diethylene glycol dimethyl ether and propylene glycol monomethyl ether; the catalyst is triphenyl phosphine, and the polymerization inhibitor is p-hydroxyanisole. The invention also provides a preparation method of the liquid photosensitive solder-resist resin for LED. The provided liquid photosensitive solder-resist resin has the advantages of simple technology, reasonable formula, and excellent yellowing resistant property and photosensitive performance, the service time of resin is prolonged, the using effect of resin is enhanced, and the resin can meet the production requirements.

The present invention relates to a preparation method for polyethylene glycol mono alkyl ether unsaturated carboxylic ester, wherein a purpose of the present invention is to mainly solve the technical problem of long process route of the existing two-step method in the prior art. A technical scheme of the preparation method is that: in the presence of a catalyst, a polymerization inhibitor and an unsaturated carboxylic ester represented by a formula (I), ethylene oxide is added, and a reaction is performed at a reaction temperature of 30-185 DEG C under reaction pressure of -0.01 to 1.9 MPa to obtain the polyethylene glycol mono alkyl ether unsaturated carboxylic ester, wherein the catalyst is SnCl2 and BF3, a weight ratio of SnCl2 to BF3 is 1:0.5-20, the polymerization inhibitor is hydroquinone and / or 4-methoxyphenol, R1 is hydrogen atom or methyl, and R2 is C1-C8 alkyl. With the technical scheme, the technical problem is solved well. The preparation method can be applicable for polyethylene glycol mono alkyl ether unsaturated carboxylic ester production.

The invention belongs to the technical field of organic synthesis. An ultrasonic vibration technology is adopted to accelerate the movement of chemical balance to a product direction. The invention relates to a preparation method of hexa(4-methoxyphenoxyl)cyclotriphosphazene. The method comprises a salt forming process, a nucleophilic substitution process and a post-treatment process, and concretely comprises the following steps: adding a 4-methoxyphenol solution into an acid binding agent solution in a dropwise manner under 800-1000W ultrasonic conditions, and reacting at room temperature for 10-30min to obtain a 4-methoxyphenol salt solution; adding a hexachlorocyclotriphosphazene solution into the 4-methoxyphenol salt solution in a dropwise manner under 800-1000W ultrasonic conditions, and reacting at 35-60DEG C for 1-4h; carrying out a refluxing reaction for 8-12h to obtain a hexa(4-methoxyphenoxyl)cyclotriphosphazene solution; and carrying out reduced pressure distillation to evaporate a solvent in the obtained system, dissolving the obtained concentrated in dichloromethane, washing by deionized water, drying, and carrying out reduced pressure distillation to obtain the target product hexa(4-methoxyphenoxyl)cyclotriphosphazene. The preparation method has the advantages of mildness and easy control of reaction conditions, and high yield, and is suitable for preparing hexa(4-methoxyphenoxyl)cyclotriphosphazene.

This invention relates to a method for synthesizing N, N-dimethylacrylamide by the rectifying 3-dimethylamino-N, N-dimethyl propanamide including: adding DMDMAA into a kettle tower to rise the temperature to 210-215deg.C and adding material liquid and oil of vitriol or acetic acid catalyst and inhibitor,and the kettle tower keeps the teperatue at 210-215 for 2-3h then the rectifying tower operates hydroxyl anisole or hydroquinone in vacuum, which first of all carries out total refluence operation at 80-85deg.C under 0.8-1.0KPa, then evaporates a front fraction including methyl acrylate under operation pressure of 0.5-0.8KPa, 92-97deg.C kettle temperature, 51-52deg.C top gas phase temperature, refluence ratio of 3-5 and the collected product at the top of the tower is DMAA, and the collected un-reacted material DMDMAA returns back to the tank of raw materials.

The invention discloses a method for determining 4-methoxyphenol in industrial acrylamide. The method comprises the following steps of: dissolving methoxyphenol dissolved in a glacial acetic acid solution, adding sodium nitrite to react, so as to generate yellow nitrous acid derivatives; and determining the absorbance of the yellow nitrous acid derivatives by using a spectrophotometer. With the adoption of the method provided by the invention, the problems of insecure operation and poor accuracy which are brought by using concentrated nitric acid to react can be solved. The method is simple and convenient to in operate, good in repeatability, high in sensitivity, and convenient for popularization and application.

The invention provides acid fuchsin writing liquid decolorizer, comprising the following components by weight percent: 45-54% of gypsum, 15-18% of sodium stearate, 25-30% of magnesium sulfite, 0.5-1.5% of p-hydroxyanisole, 0.5-1.5% of pH modulator and 2-5% of metal ion removing complexing agent. The decolorizer of the invention is mainly used for wiping handwriting of teaching writing liquid, has good stability and no pollution, can rapidly discolor the handwriting of acid fuchsin writing liquid, and writing can be carried out again after discoloring without spreading handwriting. When in use, the writing liquid decolorizer is placed in tap water solution for half an hour, after that, can be used by dipping with an eraser. The writing liquid decolorizer also can be used for decoloring methyl blue writing liquid.

The invention discloses a cleaning, derusting and phosphating agent. The cleaning, derusting and phosphating agent comprises the following formula components of raw materials in parts: 10-30 parts of phosphoric acid, 5-10 parts of metaphosphoric acid, 8-10 parts of hypochlorous acid, 5-10 parts of banana oil, 5-8 parts of dimethylbenzene, 5-12 parts of silicone oil, 5-10 parts of methyl ethyl ketone, 5-8 parts of isopropanol, 5-8 parts of diethyl ether, 3-5 parts of urea, 5-6 parts of m-dihydroxybenzene, 3-5 parts of p-hydroxyanisole, 5-8 parts of phenol, 5-8 parts of sodium polyacrylate, 2-3 parts of cocamidopropyl betaine, and 50-60 parts of de-ionized water. The cleaning, derusting and phosphating agent can be used at the normal temperature, has the advantages of quick phosphating speed, good phosphating effect, no corrosiveness, little waste residue discharge, combined completion of cleaning, derusting and phosphating at one step, easy production and low production cost, and can be applied to the degreasing, derusting and phosphating treatment of steel and cast iron products.

The invention provides an optical resin synthesis method, which comprises: adding 80-110 g of an epoxy-modified rosin ester, 4-10 g of a monohydric alcohol, 0.1 g of a polymerization inhibitor p-hydroxyanisole, and 0.01 g of a catalyst dibutyltin dilaurate to a three-necked flask having a thermometer, heating to a temperature of 65 DEG C, adding 18-32 g of diisocyanate in a dropwise manner, controlling the temperature at 70-75 DEG C, carrying out a reaction for 2-3 h, analyzing the NCO group content by using an infrared spectrometer, and stopping the heating reaction when the peak of NCO completely disappears so as to obtain the rosin ester modified polyurethane acrylate resin. According to the present invention, the obtained resin is the high-performance optical resin, has the refractive index of 1.52-1.54, has the good yellowing resistance, can be used for producing the high-end liquid-state optical transparent glue, avoids the disadvantages of low refractive index and poor yellowing resistance of the traditional liquid-state optical transparent glue, and is suitable for the whole adhesion process of the capacitive touch screen.

The invention discloses an ultraviolet light curing offset printing ink which is formed by epoxide resin printing ink pre-polymer, 2, or 4-isopropyl thioxanthone, dimethylin ethyl benzoate, triethylene glyceryl alcohol methyl acrylate, painting and calcium carbonate. It can adjust the painting ink by different painting craft with the ink moving speed: 2-35mm / normal temperature, the viscosity ratio: 100-300pa.s / 30 deg. and the drying time: 150-800s / normal temperature.

The invention discloses a preparation method of p-hydroxyanisole. The preparation method includes: mixing and stirring benzenediol, methanol, solid catalysts and benzoquinone, increasing the temperature, performing constant-temperature backflow reaction for 8 hours, performing midpoint control reaction by the aid of GC (gas chromatography), filtering the catalysts (indiscriminately used for methanol washing) after reaction, recovering the methanol and performing reduced pressure distillation so that the p-hydroxyanisole is obtained. The mass ratio of the benzenediol to the methanol is 1:5, the mass ratio of the benzenediol to the solid catalysts is 2:1, the mass ratio of the benzenediol to the benzoquinone is 2.5:1, and the solid catalysts can be indiscriminately used for methanol washing. The preparation method of the p-hydroxyanisole has the advantages that in the whole process, no wastewater but only a small quantity of distillation residues are produced, environmental damage is avoided, and the catalysts can be indiscriminately reused. Besides, the p-hydroxyanisole is high in quality and yield, the content and the yield of the p-hydroxyanisole are higher than 99.7% and 95% respectively, and the p-hydroxyanisole is extremely high in market competitiveness.