472 results about "Hydroxybenzoic acid" patented technology

To provide a timber antiseptic agent which exhibits superior safety and superior antibacterial performance with low influence on the human body and environment.SOLUTION: The present invention relates to a timber antiseptic agent containing an alkyl 4-hydroxybenzoate represented by formula (1) [where R represents an alkyl group having 5 to 10 carbon atoms] or a salt thereof.SELECTED DRAWING: None

Methods for preparing a salt of urolithin A and, in turn, urolithin A. Combining in an alkaline aqueous solution a copper-containing catalyst, 2-bromo-5-hydroxybenzoic acid, and resorcinol produces a salt of urolithin A. Urolithin A has been prepared by protonating a salt of the compound.

The invention provides a polyarylester nanofiber and a preparation method thereof, and the preparation method comprises the following steps: firstly, carrying out acetylation reaction on 4-hydroxybenzoic acid (HBA) and 6-hydroxy-2-naphthoic acid (HNA) to obtain acetylated HBA and acetylated HNA, and then carrying out copolymerization on acetylated HBA and acetylated HNA and 4-hydroxybutyric acid (GHB) to obtain HBA / GSB / HNA copolymerized arylester granules B; the preparation method comprises the following steps: carrying out blending spinning on granules B and HBA / HNA copolymerized aromatic ester granules A obtained by copolymerizing acetylated HBA and acetylated HNA in the prior art, putting the obtained blended polyarylate fibers into an organic solvent containing a strong base, carrying out chemical etching and deprotonation, carrying out disassembly from top to bottom to obtain a polyarylate nanofiber suspension, and finally carrying out suction filtration and drying to obtain the polyarylate nanofibers. According to the preparation method disclosed by the invention, the blended polyarylester fiber containing an aliphatic chain is subjected to etching and deprotonation treatment through strong base to disassemble the polyarylester nanofiber, and a certain amount of-CH2-structure is introduced into a main chain, so that disassembly preparation of the nanofiber is facilitated, and the polyarylester nanofiber with uniform diameter and length and controllable length-diameter ratio is obtained.

The invention relates to a series of cobalt-nitrogen-carbon confinement cobalt nano-particle catalysts with high catalytic activity and high cycle stability and a preparation method thereof, wherein the cobalt-nitrogen-carbon confinement cobalt nano-particle catalysts are obtained by changing the ratio of cobalt-cobalt Prussian blue analogue to melamine in a precursor and calcining. Under the conditions of different ions, organic matters and complex water quality, excellent catalytic activity is still maintained, and efficient degradation of p-hydroxybenzoic acid is realized. The core-shell structure formed by the cobalt-nitrogen-carbon confinement cobalt nanoparticles in the catalyst plays a very important role in exposure of active sites and formation of local high instantaneous concentration, persulfate can be effectively activated to generate non-free radical dominated high-valence cobalt oxygen species, migration and interaction with pollutants are enhanced, and the pollution to the pollutants is reduced. And the characteristics of high activity, strong environmental resistance, high cycle stability and the like of the catalyst are realized. The catalyst has excellent removal efficiency on various pollutants, preparation and characteristics of the catalyst are not reported before, and the catalyst has a good prospect in the application field of complex matrix organic wastewater.

The invention discloses a bisphenol F degradation gene cluster bpf and application thereof. The strain DN12 is separated and can degrade the BPF and grow by taking the BPF as the unique carbon source and energy. On the basis, a BPF degradation gene cluster bpf is obtained from the strain DN12 by adopting whole genome and comparative transcriptome sequencing analysis. Three different degrading enzymes (two-component oxidase BpfAB, monooxygenase BpfC and hydrolase BpfD) are found in the gene cluster and can catalyze gradual degradation of BPF, and a simple aromatic ring compound p-hydroxybenzoic acid is generated.

The invention discloses streptomyces bulbus as well as a multifunctional fungicide and application thereof. According to the invention, firstly, a strain of Streptomyces tauricus zhanshen-LZ-12 is separated and screened from straw returning soil, and the preservation number of the strain is CGMCC (China General Microbiological Culture Collection Center) No.34456. The invention also discloses a preparation method of the Streptomyces tauricus zhanshen-LZ-12. The strain has the functions of degrading cellulose, decomposing protein, fixing nitrogen, resisting salt, degrading phenolic acid autotoxic substances (benzoic acid, p-hydroxybenzoic acid and cinnamic acid) and the like. Bacterial powder obtained after fermentation of the bacterial strain is uniformly mixed with bacillus bacterial powder to obtain the multifunctional bacterial agent, and when straw returning or composting is carried out, the multifunctional bacterial agent is adopted, straw decomposition can be accelerated, soil ecology can be improved, crop growth can be promoted, and the stress resistance of crops can be enhanced.

The invention discloses a method for producing mRNA (messenger ribonucleic acid) template plasmids by fermenting escherichia coli. When the recombinant escherichia coli is fermented and cultured, a seed solution of the recombinant escherichia coli is inoculated into a basic culture medium to be fermented and cultured until the OD600 value of fermentation liquor is 18-22, then a fed-batch culture medium is continuously added at the feeding rate of 5-15 mL / L / h to be subjected to continuous fed-batch fermentation culture, the basic culture medium contains 0.05-0.2 mmoL / L of ferric salt compound and 0.05-0.2 mmoL / L of copper chloride dihydrate, and the basic culture medium contains 0.05-0.2 mmoL / L of ferric salt compound and 0.05-0.2 mmoL / L of copper chloride dihydrate. The basal culture medium contains 10-15 g / L of copper chloride dihydrate and 100-300 mg / L of p-hydroxybenzoic acid, the carbon source of the basal culture medium contains 0.1-0.3 mmoL / L of a ferric salt compound, 0.1-0.3 mmoL / L of copper chloride dihydrate and 100-300 mg / L of p-hydroxybenzoic acid, the carbon source of the fed-batch culture medium contains 360-480 g / L of glycerol, and the ferric salt compound is one or more of ferrous citrate, ferric ammonium citrate or ferrous sulfate heptahydrate. According to the method, the yield and superhelix content of the mRNA template plasmids are improved by optimizing the culture medium formula and culture conditions, and large-scale production of the high-quality target mRNA template plasmids is facilitated.

The invention discloses a preparation method and application of a zinc gallate catalyst for synthesizing carbon dioxide-based polycarbonate, and belongs to the technical field of catalysts.The zinc gallate catalyst is prepared through the steps that zinc salt and gallic acid (3, 4, 5-trihydroxybenzoic acid) are subjected to a reaction, low-carbon-number alcohol serves as a complexing agent, and a reaction solution is obtained; the copolymer can be applied to ring-opening copolymerization of carbon dioxide and epoxide, and a third monomer even a fourth monomer can be added on the basis to carry out ternary copolymerization and quaternary copolymerization to generate aliphatic polycarbonate with a multi-element structure. The activity of the zinc gallate catalyst for catalyzing ring-opening copolymerization of carbon dioxide and epoxypropane is larger than 900 g polymer / g catalyst, the content of carbonate units is larger than 96%, the selectivity is larger than 91%, the balance of the activity and the content of the carbonate units can be met, the synthesis process is simple, the reactant cost is low, and the zinc gallate catalyst is very suitable for industrial production of carbon dioxide-based polycarbonate.

The invention discloses a method for preparing high molecular weight thermotropic liquid crystal polyester through melt coupling solid phase polycondensation. The method comprises the following steps: mixing p-hydroxybenzoic acid, 6-hydroxy-2-naphthoic acid and a catalyst 1-methylimidazole according to a specific molar ratio of (70-75): (25-30) to synthesize a liquid crystal polyester prepolymer with specific logarithmic viscosity; the preparation method comprises the following steps: crushing and drying a liquid crystal polyester prepolymer, placing prepolymer particles in a solid phase polycondensation device, accurately controlling the time and temperature of the polycondensation reaction, carrying out heating reaction in a nitrogen atmosphere to obtain high molecular weight thermotropic liquid crystal polyester, taking out the high molecular weight liquid crystal polyester, and carrying out viscosity test. In the preparation process of the prepolymer, the prepolymer with proper logarithmic viscosity can be effectively prepared by controlling the reaction temperature and time, so that the controllable preparation of the polymer is realized; the solid-phase polycondensation time required for obtaining the high-molecular-weight polymer is shortened by crushing the prepolymer into particles with different diameters, so that the solid-phase polycondensation efficiency is improved.

The invention relates to the technical field of liquid crystal polymers, and discloses a high-temperature-resistant, electricity-conducting and heat-conducting graphene-LCP material and a preparation method thereof.The preparation method comprises the steps that a diacid monomer, p-hydroxybenzoic acid and 4, 4 '-bis (4-hydroxyphthalimide)-benzamido benzene are subjected to a carboxyl reaction, liquid crystal polyarylester is obtained and mixed with graphene oxide, and the high-temperature-resistant, electricity-conducting and heat-conducting graphene-LCP material is obtained. The liquid crystal polyarylester molecular chain contains an imide ring, so that the thermal decomposition mass loss temperature of the liquid crystal polyarylester LCP material can be improved. The liquid crystal polyarylester contains amido bonds and forms strong interaction with hydroxyl and carboxyl on the surface of the graphene oxide, the interfacial compatibility between the graphene oxide and the liquid crystal polyarylester can be improved, the graphene oxide does not need surface modification and has good dispersity in the LCP material, a conductive path is formed, and the conductivity and the antistatic performance are improved.

Use of a lubricating composition in an ammonia combustion engine The present invention relates to the use of a lubricating composition comprising at least one alkali or alkaline-earth salt of hydroxybenzoic acid, optionally substituted by at least one hydrocarbon group, called hydroxybenzoate salt, in an ammonia combustion engine. It also relates to the use of said hydroxybenzoate salt as a corrosion retardant in an ammonia combustion engine. It also relates to a method for lubricating an ammonia combustion engine, comprising a step of bringing at least one mechanical part of said engine into contact with a lubricating composition comprising at least said hydroxybenzoate salt. Figure for abstract: None

The invention discloses a smoke-suppression flame-retardant ecological board and a preparation method thereof. The ecological board comprises a base material, a flame-retardant adhesive layer and a facing layer which are sequentially stacked, wherein the flame-retardant adhesive layer is prepared from the following raw materials: 100 parts of urea-formaldehyde resin, 10-15 parts of a phosphorus-nitrogen composite flame retardant and 5-10 parts of flame-retardant filler; the preparation method of the phosphorus-nitrogen composite flame retardant comprises the following steps: carrying out an aminomethylation reaction on p-hydroxybenzoic acid, ethanolamine and paraformaldehyde which are used as raw materials in a molar ratio of 1: (1-1.2): (2-2.2) to prepare a Mannich base intermediate; and carrying out substitution reaction on the Mannich base intermediate and phosphonitrilic chloride trimer serving as raw materials according to the molar ratio of (3-7): 1. The phosphorus-nitrogen flame retardant disclosed by the invention is high in content of phosphorus and nitrogen elements and uniform in distribution ratio, and has more excellent synergistic smoke suppression and flame retardant effects compared with an existing physical compound system.

The invention belongs to the technical field of scale inhibitors, and particularly relates to a slow-release scale inhibitor and a preparation method thereof.The preparation method comprises the steps that 3, 4, 5-allyl trihydroxybenzoate, itaconic acid, sodium hydrogen sulfite, methacryloyloxyethyl-n-hexadecyl-dimethyl ammonium bromide and deionized water are mixed, after water bath heating, an ammonium persulfate aqueous solution is slowly added, and the scale inhibitor is obtained after reaction; the preparation method comprises the following steps: dissolving agar in deionized water, adding polyethylene glycol modified sodium alginate and a scale inhibitor into the deionized water, stirring, dropwise adding into edible oil to obtain gel microspheres, adding the gel microspheres into a calcium chloride aqueous solution, slowly stirring, cross-linking, cleaning and drying to obtain the slow-release scale inhibitor. The hydrogel microspheres swell to slowly release the scale inhibitor, meanwhile, the released scale inhibitor is hydrolyzed in water, ester groups are slowly broken, polycarboxylic acid, 3, 4, 5-trihydroxybenzoic acid and hydroxyethyl-n-hexadecyl-dimethyl ammonium bromide are slowly released, and good scale inhibition and corrosion inhibition effects are achieved.

The present invention relates to the use of a lubricant composition comprising at least one alkali salt or alkaline earth salt of hydroxybenzoic acid, optionally substituted with at least one hydrocarbon group, referred to as hydroxybenzoate salt, in an ammonia combustion engine. The invention also relates to the use of said hydroxybenzoate salt as a corrosion retardant in an ammonia combustion engine. The invention further relates to a method for lubricating an ammonia combustion engine, comprising a step of bringing at least one mechanical part of said engine into contact with a lubricant composition comprising at least said hydroxybenzoate salt.

The invention belongs to the technical field of biomedical polyurethane materials, and particularly discloses an antibacterial waterborne polyurethane material, a preparation method of the antibacterial waterborne polyurethane material and application of the antibacterial waterborne polyurethane material in preparation of medical catheters. 8 to 15% of oligomeric polyether glycol; 1-3% of oligomeric hydroxyl-terminated polybutadiene; 2-4% of acrylate polyethylene glycol dopamine; 2 to 4% of hydroxyl-terminated polyvinylpyrrolidone; 2-6% of a hydrophilic chain extender containing a tertiary amine group; 1 to 3 percent of acrylic acid-2-hydroxyethyl ester; 2-6% of a 1, 3, 4, 5-trihydroxybenzoic acid neutralizer; 0.1 to 0.5 percent of an organic bismuth catalyst; 10 to 15% of acetone; and the balance of water. According to the waterborne polyurethane material provided by the invention, acrylate polyethylene glycol dopamine and hydroxyl-terminated polyvinylpyrrolidone are adopted in the raw materials, so that the hydrophilicity and lubricity of the waterborne polyurethane material can be effectively and synergistically improved, and the adhesion of the waterborne polyurethane material is reduced; and the anticoagulation performance of polyethylene glycol can be improved by using the anticoagulation effect of polyethylene glycol.

The invention discloses a polyurethane bonding layer resin material, which belongs to the field of high polymer material and structure bonding, and comprises 40-60 parts by mass of a prepolymer A which is obtained by reacting 4, 4 '-diphenylmethane diisocyanate with polyether polyol with the molecular weight of 1800-2200g / mol and the hydroxyl value of 55-65mgKOH / g in the absence of a metal catalyst, and the mass fraction of residual NCO is 3-7%; the hydroxyl-terminated chain extender B is a blend of 1, 4-butanediol and 1, 6-hexanediol, and the molar ratio of the 1, 4-butanediol to the 1, 6-hexanediol is (1.0: 1)-(2.0: 1); the aromatic block modifier C is formed by condensation polymerization of p-hydroxybenzoic acid and isophorone diisocyanate, and the content of aromatic rings in the aromatic block modifier C is 30%-50%; 3 to 8 parts of a fluorine-containing isocyanate modifier D; 1 to 5 parts of an anti-migration stable component E; and 2-6 parts of a crosslinking density regulator F. The adhesive provided by the invention has excellent damp-heat aging resistance, dimensional stability and solvent resistance, high bonding strength and stable interface bonding, and is suitable for long-term bonding application in a complex environment.

The invention discloses a synthesis method of dotenorad. The invention provides a preparation method of a compound B. The preparation method comprises the following step: reacting 3, 5-dichloro-4-hydroxybenzoic acid with a compound A to generate the compound B in an organic solvent under the action of a condensing agent. The preparation method provided by the invention is short in step, high in reaction yield, high in purity, low in three-waste generation amount, low in production cost and high in product quality, and is a green and environment-friendly preparation method. # imgabs0 #

The invention relates to polyarylester containing a furandicarboxylic acid unit and a preparation method thereof, and the polyarylester is prepared by the following steps: carrying out melt polycondensation on several monomers such as p-hydroxybenzoic acid, biphenol, terephthalic acid, 2, 5-furandicarboxylic acid and acetaminophen to prepare a prepolymer; and carrying out solid-phase polycondensation reaction on the prepolymer in a rotary kiln under a nitrogen protection condition. The furan-dicarboxylic acid is used as a bio-based product, is a green and renewable substitute of terephthalic acid / isophthalic acid, and meets the green and environment-friendly requirements in the future. The polyarylester obtained by the method can be subjected to melt processing at the temperature of 330-390 DEG C, and is engineering plastic with excellent mechanical properties.

The invention discloses an application of 2, 3-dihydroxybenzoic acid in preparation of an antitumor drug. Researches find that 2, 3-dihydroxybenzoic acid can inhibit proliferation, migration and invasion of colorectal cancer cells in vitro and promote cell cycle arrest and cell apoptosis, and 2, 3-dihydroxybenzoic acid can inhibit growth of mouse transplanted tumors in vivo and promote cell apoptosis; the 2, 3-dihydroxybenzoic acid has a remarkable treatment effect on mouse colon cancer and can improve the immunotherapy effect; moreover, the 2, 3-dihydroxybenzoic acid small molecule substance, as an inhibitor of fatty acid synthase (FASN), plays an important role in inhibiting colorectum.

The invention discloses a polyphenol hydroxyl fatty alkyl amide lubricant for water-based drilling fluid and a preparation method of the polyphenol hydroxyl fatty alkyl amide lubricant, and belongs to the technical field of oilfield chemistry, the preparation method comprises the following steps: a, weighing 0.10 mol of polyhydroxybenzoic acid, 0.10-0.12 mol of fatty amine and 0.3-0.5% of a catalyst NaF; b, adding into a 250mL three-neck flask provided with a condensation reflux device and a water segregator, introducing nitrogen for protection, heating to 200-250 DEG C, and stirring for reaction for 5-7 hours to obtain a dark brown viscous liquid product; c, carrying out amidation reaction on polyhydroxybenzoic acid and fatty amine to generate polyphenol hydroxyl fatty alkyl amide; and d, stirring and mixing the polyphenol hydroxyl fatty alkyl amide and the solvent high-carbon-number fatty alcohol according to the mass ratio of 6: 4-4: 6 at 70-80 DEG C for 2-3 hours to obtain the lubricant product. The lubricant prepared by the invention has strong adsorption capacity at high temperature and high salt, and a formed lubricating film has strong extreme pressure resistance and wear resistance and is suitable for efficient drilling of ultra-deep wells.

The present disclosure is directed to oral dosage forms of TRβ agonist VK2809 and methods of preparing the same. The disclosure provides oral dosage forms of VK2809 with improved stability and solubility properties that allow for storage under normal conditions through the use of spray-drying with one or more polymers selected from the group consisting of: polyvinyl pyrrolidone (PVP), polyvinyl pyrrolidinone-vinyl acetate copolymer (PVP-VA), polyvinyl alcohol (PVA), polyacrylic acid (PAA), polyethylene oxide) (PEO), hydroxypropyl cellulose (HPC), hydroxypropyl methyl cellulose (HPMC), copovidone, poloxamer 407, hypromellose acetate succinate (HPMCAS), polyacrylates and combinations thereof.

The invention discloses a novel preparation method of 2, 6-dihydroxybenzoic acid, the synthetic route is shown as follows: # imgabs0 takes resorcinol as a raw material, and a key intermediate product compound II can be obtained with higher yield. Due to the existence of tertiary butyl, the generation of a byproduct 2, 4-dihydroxybenzoic acid in the Kolbe-Schmitt reaction can be effectively prevented. And removing the tert-butyl group to obtain the 2, 6-dihydroxybenzoic acid. According to the method, corrosion of molten reactants to equipment in a solvent-free method is avoided, the production safety is improved, the reaction time is shortened, and the energy consumption is reduced. And the reaction does not need complex post-treatment, the final product 2, 6-dihydroxybenzoic acid can be obtained with extremely high yield and purity, the utilization efficiency of equipment is improved, and the production period is shortened.

The present application relates to the field of textiles, and specifically discloses a kind of different shrinkage polyester low-elastic yarn and its preparation process, and its preparation process comprises the following steps: using aliphatic diol and aromatic acid as raw materials to carry out esterification reaction to obtain polyester raw materials; modifying the polyester raw materials with a regulator containing at least magnesium hydroxide whiskers and p-hydroxybenzoic acid to obtain primary modified polyester; mixing the primary modified polyester with apocynum fiber powder, modified organic bentonite and a compatibility promoter to carry out modification to obtain melt granulation to obtain modified polyester masterbatch; spraying the obtained modified polyester masterbatch and polyester chips from a convex-shaped spinneret hole, passing through an ultra-short windless zone under a spray washing plate, and then cooling and solidifying in a gradient-distributed uneven manner, and then undergoing low-temperature elasticization treatment to obtain different shrinkage polyester low-elastic yarn; the present application also discloses the different shrinkage polyester low-elastic yarn obtained by the above process, and the present application has the characteristics of having a far-infrared emission function on the basis of obtaining a single-component different shrinkage polyester low-elastic yarn.

The invention discloses a PVDF / PFA composite filter material for sewage treatment and a preparation method of the PVDF / PFA composite filter material, and relates to the technical field of water treatment. When the filtering material is prepared, firstly, N-propenylimidazole and 1-chloro-3-phenylpropane react to prepare vinyl imidazolium salt, PVDF subjected to alkali treatment is grafted with the vinyl imidazolium salt, then the PVDF and 5-aza-uracil react, and modified PVDF is obtained; secondly, enabling resorcinol, 3, 5-dihydroxybenzoic acid and formaldehyde to react to obtain porous microspheres, and sulfonating the porous microspheres through chlorosulfonic acid to obtain modified microspheres; finally, PVDF, PFA, polyoxyethylene and the modified microspheres are mixed and subjected to melt spinning, and a fiber membrane is prepared; and carrying out in-situ generation of ferroferric oxide, and activating with hypochlorous acid to obtain the PVDF / PFA composite filter material for sewage treatment. The filter material prepared by the invention has good antibacterial, hydrophilic and photocatalytic degradation properties.

The present invention discloses a fermentation method for Antrodia camphorata mycelium and an auxiliary composition for fermentation of Antrodia camphorata. The method provided by the present invention comprises the following steps: S1. subjecting an Antrodia camphorata strain to liquid fermentation for 60-120 hours; S2. adding precursors to the fermented Antrodia camphorata strain liquid fermentation broth, and continuing the fermentation for more than 120 hours to obtain Antrodia camphorata mycelium; the precursors being coenzyme Q0, p-hydroxybenzoic acid, linalool, and α-terpineol, and the fermentation broth after adding the precursors having a coenzyme Q0 content of 100-500 mg / L, a p-hydroxybenzoic acid content of 20-300 mg / L, a linalool content of 0.1-0.5 mg / L, and an α-terpineol content of 0.3-0.7 mg / L. This method adds precursor substances of specific composition and concentration to the liquid fermentation broth of Antrodia cinnamomea at a certain time and combines them with each other, which is beneficial to the secondary metabolism of Antrodia cinnamomea and promotes the synthesis of triterpenoid compounds, thereby increasing the yield. Compared with the existing technology, the yield of triterpenoid compounds produced by Antrodia cinnamomea mycelium is increased, the culture cycle is shortened, and it is more suitable for large-scale production.

The invention discloses a perovskite solar cell and a preparation method thereof, the preparation method comprises a step of preparing a perovskite light absorption layer, and the step of preparing the perovskite light absorption layer comprises the following steps: spin-coating a dissolved lead iodide precursor solution on a substrate with a carrier transport layer deposited on the surface, and carrying out heating treatment to prepare a lead iodide film; spin-coating the lead iodide thin film with an organic halogenated ammonium salt solution containing a hydroxybenzoic acid cross-linking agent, and carrying out heating treatment to obtain a perovskite thin film; wherein the hydroxybenzoic acid cross-linking agent at least comprises hydroxyl, carboxyl and a benzene ring. The performance of the perovskite light absorption layer prepared by the method is obviously improved.

The invention discloses a construction method and application of a specific chromatogram of a Shanhaidan pharmaceutical preparation, and belongs to the technical field of traditional Chinese medicine detection. The method comprises the following steps: preparing a test solution by using a plurality of different batches of Shanhaidan medicinal preparations in combination with high performance liquid chromatography and mass spectrometry technologies; the preparation method comprises the following steps: preparing a single reference substance solution from uridine, tanshinol, daidzin, p-hydroxybenzoic acid, puerarin, caffeic acid, 3 '-hydroxy puerarin, physcion, calycosin-7-O-beta-D-glucoside, stilbene glucoside, rosmarinic acid, alkannic acid, formononin, salvianolic acid B, daidzein and calycosin-7-one; and respectively carrying out high performance liquid chromatography analysis on the test solution and the reference solution to obtain the characteristic chromatogram of the Shanhaidan pharmaceutical preparation. The method is simple and convenient to operate, high in precision, good in reproducibility and accurate and reliable in result. And at least 16 components can be identified at one time under the same chromatographic condition, so that the detection efficiency is remarkably improved, the time and the cost are saved, and the quality of the Shanhaidan pharmaceutical preparation is comprehensively and scientifically evaluated.

The invention provides a corrosion-resistant film, a pipe and a preparation method and application of the corrosion-resistant film, the corrosion-resistant film at least contains modified LCP, the modified LCP comprises p-hydroxybenzoic acid, 6-hydroxy-2-naphthoic acid and 3, 4-dihydroxythiophene methyl diformate, the p-hydroxybenzoic acid, the 6-hydroxy-2-naphthoic acid and the 3, 4-dihydroxythiophene methyl diformate are used as raw materials, and the 6-hydroxy-2-naphthoic acid and the 3, 4-dihydroxythiophene methyl diformate are used as raw materials. And the molar ratio of the 2, 4-dihydroxy thiophene methyl dicarboxylate is (60-80): (5-40): (0.5-3). The corrosion-resistant thin film provided by the invention is excellent in mechanical property and corrosion resistance, and the corrosion-resistant pipe provided by the invention is high in combining capacity with the thin film and good in corrosion resistance.

The invention discloses an anti-UV hydrolysis-resistant PET functional master batch and a preparation method thereof, UV absorbing groups such as isophorone diester and 2, 4-dihydroxybenzoic acid are introduced to enhance the UV resistance, and neopentyl glycol and trimethylolpropane are introduced to enhance the hydrolysis resistance of a molecular chain. Besides, the Beta molecular sieve, the zinc metaborate and other auxiliaries are utilized, so that the uniform distribution of the light stabilizer and the ultraviolet light absorber in the molecular structure is improved, and the problem that the UV absorption performance and the hydrolysis resistance of the film are not uniform due to molecular arrangement change in the stretching process is effectively avoided. The ultraviolet resistance, the strength and the hydrolysis resistance of the film are improved through the synergistic effect of all the components in the formula, so that the application requirements of PET products in the fields of packaging, electronics, photovoltaics, automobiles, medical instruments and the like are met.

Disclosed herein is a photosensitive composition comprising a) at least one photoacid generator; b) at least one Novolak polymer; c) at least one acrylate polymer, comprising a component having structure (I); d) at least one glycidyl hydroxy benzoic acid condensate material comprising one or more compounds having structure (II); e) at least one heterocyclic thiol compound comprising a ring structure chosen from the general structures (III), (IIIa) or (IIIb); and f) at least one solvent. Disclose herein are also the methods of using this composition to form a resist pattern and the methods of using these resist patterns to produce metal lines. Disclosed herein are also compounds and mixtures of compounds having structure (II).