40 results about "Isocaproic acid" patented technology

The invention discloses an oxidation kettle and a method for preparing an isocaprylic acid intermediate product sodium isocaprylate, the oxidation kettle comprises a kettle body and a jacket fixedly sleeved outside the circular outer part and the bottom end of the kettle body, a sealing seat is arranged at the center of the top end of the kettle body, a speed reducer is fixed at the top end of the sealing seat through a flange and a screw, and a speed reduction shaft of the speed reducer penetrates through the sealing seat; a speed reducer is arranged in the kettle body, the top end of the speed reducer is in transmission connection with a stirring motor, the stirring motor is electrically connected with an external power supply through an electric wire, and a stirring shaft is vertically arranged at the center of the kettle body. According to the device, the stirring effect on fluid in the kettle body can be enhanced through automatic up-down swinging of the metal stirring rollers, synchronous swinging of the multiple stirring rollers is achieved through the linkage mechanism, stable and controllable swinging action is ensured through the driving mechanism, the mixing uniformity and reaction efficiency of materials in the oxidation kettle are remarkably improved, and the production cost is reduced. And the stirring requirements of high-viscosity and easily-layered materials are met. The oxidation kettle can be used for preparing an isocaprylic acid intermediate product sodium isocaprylate.

The application provides a method for preparing lithium iron phosphate by using waste lithium isooctanoate catalyst, and comprises the following steps: grinding and sieving the waste lithium isooctanoate catalyst to obtain lithium isooctanoate powder; mixing the lithium isooctanoate powder with water, adding concentrated hydrochloric acid to perform leaching reaction to obtain leaching slurry; filtering the leaching slurry to obtain filtrate and residue; adding activated carbon to the filtrate to perform adsorption and filtration, then adding HCl and FeCl3·6H2O to stir, and controlling the pH of the solution to be 1.0-1.5 to obtain an aqueous phase; uniformly mixing tributyl phosphate and sulfonated kerosene to obtain an organic phase; mixing, oscillating, standing and separating the aqueous phase and the organic phase to obtain an extraction phase and a raffinate phase; washing the extraction phase by using dilute hydrochloric acid to remove impurities, adjusting the molar ratio of P, Fe and Li in the extraction phase after impurity removal, adding a carbon source to obtain mixed slurry; performing spray drying on the mixed slurry, and performing high-temperature sintering, crushing and screening on the powder obtained by spray drying to remove iron, so as to obtain lithium iron phosphate. The application scheme realizes resource recycling and utilization, and the prepared product has high quality and low cost.

The invention relates to the field of lubrication of ball screws, in particular to long-life creep-resistant lubricating grease for a high-precision ball screw, which comprises the following components in parts by weight: 65 parts of polyolefin, 5-10 parts of pentaerythritol ester, 5-10 parts of isocyanate, 2-5 parts of amine chain extender, 5 parts of PTFE (polytetrafluoroethylene), 1.0-1.5 parts of diphenylamine, 0.1-0.5 part of 2, 4-diphenyl-1, 3-pentanediol monoisobutyrate, 0.1-0.5 part of antioxidant, 0.1-0.5 part of antioxidant and 0.1-0.5 part of lubricant. The composite material is prepared from the following components in parts by weight: 0.5 to 1 part of 2, 6-butylated hydroxytoluene, 1.5 to 2 parts of molybdenum isocaprylate, 0.5 to 1 part of molybdenum bis (2-ethylhexyl) dithiocarbamate, 1 to 2 parts of zinc dialkyl dithiophosphate, 3 parts of calcium petroleum sulfonate, 1 to 1.5 parts of polyisobutene, 0.2 to 0.5 part of benzotriazole and 0.1 to 0.3 part of polymethacrylate. The isocyanate comprises HDI and IPDI, and the amine chain extender comprises TETA and TEPA. According to the invention, isocyanate and the amine chain extender react to form a polyurea macromolecular chain, and a high-energy hydrogen bond network is formed, so that the lubricating grease has relatively high creep resistance; the anti-creep performance is further enhanced through cooperation with the PTFE particles; meanwhile, through cooperation with diphenylamine, the oxidation resistance is promoted, the consumption is reduced, and the service life of the lubricating grease is longer.

The application discloses a high-flash-point fireproof coating based on heat-resistant phenyl phosphine oxide and a preparation method thereof, and relates to the technical field of fireproof and flame-retardant coating.The high-flash-point fireproof coating based on heat-resistant phenyl phosphine oxide comprises the following components in parts: heat-resistant phenyl phosphine oxide 10-15 parts, cobalt isooctoate 1-3 parts, methyl ethyl ketone peroxide 0.2-1 part, epoxy resin 140-160 parts and curing agent 90-110 parts; the epoxy resin is epoxy resin 828 or epoxy resin 815 or epoxy resin C 14 H 20 O4.The heat-resistant phenyl phosphine oxide contains phosphorus with flame-retardant effect and has a high thermal decomposition temperature; as a flame-retardant additive, the heat-resistant phenyl phosphine oxide can improve the thermal stability of the coating, thereby avoiding early degradation of the polymer and improving the flash point of the coating, and the flash point is greater than 60 DEG C.

The application discloses a resin gold paste suitable for a printing transfer process, wherein the resin gold paste is composed of the following components in mass fraction: 20-50% of vulcanized benzoin gold, 0.5-3% of bismuth cyclopentanate, 0.1-1% of copper isooctanoate, 0.1-1% of rhodium isooctanoate, 5-30% of a high polymer resin, 0.3-4% of an additive and the rest of a solvent; the additive is composed of an additive A and an additive B, the additive A is one or more of polyethylene wax paste, polyamide wax paste, bentonite and hydrogenated castor oil, the additive B is one or more of a silicone lubricant, stearic acid amide and oleamide, and the mass ratio of the additive A to the additive B is 1:0.3-0.4. The resin gold paste is particularly suitable for the printing transfer process, has good printing performances such as rheological properties and screen passing properties, effectively reduces the phenomena of plate sticking, screen blocking and broken lines during continuous printing, and has high printing resolution, and is particularly suitable for being used as the resin gold paste for the printing transfer process.

The invention discloses application of a nutritional composition containing alpha-hydroxyisocaproic acid in weight management and blood fat improvement, and belongs to the fields of biological medicine manufacturing, biological medicine application and functional food development. The nutritional composition comprises alpha-hydroxyisocaproic acid and at least one second functional nutritional component, and the second functional nutritional component is preferably selected from one or more of the following components: 1) one or more of tea polyphenol and capsaicin; 2) one or more of beta-glucan, inulin and resistant dextrin; 3) one or more of medium chain triglyceride and sn-1, 3 diglyceride; under the condition of the same intake cycle and dosage, the nutritional composition can significantly improve the weight management effect and reduce related indexes of blood fat through a multi-way synergistic effect, and is combined with GLP-1 drugs or sequentially applied to weight management so as to reduce the risk of weight rise after drug withdrawal.

The invention provides an ultrahigh-base-number composite calcium salt detergent, a preparation method thereof and a lubricating oil complexing agent. The preparation method comprises the following steps: mixing solvent oil, base oil, an accelerant A, an accelerant B, sulfonic acid, salicylic acid, first inorganic calcium and an accelerant C for neutralization reaction; carbon dioxide is introduced, second inorganic calcium and water are added for a carbonation reaction, a product is purified after the reaction is finished, and the composite calcium salt detergent is obtained; the accelerant B is selected from a combination of two or more than three of polyisobutylene succinic anhydride, dodecenyl succinic anhydride, polymethacrylate, trimethylolpropane isooctoate, alkylphenol formaldehyde resin and benzylamine. The composite calcium salt detergent disclosed by the invention has the advantages of ultrahigh base number and better thermal stability, and can fundamentally improve the problem of precipitation when calcium sulfonate and calcium salicylate are compounded.

The application relates to the chemical process field and discloses a catalyst with a function of reducing chroma and a method for preparing isooctanoic acid. The catalyst and the method for synthesizing isooctanoic acid can reduce the chroma of isooctanoic acid products and downstream products prepared by using isooctanoic acid as raw materials after long-time storage, improve product quality, reduce the requirement of the raw material storage environment, thereby reducing the cost and improving the benefit.

An unsaturated polyester resin for diamond resin and its preparation method are disclosed, belonging to the technical field of polyester resins. It is composed of the following components: maleic anhydride, DCPD, DEG, EG, antioxidant, polymerization inhibitor, paraffin wax, styrene, composite accelerator, and water; the composite accelerator is composed of cobalt isooctanoate, copper isooctanoate, and potassium isooctanoate in a weight ratio of 1:2 to 4:6. The preparation steps are: 1) Add maleic anhydride, DEG, antioxidant, and water; heat and add DCPD, maintaining the temperature; 2) Add EG, MA, DEG, antioxidant, and polymerization inhibitor; heat and react; 3) Cool and add polymerization inhibitor and paraffin wax; cool and add styrene and the composite accelerator to obtain the unsaturated polyester resin for diamond resin; the composite accelerator is obtained by premixing cobalt isooctanoate, copper isooctanoate, and potassium isooctanoate in a weight ratio of 1:2 to 4:6 at 25 to 60°C. This invention features excellent mechanical properties, good air-drying properties, high solids content, and low linear shrinkage.

The invention relates to PBAT (poly (butylene adipate-co-terephthalate)) resin for a full-biodegradable mulching film and a synthesis method thereof. The invention discloses PBAT resin for a full-biodegradable mulching film. The PBAT resin is prepared from the following raw materials: an AA esterification raw material, a PTA esterification raw material and a pre-polycondensation auxiliary agent, the AA esterification raw materials comprise adipic acid, 1, 4-butanediol, a compound catalyst and an auxiliary agent 1; the auxiliary agent 1 is prepared from ethyl orthosilicate and zinc isoocatanoate; the PTA esterification raw materials comprise terephthalic acid, 1, 4-butanediol, a compound catalyst and an auxiliary agent 2; the auxiliary agent 2 is ethyl orthosilicate; the compound catalyst is a titanium phosphorus compound catalyst; the pre-polycondensation auxiliary agent is an antioxidant and aluminum-magnesium hydrotalcite. According to the PBAT resin for the full-biodegradable mulching film and the synthesis method of the PBAT resin, on the basis of an existing PBAT conventional catalytic system, different functional auxiliaries are introduced in different stages, and the mechanical property, the water retention capacity and the hydrolysis resistance of the polymerized PBAT resin are effectively improved through the synergistic effect of the different functional auxiliaries.

The invention discloses a polyurethane adhesive as well as a preparation method and application thereof. The polyurethane adhesive disclosed by the invention is prepared from a prepolymer, toluene triisocyanate TTI, a composite regulator and a carboxyl modifier, the preparation method of the prepolymer comprises the following steps: reacting dimethylolpropionic acid, isocyanate and polyol to prepare the prepolymer; the composite regulator comprises bismuth isooctoate and caprolactam; the carboxyl modifier is selected from one or a mixture of more than two of succinic acid, adipic acid and citric acid. The opening time of the polyurethane adhesive disclosed by the invention is obviously shortened to 10-25 minutes, so that the polyurethane adhesive is suitable for rapid construction requirements; the tensile shear strength of the polyurethane adhesive is 6-14 MPa and is improved by 15% or above compared with that of a traditional polyurethane adhesive, the interface peel strength is 15-22 N / mm and is improved by 20% or above when the polyurethane adhesive is used for bonding a metal base material, and the elongation at break is 450% or above.

The invention discloses a liquid barium-zinc stabilizer and a preparation method and application thereof, and the liquid barium-zinc stabilizer is prepared from the following raw materials in parts by weight: 5-15 parts of oleic acid, 5-20 parts of p-tert-butylbenzoic acid, 2-8 parts of isocaprylic acid, 5-10 parts of diethylene glycol butyl ether acetate, 5-10 parts of cycloalkane, 5-10 parts of D80, 2-5 parts of zinc oxide, 4-10 parts of barium hydroxide monohydrate, 10-20 parts of barium salt and 2-6 parts of dibenzoylmethane. 15-25 parts of phenol-free phosphite ester and 2-6 parts of an antioxidant. The liquid barium-zinc stabilizer prepared by the invention cannot be subjected to curing reaction with an adhesive to cause degumming, and has excellent heat resistance and heat-resistant stability.

The invention belongs to the technical field of refrigerating machine oil, and particularly relates to isocaprylic acid and isononanoic acid triglyceride and application thereof. The isocaprylic acid and isononanoic acid triglyceride comprises the following raw materials: isocaprylic acid, isononanoic acid, glycerol, an adsorbent and a catalyst, wherein the molar ratio of the isocaprylic acid to the isononanoic acid is 6: (9-14). By adjusting the ratio of isocaprylic acid to isononanoic acid in the raw materials of the isocaprylic-isononanoic triglyceride, the lubricating property of the isocaprylic-isononanoic triglyceride obtained by the reaction is improved, so that the lubricating property, glossiness and air permeability of the isocaprylic-isononanoic triglyceride are similar to or even slightly superior to those of caprylic-capric triglyceride when the isocaprylic-isononanoic triglyceride is used for cream cosmetics.

The application provides a refrigeration machine oil base oil, a refrigeration machine oil, a fluid composition and a refrigeration compressor. The refrigeration machine oil base oil comprises a first polyol ester, which is obtained by esterification reaction of adipic acid and iso-octanoic acid with pentaerythritol and then removal of acid by a neutralizing agent. The refrigeration machine oil base oil has excellent rheological properties, refrigerant compatibility and friction performance, has a low acid value, reduces corrosion of compressor pump body parts, and one of raw materials of the first polyol ester of the refrigeration machine oil base oil is adipic acid, so that a polymerized long-chain structure is generated, and the friction performance of the lubricating oil is improved.

The application provides a spherical potassium clavulanate, a preparation method thereof and a compound preparation. The spherical potassium clavulanate has a spherical diameter of 25-150 microns. The preparation method of the spherical potassium clavulanate is as follows: 1. Dissolving a tertiary butylamine salt in an organic solvent to obtain an amine salt solution; 2. Preparing a potassium isooctanoate solution by dissolving potassium isooctanoate in an appropriate amount of organic solvent; 3. Removing carbon in the solution by adding activated carbon into the amine salt solution, stirring, filtering and washing the carbon with a small amount of organic solvent; 4. Crystallizing by controlling the temperature of the crystallization solution at 16-20 DEG C, stirring and adding the potassium isooctanoate solution at a constant speed; after the addition is completed, the temperature is lowered to 2-6 DEG C, and the stirring and heat preservation are performed for greater than or equal to 2 hours; 5. Filtering, washing and drying by filtering the crystallization solution, washing the solution with a solvent at 2-6 DEG C for 3-4 times, and vacuum drying the wet powder by cold pumping for 1 hour and drying at 35 DEG C for 6 hours. The spherical potassium clavulanate prepared by the method has uniform particle size distribution, good fluidity, easy dispensing and quality meeting the standard of the 2020 edition of the Chinese Pharmacopoeia.

The utility model provides an isocapryloyl chloride production system. The isocapryloyl chloride production system comprises a reaction unit, a tail gas treatment unit and a distillation unit, the reaction unit comprises a reaction kettle, a circulating pipeline, and a nitrogen supply pipeline, a solvent supply pipeline, a catalyst supply pipeline, an isocaprylic acid supply pipeline and a phosgene supply pipeline which are connected with the reaction kettle; the reaction kettle is provided with a tail gas outlet and an emergency gas release port which are connected with the tail gas treatment unit; a circulating inlet is formed in the side wall of the reaction kettle; the circulating pipeline is connected with the discharge hole and the circulating inlet; a pipeline, extending into the reaction kettle, of the isocaprylic acid supply pipeline is of a sleeve structure, and isocaprylic acid enters from an inner pipe; the nitrogen supply pipeline and the phosgene supply pipeline both extend into the bottom of the inner cavity of the reaction kettle, and the phosgene supply pipeline is also communicated with the outer pipe of the sleeve structure; and a non-condensable gas outlet of the distillation unit is connected with the tail gas treatment unit. The isocapryloyl chloride production system disclosed by the utility model is good in tail gas treatment effect, reactants can be fully mixed, and the phosgene content in reaction completion liquid is reduced.

The invention belongs to the technical field of chemical synthesis, and discloses a cefotaxime sodium synthesis method based on one-step salification of a mixed solvent system and sodium isooctanoate. The method comprises the following steps: by taking 7-aminocephalosporanic acid (7-ACA) and 2-(2-aminothiazole-4-yl)-2-(methoxyimino) acetoxyimino ethyl acetate (AE active ester) as raw materials, in a dichloromethane-methanol mixed solvent, completing a condensation reaction through triethylamine catalysis, directly dropwise adding a sodium isooctanoate acetone solution to realize salification in one step, and carrying out post-treatment to obtain the 7-aminocephalosporanic acid (7-ACA)-2-(methoxyimino) acetoxyimino ethyl acetate (AE active ester)-2-(methoxyimino) acetoxyimino ethyl acetate (AE active ester). The cefotaxime acid intermediate does not need to be separated; and performing low-temperature washing and accurate drying subsequently to obtain a cefotaxime sodium finished product. According to the method, the defects that in the prior art, a two-step method needs intermediate separation and a one-pot method needs alkaline degradation are overcome, the production period is shortened to be smaller than or equal to 8 h, the total yield is larger than or equal to 92%, the HPLC purity is larger than or equal to 99.6%, the wastewater COD is smaller than or equal to 2000 mg / L, solvent residues meet the ICH Q3C standard, and the method has the advantages of industrial feasibility and environmental protection.

This invention discloses a highly efficient catalytic synthesis method for isooctanoic acid, belonging to the field of isooctanoic acid preparation technology. The highly efficient catalytic synthesis of isooctanoic acid includes the following steps: N1: Mixing n-butyraldehyde and a bifunctional solid catalyst, introducing hydrogen gas, and heating to 110-130℃ for 5-7 hours, followed by post-treatment to obtain isooctaldehyde; adding a phosphomolybdate catalyst to isooctaldehyde, introducing air, stirring, and heating to 50-60℃ for 3-5 hours, followed by post-treatment to obtain isooctanoic acid; the bifunctional solid catalyst is Ni / MgO-TiO2; the phosphomolybdate catalyst is Cs. 1.5 H 1.5 PMo 12 O 40 @SiO2. The preparation process of isooctanoic acid in this invention exhibits good n-butyraldehyde conversion and yield, and the catalyst is easily recovered and reused, which is beneficial for industrial conversion applications.

The invention discloses spherulitic cloxacillin sodium and a preparation method thereof, and belongs to the field of medicine synthesis. The spherocrystal is a spherical polycrystalline aggregate which is formed by radially growing towards each radial direction by taking a crystal nucleus as a center. The preparation method comprises the following steps: taking 6-APA, o-chloroacyl chloride and sodium isooctanoate as initial raw materials; the method comprises the following steps: adding water, NaOH and other solutions into 6-APA to form a 6-APA dissolving unit, then adding an o-chloroacyl chloride acetone solution to form an acylation unit solution, then adding dichloromethane, carrying out phase splitting, and then adding acetone into a lower layer phase to form an extraction unit solution; meanwhile, an acetone aqueous solution of sodium isooctanoate is used as a crystallization base solution. In the crystallization process, a part of the extraction unit solution is rapidly pre-added into a crystallization base solution, a seed crystal is added for pre-crystal growing, then the remaining extraction unit solution is added to complete a crystallization reaction and crystal growing, and the water mass is controlled to be 3%-8% in the crystallization process; and carrying out elution, filtration, washing and drying to obtain cloxacillin sodium spherulites. The method disclosed by the invention has the characteristics of easiness in suction filtration, low impurity content and high yield, and can obviously shorten the production period, improve the yield and improve the product quality.

The application provides a fluorinated cyclodextrin macromolecular adsorbent and a preparation method and application thereof, and belongs to the technical field of lithium ion adsorbents, and aims to solve the technical problems of poor lithium ion adsorption effect and low selectivity of existing lithium adsorbents. The preparation steps of the application comprise the following steps: firstly, dissolving beta-cyclodextrin in an organic solvent and reacting with 2-bromoisobutyryl bromide to obtain an intermediate product bromoisobutyryl beta-cyclodextrin; and then, performing a polymerization reaction on the bromoisobutyryl beta-cyclodextrin with a fluorine-containing monomer, copper bromide, N,N,N',N",N"-pentamethyldiethylenetriamine and tin (II) isooctoate to obtain a beta-cyclodextrin adsorption material with a surface grafted fluorine-containing polymer chain. The preparation method has the advantages of simple process and mild reaction conditions. The adsorption material has a high lithium ion adsorption capacity, which can reach 43.5 mg / g, and can efficiently and selectively recover lithium ions from a complex solution containing competitive ions such as sodium, potassium, magnesium, calcium and cobalt.

The invention relates to the technical field of cephalosporin antibiotics, and particularly discloses a preparation method of a cefazolin sodium anhydride. The preparation method comprises the following steps: adding an alcohol solvent and a sodium isooctanoate alcohol solution into a cefazolin organic amine salt solution, then adding a cefazolin sodium hydrate seed crystal, carrying out a double decomposition reaction, and carrying out cooling crystallization to obtain the cefazolin sodium hydrate, and adding the cefazolin sodium hydrate into water for injection, and freeze-drying to obtain the cefazolin sodium anhydride. According to the method, an organic amine salt solution does not need to be subjected to aluminum oxide column purification, cefazolin organic amine salt and sodium isooctanoate are directly subjected to double decomposition reaction, cefazolin sodium hydrate is subjected to supersaturation precipitation in an alcohol solvent, the production efficiency is improved, and the product yield loss caused by the purification process is avoided; the water for injection is directly used for dissolving the cefazolin sodium hydrate, the situation that cefazolin acid is prepared firstly and then dissolved with strong base is avoided, the synthesis route is shortened, meanwhile, beta-lactam ring degradation caused in the alkaline dissolution process is avoided, and the product quality is improved.

The present application relates to heavy-duty anticorrosive coating technical field, specifically to a kind of graphene reinforced epoxy modified silicone resin heavy-duty anticorrosive powder coating, by weight parts, consisting of following components: epoxy group epoxide modified silicone resin 42-58 parts, hydroxylated graphene 0.8-2.5 parts, nano zirconium dioxide coated boron nitride 6-11 parts, lanthanum isooctanoate-titanate complex coupling agent 2.5-5.5 parts, bis (3-triethoxysilane propyl) disulfide 1.5-3.5 parts, cage silsesquioxane 4-7 parts, curing agent 5-8 parts, leveling agent 0.8-1.8 parts, defoaming agent 0.4-0.9 parts, polyether ether ketone micro powder 2.5-4.5 parts, fluorine-containing phosphate 1.2-2.8 parts.The present application is modified by chemical bridging resin, and modified graphene and nano-coated powder are used to build synergistic reinforcement system, and the interface is optimized by composite coupling agent.Adhesion, corrosion resistance and mechanical properties of the coating are excellent, processing fluidity is good, aging resistance and thermal stability are strong, traditional product performance short board is solved, and industrialization demand is adapted.

This invention relates to a method for the catalytic preparation of 1,5-pentamethylene diisocyanate trimer, belonging to the field of organic synthesis and polymer materials technology. Addressing the problems of poor catalyst selectivity and the tendency to generate pentamers and higher polymers in existing PDI trimer synthesis processes, leading to increased product viscosity and decreased NCO content, this invention proposes using potassium isooctanoate catalyst under nitrogen protection. The purified PDI monomer is heated to 90°C, and 0.8‰ (based on the mass of PDI monomer) of catalyst is rapidly added dropwise. The reaction is controlled until the NCO conversion reaches 30%, then a terminator is added to terminate the reaction, followed by molecular distillation to remove residual monomers. Gel permeation chromatography (GPC) analysis shows that the obtained product contains 29.46% trimer, and the contents of pentamers, heptamers, and high polymers (n≥9) are 5.74%, 2.12%, and 5.90%, respectively. This invention achieves highly selective synthesis of PDI trimer, producing a product with low viscosity and high NCO content, which can be used as a curing agent for high-performance polyurethane coatings and has promising industrial application prospects.

This invention discloses a method for preparing molybdenum isooctanoate catalyst with high molybdenum content using a bubbling process. The method employs nitrogen bubbling and hydrogen reduction techniques. Nitrogen bubbling rapidly removes water vapor and acetic acid generated during dehydration from the reaction system, which is more efficient and stable than static heating or slow vacuuming. It also aids in mixing, ensuring more thorough contact of reactants and inhibiting excessive aggregation of molybdenum species. Nitrogen bubbling provides an inert environment, maintaining the stability of the reaction system. Hydrogen reduction effectively suppresses acetylation side reactions and precipitation formation, and precisely guides the formation of highly dispersed dimer or oligomer structures. The molybdenum isooctanoate catalyst prepared by this process exhibits high stability, high dispersibility, and high molybdenum content.

The invention relates to the technical field of electronic packaging materials, and discloses a high-peel-strength transparent flexible copper-clad plate and a production process thereof.The copper-clad plate comprises a flexible copper foil and an adhesive layer, and the adhesive layer is formed by curing biphenyl epoxy resin, modified polyvinyl butyral resin prefabricated liquid, methylhexahydrophthalic anhydride and a silane coupling agent; the prefabricated liquid is prepared from PVB, a solvent, zinc isoocatanoate and acetylacetone. A latent catalytic system formed by zinc isoocatanoate and acetylacetone is utilized, catalytic activity is shielded through coordination at normal temperature, and the working life of a glue solution is prolonged; during high-temperature lamination, an active center is dissociated and released, and PVB hydroxyl and epoxy resin are catalyzed to be subjected to in-situ chemical grafting. According to the scheme, microscopic phase separation in the curing process is effectively inhibited, the lamination bubble defect is eliminated from the source while the high transparency of the adhesive layer is ensured, and the interface peel strength and heat aging resistance of the copper-clad plate are improved.

The application relates to the chemical process field and discloses a method for hydrofining isooctanoic acid, which comprises the following steps: in the presence of a reduction catalyst, crude isooctanoic acid is contacted with hydrogen to perform a reduction reaction. By using the method for hydrofining isooctanoic acid provided by the application, the product quality can be improved by completely removing substances containing carbon-carbon double bonds and aldehyde ketone carbonyl in the reaction system, the product can keep stable for a long time, the content of isooctanoic acid isooctyl ester in heavy components obtained through rectification is obviously reduced, the residual liquid after separation of isooctanoic acid only contains isooctanoic acid and a catalyst, and the residual liquid can be directly recycled as the catalyst without separation and purification, so that the operation process is simplified.

The application discloses a low-roughness dispersion resin for electrophoretic paint, preparation of the dispersion resin and an electrophoretic color paste, electrophoretic paint containing the dispersion resin. The dispersion resin comprises 8.91-9.60 parts by weight of aromatic epoxy resin, 12.00-13.09 parts by weight of aliphatic epoxy resin, 2.53-3.01 parts by weight of bisphenol A, 2.07-2.27 parts by weight of iso-octanoic acid, 0.06-0.08 parts by weight of a catalyst, 1.99-2.30 parts by weight of a primary amine, 0.85-0.96 parts by weight of a neutralizing agent and 66.56-73.80 parts by weight of pure water. The electrophoretic paint prepared from the dispersion resin has excellent edge protection capability and low surface roughness, and can meet the requirements of a whole vehicle body on a bottom electrophoretic coating under current zirconium or silane thin film pretreatment conditions.

This invention provides an ultra-thin, ultra-fast repair material for MMA polymer pavement, along with its preparation and application methods. The material comprises component A and component B. Component A includes methyl methacrylate, acrylic resin, n-butyl methacrylate, 2-ethylhexyl acrylate, urethane acrylate, hydroxypropyl methylcellulose, a composite reinforcing agent, pigments, an ultraviolet shielding agent, and a dispersant. Component B includes benzoyl peroxide, methyl ethyl ketone peroxide, cobalt naphthenate, zinc isooctanoate, and dibutyl phthalate. This ultra-thin, ultra-fast repair material, through optimization of the composite initiator-promoter system, extends the application temperature range to -30°C to 35°C, solving the problems of traditional materials being unable to be applied in winter and the poor durability of thin-layer repair materials. Furthermore, it maintains high curing speed, high strength, and high durability even at low temperatures.

The invention relates to the technical field of high polymer materials, and provides a printing polyvinyl chloride film for advertising cloth and a preparation method thereof. The inkjet polyvinyl chloride film for the advertising cloth comprises the following components in parts by weight: 100 parts of polyvinyl chloride, 30-45 parts of a plasticizer, 4-8 parts of a lubricant, 2-3 parts of a heat stabilizer, 8-12 parts of modified calcium carbonate and 0.5-1 part of superfine silica powder, a modifier of the modified calcium carbonate comprises isocaprylic acid and dodecanedioic acid. According to the technical scheme, the problem that the mechanical property of the inkjet polyvinyl chloride film for the advertising cloth in the prior art is insufficient is solved.