23 results about "Monobasic acid" patented technology

This application relates to a semi-continuous process for producing polyamide and a polyamide product, comprising the following steps: adding a batch of polyamide salt solution to a reactor for polymerization; after discharge, introducing steam containing a depolymerization aid into the reactor to depolymerize the residual material online, forming a prepolymer with a molecular weight of 2000-4000; wherein the mass concentration of the depolymerization aid in the steam containing the depolymerization aid is 0.1%-10%, the depolymerization aid is selected from organic monobasic acids, and the boiling point of the depolymerization aid is 100℃-180℃; then, the next batch of polyamide salt solution is directly added to the reactor, and polymerization and online depolymerization are carried out in a cyclical manner. The process provided by this application can significantly improve product quality, increase production efficiency and material utilization, effectively reduce the risk of reactor damage, and improve production safety.

The invention relates to the field of metal-organic framework materials, in particular to a metal-organic monoacid framework material, a coating composite film and a preparation method of the coating composite film. The metal-organic monoacid framework material is formed by metal ions, an organic ligand and a monoacid modifier through coordination, the metal ions are Zn < 2 + >, the organic ligand is 2-methylimidazole, and the monoacid modifier is oleic acid. The core composition of the metal-organic monoacid framework material is limited, and the metal-organic monoacid framework material is defined to be formed by specific metal ions, organic ligands and monoacid modifiers through coordination. According to the technical scheme, metal ions, organic ligands and monoacid modifiers which are specifically combined are selected, and a novel framework structure is constructed through the synergistic coordination effect of the metal ions, the organic ligands and the monoacid modifiers. The introduced monoacid modifier not only participates in coordination to form a stable skeleton, but also can endow the material with hydrophobic property through the structural characteristics of the monoacid modifier.

The invention belongs to the field of high polymer materials, and discloses a method for efficiently catalytically synthesizing polylactic acid, which is characterized by comprising the following steps: adding lactide, a tin catalyst and an initiator into a reactor, quickly heating to 180 + / -20 DEG C under the protective atmosphere and stirring, and carrying out polymerization reaction for more than 10 minutes to obtain high-molecular-weight polylactic acid; the initiator is hydroxy acid and is monobasic acid. The lactide polymerization rate is greatly improved, the polymerization reaction can be completed within more than ten minutes, the lactide conversion rate is 94% or above, the molecular weight is 2.17 * 10 < 5 > Da or above, and the lactide reaches the level of commercial polylactic acid. Compared with a tin catalyst and a tin catalyst / alcohol composite catalytic system, the catalytic system has the advantages that the polymerization rate at the initial reaction stage is increased by 20-30%, and the reaction time is shortened by more than 80%. The catalytic system is applied to a process for synthesizing polylactic acid through reactive extrusion, and the production efficiency of an extruder can be remarkably improved.

This application relates to a fluid water-in-oil emulsion comprising: A) at least one polyester, which is a reaction product of the following components (i), (ii) and (iii): (i) at least one polyglycerol-3; (ii) at least one dimer acid; and (iii) at least one fatty monocarboxylic acid having 8 to 30 carbon atoms, wherein the reacting components (i), (ii) and (iii) are in a molar ratio of 1 mole of polyglycerol-3, 0.5 to 1 mole of dimer acid, and 0.1 to less than 2.0 moles of fatty monocarboxylic acid; B) at least one continuous oil phase comprising: 1) at least one volatile hydrocarbon oil; and 2) optionally at least one non-volatile oil; and C) at least one aqueous phase dispersed in the oil phase, wherein the liquid component of the aqueous phase accounts for at least 50% by weight of the total weight of the composition; and D) At least one nonionic surfactant with an HLB of less than 8.0, the chemical structure of which is generated by the reaction of at least one polyhydroxystearic acid and / or at least one polyricinoleic acid with a polyol containing at least two alcohol functional groups; the weight ratio of nonionic surfactant D) to polyester A) is greater than or equal to 0.9 and preferably greater than or equal to 1.0.

A lubricating oil composition may be superior in cooling performance, ensure electrical insulation, and have a high flash point. Such a lubricating oil composition may include a base oil (A) including an ester-based synthetic oil (A1), the content of the ester-based synthetic oil (A1) is 30% by mass to 100% by mass based on the total amount of the base oil (A), the ester-based synthetic oil (A1) is one or more of an ester (A1-1) of a monohydric alcohol and a monobasic acid and an ester (A1-2) of a monohydric alcohol and a polybasic acid, and the base oil (A) satisfies requirements (1) to (3): Requirement (1): the kinematic viscosity at 40° C. is 2.00 mm2 / s to 4.00 mm2 / s. Requirement (2): the specific heat at 20° C. is 1.75 kJ / (kg·K) or less. Requirement (3): the density at 20° C. is 0.850 g / cm3 or more.

The present application relates to a kind of aluminum alloy cleaning agent and its preparation method and application, aluminum alloy cleaning agent includes by weight percentage: chelating agent 0.1-0.5%, surfactant 4-8%, cleaning additive 6-12%, monobasic acid 5-10%, solubilizing agent 3-5%, the rest is water;Its advantages are that, using different surfactant fatty acid methyl ester ethoxylate and C9-11 ethoxylated alcohol: coconut alkyl quaternary amine ethoxylate mixture compound use, give consideration to wetting, emulsification, oil removal etc., not only clean thoroughly to the oil dirt on the surface of aluminum alloy, and the cleaning agent of the present application does not add aluminum corrosion inhibitor, strong alkali additive, does not contain phosphorus and silicon, friendly to environment, no corrosion to aluminum alloy, no residue, will not affect the performance of aluminum alloy, reduce the harm to human body, and wastewater treatment pressure, in the application of cleaning oil dirt on the surface of aluminum alloy and improving the service life of aluminum alloy cleaning agent has important value.

A process for the preparation of a 2,5-tetrahydrofurandimethanol difatty acid ester, comprising the following steps: providing a reaction system containing 2,5-tetrahydrofurandimethanol with a monobasic acid, wherein the structural formula of the monobasic acid is R-COOH, where R is an alkyl group from C5 to C20; esterification in the presence of a catalyst to obtain the 2,5-tetrahydrofurandimethanol difatty acid ester, wherein the catalyst is at least one of calcium acetate, tetraalkoxytitanium, manganese acetate, cobalt acetate, aluminum oxide, zinc oxide, and zinc-aluminum spinel; wherein the 2,5-tetrahydrofurandimethanol difatty acid ester has a structural formula as shown in Formula I, characterized in that the calcium acetate, tetraalkoxytitanium, manganese acetate, cobalt acetate, aluminum oxide, zinc oxide, and zinc-aluminum spinel have a particle size of have less than or equal to 80 mesh, and the reaction system includes a solvent,wherein the solvent is at least one of dimethyl sulfoxide and dimethylformamide.

The invention discloses a compound catalyst containing a deep eutectic solvent and an ionic liquid as well as a preparation method and application of the compound catalyst. The compound catalyst is prepared by mixing and compounding a quaternary ammonium salt compound, a polyol compound and an ionic liquid according to a mass ratio. The catalyst catalyzes the ring-opening esterification reaction of epoxy resin and unsaturated monobasic acid at 80-110 DEG C in the protective atmosphere of 95% nitrogen and 5% oxygen through a dual synergistic catalysis mechanism of the deep eutectic solvent and the ionic liquid, the reaction time is shortened to 2-8 hours, the chroma of a product is smaller than or equal to 2.5, the acid value is smaller than or equal to 2.5 mgKOH / g, the viscosity is 800-2000 mPa.s, and the batch stability is excellent. Compared with a traditional tertiary amine catalyst, the reaction temperature is reduced, and the chromaticity is reduced; compared with a single deep eutectic solvent or ionic liquid, the catalytic efficiency is improved by 50-80%, the synergistic interaction index reaches 113%, and the technical breakthrough of low-temperature, efficient and environment-friendly preparation of high-quality epoxy acrylate resin is realized.

The invention relates to a method for operating a hydraulic system comprising pressurizing a hydraulic fluid in the hydraulic system wherein the hydraulic fluid comprises a complex ester obtainable by reacting: a polyol selected from the group consisting of ethylene glycol, 1, 2-propanediol, 1, 3-propanediol, 1, 2-butanediol, 1, 3-butanediol, 2, 3-butanediol, 1, 3-butanediol, 1, 3-butanediol, 1, 3-butanediol, 1, 3-butanediol, 1, 3-butanediol, 1, 3-butanediol, 1, 3-butanediol, 1, 3-butanediol, 1, 3-butanediol, 1, 3-butanediol, 1, 3-butanediol, 1, 3-butanediol, 1, 3-butanediol the component A comprises 1, 3-butanediol, neopentyl glycol, trimethylolpropane, trimethylolethane, pentaerythritol, and dipentaerythritol; -a dibasic acid selected from the group consisting of aliphatic C3-C12 dicarboxylic acids; -a linear monoacid selected from the group consisting of linear aliphatic C6-C22 monocarboxylic acids; and-a branched monoacid selected from the group consisting of branched aliphatic C6-C12 monocarboxylic acids. The invention also relates to a hydraulic fluid.

The present application belongs to the technical field of anticorrosive coatings, and particularly relates to a styrene-maleic anhydride copolymer functionalized graphene oxide modified vinyl ester resin, a preparation method and application thereof. The styrene-maleic anhydride copolymer functionalized graphene oxide modified vinyl ester resin is prepared by adding part of reactants, i.e. unsaturated monobasic acid and epoxy resin as a diluent, so that the anhydride groups on the styrene-maleic anhydride copolymer functionalized graphene oxide and the hydroxyl groups on the acrylic ester monomer react, the anhydride ring-opening generates carboxylic acid groups, thereby participating in the subsequent reaction of carboxylic acid and epoxy, and finally the epoxy resin is capped with carboxylic acid to obtain the styrene-maleic anhydride copolymer functionalized graphene oxide modified vinyl ester resin. The cured film obtained by curing the styrene-maleic anhydride copolymer functionalized graphene oxide modified vinyl ester resin has excellent barrier properties, low surface energy, good corrosion resistance and excellent mechanical properties, and the reaction is prepared by one-pot method, the preparation process is simple, and the raw material utilization rate is high.

The objective is to provide an active energy ray curable overprint varnish that offers excellent misting properties and can provide a coating layer with higher gloss. [Solution] The reaction components include at least an acid-modified rosin, a monobasic acid having a cyclic structure, and a polyol having three or more hydroxyl groups in one molecule, and a polyester with an acid value of more than 10 mg KOH / g, A photopolymerization initiator, a (meth)acrylic monomer, An active energy ray curing overprint varnish and printed material characterized by containing 3 to 15% by mass of at least one extender pigment selected from the group consisting of calcium carbonate, silica, and magnesium carbonate, relative to the non-volatile components of the varnish.

Provided is a production method whereby it is possible to stably polymerize a polyimide having good properties while using a dimer diamine composition as a starting material. A method for producing a polyimide using the following: as a dimer diamine composition, (a) a dimer diamine; (b) a monoamine compound obtained by substituting a terminal carboxylic acid group of a monoacid compound having 10-40 carbon atoms with a primary aminomethyl group or an amino group; and (c) an amine compound obtained by substituting a terminal carboxylic acid group of a polyacid compound having a hydrocarbon group in the range of 41-80 carbon atoms with a primary aminomethyl group or an amino group (excluding the dimer diamine), the content of (a) being 96% by weight or more, and the total of (b) and (c) being 4% or less in terms of area fraction in a chromatogram as determined by GPC measurement.

The invention relates to the technical field of ceramic substrates, and provides a surface treatment process of a multilayer ceramic substrate, which comprises the following steps: S1, punching a ceramic substrate, and carrying out polishing, acid pickling, annealing and post-treatment to obtain a pretreated ceramic substrate; s2, performing surface metallization treatment on the pretreated ceramic substrate to obtain a metallized ceramic substrate; s3, after the metallized ceramic substrate is subjected to lamination pressing, conduction cutting and sintering, a multilayer ceramic substrate is obtained; the acid pickling comprises the following steps: sequentially soaking the ground ceramic substrate in a monobasic acid aqueous solution, a binary acid aqueous solution and a ternary acid aqueous solution, and drying. According to the technical scheme, the problem that the yield of the multi-layer ceramic substrate is low in the prior art is solved.

This invention relates to the field of ceramic substrate technology and proposes a surface treatment process for multilayer ceramic substrates, comprising the following steps: S1, after drilling holes in the ceramic substrate, it is polished, acid-washed, annealed, and post-treated to obtain a pretreated ceramic substrate; S2, the pretreated ceramic substrate undergoes surface metallization treatment to obtain a metallized ceramic substrate; S3, the metallized ceramic substrate undergoes lamination, conductive cutting, and sintering to obtain a multilayer ceramic substrate; the acid washing includes the following steps: the polished ceramic substrate is sequentially immersed in a monobasic acid aqueous solution, a dibasic acid aqueous solution, and a tribasic acid aqueous solution, and then dried. This technical solution solves the problem of low yield of multilayer ceramic substrates in related technologies.

The application relates to the technical field of insulating media, and particularly discloses a preparation method of a complex ester type high ignition point insulating medium, a preparation method of a complex ester type high ignition point insulating medium, which comprises the following steps: S1, mixing polyhydric alcohol, diacid, monobasic acid, a catalyst and a water carrying agent, and performing esterification reaction to obtain an esterification product; S2, performing vacuum distillation treatment on the esterification product to obtain a synthetic ester base oil; and S3, adding an antioxidant, a metal deactivator and an anti-hydrolysis agent into the synthetic ester base oil to obtain the insulating medium; the insulating medium has the advantages of excellent anti-combustion performance, good insulation and good low-temperature performance.

Provided are: a production method for a liquid containing a carboxyl group-containing resin, which is excellent in stability over time; and a stabilization method for a carboxyl group-containing resin. The production method for a liquid containing a carboxyl group-containing resin according to the present invention is characterized by comprising: a process A of synthesizing a first liquid containing a carboxyl group-containing resin by causing a reaction intermediate obtained by reacting an epoxy compound (a) with an unsaturated monobasic acid (b) to react with a polybasic acid dianhydride (c) and a polybasic acid monanhydride (d) in an organic solvent; and a process B of obtaining a second liquid containing a carboxyl group-containing resin by adding water to the aforementioned first liquid containing a carboxyl group-containing resin.

This invention belongs to the field of polymer materials technology, specifically relating to an imide-structured photosensitive developing resin, its preparation method, and its application. The raw material composition, by weight, includes: 2-6 parts polyamine, 6-20 parts dicarboxylic acid anhydride, 1-6 parts unsaturated monocarboxylic acid, 0.02-0.08 parts polymerization inhibitor, 0.02-0.08 parts catalyst, 2-10 parts hydrogen peroxide, 2-6 parts saturated sodium bicarbonate solution, 1-5 parts diethyl ether, 3-10 parts formic acid, 50-70 parts N-methylpyrrolidone, and 2-8 parts anhydrous zinc acetate. In this invention, the polyamine is first reacted with an alicyclic acid anhydride containing double bonds to generate a polyimide structure with double bonds at the end groups. The double bonds are then epoxidized, followed by ring-opening esterification with an unsaturated monocarboxylic acid, and then modified with an anhydride to introduce carboxyl groups, ultimately obtaining the imide-structured photosensitive developing resin. This resin has excellent electrical properties, heat resistance, good dimensional stability, excellent adhesion, and low dielectric constant, making it suitable for preparing IC substrate inks, printed circuit board solder resist inks, or chip photoresists.

The application provides an extreme pressure compound additive for lithium base grease, extreme pressure lithium base grease and a preparation method thereof. The extreme pressure compound additive for lithium base grease comprises a metal salt extreme pressure agent, a sulfur-containing extreme pressure agent and a boron-containing extreme pressure agent. The extreme pressure lithium base grease comprises base oil, a thickening agent and the extreme pressure compound additive for lithium base grease, and the thickening agent is prepared by reacting monobasic acid, lithium hydroxide and calcium hydroxide, wherein the monobasic acid is 12-hydroxystearic acid. The extreme pressure compound additive for lithium base grease provided by the application has a small total amount, and the preparation process is simple. Meanwhile, the extreme pressure lithium base grease prepared by the extreme pressure compound additive has excellent extreme pressure and anti-wear performance, is suitable for use in a high-load working environment, can effectively prolong the service life of lithium base grease, and the preparation method is simple and easy to operate.

The invention relates to an injection molding grade nylon 6 slice and a preparation method and application thereof, and relates to the technical field of new materials. According to the injection molding grade nylon 6 slice, monobasic acid is added as a molecular weight stabilizer in the caprolactam hydrolysis ring-opening polymerization process, the finally prepared slice has better viscosity stability, and the flowing property of a nylon melt is improved.

The application discloses a kind of halogen-free bio-based flame-retardant polyester polyols, by sik and monobasic acid, dibasic acid mixed preparation, using the cyclic structure of sik and its three functional degree hydroxyl structure can prepare the crosslinking degree moderate polyester polyols, the flame-retardant polyester polyols prepared in V-0 grade flame-retardant test shows excellent, also reduce the dependence on toxic flame retardant;In addition, the cyclic structure of sik and high nitrogen content help material form more dense crosslinking network after forming, give material better tensile strength and heat resistance, mechanical properties and flame-retardant effect are considered simultaneously.Part of trimethylolpropane can be used to replace sik, and cost and performance are considered.The application also provides an application of halogen-free bio-based flame-retardant polyester polyols, which is mixed with isocyanate to prepare polyurethane material.

The invention relates to the technical field of ruthenium coordination compound synthesis, in particular to a preparation method of tris (4, 4 '-dimethyl-2, 2'-dipyridyl) ruthenium hexafluorophosphate (II). According to the preparation method provided by the invention, a trivalent ruthenium source, 4, 4 '-dimethyl-2, 2'-dipyridyl and water-soluble hexafluorophosphate are taken as raw materials, water is taken as a solvent, monobasic acid and / or monobasic aldehyde with the carbon atom number of 1-2 are / is taken as a reducing agent, and tris (4, 4 '-dimethyl-2, 2'-dipyridyl) ruthenium hexafluorophosphate (II) is prepared with high yield through a one-pot method. According to the method, ruthenium (III) in a trivalent ruthenium source is reduced into ruthenium (II) by a reducing agent, meanwhile, the reduced ruthenium compound (II) is coordinated with 4, 4 '-dimethyl-2, 2'-dipyridyl to form tri (4, 4 '-dimethyl-2, 2'-dipyridyl) ruthenium (II) ions, and finally, the tri (4, 4 '-dimethyl-2, 2'-dipyridyl) ruthenium (II) ions react with water-soluble hexafluorophosphate to obtain a target product.

The application discloses an oil film removing agent and a preparation method and application thereof. The oil film removing agent comprises the following components: an organic polyacid salt, an organic monobasic acid, a carboxyl type imidazoline surfactant and an amine oxide surfactant. The oil film removing agent can not only quickly remove the oil film, but also has a simple application method, and can meet the market demand better. The oil film removing agent can be applied to aquaculture water bodies, and can quickly remove the oil film of the aquaculture water bodies and reduce the eutrophication degree of the water bodies. The oil film removing agent can be directly added to the polluted water bodies to remove the oil film, and other complicated devices and processes are not needed, and the oil film removing agent can be directly used in large-scale aquaculture farms, is easy to popularize and apply, and has a good development prospect.

The application discloses a titanium-based catalyst and a preparation method and application thereof. The titanium-based catalyst comprises a reaction product and / or mixture of the following components: (1) a titanium-containing compound, (2) a monobasic acid, (3) a hydroxyl carboxylic acid, (4) an optional solvent. The method comprises mixing raw materials including the titanium-containing compound, the monobasic acid, the hydroxyl carboxylic acid and the optional solvent, and performing reaction to obtain the titanium-based catalyst. The catalyst has excellent hydrolysis resistance and high catalytic activity, and the polyester obtained by using the catalyst has high intrinsic viscosity and excellent color phase.