53 results about "Monobasic acid" patented technology

The present invention relates to a photosensitive resin composition, a solder resist ink, a dry film and a cured product, the photosensitive resin composition contains an epoxy acrylic resin having a specific structure, and the epoxy acrylic resin having the specific structure is formed by adding an alpha, beta, beta, beta, beta, beta, beta, beta, beta, beta, beta, beta, beta, beta, beta, beta, beta, beta, beta, beta, beta, beta, beta, beta, beta, beta, beta, beta, beta, beta, beta, beta, beta, beta, beta, beta, and then adding dibasic acid anhydride to the beta-unsaturated monobasic acid a1 and the monobasic acid a2 with a specific structure. According to the invention, a certain proportion of monobasic acid a2 with a special structure is introduced into epoxy acrylate, so that the dispersibility of the photosensitive resin composition to pigments and fillers can be effectively improved; and the water absorption of the cured product is reduced, so that the lead-free tin spraying resistance and the wave soldering resistance are improved.

The invention relates to a petrochemical technology, in particular to a modified nano calcium carbonate material, a preparation method and application thereof and fracturing fluid. The molecular aggregate fluid dynamic diameter D10 of the modified nano calcium carbonate material in water is 2-10 [mu] m, the molecular aggregate fluid dynamic diameter D50 is 8-31 [mu] m, and the molecular aggregate fluid dynamic diameter D90 is 20-90 [mu] m. The preparation method of the modified nano calcium carbonate material comprises the following steps: carrying out hydroxylation treatment on unsaturated fat monobasic acid, and carrying out contact reaction on the hydroxylated unsaturated fat monobasic acid and a nano calcium carbonate raw material; and carrying out amination treatment on the product of the contact reaction. The modified nano calcium carbonate material not only has degradation performance meeting fracturing construction requirements, but also can realize multi-size plugging in tight reservoirs and improve the plugging rate of pore throats, and can enter the pore throats to adsorb and occupy space so as to reduce retention volume of fracturing fluid and reduce damage to the reservoirs.

The present invention provides a non-invasive, portable, multimodal wearable sweat sensor device, belonging to the technical field of wearable biosensor devices. ZrCl4, a monobasic acid modifier, and terephthalic acid are dissolved in an organic solvent, followed by a hydrothermal reaction. After the hydrothermal reaction, the white precipitate is collected and treated in a mixed solution of hydrochloric acid and DMF, centrifuged, washed, and dried to obtain a metal organic framework (MOF) carrier. The MOF carrier, GOx, and HRP are added to a buffer solution, stirred, centrifuged, and washed to obtain an enzyme-encapsulated metal organic framework (MOF) material. The enzyme-encapsulated MOF material is fabricated into a detection point, which, together with a skin adhesion layer, a paper-based microfluidic layer, and an encapsulation layer, forms a non-invasive, portable, multimodal wearable sweat sensor device. The sensor device can be directly integrated with the skin surface to continuously and in real time quantify sweat loss and provide quantitative data on glucose in sweat.

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.

The invention discloses a preparation method of a copper-based metal organic framework (MOF) material capable of realizing SO2 capture through adjustment of different unit acids, monobasic acids (nitric acid (HNO3), formic acid (FA) and benzoic acid (BA)) are adopted as regulators, and anisotropic growth is realized through systematic regulation of crystal growth kinetics, so that MOF materials with different morphological characteristics are successfully prepared. Experimental results show that the gas adsorption performance of the material can be remarkably improved through the morphology control strategy. The research not only provides a new design thought for developing a material for selectively adsorbing characteristic components (such as SO2) of SF6 decomposed gas, but also realizes optimization of material performance through accurate regulation and control of MOF morphology, and has a great significance in guaranteeing safe operation of power equipment, preventing aging of an insulating material, prolonging the service life of the equipment, protecting the environment and assisting the realization of a dual-carbon target. The method has important scientific significance and engineering application value.

To provide a polyester resin for toner with which an image excellent in glossiness is obtained without impairing low temperature fixability, electrification performance, and high-temperature resistance.SOLUTION: A polyester resin for toner includes a monobasic acid (a1), a polybasic acid (a2), a polyalcohol (a3), a monoepoxy compound (a4), and a polyepoxy compound (a5) having four or more epoxy groups, as reactive components. The polybasic acid (a2) is formed of an aromatic dicarboxylic acid and an aliphatic dicarboxylic acid, and includes the aliphatic dicarboxylic acid in an amount of 1-15 pts.mass relative to 100 pts.mass of the aromatic dicarboxylic acid. The ratio of the polyepoxy compound (a5) having four or more epoxy groups in the reactive components is within a range of 1.0-5.0 mass% of the total of the (a1)-(a5).SELECTED DRAWING: None

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.

Provided is a method of producing an anhydride of an organic mono-acid comprising contacting an organic mono-acid and a thermally regenerable anhydride to produce the anhydride of the organic mono-acid, and either a diacid of the regenerable anhydride, a partially hydrolyzed regenerable anhydride, or both. In a particular example, acetic acid and glutaric anhydride can be reacted to form acetic anhydride.

The application belongs to the technical field of paint, and particularly relates to a high-flowing and storage-resistant polyester resin as well as a preparation method and application thereof. The preparation raw materials of the high-flowing and storage-resistant polyester resin include a first polyol, a second polyol, a monohydric alcohol, a polybasic acid, a monobasic acid and an acidolysis agent. Through the interaction of the components, especially the fact that the fluorene-containing polyol, the monohydric alcohol and the monobasic acid are all rigid high steric hindrance monomers, the positive correlation restriction between the glass transition temperature and the melt viscosity of the traditional amorphous polyester resin is well overcome to a certain extent, a good balance between the two is achieved, the polyester resin has a relatively high glass transition temperature and a relatively low melt viscosity, the prepared paint can simultaneously consider the storage stability and the flowability, and has good storage stability and flowability.

1. An anhydrous composition for making up keratinous materials, comprising: 1) a polyester-containing mixture containing: a) at least one polyester which is a reaction product of the following components: i) at least one polyglycerol-3, and ii) at least one dimer acid, and iii) at least one C8-C30 aliphatic monoacid, wherein the reacted components i) to 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 acid; and b) at least one non-volatile non-silicone oil H1; 2) at least one wax; 3) at least one colorant selected from titanium dioxide, iron oxide, organic pigments, and colorants soluble in the medium of the composition; and, optionally, 4) at least one non-volatile non-silicone oil H2, which is the same as or different from oil H1.

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 invention relates to an anhydrous composition for making up keratin materials, comprising 1) a polyester-containing mixture comprising a) at least one polyester which is the reaction product of: i) at least one polyglycerol-3; and ii) at least one dimer acid; and iii) at least one C8-C30 fatty monoacid wherein the molar ratios of the reacted components i) to iii) are 1 mole of polyglycerol-3, 0.5 to 1 mole of dimer acid and 0.1 to less than 2.0 moles of fatty acid; and b) at least one non-volatile non-silicone oil H1; 2) at least one wax; 3) at least one colorant selected from the group consisting of titanium dioxide, iron oxides, organic pigments and colorants soluble in the composition medium; and optionally 4) at least one non-volatile non-silicone oil H2, which is the same as or different from oil H1.

There is provided a first method of producing an anhydride of an organic monoacid, the first method comprising performing a transanhydridation reaction of an organic monoacid and a thermally renewable anhydride to produce an anhydride of the organic monoacid and an acid of the thermally renewable anhydride, wherein at least one of the organic monoacid and the thermally renewable anhydride is provided by a pretreatment integrated with the first process. The present application also provides an anhydride generation system integrated with at least one pretreatment, a wood acetylation process coupled with an acetic anhydride production process, a method of supplying an acetic acid reactant feed to a transanhydridation reaction unit, and an integrated wood acetylation and anhydride generation system.

The present invention belongs to the technical field of polymer materials, and particularly relates to an alkali-soluble epoxy acrylate resin modified by an unsaturated dibasic acid, and a preparation method and application thereof. Calculated by mass parts, its raw material composition includes: 40-80 parts of unsaturated dibasic acid, 4-8 parts of catalyst, 1-4 parts of first inhibitor, 150-300 parts of first epoxy resin, 100-200 parts of second epoxy resin, 50-200 parts of monoisocyanate, 50-100 parts of unsaturated monobasic acid, 0.5-2 parts of second inhibitor, 100-300 parts of organic anhydride, and 300-500 parts of solvent. In the resin molecule of the present invention, there are multiple photocurable unsaturated groups at different sites and branched chains composed of epoxy resin, which have the advantages of high photosensitive curing activity, strong adhesion, fine development characteristics and low thermal expansion coefficient. Therefore, the photosensitive solder resist ink containing this resin has excellent properties such as photosensitivity, etching resistance, electroplating resistance, and film stripping property, and is suitable for application in the preparation of IC substrates and printed circuit boards.

The application provides a preparation method of an amide-modified unsaturated polyester resin, comprising the following steps: reacting at least one of a binary acyl chloride and a binary acid with a monovalent amine containing a hydroxyl group, and / or reacting a binary amine with a monovalent acid containing a hydroxyl group to obtain an amide alcohol; and reacting at least one of an unsaturated binary acid and an unsaturated binary anhydride, at least one of a saturated binary acid and a saturated binary anhydride, a binary alcohol, an end-capping agent and the amide alcohol to obtain the amide-modified unsaturated polyester resin. The amide-modified unsaturated polyester resin can improve the bonding strength, tensile strength, bending strength and wear resistance of an insulating paint, and is beneficial to the use of the insulating paint. The application further provides the insulating paint and an application thereof.

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.

The invention provides a fatty acid ester composition, a refrigerating machine oil composition based on the fatty acid ester composition and application of the refrigerating machine oil composition. The refrigerating machine oil composition comprises the following components: base oil which is mainly composed of polybasic mixed alcohol ester, and in the polybasic mixed alcohol ester, the proportion (by weight) of a short-chain fat monobasic acid ester structure is 5-20%; the additive comprises an antioxidant, a free acid capturing agent and at least one of the following substances: a metal deactivator, an anti-foaming agent, an extreme pressure anti-wear agent and a friction modifier; wherein the mass percentage content of the additive is 0.1 to 5 weight percent. The refrigerator oil composition provided by the invention is suitable for an HFO mixed refrigerant, and has excellent intermiscibility, chemical stability and oxidation resistance.

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 invention discloses a preparation method of a low-dielectric polyimide, a low-dielectric polyimide film and a flexible flexible board thereof, which relates to the technical field of organic polymer materials, and its technical key points are as follows: including the following steps: Step S1, synthesize a phenolic hydroxyl group-containing monobasic anhydride monomer with a clear sequence structure; Step S2, synthesize a halogenated monoamine with a clear sequence structure; Step S3, prepare a novel PI resin with a clear sequence structure through imidization and aromatic nucleophilic substitution reactions, optimize the synthesis process, and establish a new strategy for PI resin synthesis. The present invention provides a new strategy for preparing a polyimide resin with low dielectric, low loss and low moisture absorption, enabling the PI resin to be prepared into a polyimide film by means of solution casting, casting, blown film, melt extrusion, etc., without high-temperature thermal imidization, with diverse processing methods and energy saving.

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 belongs to the technical field of polymer materials, and provides alkali-soluble resin, a preparation method thereof, a photosensitive resin composition and application thereof. The preparation method of the alkali-soluble resin comprises the following steps: reacting epoxy resin with unsaturated monoacid to obtain a prepolymer; and carrying out a reaction on the prepolymer and acid anhydride to obtain the alkali-soluble resin. Through the design and combined action of the raw materials and the process, the alkali-soluble resin and the photosensitive resin composition containing the alkali-soluble resin have an excellent developing effect, a developed pattern is clear, the pattern resolution is high, the adhesive force with a substrate is good, the hardness is high, and the alkali-soluble resin and the photosensitive resin composition are particularly suitable for scenes needing laminated printing; and the problem of deformation of the multi-layer laminated coating curing pattern is effectively avoided, and the pattern quality is remarkably improved.

The invention belongs to the technical field of coatings, and provides alkyd resin for color paste as well as a preparation method and application of the alkyd resin. According to the alkyd resin for the color paste, provided by the invention, polyamide polyamine, castor oil, polyhydric alcohol, polybasic acid and monobasic acid are adopted as main preparation raw materials, wherein the preparation raw materials of the polyamide polyamine comprise polyethylene polyamine, saturated dibasic acid and unsaturated monobasic acid. The alkyd resin in the color paste is directly improved, the prepared alkyd resin for the color paste is transparent and free of mechanical impurities, the viscosity (25 DEG C) is 35500-45000 cps, the acid value is 7.5-9.8 mgKOH / g, the amine value is 14.8-23.7 mgKOH / g, the alkyd resin for the color paste is further used for preparing the color paste, the color paste has the characteristics of no flocculation, no precipitation, no flooding and floating, capability of improving the gloss after film formation, stable color and uniform hue, no additional dispersing agent is needed, and the alkyd resin for the color paste is suitable for industrial production. The cost is saved.

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.