134 results about "Isothiazolinone" patented technology

The present disclosure is directed to a preservative composition comprising a linear polyetheramine having a molecular weight greater than 118 Daltons (Da) and at least one isothiazolinone, whereby this preservative composition may further comprise a pyrithione salt and / or a metal salt. Also disclosed is an aqueous industrial material comprising the preservative composition as well as a method for enhancing in-contaniner preservative performance of an aqueous industrial material using the preservative composition.

The invention discloses an isothiazolinone non-curing coating and a preparation method thereof, and relates to the technical field of waterproof coatings. The coating comprises a base material, a compound isothiazolinone antibacterial agent, a mixed stabilizer, a compound plasticizer, a compound anti-aging agent, a filler, an adhesion promoter and a solvent, the compound type isothiazolinone antibacterial agent is prepared by mixing and compounding 2-methyl-4-isothiazolin-3-ketone and 5-chloro-2-methyl-4-isothiazolin-3-ketone according to a mass ratio of (1 to 3): 1, and the compound type isothiazolinone antibacterial agent is prepared by mixing and compounding 2-methyl-4-isothiazolin-3-ketone and 5-chloro-2-methyl-4-isothiazolin-3-ketone and 5-chloro-2-methyl-4-isothiazolin-3-ketone; the mixed stabilizer is formed by mixing organic bentonite, polyamide wax and fumed silica; the defects that an existing non-curing coating is poor in antibacterial performance, insufficient in aging resistance and poor in formula compatibility are overcome.

The invention relates to the technical field of paint preparation, in particular to a preparation method for removing harmful gases from paint, which comprises the following steps: preparing functional components for removing harmful gases, and weighing nano titanium dioxide, activated carbon and modified montmorillonite according to the mass ratio of (5-10): (2-5): (1-3); the preparation method comprises the following steps: preparing a resin base material: weighing 30-50 parts by mass of hydroxy acrylic resin, 10-20 parts by mass of polyurethane resin, 20-30 parts by mass of deionized water and 5-10 parts by mass of ethanol; preparing a coating premix: adding 1-3 parts by mass of a polycarboxylate dispersant and 0.5-2 parts by mass of an organic silicon defoaming agent into the resin base material; and preparing a finished product coating: adding 0.5-2 parts by mass of an acrylate leveling agent, 1-4 parts by mass of a hydroxyethyl cellulose thickening agent and 0.5-1.5 parts by mass of an isothiazolinone mildew preventive into the coating premix. The coating disclosed by the invention has the following beneficial effects that the coating can cope with a complex scene in which indoor multi-component pollutants coexist; the problem of harmful gas desorption after adsorption saturation of a single material is avoided, and the purification validity period is prolonged.

The invention discloses an aqueous film-forming foam extinguishing agent based on a short fluorocarbon chain, and relates to the technical field of extinguishing agents. The invention discloses an aqueous film-forming foam extinguishing agent based on a short fluorocarbon chain. The cleaning agent is prepared from the following raw materials in parts by weight: 8 to 12 parts of modified short fluorocarbon chain surfactant, 5 to 8 parts of dodecyl dimethyl betaine, 50 to 60 parts of deionized water, 2 to 4 parts of modified guar gum, 4 to 6 parts of ethylene glycol, 1 to 2 parts of benzotriazole, 0.5 to 1 part of sodium bicarbonate, 0.3 to 0.5 part of polydimethylsiloxane, 3 to 5 parts of decabromodiphenyl ethane and 1 to 2 parts of sodium carboxymethyl cellulose. 0.5 to 1 part of disodium ethylene diamine tetraacetate, 0.2 to 0.4 part of isothiazolinone and 0.5 to 1 part of nano silicon dioxide. According to the aqueous film-forming foam extinguishing agent based on the short fluorocarbon chain, the modified short fluorocarbon chain surfactant and the nano silicon dioxide cooperate, so that a film is formed quickly and compactly, and the extinguishing efficiency is high; the modified guar gum improves the foam stability, and the foam holding time is long; the raw material ratio is scientific, and both equipment protection and fire control are considered; the preparation process is rigorous, the product quality is stable, and various fire extinguishing scenes are adapted.

The invention discloses a solubility-resistant fluoride-free aqueous film-forming foam extinguishing agent and a preparation method thereof, and relates to the technical field of extinguishing agents. The invention discloses a soluble-resistant fluoride-free aqueous film-forming foam extinguishing agent. The cleaning agent is prepared from the following raw materials in parts by weight: 8 to 12 parts of a compound surfactant, 15 to 20 parts of modified polyvinyl acetate, 3 to 5 parts of modified xanthan gum, 5 to 8 parts of ethylene glycol butyl ether, 4 to 6 parts of propylene glycol, 0.5 to 1 part of benzotriazole, 0.3 to 0.6 part of triethanolamine, 0.2 to 0.4 part of disodium ethylene diamine tetraacetate, 0.8 to 1.2 parts of hydroxyethyl cellulose, 0.1 to 0.3 part of polyether modified silicone oil and 0.05 to 0.1 part of isothiazolinone. 6-9 parts of ammonium dihydrogen phosphate and the balance of deionized water. According to the anti-dissolution fluoride-free aqueous film-forming foam extinguishing agent, fluoride-free components are more environmentally friendly, and the requirement for green development is met; the compound surfactant has a synergistic effect with the modified polyvinyl acetate and the modified xanthan gum, so that the fire extinguishing efficiency and the solubility resistance are improved; the process is clear, parameters are clear, the product stability is good through ultrasonic dispersion and high-pressure homogenization treatment, the performance is optimized through multiple additives, and the application scene is wide.

The application belongs to the technical field of organic synthesis, and particularly relates to a preparation method of 5-chloro-2-methyl-4-isothiazoline-3-ketone. N,N'-dimethyl-3,3'-dithiodipropionamide is mixed with ethyl acetate, cooled to 8-10 DEG C, and chlorine is added in stages, and the reaction is continued after the chlorine is passed; the adding mode of the chlorine is as follows: in the first stage, 25-30% of the chlorine is passed in 0.5h while maintaining the temperature of the reaction system at 10-12 DEG C; in the second stage, 25-30% of the chlorine is passed in 1h while maintaining the temperature of the reaction system at 13-14 DEG C; and in the third stage, the remaining chlorine is passed in 1.5h while maintaining the temperature of the reaction system at 15-18 DEG C. The application controls the generation of 5-chloro-2-methyl-4-isothiazoline-3-ketone by controlling the adding amount of the chlorine and the reaction temperature, and improves the yield of 5-chloro-2-methyl-4-isothiazoline-3-ketone.

The invention relates to the technical field of oxygen free radical detection, in particular to a manufacturing process of a portable and reliable oxygen free radical detector. Comprising the following steps: mixing superoxide dismutase, potassium ferricyanide, an isothiazolinone preservative, hexammine ruthenium chloride, polyethylene glycol octylphenol ether, trehalose and bovine serum albumin, and uniformly stirring to prepare an enzyme preparation; mixing an enzyme preparation with the high polymer material solution to form reagent layer slurry with viscosity; uniformly coating the reagent layer slurry on a substrate material, and drying; printing an electrode material on the substrate material to form a working electrode and a counter electrode; the silver electrode is placed in an electrolyte containing chloride ions, potential is applied, the silver surface is subjected to a chlorination reaction, and a silver / silver chloride electrode is formed; covering the reagent layer above the electrode, tightly combining the reagent layer with the electrode in a sticking or hot pressing manner, and cutting to obtain the test paper; the prepared portable oxygen free radical detector can be used for conveniently and efficiently detecting oxygen free radicals of a human body at low cost.

The invention relates to an isopentenol polyoxyethylene ether defoaming agent and a preparation method thereof, the defoaming agent is mainly prepared from a cross-linked acrylic copolymer emulsion, an alkali swelling thickener, a modified organic silicon defoaming active matter, a pH regulator (NaOH / KOH), an isothiazolinone bactericide, deionized water and the like in proportion, and the defoaming agent has excellent defoaming performance and stability. A specific auxiliary agent is added. The foam problem of an isopentenol polyoxyethylene ether product in downstream application is solved, and the defoaming agent is mainly applied to defoaming of isopentenol polyoxyethylene ether.

The application discloses a high-protection water-based outdoor wood one-coat paint and a preparation method thereof, and belongs to the field of paints. The method comprises the following steps: adding water-based acrylic resin and high-flexibility fluorine-containing acrylic emulsion into a paint mixing kettle and uniformly stirring; then adding dipropylene glycol methyl ether, dipropylene glycol butyl ether, a base material wetting agent, a defoaming agent, a scratch-resistant additive, and water into a batching kettle to obtain a dispersed mixed solution; mixing the dispersed mixed solution, modified nano cerium oxide-silicon nitride compound slurry and water-based titanium white paste again, adding micro-fine silica aerogel powder after mixing, adding isothiazolinone bactericide and tannin acid inhibitor after fine dispersion, mixing again, filtering the product after adjusting the system viscosity by adding an associated polyurethane thickening agent, and obtaining the high-protection water-based outdoor wood one-coat paint.

The present invention relates to the field of product quality analysis, and specifically, a test kit and detection method for testing isothiazolinone in textiles. A pretreatment step of the present invention adopts a unique process, which may fully transfer isothiazolinone to an acetone and water mixed solution, so that a more accurate measurement result can be achieved. The testing method of the present invention dose not add indicators, does not use large-scale analysis instruments, and is accurate in measurement, easy in reaction termination determination, high in accuracy, low in cost, and strong in popularization and application.

This invention provides an antibacterial and antifungal TPE material, belonging to the field of thermoplastic elastomer technology. The antibacterial and antifungal TPE material of this invention comprises the following components: SEBS, PP, a plasticizer, modified nano-zinc oxide, N-n-butyl-1,2-benzisothiazolin-3-one, 4,5-dichloro-2-n-octyl-4-isothiazolin-3-one, an antioxidant, and zinc stearate; wherein the modified nano-zinc oxide is obtained by melt blending nano-zinc oxide with maleic anhydride-grafted SEBS, the mass ratio of the modified nano-zinc oxide to the maleic anhydride-grafted SEBS is (0.6-1.7):1, and the particle size of the nano-zinc oxide is 20-50 nm; the free acid content of the zinc stearate is 0.3%-0.5%. The antibacterial and antifungal TPE material of this invention possesses good antibacterial properties, antifungal properties, and tensile strength.

The invention relates to a green, safe and environment-friendly granulation auxiliary agent for granular urea and a preparation method and application thereof.The granulation auxiliary agent is prepared from 10%-20% of crystalline fructose, 5%-15% of carboxymethyl cellulose, 5%-15% of polyaspartic acid, 0.1%-0.5% of isothiazolinone and 50%-79.9% of purified water. Adding carboxymethyl cellulose in a spreading manner at normal temperature, standing on the water surface, and starting to stir uniformly after absorbing water and swelling for 24 hours, so as to obtain a carboxymethyl cellulose aqueous solution; stirring and completely dissolving the residual purified water, crystalline fructose and polyaspartic acid in another reaction kettle, adding the solution into the carboxymethyl cellulose aqueous solution within 1.5-2.5 hours, and continuously stirring; and finally, adding isothiazolinone, and uniformly stirring to obtain the granulation auxiliary agent. When the granulation aid is used, 0.5-2.0 kg of the granulation aid is pumped into a urea production system by a pressure pump per ton of urea to ensure that the granulation aid is effectively, sufficiently and uniformly mixed with urea melt to play a role in granulation, so that the traditional urea granulation aid formaldehyde is replaced.

The application belongs to the field of detection reagents, and particularly relates to a single-component luminol chemiluminescence substrate liquid and a preparation method thereof. The single-component luminol chemiluminescence substrate liquid comprises the following components: sodium acetate, sodium perborate, N-N dimethylacetamide, beta-cyclodextrin, luminol, 4-morpholinopyridine, p-acetylaminophenol, 4-hydroxyphenylacetic acid, phenothiazine-10-yl-propyl sulfonic acid sodium salt and isothiazolinone. The purpose of the application is to solve the technical defects that the luminol chemiluminescence substrate liquid in the prior art must be packaged in two components due to the instability of the luminous agent and the oxidizing agent in the liquid phase, leading to inconvenient use and easy introduction of operation errors, so as to provide a single-component luminol chemiluminescence substrate liquid and a preparation method thereof, which have high storage stability, high luminous performance and convenient use.

The invention relates to an efficient multifunctional cleaning agent for a medical endoscope and a preparation method of the efficient multifunctional cleaning agent, and belongs to the technical field of medical cleaning. The cleaning agent is prepared from isopropyl alcohol, glycerol, propylene glycol, TritonX-100, fatty alcohol-polyoxyethylene ether, mannitol, 4-FPBA, hydroxytyrosol, sodium formate, benzisothiazolinone, a multienzyme compound and deionized water according to a specific ratio. The preparation method comprises the steps of step-by-step dissolution, temperature-controlled mixing and low-temperature enzyme adding. The cleaning agent can effectively remove stubborn stains such as protein and fat on the surface of an endoscope (the removal rate is larger than or equal to 90%), the bacteriostasis rate on escherichia coli and staphylococcus aureus is larger than or equal to 99%, and corrosion to stainless steel, rubber and plastic materials is avoided. Experiments show that the enzyme activity retention rate of the multienzyme compound still reaches 80% or above after the multienzyme compound is stored for 2 years, and the technical problems that an existing cleaning agent is not thorough in decontamination, poor in antibacterial activity and capable of corroding equipment are solved.

The invention relates to the technical field of oil exploitation aids, and particularly discloses a nano thick oil viscosity-reducing blocking remover and a preparation method thereof. The invention relates to a nano thick oil viscosity-reducing blocking remover, which is prepared from the following raw materials in parts by weight: 10 to 18 parts of mineralized modified nano silicon carrier, 10 to 14 parts of cross-linked fluorocarbon surfactant, 0.1 to 0.3 part of polyacrylamide, 1 to 3 parts of styrene-acrylic isothiazolinone and 55 to 75 parts of deionized water, the mineralized modified nano silicon carrier is prepared by taking nano silicon dioxide as a core and growing a hydroxyapatite-titanium dioxide composite shell layer on the surface of the core through a mineralization process. The long-term stability of the viscosity reduction effect of the viscosity reduction blocking remover in the high-temperature and high-salt environment is effectively enhanced, and the long-term service stability of the viscosity reduction blocking remover in the deep reservoir environment is comprehensively improved.

The present invention relates to a bio-based microbial retardant composition and a method of preparation thereof The composition comprises lactic acid (2-20% v / v), glutaraldehyde (0.5-10% v / v), Polysorbate 80 (Tween 80) (1-15% v / v), Melia Azadirachta Seed Oil (Neem oil) (0.05-5.5% v / v), and Methylchloroisothiazolinone (Preservative DB20) (0.01-1% v / v). This composition is designed to maintain an acidic pH of 1.5 to 3.5, ensuring immediate microbial retardation. The lactic acid stabilizes the glutaraldehyde, preventing polymerization, while Polysorbate 80 emulsifies Neem oil to enhance antimicrobial action. The preservative inhibits initial microbial contamination, providing immediate suppression of microbial load. The composition is readily biodegradable, exhibiting over 70% degradation within 28 days and is capable of broad-spectrum antimicrobial activity, effective against gram-negative bacteria, fungi, and algae. The composition shows sustained antimicrobial efficacy across multiple generations without inducing resistance. A method of preparing the composition is also provided, involving a sequence of mixing steps for optimal performance.

The invention relates to a composite electrostatic eliminator and a preparation method thereof, and relates to the technical field of chemical assistants, the composite electrostatic eliminator comprises isopropanol, cetrimonium chloride, fatty alcohol-polyoxyethylene ether, polyvinyl alcohol, polyethylene glycol, triethanolamine, isothiazolinone, propylene glycol, disodium ethylene diamine tetraacetate, essence, modified carbon nanotubes, and a hydrophobic ionic liquid. The water-based polyurethane resin is prepared from water-based furan polyurethane, non-ionic water-based furan polyurethane, bismaleimide and the balance deionized water. Modified carbon nanotubes and hydrophobic ionic liquid are uniformly dispersed in a coating through electrostatic anchoring of cetrimonium chloride and emulsification of fatty alcohol-polyoxyethylene ether, an electron tunneling network in a low-humidity environment is formed, and it is ensured that the electrostatic dissipation capacity of the coating of the electrostatic elimination agent in the low-humidity environment is improved; a dynamic cross-linked network is formed through a Diels-Alder reaction generated by the nonionic waterborne furan polyurethane and the bismaleimide, a conductive path in a damaged area can be rebuilt under external thermal excitation, and the functional durability is improved.

This utility model discloses a waste treatment device for isothiazolinone production, relating to the field of isothiazolinone production technology. The waste tank is connected to a first filter, the first filter is connected to a settling tank, the settling tank is connected to a distillation tank, the distillation tank is connected to a degradation tank, the degradation tank is connected to a sedimentation tank, the sedimentation tank is connected to a second filter, the second filter is connected to a nanofiltration membrane device, and the nanofiltration membrane device is connected to a treatment water tank. This device can effectively remove harmful substances from the isothiazolinone production waste, achieving harmless treatment of the waste and also realizing resource recycling to a certain extent, thus possessing good environmental and economic benefits.

This invention provides a pH-responsive, high-temperature resistant hybrid intelligent drug-release microcapsule, its preparation method, and its application in electrical insulation materials, relating to the field of electrical insulation materials. The preparation method of the microcapsules of this invention includes the following steps: weighing chitosan and adding it to an aqueous acetic acid solution, stirring to obtain an acidic chitosan solution; adding an isothiazolinone antibacterial agent solution dropwise to the acidic chitosan solution, performing high-speed shearing and ultrasonic dispersion to obtain a nano / submicron emulsion; adding tetraethyl orthosilicate dropwise to the emulsion, stirring, adjusting the pH value to form a hybrid gel shell; dispersing the hybrid gel shell in anhydrous ethanol; adding a silane coupling agent; adding a zinc salt solution, stirring to obtain a microcapsule slurry; adding the microcapsule slurry to a growth solution, and reacting to obtain the target microcapsules. The microcapsules of this invention have a core-shell-skin three-layer structure and, when used in outdoor electrical insulation materials, can achieve intelligent response and long-term inhibition of algae, mold, and microbial attachment and growth.

The invention discloses a refractory mortar sheet-shaped prefabricated body as well as a preparation method and a construction method thereof, and belongs to the technical field of refractory mortar. The refractory mortar flaky preform is prepared from the following raw materials: 70 to 80 percent of porous bauxite clinker, 5 to 10 percent of quartz powder, 5 to 10 percent of silica powder, 0.5 to 1.0 percent of isothiazolinone derivative, 3 to 6 percent of passivated aluminum powder, 0.1 to 0.3 percent of tricalcium aluminate and 3 to 5 percent of yellow dextrin. 10-15% of a polyvinyl alcohol solution is added; the mass ratio of polyvinyl alcohol to water in the polyvinyl alcohol solution is 1: (18-20); the preparation method comprises the following steps: uniformly mixing the raw materials, pressing into slices and curing. The refractory mortar sheet-shaped prefabricated body has a rich microporous structure, has heat insulation property and moisture permeability, also has good forming strength and good plasticity and high-temperature performance after wetting, realizes a construction mode of on-site unpacking and ready-to-use, greatly improves the construction efficiency, and is suitable for high-efficiency masonry of industrial kiln masonry.

This utility model discloses a pretreatment device for raw materials in the production of high-purity Kathon, relating to the field of Kathon production technology. The inlet of an ultrasonic reactor is connected via pipelines to a methylchloroisothiazolinone raw material tank and a deionized water tank. The outlet of the ultrasonic reactor is connected via a screw pump to a ceramic membrane device. The liquid phase outlet of the ceramic membrane device is connected via pipelines to a distillation column. The top gas phase outlet of the distillation column is connected via pipelines to a light component tank, an organic solvent tank, and a purified methylchloroisothiazolinone tank. This device achieves effective separation and purification of different components, improving product purity, while simultaneously recovering organic solvents and reducing production costs.

The invention discloses a rubber composite material with marine antifouling property as well as a preparation method and application thereof, and relates to the technical field of marine fouling organism decay protection materials. The rubber composite material with the marine antifouling property comprises the following components which are blended and vulcanized: rubber, a filler, an antifouling agent, a plasticizer, an activating agent, a scorch retarder, an anti-aging agent, an accelerant and a vulcanizing agent, the antifouling agent comprises a copolymer modified by zwitter-ions and at least one of sodium benzoate, tannic acid, 6-gingerol, capsaicin, sulfobetaine, carboxylic acid betaine, phosphorylcholine, isothiazolinone and zinc pyrithione optionally selected from the group consisting of sodium benzoate, tannic acid, 6-gingerol, capsaicin, sulfobetaine, carboxylic acid betaine, phosphorylcholine, isothiazolinone and zinc pyrithione. The invention solves the three core problems of poor compatibility of an antifouling agent and a rubber matrix, short antifouling period caused by easy loss of the antifouling agent, and difficulty in balancing the antifouling property and mechanical property in the existing marine antifouling rubber material.

The invention provides a preparation method of a water treatment agent, which comprises the following steps: providing polysuccinimide, amino acid and inorganic base, mixing according to a ratio, adding a solvent, and reacting to obtain a mixture A; and then adjusting the pH value of the mixture A to weak acidity, adding isothiazolinone, and uniformly mixing to obtain the water treatment agent. The invention further provides the water treatment agent prepared by the method, and the agent has scale inhibition and sterilization performance at the same time.

The utility model belongs to the technical field of chemical production, and discloses a benzisothiazolinone zinc acrylate resin production device which comprises an intermediate reaction kettle, a distillation device, a drying device, a total reaction kettle and a filtering device which are sequentially communicated through a pipeline, a valve and a pump, each of the intermediate reaction kettle and the total reaction kettle is provided with a temperature control device, a stirring device, a temperature sensor and a nitrogen protection device, and the total reaction kettle is also provided with a pH sensor and a dropwise adding device. The device is reasonable in design, simple in structure, convenient to operate and easy for industrial production.

The invention discloses a preparation method of a water treatment agent and the water treatment agent. The preparation method adopts a one-step method for synthesis, and comprises the following steps: mixing polysuccinimide, benzisothiazolinone and alkali, and then adding a solvent for reaction to obtain the water treatment agent. The water treatment agent prepared by the preparation method disclosed by the invention has the effects of scale inhibition and sterilization at the same time, and the efficiency of the water treatment process is improved.

Washing machine comprising a detergent reservoir, said reservoir comprising from 80 ml to 3000 ml liquid detergent comprising an isothiazolinone preservative.

The invention belongs to the technical field of ceramic pigments, and particularly relates to a hand-painted ceramic pigment and a preparation method thereof. The hand-painted ceramic pigment is prepared from the following components in parts by mass: 10 to 20 parts of modified polyvinyl acetate emulsion, 25 to 35 parts of nano silicon PU modified acrylic resin emulsion, 18 to 28 parts of polyurethane waterborne polyurethane resin PUD emulsion, 10 to 20 parts of hand-painted ceramic pigment base material, 1.5 to 3 parts of freeze-thaw resistant agent, 0.1 to 0.2 part of preservative, 0.05 to 0.1 part of mildew preventive, 1 to 2 parts of pH regulator, 5 to 15 parts of color paste, 0.2 to 0.5 part of defoaming agent and 0.2 to 0.5 part of lotus leaf water repellent agent. 0.2 to 0.5 part of an adhesion promoter; 3 to 5 parts of a thickening agent; wherein the anti-freezing and anti-thawing agent is a mixture of a glycol anti-freezing and anti-thawing agent and an ether anti-freezing and anti-thawing agent; the preservative is a mixture of an isothiazolinone preservative and a benzimidazole preservative.

The invention discloses a mildew-proof antibacterial water-based environment-friendly functional coating, and relates to the field of functional coatings. According to the mildewproof and antibacterial water-based environment-friendly functional coating, a base material, a filler, an antibacterial component, a mildewproof synergist and a carrier are prepared according to corresponding proportion and mass to form the functional coating, and the coating takes nano zinc oxide / chitosan composite particles as an antibacterial and antibacterial core functional component; isothiazolinone is used as a spore germination inhibitor; the soapstone and the bentonite are used as functional fillers to improve the air permeability of the coating and the compatibility of the coating with a substrate; and modified polyurethane-acrylic resin is used as an adhesion film-forming material. The coating is applied to the surface of a substrate through spraying or brushing and other processes, the mildew-proof and antibacterial functions are achieved, the protection effect on the substrate is achieved, compared with a common nano-silver bacteriostatic agent, the adhesive force is higher, the antibacterial effect is better, and the coating can be attached to the surface of the sandstone mural for a long time to achieve the mildew-proof and antibacterial effects.

This invention relates to an isothiazolinone solid bactericide and its preparation method. The bactericide comprises solid isothiazolinone hydrochloride particles, a water-soluble film-forming material coating layer on the particle surface, and a solid alkaline pH adjuster physically mixed with the coated particles. The molar ratio of the solid alkaline pH adjuster to the hydrochloride is 0.7–1.2:1, based on the amount of hydroxide provided. The process involves wetting and granulating the solid hydrochloride with a binder solution, drying and sieving to form particles, then coating them with a water-soluble film-forming material solution to obtain coated particles, and finally mixing them uniformly with the solid alkaline pH adjuster. This invention effectively isolates oxygen, moisture, and light through coating technology, significantly improving the product's storage stability, and utilizes the alkaline pH adjuster to ensure that the product is completely converted into a free state with bactericidal activity before use.

The invention discloses a low-VOC (volatile organic compound) environment-friendly building coating and a preparation method thereof in the technical field of coatings, and the method comprises the following steps: firstly stirring and dissolving deionized water, hydroxyethyl cellulose and an ammonium polyacrylate dispersing agent, and then adding rutile titanium dioxide, diatomite and heavy calcium carbonate for dispersing; adding soap-free organic silicon acrylic emulsion, mixing, sequentially adding a VOC adsorbent based on a morpholine modified polymer, a nano photocatalytic composite material with a yolk-shell structure, a mineral oil-based defoaming agent, a benzisothiazolinone preservative and a zinc ion antibacterial agent, and stirring; and finally, adding the associated polyurethane thickener, adjusting the pH value, and filtering. The prepared coating is high in environmental protection property, can effectively adsorb and degrade volatile organic compounds, and has antibacterial and mildew-proof functions.