13 results about "Methyl-isothiazolinone" patented technology

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 sewage treatment, in particular to a preparation method of a degradable bactericide for an oil field. According to the invention, a hydroxypropyl guanidine gum-polycaprolactone-ethylenediamine fragment copolymer is taken as a carrier, a methylisothiazolinone quaternary ammonium salt (Q-MIT) bactericide is loaded, and the degradable bactericide for the oil field is obtained by cooperating with a dodecyl ethyl sulfide (TC-SE) bactericide and combining with sodium polyaspartate. A carrier forms a hydrogen bond with a polar group on the surface of a biological membrane through a hydroxypropyl guanidine gum main chain to realize targeted anchoring, a polycaprolactone branched chain encapsulates Q-MIT through a hydrophobic effect, primary amino groups of ethylenediamine are introduced to form a pH sensitive Schiff base bond with Q-MIT, and the primary amino groups and adipic dihydrazide form a thermal response hydrazide bond to construct a dual dynamic covalent bond, so that controlled release of Q-MIT is realized, and the biomembrane is prepared. And moreover, the components of the whole system are connected through degradable chemical bonds, so that the environmental protection property and sustainability of oil field operation are guaranteed.

Disclosed is a thickener dispersion including a thickener including at least one among carboxymethyl cellulose and metal salt of the carboxymethyl cellulose, a change-over-time inhibitor, and an aqueous solvent. The change-over-time inhibitor includes at least one selected from the group consisting of phenoxyethanol, sodium azide, paraben, formaldehyde, 5-chloro-2-methyl-4-isothiazolin-3-one, sodium benzoate, ethylhexylglycerin, and 1,2-hexanediol. The thickener is included in an amount of 0.05 wt % to 3.5 wt % in the thickener dispersion, and the change-over-time inhibitor is included in an amount of 0.05 wt % to 3.0 wt % in the thickener dispersion.

This utility model relates to the field of 2-methyl-4-isothiazolin-3-one production technology, and particularly to a separation and purification system for 2-methyl-4-isothiazolin-3-one. The system includes a neutralization vessel connected to a feed liquid delivery pipeline and a hydrochloric acid delivery pipeline. The outlet of the neutralization vessel and the extractant delivery pipeline are respectively connected to an extraction tower. The organic phase outlet of the extraction tower is connected to an adsorption device. The outlet of the adsorption device is connected to a distillation kettle. The vent of the distillation kettle is connected to a vacuum condenser. The condensate outlet of the vacuum condenser is connected to a solvent storage tank. The concentrate outlet of the distillation kettle is connected to a crystallization tower. The crystal outlet of the crystallization tower is connected to a centrifuge. The outlet of the centrifuge is connected to a drying device. The outlet of the drying device is connected to a product storage tank. This separation and purification system is rationally designed and can effectively separate impurities from the MIT feed liquid, greatly improving the purity of the MIT product.

The invention provides a method for simultaneously determining the contents of seven common preservatives in a building water-based interface agent by using a liquid chromatograph. According to the method, the separation degree of seven preservatives including methylisothiazolinone, chloromethylisothiazolinone, benzisothiazolinone, octyl isothiazolinone, dichloro octyl isothiazolinone, iodopropargyl butyl carbamate and zinc pyrithione is good, and the linear correlation coefficient of a standard curve for quantification ranges from 0.99952 to 1.0000; the detection limit is 0.2 to 0.45 mg / kg; the precision is 0.8%-1.5%, and the sample adding standard recovery rate is 94.4%-98.4%. And the method has good stability. Experimental conditions for simply and rapidly determining the content of the preservative in the water-based interface agent for the building are determined, and the experimental efficiency is improved.

A method of reducing microorganisms in process water includes treating the process water with an organic amine and treating the process water with a biocide comprising methylisothiazolinone and methylchloroisothiazolinone. Treatment with both the biocide and the organic amine reduces microorganism viability in the process water more than treatment with the biocide alone.

The application provides a composite buffer and application and products thereof in Helicobacter pylori typing, and relates to the technical field of immunodiagnosis. The composite buffer provided by the application comprises Tris-HCl, NaCl, bovine serum albumin (BSA), polyethylene glycol nonylphenyl ether (NP40), methyl isothiazolinone (MIT), glycine, perfluorooctanoic acid and Proclin 300. The composite buffer provided by the application is combined with a chemiluminescence determination technology to detect Helicobacter pylori, and has the advantages of high sensitivity, good repeatability and strong anti-interference capability.

The invention discloses a preparation method of a stabilizer, arbutin and vinyl oleate react to obtain the stabilizer, the invention also discloses a preservative and a preparation method of the preservative, and the preservative comprises a solvent, 5-chloro-2-methyl-4-isothiazolin-3-one (CMIT), 2-methyl-4-isothiazolin-3-one (MIT) and the stabilizer. The stabilizer is added into the preservative for use, so that the chemical stability and application suitability of CMIT / MIT in a non-aqueous system can still be ensured while ions such as Ca < 2 + > and Mg < 2 + > are prevented from being introduced.

The invention relates to the technical field of protective coatings, in particular to an antibacterial coating for a vehicle chassis and a preparation method of the antibacterial coating. The antibacterial coating for the vehicle chassis is prepared from the following components in parts by weight: 30 to 50 parts of acrylic emulsion, 10 to 20 parts of a compound additive, 6 to 10 parts of nano calcium carbonate, 2 to 5 parts of silicon carbide, 2 to 4 parts of carbon black, 1 to 2 parts of bentonite, 2 to 3 parts of nano zinc oxide, 2 to 3 parts of dipropylene glycol butyl ether, 3 to 5 parts of tetraphenyl bisphenol-A-diphosphate, 0.6 to 1.2 parts of zinc strontium phosphate and 0.8 to 1.5 parts of iron oxide yellow. The coating is prepared from the following components in parts by weight: 0.2 to 0.5 part of 2-methyl-4-isothiazolin-3-ketone, 0.5 to 1 part of a flatting agent, 0.6 to 1.2 parts of a wetting agent, 0.5 to 1 part of a defoaming agent, 0.3 to 0.8 part of a dispersing agent and 10 to 20 parts of water. The antibacterial coating prepared by the invention not only has excellent antibacterial performance, but also has excellent wear resistance, so that the wear resistance of the vehicle chassis is effectively improved, and the probability that the vehicle chassis is scratched is reduced; and meanwhile, microbial erosion in a humid environment can be resisted, the durability and reliability of vehicle chassis protection are remarkably improved, and the service life of the vehicle chassis is prolonged to a certain extent.

The invention belongs to the field of daily chemical products, and particularly relates to mild and easy-to-wash pomegranate polyphenol hand sanitizer and a preparation method thereof. The hand sanitizer is prepared from the following raw materials: an anionic surfactant, a zwitterionic surfactant, cocamide DEA, glycerol, a pomegranate peel extract, citric acid, methyl chloride isothiazolinone, 0.001 part of methylisothiazolinone, 0.5 to 0.6 part of magnesium nitrate, 0.5 to 0.6 part of magnesium chloride, 0.5 to 0.6 part of sodium chloride and 70 to 75 parts of deionized water. The pomegranate polyphenol hand sanitizer prepared by the preparation method disclosed by the invention has natural bacteriostatic active substances, and compared with a traditional chemical bacteriostatic agent, the pomegranate polyphenol hand sanitizer is mild in bacteriostatic effect; in addition, ellagic acid, vitamins, pectin and other components in the pomegranate peel extract have excellent oxidation resistance and meanwhile have the skin moistening effect, a mild protective film is formed, and excessive loss of water in the cleaning process is reduced; and the hand sanitizer is good in safety, mild and non-irritant.

This invention discloses an antibacterial epoxy resin coating and its preparation process, belonging to the technical field of epoxy resin coatings. The coating comprises component A and component B. Component A includes an antibacterial epoxy resin, an active diluent, fillers, dispersants, defoamers, and rheology modifiers. Component B is a cycloaliphatic amine curing agent. The antibacterial epoxy resin is prepared by quaternizing 2-methyl-4-isothiazolin-3-one, then reacting it with hexamethylene diisocyanate to introduce isocyanate groups, and finally grafting it with bisphenol A type epoxy resin. This invention introduces two antibacterial groups, quaternary ammonium salt and isothiazolinone, into the epoxy resin molecular chain through chemical bonds. Their synergistic effect significantly enhances the broad-spectrum antibacterial properties of the coating, while avoiding the risk of antibacterial agent migration and precipitation. It exhibits strong antibacterial durability and is safe and environmentally friendly. This coating has excellent adhesion, heat resistance, and application performance, making it particularly suitable for places with extremely high cleanliness requirements, such as hospital operating rooms and intensive care units.

This utility model discloses a Kathon production apparatus, relating to the field of Kathon production technology. A 2-methyl-4-isothiazolin-3-one tank is connected to a dissolving tank, which in turn is connected to a phosphate buffer solution tank and a primary microchannel reactor. The primary microchannel reactor is connected to an activating chlorinating agent tank and a secondary microchannel reactor. The secondary microchannel reactor is connected to the activating chlorinating agent tank and a tertiary stabilizer. The inlet of the tertiary stabilizer is connected to a sodium thiosulfate solution tank, and the outlet of the tertiary stabilizer is connected to a Kathon product tank. This significantly improves product yield, shortens the reaction cycle, enhances safety, and is environmentally friendly. The microchannel reactor ensures efficient mass and heat transfer, reduces side reactions, and improves product purity. The tertiary stabilizer ensures complete removal of residual chlorine, improving product stability.

The application belongs to the technical field of organic synthesis, and particularly relates to a preparation method of 2-methyl-4-isothiazolin-3-one. The method comprises the following steps: taking an organic solvent as a solvent, adding an auxiliary agent A, adding N,N'-dimethyl-3,3'-dithiodipropionamide and chlorine gas in stages, and alternately adding the N,N'-dimethyl-3,3'-dithiodipropionamide and the chlorine gas, so as to obtain a liquid reaction material containing MIT hydrochloride; the generation of by-products is reduced by adding the N,N'-dimethyl-3,3'-dithiodipropionamide in batches, and the auxiliary agent A is directly mixed with the N,N'-dimethyl-3,3'-dithiodipropionamide, so that the generation of 5-chloro-2-methyl-4-isothiazolin-3-one is inhibited from the initial stage of the reaction. The method can improve the purity and the yield of 2-methyl-4-isothiazolin-3-one.