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64 results about "Methylperidol" patented technology
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Methylperidol hydrochloride Safety Profile Poison by ingestion, subcutaneous, and intravenous routes. When heated to decomposition it emits very toxic fumes of F − , HCl, and NO x .
Synthesizing technology of hindered amine light stabilizer Tinuvin-770
InactiveCN102382039ALow costNo pollution in the processOrganic chemistryOrganic solventHindered amine light stabilizers
The invention discloses a synthesizing technology of a hindered amine light stabilizer Tinuvin-770, which comprises the steps of: step 1, adding 2,2,6,6-tetramethyl-4-piperidinol, sebacic acid, catalyst and solvent into a four-neck flask to mix; step 2, starting a stirrer, heating, backflow distributing through a water segregator until no water drop is generated, and keeping back flowing for 1h; step 3, after finishing the back flowing, cooling the four-neck flask to 30-40 DEG C, washing with water for two times, and then steaming the solvent through reducing the pressure; and step 4, adding water to stir, after cooling and recrystallizing, carrying out the filtering centrifuging washing technology, and obtaining white crystalline powder, i.e. the sebacic acid bis(2,2,6,6-tetramethyl-4-piperidinol). The technology utilizes the sebacic acid for esterification reaction to substitute dimethyl sebacate for interesterification reaction and uses water for recrystallization to substitute organic solvent, so the cost of raw materials is reduced, the Tinuvin-770 which is synthesized by the technology has high yield and purity, good color and quality, and the technology is convenient to operate and is easy to carry out.
Owner:SUQIAN UNITECHEM CO LTD
Method and device for producing 2, 2, 6, 6-Tetramethyl-4-piperidinol through continuous catalytic hydrogenation
ActiveCN103274991ALight weightImprove mass transfer effectOrganic chemistryHigh concentrationReaction temperature
The invention belongs to the technical field of hindered amine light stabilizers, and discloses a method and a device for producing 2, 2, 6, 6-Tetramethyl-4-piperidinol through continuous catalytic hydrogenation. According to the technical scheme, the method includes steps as follows: tetramethyl piperidone and ethyl alcohol are mixed, so that a feed liquid is formed; then the feed liquid is placed in reaction kettles and taken as bottom materials, and a pumping mechanism is started and injects the feed liquid into a primary reaction kettle with a constant flow; the reaction temperatures of the reaction kettles are kept, a reaction fluid overflows from a previous reaction kettle to the next reaction kettle for reaction and then overflows to a rotary sedimentation separator; and the well reacted feed liquid is separated from a system through the separator. According the method and the device, relatively regular technological conditions can be realized, and the reaction can be always and continuously performed under conditions of high concentration, low temperature and lower pressure; hydrogen is not required to be evacuated and can be continuously and circularly used, the consumption of catalysts is reduced greatly, the operation condition is clear, stable and small in fluctuation, the operation safety is enhanced greatly, and the controllability is enhanced; and the reaction conversion rate of the process can reach 100%.
Owner:HENGSHUI KAIYA CHEM
High-quality polymerization inhibitor and preparation technology of same
InactiveCN103030590AGood inhibition effectIncrease added valueOrganic chemistryDistillation2,2,6,6-Tetramethylpiperidine
The invention discloses high-quality 4-methoxyl-2, 2, 6, 6-tetramethylpiperidinol (polymerization inhibitor 705 for short) and a preparation technology of the same. The high-quality polymerization inhibitor is prepared by the processes of: firstly, preparing tetramethylpiperidinol, and then, carrying out mixing, oxidizing, filtering, molecular distillation, packaging and on the like. The technology for preparing the polymerization inhibitor 705 comprises carrying out oxidization on tetramethylpiperidinol and acetaldehyde. According to the technology disclosed by the invention, the polymerization inhibitor 705 is obtained by molecular distillation and purification, thus, high-quality products can be provided for the clients and the company.
Owner:南通市振兴精细化工有限公司
Reaction type hindered amine light stabilizer and preparation method thereof
InactiveCN109678790AAvoid lostImprove the phenomenon of easy migrationOrganic chemistrySynthesis methodsHindered amine light stabilizers
The invention relates to a reaction type hindered amine light stabilizer and a preparation method of the reaction type hindered amine light stabilizer. The light stabilizer is prepared by dissolving tetramethyl-4-piperidinol and a derivative of the tetramethyl-4-piperidinol into a solvent, adding a polymerization inhibitor and alpha-beta unsaturated carboxylic ester, implementing an esterificationreaction under the action of a catalyst, washing with water, and desolventizing. According to the disclosed reaction type hindered amine light stabilizer and the preparation method of the reaction type hindered amine light stabilizer, the process is simple, the condition is mild, the purity of a produced product is high, and the yield is more than 90%. The synthesis method is simple to operate, the color of the product is light, and the light transmittance of the product is good.
Owner:宿迁联盛科技股份有限公司
Synthesis technology of tetramethylpiperidine
InactiveCN102351781AAvoid the disadvantage of being flammableHigh yieldOrganic chemistryWater bathsIce water
The invention discloses a synthesis technology of tetramethylpiperidine, comprising the steps of: first, adding triacetonamin, a catalyst, flake caustic soda and water into a high-pressure reaction kettle; second, introducing N2 to the kettle, then introducing H2 to replace N2; third, controlling the pressure within the kettle to be maintained at 0.8MPa, when the pressure in the kettle decreases, supplementing H2 timely to a pressure of 0.8MPa, conducting stirring simultaneously to raise the temperature which is controlled between 70 to 100DEG C, then repeating the above operations till the pressure in the kettle is constant at 0.8MPa; fourth, introducing N2 into the kettle to replace H2, and simultaneously delivering cooling water into a coiled pipe inside the kettle so as to lower the temperature in the kettle below 50DEG C, the stopping stirring, filtering out the catalyst, and distilling out part of the water; fifth, stirring and cooling the left oversaturated mother solution in ice water bath for crystallization, then carrying out filtering and washing, thus obtaining tetramethylpiperidine. The tetramethylpiperidine synthesized by the technology of the invention has the advantages of high yield and purity, good color and quality, and no environmental pollution, so that the technology provided in the invention is good for promotion and application.
Owner:SUQIAN UNITECHEM CO LTD
Yellowing inhibitor based on naphthalimide fluorescent whitening agent, and preparation method and application thereof
ActiveCN102887888AGive full play to synergistic advantagesSuccessful designOrganic chemistryLuminescent/fluorescent substance additionWhitening Agents2,2,6,6-Tetramethylpiperidine
The invention discloses a yellowing inhibitor based on naphthalimide fluorescent whitening agent, and a preparation method and application thereof. The preparation method comprises the following steps: taking cyanuric chloride as a crosslinking monomer, introducing free group trapping agent 2,2,6,6-tetramethyl piperylhydrazine or 2,2,6,6-tetramethyl piperidinol and naphthalimide fluorescent whitening agent into the same molecule, and further introducing an amino water-soluble compound, thus synthesizing a new pulp yellowing inhibitor having high yield. According to the invention, multiple functional groups are grafted in the same molecular structure, the yellowing of paper pulp is inhibited through multiple mechanisms and approaches, and the novel concept of multifunctional molecule design is embodied; and the yellowing inhibitor has a favorable effect of inhibiting the yellowing of paper pulp.
Owner:南京旭美化工有限公司
Water-soluble paper light stabilizer and preparation and applications thereof
InactiveCN103806339AThe synthesis method is simpleGood fluorescenceLuminescent/fluorescent substance additionSolubilityFluorescence
The invention relates to a water-soluble paper light stabilizer and a preparation method thereof. The preparation method of the water-soluble paper light stabilizer comprises the step of enabling 3-chloro-2-hydroxypropylsulfonate to react with 7-hydroxyl-4-methylumbelliferone fluorescent brightener, hindered amine light stabilizer amino-1,2,2,6,6-pentametylniperidine, hindered amine light stabilizer 1,2,2,6,6-pentamethyl-piperidinol respectively, so as to obtain a series of paper light stabilizers with better water solubility; the applications are as follows: matching the synthesized water-soluble coumarin fluorescent brightener with any water-soluble hindered light stabilizer for use, dissolving with gelatinized oxidized starch solution to obtain paper light stabilizer surface sizing material with better water solubility, and coating the sizing material on a high-yield size handsheet for inhibiting the yellowing of paper. The water-soluble paper light stabilizer has the advantages of being simple in the synthesis method, desirable in fluorescent brightening effect, good in thermal stability and the like, and the light-induction yellowing degree of the paper can be effectively reduced by fully utilizing the synergistic effect of the coumarin fluorescent brightener and the hindered amine light stabilizer.
Owner:SHAANXI UNIV OF SCI & TECH
Tris(1-alkoxy-4-hydroxy-2,2,6,6-tetramethyl piperidinol)phosphite and preparation method thereof
InactiveCN106916183AWeak alkalineImprove acid resistanceGroup 5/15 element organic compoundsAlkalinityHindered amine light stabilizers
The invention discloses a new N-alkoxy hindered amine compound-tris(1-alkoxy-4-hydroxy-2,2,6,6-tetramethyl piperidinol)phosphite and a preparation method thereof; the compound has the following structural formula described in the specification, wherein in the formula, R is C[n]H[2n+1]-, and n is 1, 2, 3...... The compound can be used as a multifunctional light stabilizer, and has extremely weak alkalinity; due to excellent acid resistance, the compound is especially suitable for agricultural plastic greenhouses and flame retardant plastics. The compound is prepared by esterification of 1-alkoxy-4-hydroxyl-2,2,6,6-tetramethyl piperidinol and PCl3. Compared with conventional similar products, the compound has the advantages of simple structure and easy synthesis.
Owner:QINGDAO UNIV OF SCI & TECH
Epoxy resin composition good in transparency and application thereof to field of cars
ActiveCN107090262ANon-macromolecular adhesive additivesMacromolecular adhesive additivesAntioxidantPolyvinyl chloride
The invention provides an epoxy resin composition good in transparency. The epoxy resin composition is prepared from the following components in parts by weight: 30 to 70 parts of bisphenol A epoxy resin, 10 to 35 parts of organic clay modified epoxy resin, 0.1 to 2 parts of light stabilizer, 0.1 to 2 parts of antioxidant, 10 to 25 parts of curing agent, 0.1 to 15 parts of diluting agent, 20 to 40 parts of filling matrial, 0.5 to 1.5 parts of coupling agent and 0.5 to 3 parts of thixotropic agent, wherein organic clay in the organic clay modified epoxy resin is a compound composition of sodium dodecyl sulfate grafted 2,4,6-trihydroxybenzoic acid and acrylic attapulgite clay; the curing agent comprises a polymercaptan curing agent and a modified amine curing agent; the light stabilizer is a compound macromolecular light stabilizer; the compound macromolecular light stabilizer is a copolymer of 2-phenylbenzimidazole-5-sulfonic acid and 2,2'-dihydroxy-4,4'-dimethoxybenzophenone grafted polyvinyl chloride and fumaric acid 2,2,6,6-tetramethylpipradrol polyethylene glycol monomethyl ether diester.
Owner:上海都昱新材料科技有限公司
PVC stabilizer with good heat and light stability, and preparation method thereof
ActiveCN106916335ALong thermal stability timeImprove thermal stabilityOrganic chemistryHeat stabilityStructural formula
The invention relates to a PVC stabilizer with good heat and light stability, and a preparation method thereof, and belongs to the technical field of PVC plastic assistants. The chemical structural formula of the PVC stabilizer is shown in the description; and in the formula, R is a carboxylic group, R1 is an organic acid radical, x is the valence of the R1, m is 0, 1, 2, 3, 4..., mx is less than n, M is a metal, and n is the valence of the metal. The preparation method comprises the following steps: carrying out an esterifying reaction on a phenyl diacid compound and 2,2,6,6-tetramethyl-4-piperidinol to generate a phenyl diacid ester of mono(tetramethylpiperidine), reacting the phenyl diacid ester of mono(tetramethylpiperidine) with the R1 acid and sodium hydroxide to generate a sodium salt, adding metal salt, and carrying out a metathesis reaction to obtain the target stabilizer, or directly reacting the phenyl diacid ester of mono(tetramethylpiperidine) with metal hydroxide or metal oxide at a high temperature to obtain the target stabilizer. The PVC stabilizer has good heat stability and good light stability, and the preparation method has the advantages of simplicity, easiness in condition control, good reappearance, and good development potential and application prospect.
Owner:BEIJING UNIV OF CHEM TECH
Technology for removing ammonia in ammoniacal smell ethanol in tetramethylpiperidinol
ActiveCN102816047ASimple methodEasy to operateHydroxy compound separation/purificationElutionFixed bed
The invention discloses a technology for removing ammonia in ammoniacal smell ethanol in tetramethylpiperidinol. The technology comprises an adsorption stage and an elution stage. The technology is characterized in that in the adsorption stage, an ammoniacal smell ethanol mixed solution enters into a highly acidic ion exchange resin fixed bed at a flow rate of 1 to 1.5L / min and liquid ammonia is adsorbed by a highly acidic ion exchange resin and eluate is a qualified ethanol solution; and in the elution stage, after adsorbed ammonia is saturated, the adsorbed ammonia is eluted from the highly acidic ion exchange resin fixed bed by a hydrochloric acid solution at a flow rate of 0.3L / min and liquid ammonia is recovered. The technology provided by the invention utilizes the highly acidic ion exchange resin fixed bed to treat ammonia in ethanol, replaces the existing neutralization ammonia-removal method, has simple processes, is convenient for operation and reduces energy consumption.
Owner:ZHENXING FINE CHEM CO LTD
Hindered amine modified lignin as well as preparation method and application thereof
ActiveCN108178835AHigh molecular weightHas anti-photolysis functionHindered amine light stabilizersEpichlorohydrin
The invention belongs to the technical field of lignin materials and discloses hindered amine modified lignin as well as a preparation method and an application thereof. According to the preparation method, 2,2,6,6-tetramethyl-4-piperidinol and epichlorohydrin are subjected to a reaction under the catalysis of a catalyst, and a chloro-tetramethylpiperidine intermediate is obtained; the chloro-tetramethylpiperidine intermediate and lignin react in an alkaline solution, and tetramethylpiperidine grafted lignin is obtained. The hindered amine modified lignin is prepared from components in parts by mass as follows: 100 parts of lignin, 10-20 parts of epichlorohydrin, 1-3 parts of a catalyst and 30-60 parts of 2,2,6,6-tetramethyl-4-piperidinol. The hindered amine modified lignin prepared with the method is novel modified lignin containing hindered amine groups, has photo-stabilization groups of hindered amine and aromatic ring structures of lignin, can serve as a polymeric photostabilizer to be used in various photodecomposition resisting fields such as pesticide preparations, coatings, ink, sun cream, high polymer materials and the like.
Owner:SOUTH CHINA UNIV OF TECH
Preparation method of hindered amine light stabilizer 770
InactiveCN103980185ASolve process problems such as low esterification rate and poor light transmittance of the final productLow equipment requirementsOrganic chemistryReaction temperatureDIMETHYL SEBACATE
The invention provides a preparation method of a hindered amine light stabilizer 770. According to the method, sebacic acid and tetramethylpiperidinol as reactants and an oxide and / or organic compound of the fourth main group element tin as a catalyst are subjected to a heating refluxing reaction in a solvent to obtain the hindered amine light stabilizer 770. The invention uses sebacic acid as raw material instead of dimethyl sebacate, and the sebacic acid under the effect of an appropriate catalyst performs a direct esterification dehydration reaction with tetramethylpiperidinol; and appropriate technology conditions such as an appropriate proportion of raw materials, reaction temperature adjustment and suitable solvent are employed to solve the technical problems of low esterification rate and poor light transmittance of a final product in a common direct esterification reaction, and to prepare the light stabilizer 770 product in line with the requirements of market quality standards. Compared with the ester exchange method in the prior art, the method has the advanategs of cheap raw materials, higher yield, low requirements for equipment, simple process and easiness for scale production.
Owner:新纶电子材料(常州)有限公司 +1
Manufacturing method of light-stability agent
The invention discloses a preparation method of a light stabilizer. Pent-amethyl and dimethyl sebacate conduct heating reaction under the function of a catalyst; the reaction product is cooled and added with measured petroleum ether; the mixture is washed by tap water into neutral for refining treatment, vacuum distillation is then conducted and qualified distillate is collected, thus obtaining the light stabilizer. The method adopts solvent-free transesterification reaction, conducts the reactions under the protection of inert gas while limitedly improving transesterification reaction temperature, ensuring fast reaction with less side reaction products; the post treatment purification adopts a combined rectification device, improving distillate producing rate and quality; the method eliminates chromogenic factors that can be produced, and can produce low-colority high-quality liquid light stabilizer GW508 products.
Owner:RUGAO DINGSHENG FINE CHEM IND
Light stabilizer composition and resin composition containing same
ActiveCN105612241AEasy to operateGood weather resistanceOther chemical processesChemical inhibitorsCarbonate esterHindered amine light stabilizers
Owner:ADEKA CORP
sPS (syndiotactic polystyrene) film for FPC (Flexible Printed Circuit) industry and preparation method thereof
InactiveCN109504318AImprove mechanical propertiesStrong mechanical propertiesNon-macromolecular adhesive additivesFilm/foil adhesivesTriethoxysilanePolystyrene
The invention provides a sPS (syndiotactic polystyrene) film and a preparation method thereof. The film is prepared from the following raw materials in parts by weight: 100 to 120 parts of modified sPS, 60 to 80 parts of adhesive resin, 10 to 15 parts of Degussa Dyhard 100, 5 to 10 parts of polyether modified polysiloxane, 5 to 10 parts of bis(3,5-tert-butyl-4-hydroxyphenyl) thioether, 1 to 4 parts of decabromodiphenyl ethane, 1 to 3 parts of bis(2,2,6,6-tetramethyl-4-piperidyl)sebacate and 1 to 3 parts of aminopropyltriethoxysilane. The modified syndiotactic polystyrene is added into the film; through the modification by oxidized graphene and aluminium oxide, the prepared modified syndiotactic polystyrene has good mechanical performance and high polarity; the conductivity and the flame-resistant performance are obviously improved; the wide application prospects are realized.
Owner:苏州市新广益电子股份有限公司
Scratch-resistant waterborne UV curing coating and preparation method thereof
ActiveCN105670491AImprove adhesionImprove scratch resistancePolyurea/polyurethane coatingsUV curingVinyltriethoxysilane
The invention discloses a scratch-resistant waterborne UV curing coating which is prepared from, by weight, 40-45 parts of aliphatic waterborne polyurethane acrylate, 2-2.5 parts of vinyltriethoxysilane, 38-40 parts of alumina sol, 2-3 parts of 2-hydroxy-4'-(2-hydroxyethoxy)-2-methylpropiophenone, 2-2.5 parts of bis(1,2,2,6,6-pentamethyl-4-piperidyl) sebacate and 10-15 parts of water. The water-soluble aliphatic polyurethane acrylate is used as the main material, the vinyltriethoxysilane is used as a modifying additive, and the water-soluble aliphatic polyurethane acrylate and the vinyltriethoxysilane are mixed with the alumina sol to prepare the organic-inorganic hybrid coating. The surface of paper or leather is coated with the coating, after UV curing, Si-O-Si and Si-O-Al bonds are formed in a coating film and formed between the coating film and a base material, and therefore the adhesive force of the coating film for the base material and the scratch resistance of the surface of the film are improved.
Owner:JIAXING UNIV
Method for preparing bis(1-alkoxy-2,2,6,6-tetramethyl piperidine-4-yl) sebate
The invention discloses a method for synthesizing bis(1-alkoxy-2,2,6,6-tetramethyl piperidine-4-yl) sebate. The bis(1-alkoxy-2,2,6,6-tetramethyl piperidine-4-yl) sebate is synthesized through transesterification by using dimethyl sebate and 1-alkoxy-2,2,6,6-tetramethylpipradrol as raw materials. According to the method, lithium hydroxide is adopted as a catalyst, a quaternary ammonium salt is adopted as a phase transfer catalyst, n-heptane is adopted as a methanol-carrying solvent, and methanol is separated continuously from the reaction system through a water knockout vessel. The process comprises the steps: adding dimethyl sebate, 1-alkoxy-2,2,6,6-tetramethylpipradrol, lithium hydroxide, the phase transfer catalyst and n-heptane to a reaction kettle with the water knockout vessel, performing heating to a reflux state so as to separate methanol continuously, stopping the reaction (about 5 hours later) until no separation of methanol, performing cooling to room temperature, performingwashing with deionized water, performing reduced pressure distillation on the oil phase so as to isolate the solvent and unreacted 1-alkoxy-2,2,6,6-tetramethylpipradrol and obtain a crude product, washing the crude product three times with a mixed solvent of methanol and water, and then performing distillation so as to isolate the solvent and obtain the final product. The method has the advantagesthat the process and the devices are simple, the catalyst has safe use, the product has easy separation, the product has high yield and high purity, and emission of three wastes is little.
Owner:山东兄弟科技股份有限公司 +1
Light stabilizer 298 and manufacturing process thereof
InactiveCN101367758APrevent photoagingEnvironmentally friendlyOrganic chemistryChemical inhibitorsWaste oilDouble bond
The present invention discloses a manufacturing process of a light stabilizer 298. The process provides a crude product which is synthesized through the reaction of methyl oleate and light stabilizer intermediate 2, 2, 6, 6-tetramethyl piperidinol in quantitative petroleum ether under the condition with a load catalyst tetrabutyl phthalicate, the methyl oleate is extracted with waste oil and has no toxicity or methyl oleate groups of large component, and the methyl oleate is added into the light stabilizer to prepare a novel highly efficient and non-toxic light stabilizer. On one hand, the light stability is maintained in the structure of the product; on the other hand, the adoption of double bond activity groups can lead the processing of the product into an auxiliary agent of larger molecular weight. The present invention can be used in the plastic packing, in particular in the food packing, and has excellent prospects for application.
Owner:南通市振兴精细化工有限公司
Polymerization inhibitor used for inhibiting polymerization of petroleum cracked C5 fraction
ActiveCN102101814AGood inhibition effectReduce dosageHydrocarbon purification/separationHydrocarbonsReboilerBoiling point
The invention relates to a polymerization inhibitor used for inhibiting polymerization of a petroleum cracked C5 fraction. The polymerization inhibitor consists of a component 1, a component 2, a component 3 and a solvent, wherein the component 1 is di methyl ketoxime; the component 2 is 2,2,6,6-tetramethyl-4-piperidinol; the component 3 is ortho-aminophenol; the solvent is acetonitrile or dimethylformamide; a weight ratio of the component 1 to the component 2 to the component 3 is 1:(0.1-2):(0.2-2.5); the component 1, the component 2 and the component 3 are 2 to 10 percent based on the weight of the solvent; and the using amount of the polymerization inhibitor in the petroleum cracked C5 fraction is 20 to 800ppm according to weight. The polymerization inhibitor provided by the invention has better polymerization inhibiting effect, can effectively inhibit auto polymerization or polymerization of diolefins in the petroleum cracked C5 fraction in a separating column, and avoids blockageof a reboiler; the using amount of the polymerization inhibitor is small and the production cost can be reduced; and the difference between boiling points of various components and the solvent of thepolymerization inhibitor and the boiling point of the petroleum cracked C5 fraction is great, so the petroleum cracked C5 fraction is easy to separate.
Owner:PETROCHINA CO LTD
Method for preparing rubber or resin multifunctional anti-aging agent
InactiveCN103030586AAnti-aging effect confirmedOrganic chemistryTetraisopropyl titanateAging resistance
The invention discloses a method for preparing a rubber or resin multifunctional anti-aging agent. The synthesis of the anti-aging agent comprises the following two steps of: synthesizing a highly symmetrical intermediate with a dendritic structure from phenylenediamine and methyl acrylate through a Michael addition reaction; and carrying out an ester exchange reaction on the intermediate and 1,2,2,6,6-pentamethyl-piperidinol to synthesize the anti-aging agent under the condition of taking tetraisopropyl titanate as a catalyst. The anti-aging agent contains heat-resistant oxygen groups and light-stabilizing groups, and when the anti-aging agent is added into rubber or resin, the period of heat oxygen resistance and light aging resistance is delayed.
Owner:SOUTHWEAT UNIV OF SCI & TECH
Preparation method of UV770
ActiveCN105906550AFewer separation stepsIncrease the frequency of collisionsOrganic chemistryAlcoholNitrogen
The invention relates to a preparation method of UV770. The preparation method comprises the following steps: (S1) adding (a) 2,2,6,6-tetramethylpiperidine alcohol with the formula shown in the specification and (b) sebacic acid with the formula shown in the specification into a reaction tank, and carrying out fusion mixing; (S2) introducing nitrogen to protect the reaction; (S3) adding titanium catalysts into the reactor, and carrying out thermal response reaction; (S4) cooling reactants to 100-110 DEG C after the reaction is finished, and immediately filtering; and (S5) cooling filtrate, separating out crystals, washing, and further refining rough products to obtain the purified product UV770, or evaporating water to directly obtain the product. The preparation method has the characteristics of high reaction efficiency and convenience in refining.
Owner:杭州欣阳精细化工有限公司
Formaldehyde removal and odor removal spraying solution
InactiveCN109289429AGood deodorizing effectRaw materials are non-toxic and harmlessGas treatmentDispersed particle separationCarboxymethyl celluloseSolvent
The invention relates to a formaldehyde removal and odor removal spraying solution, which comprises the following raw materials by weight: 15-19 parts of 1-chloro-2,2,6,6-tetramethylpiperidinol, 10-14parts of N,N-dichloro-4-methylbenzenesulfonamide, 5-10 parts of carboxymethyl cellulose, 4-6 parts of essential oil, 6-8 parts of a dispersant, and 40-50 parts of a solvent. According to the presentinvention, the formaldehyde removal and odor removal spraying solution has characteristics of non-toxic and harmless raw materials, low cost and good formaldehyde removal and deodorization effect.
Owner:南京海洛阿姆生物科技有限公司
Light stabilizer for weather-resistant polyvinyl chloride (PVC) material, and preparation method and application thereof
InactiveCN110256730AGood weather resistanceImprove thermal stabilityOrganic chemistryFiltrationUltraviolet lights
The invention discloses a light stabilizer for a weather-resistant PVC material, and a preparation method and application thereof. The preparation method for the light stabilizer comprises the following steps: sequentially adding cyanuric chloride, 2,2,6,6-tetramethyl pipradrol compound and potassium carbonate into a tetrahydrofuran solution in a nitrogen atmosphere, and performing stirring under reflux; and cooling reaction liquid to room temperature, performing suction filtration to obtain a crude product, washing the crude product with hot water a plurality of times, and performing drying so as to obtain the light stabilizer for the weather-resistant polyvinyl chloride material. According to the light stabilizer of the invention, a triazine structure and a piperidine structure are combined together, so the light stabilizer absorbs ultraviolet light while capturing free radicals generated during the photodegradation process of PVC, thereby greatly improving the weather resistance of the PVC material; a heat stabilizer system of the invention has the stability mechanisms of three different heat stabilizers; the preparation method is simple; and after the heat stabilizer is added into the PVC material, the thermal stability of the PVC material is greatly improved.
Owner:SOUTH CHINA UNIV OF TECH
Novel hindered amine light stabilizer preparation method
PendingCN110357807AFew synthetic stepsGood compatibilityOrganic chemistryMonocomponent polyolefin artificial filamentEngineering plasticSolvent
The invention relates to a novel hindered amine light stabilizer preparation method, which specifically comprises: (1) dissolving vanillin in a solvent, adding sodium chlorite, and performing an oxidation reaction to form a carboxyl group-containing compound; (2) adding methanol to the carboxyl group-containing compound, and performing an esterification reaction to obtain an ester compound; and (3) mixing the generated ester compound and tetramethylpiperidinol, adding a catalyst, and performing a reaction to obtain the hindered amine light stabilizer. According to the present invention, the synthetic raw material vanillin of the hindered amine light stabilizer is easy to obtain and non-toxic, the product synthesis steps are less, and the reaction conditions are mild; and the light stabilizer has good compatibility with polymers, especially engineering plastics, and further has excellent processing performance and excellent anti-aging effect.
Owner:宿迁联盛科技股份有限公司
Environment-friendly latex paint used for interior wall and preparation method thereof
InactiveCN107118670AGuaranteed waterproof performanceGuaranteed consistencyFireproof paintsAntifouling/underwater paintsEpoxyAcrylic resin
The invention discloses environment-friendly latex paint used for an interior wall. The environment-friendly latex paint is prepared from the following raw materials: epoxy resin, acrylic resin, castor oil, dimethyl silicone oil, sodium alginate, polyoxyethylene aliphatic ether sodium sulfate, mica powder, carboxymethylated chitosan, zinc sulfate, 4-methyl-4'-vinyl benzophenone, 2,2,6,6-tetra-methylpiperidine benzoate, a curing agent, ethanol and water. A preparation method comprises the following steps: preparing resin mixed liquor, mixing in the castor oil, dimethyl silicone oil, 4-methyl-4'-vinyl benzophenone and 2,2,6,6-tetra-methylpiperidine benzoate, preparing an aqueous solution, mixing in the aqueous solution, and dispersing the mica powder and the curing agent. The latex paint disclosed by the invention has the advantages that raw materials are cheap and available, environmental friendliness, scrubbing property, good antibacterial effect, appropriate workability, good stability, difficulty in ageing and direct brushing are realized, and the preparation method provided by the invention is low in requirement on equipment and reasonable and simple in operation, so that industrial production can be carried out.
Owner:六安三创建筑材料有限公司
A method and device for producing tetramethylpiperidinol by continuous catalytic hydrogenation
Owner:HENGSHUI KAIYA CHEM
Compound type macromolecular light stabilizer based on Diels-Alder click chemistry and preparation method thereof
ActiveCN106589237AExcellent broad-spectrum UV absorption functionGood compatibilityOrganic chemistryClick chemistryUltraviolet absorption
The invention discloses a preparation method of a compound type macromolecular light stabilizer based on Diels-Alder click chemistry. The preparation method comprises the following steps: performing a Diels-Alder reaction by using 3-(N,N-2-maleimido ethyl propionate-aminomethyl)-2,4-dihydroxy benzophenone and sebacic acid difurfuryl ester as raw material monomers; and then adding 2,2,6,6-tetramethyl-piperidine maleimide propionate as an end-capping reagent to prepare the compound type macromolecular light stabilizer, wherein the added amount of the end-capping reagent is 0.1-2% of the total weight of the raw material monomers. The invention discloses the compound type macromolecular light stabilizer based on the Diels-Alder click chemistry. The compound type macromolecular light stabilizer prepared by the preparation method disclosed by the invention has an excellent broad-spectrum ultraviolet absorption function, has a dual-light stabilizer effect of ultraviolet absorption and free radical capturing function, and has good compatibility with most high polymer materials.
Owner:江苏多淇医疗设备有限公司
Preparation method of rubber or resin light stabilizer
InactiveCN104292148AImprove photostabilityGood anti-aging performanceOrganic chemistryMethylperidolSodium methoxide
The invention discloses a preparation method of a rubber or resin light stabilizer. The synthesis of the light stabilizer comprises two steps: firstly, with piperazine hexahydrate and methyl acrylate as raw materials, synthesizing a piperazine light stabilizer through Michael addition reaction under catalysis of graphene oxide; and carrying out transesterification on the stabilizer and 1,2,2,6,6-pentamethyl-4-piperidinol under catalysis of sodium methoxide to obtain the light stabilizer containing piperazine and piperidine functional groups. According to the preparation method disclosed by the invention, the original light stability is improved; meanwhile, the rubber or resin light stabilizer is a high-efficiency thermal antioxidant; and the service life can be prolonged by adding the rubber or resin light stabilizer to rubber or resin.
Owner:SOUTHWEAT UNIV OF SCI & TECH
Light stabilizer intermediate 2,2,6,6-tetramethyl-4-piperidine ester compound and preparation method thereof
ActiveCN105566204AAvoid disadvantagesImprove light aging resistanceOrganic chemistryOrganic-compounds/hydrides/coordination-complexes catalystsChemical reactionPolymer science
The invention provides a preparation method of a light stabilizer intermediate 2,2,6,6-tetramethyl-4-piperidine ester compound (1) obtained by chemical reaction of both 2,2,6,6-tetramethyl-piperidine and unsaturated organic dibasic acid shown in the formula (II). The invention further provides a 2,2,6,6-tetramethyl-4-piperidine ester light stabilizer conforming to the formula (I), and the light stabilizer is mainly applied to plastic films, coatings, paper-making, engineering plastics and other high polymer materials, and can directly participate in chemical reaction and remarkably improve the product light aging resistance and prolong the product service life. As a (SO4)2- / TiO2-ZnO mixed crystal solid-acid support coordination catalyst is adopted, the advantages of easy separation from a reaction system, no equipment corrosion and good environmental protection performance are achieved.
Owner:SHANGHAI DONGSHENG NEW MATERIALS
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