38 results about "Dibutyltin dichloride" patented technology

The invention relates to a PMC (polymer-matrix composite) radiation-proof resin lens, comprising the following components in percentage by weight:47-50% of a first mixture, 50-53% of a second mixture, 0.05-0.10% of an ultraviolet absorbent, 0.045-0.055% of a blue organic pigment, 0.025-0.035% of a red organic pigment, 0.04-0.07% of a mold releasing agent, and 0.06-0.10% of dibutyltin dichloride. By adopting the PMC radiation-proof resin lens, the visual field aberration caused by edge dispersion of a substrate can be greatly improved, the image sharpness is improved, and the shock resistance passes through and surpasses an FDA (Food and Drug Administration) shock resistance safety certification of America, so that the safety for wearing the resin lens is greatly improved.

The invention relates to an ultrafine dibutyltin oxide and a preparation method thereof, and belongs to the technical field of preparation of ultrafine powder catalysts. The preparation method concretely comprises the following steps: 1, heating dibutyltin dichloride to a certain temperature in order to liquefy dibutyltin dichloride , and introducing the liquefied dibutyltin dichloride to an atomizer; 2, starting the atomizer to atomize the liquid dibutyltin dichloride ; 3, spraying atomized dibutyltin dichloride flow into a reaction kettle equipped with an alkali liquid, fully mixing the flow with the alkali liquid, and carrying out a primary reaction; 4, separating the obtained liquid after the primary reaction ends, adding the alkali liquid, carrying out a secondary reaction, and carrying out a tertiary reaction; and 5, washing a material obtained in step 4 with water, centrifuging the washed material, carrying out vacuum drying, discharging the dried material, and weighing the discharged material to obtain the required ultrafine dibutyltin oxide product. Ultrafine dibutyltin oxide synthesized through the method is fine and uniform, has high purity, and can be used as an electrophoresis paint catalyst.

The invention discloses a synthesis method of dibutyltin dilaurate, belonging to the field of organic synthesis. The synthesis method comprises the following steps of: 1, adding lauric acid, dibutyltin dichloride and ethanol into a reactor with a condenser pipe, heating and stirring mixed solution in the reactor, dropping sodium ethoxide-ethanol solution when temperature reaches 50-60DEG C; 2, after the sodium ethoxide-ethanol solution is completely dropped, maintaining the temperature, turning on a cooling water tap after reaction, starting to vacuumize, evaporating ethanol solvent, and stopping vacuumizing and heating when the temperature of the mixed solution in the reactor again reaches 70DEG C and no liquid is distilled off; and 3, conducting separation. By adopting the method of evenly mixing the dibutyltin dichloride instead of dibutyltin oxide with the lauric acid and then dropping sodium ethoxide-ethanol solution to prepare the dibutyltin dilaurate, the step of hydrolyzing dibutyltin dichloride in caustic soda solution is omitted, toxic dust and wastewater are not produced, the environmental and personal health is promoted and water resources are saved.

The invention discloses a low temperature resistant silicone rubber material and a preparation method thereof. The rubber material consists of the following raw materials by weight: 90-110 parts of low phenyl silicone rubber, 40-60 parts of diethyl silicone rubber, 5-10 parts of triallyl cyanurate, 3-6 parts of tetraethylene glycol, 10-15 parts of yellow mud powder, 5-10 parts of hydroxyl terminated polybutadiene, 2-3 parts of dibutyltin dichloride, 1.5-2.5 parts of polycarbodiimide, 3-5 parts of trimethylolpropane cocoate, 4-8 parts of polyether epoxy modified silicone oil, 2.5-4.5 parts of erucyl amide, 5-10 parts of diisobutyl ester of nylon acids, 10-15 parts of triethylene glycol di-2-ethylhexoate(triglycol dioctate), 12-16 parts of basic magnesium sulfate whisker, 2-3 parts of 4,4-dityrenated diphenylamine, 1-2 parts of tetramethylthiuram disulfide and 3.5-4.5 parts of an assistant. The silicone rubber product provided by the invention has stable performance and excellent resistance to low temperature performance, and can work in cold conditions over a long period of time and still keep high tensile strength, tear strength and high elongation at break; and the silicone rubber material has good aging resistance, fatigue resistance and oil resistance, fully meets the usage requirements of cold areas in northern China, and shows broad application prospect.

The invention discloses tread rubber for a carbon nano tube composite high-performance tire. The tread rubber is prepared from, by weight, 100 parts of environment-friendly regeneration rubber, 50-60 parts of carbon nano tube rubber master batch, 40-60 parts of pyrolysis carbon black, 80-100 parts of natural rubber, 15-25 parts of zinc oxide, 8-12 parts of dibutyltin dichloride, 5-9 parts of coupling agent and 8-12 parts of a vulcanizing agent. The invention further discloses application thereof for a high-performance tire tread. The excellent nano tube excellent performance advantage is brought into play, the production cost of the tire is effectively lowered, the tread rubber has the advantages of being high in abrasion resistance and heat conductivity coefficient, low in rolling resistance and endurance thermogenesis, and low in production cost. The tread rubber for the carbon nano tube composite high-performance tire is free from extraneous odor, does no harm to the human body, remarkably improves the various performances, can be used for producing the high-performance rubber, is safe and environmentally friendly, and has the wide market prospect.

The invention provides a preparation method of monobutyltin oxide. The method includes the steps of firstly, adding tetrabutyl tin into a reactor, evenly stirring, slowly dropwise adding tin tetrachloride, then stirring for 30 minutes, heating to 140 DEG C, and performing heat-preservation reaction for 4-8 hours to obtain the mixed solution of monobutyltin trichloride and dibutyltin dichloride; secondly, heating the mixed solution of the monobutyltin trichloride and the dibutyltin dichloride to 95-100 DEG C, and collecting the monobutyltin trichloride; thirdly, adding the monobutyltin trichloride collected in the second step, surfactant and an organic solvent into a reactor, evenly stirring, slowly dropwise adding a sodium hydroxide solution, then heating to 90 DEG C, performing heat-preservation reaction for 3.5-4 hours, cooling to room temperature, filtering to obtain crude monobutyltin oxide, washing the crude monobutyltin oxide until the crude monobutyltin oxide is neutral, and performing reduced-pressure drying at 80 DEG C for 12 hours to obtain the monobutyltin oxide, wherein the surfactant is chitosan modified imidazoline ampholytic surfactant and quaternized polyvinyl alcohol.

The invention discloses a method for recovering and utilizing tributyl tin chloride. The method comprises following steps: (1) heating and distilling tributyl tin chloride with a weight content less than 80% in a hydrogen chloride atmosphere with a high vacuum degree of 20 Pa, wherein the final temperature is 140 to 160 DEG C; (2) after vacuum distillation, mixing obtained tributyl tin chloride product with tin tetrachloride, carrying out reactions at a controlled temperature to obtain a mixture composed of monobutyl tin trichloride and dibutyl tin dichloride; and (3) distilling and separatingthe mixture obtained in the step (2) to obtain monobutyl tin trichloride and dibutyl tin dichloride. The method has the advantages that the difference between the melting points of monobutyl tin trichloride and dibutyl tin dichloride is large, thus the separation is easy, the generated wastes are little, the production is easy, monobutyl tin trichloride and dibutyl tin dichloride can be individually sold, and the waste tributyl tin chloride catalysts are fully recovered and utilized.

The present invention relates to a composition for an optical material, which is capable of suppressing occurrence of polymerization unevenness called striae, in particular, striae to be caused in high-powered lenses with sharp curves, and more specifically relates to a composition for an optical material including: a polymerization catalyst having a mass ratio of dibutyltin dichloride to monobutyltin trichloride of 97.0/3.0 to 100.0/0.0; a polythiol compound; and a polyiso(thio)cyanate compound.

The invention discloses polyvinyl chloride and polyethylene composite modified plastic. The polyvinyl chloride and polyethylene composite modified plastic comprises polyvinyl chloride, polyethylene and additives, wherein the additives comprise a plasticizer, a filler, a thermal stabilizer, a weather resistant agent and an antioxidant, the plasticizer is diisopropyl phthalate, the filler is emery, the thermal stabilizer is dibutyltin dichloride, the weather resistant agent is phenyl salicylate, and the antioxidant is butyl hydroxy anisd. Therefore, the made polyvinyl chloride and polyethylene composite modified plastic has the effects of high rigidity, good mechanical strength, good weather resistance, good thermal stability, aging resistance and the like.

The present invention discloses a trelagliptin succinate synthesis process, and relates to the technical field of pharmaceutical chemical synthesis. In the process, 2-cyano-5-fluorobenzyl bromide and 6-chloro-3-methyl uracil are adopted as starting raw materials, and condensation reaction is performed under the action of cuprous acetylacetonate and an acid-binding agent I to prepare an intermediate 1; then the intermediate 1 and (R)-3-aminopiperidine dihydrochloride are subjected to a condensation reaction under the action of dibutyltin dichloride and an acid-binding agent II to prepare an intermediate 2, and the intermediate 2 and succinic acid are subjected to a salt forming reaction to prepare trelagliptin succinate. Herein, the acid-binding agent and the catalyst are matched to improve the yield of the intermediate 1 and the intermediate 2, so that the total yield of the trelagliptin succinate is improved, the total yield reaches 80% or above, and the purity of the trelagliptin succinate reaches 99.5% or above.

The invention discloses a fluorine-containing aromatic ring carboxylic acid tetramer compound, and a preparation method and an application thereof. The preparation method comprises the following steps: adding 1.0 mmol of 2-amino-4,5-difluorobenzoic acid, 1.0 mmol of sodium ethoxide, 1.0 mmol of dibutyltin dichloride and 20-60 mL of methanol into a reaction container, performing stirring at 50 DEGC for 5 hours, and carrying out rotary evaporation to obtain a faint yellow powdery solid; and recrystallizing the faint yellow powdery solid with dichloromethane-n-hexane to obtain a faint yellow transparent crystal that is the fluorine-containing aromatic ring carboxylic acid tetramer compound, wherein a volume ratio of dichloromethane to n-hexane is 3:1 to 6:1. The fluorine-containing aromaticring carboxylic acid tetramer compound has anti-neuroblastoma activity. In the formula, n-Bu represents an n-butyl group.

The invention discloses a macromolecular resin lens with high refractive indexes. The macromolecular resin lens with high refractive indexes is prepared from the following raw materials in percentageby weight: 15-25% of dibutyl phthalate, 5-20% of allyl alcohol, 30-50% of isocyanate, 0.002-0.05% of dibutyltin dichloride, 0.06-0.1% of a photo-curing initiator, and the balance of methyl styrene. The invention further provides a preparation method of the macromolecular resin lens with high refractive indexes. The macromolecular resin lens with high refractive indexes and the preparation method thereof are capable of reducing weight of lens and improving refractive indexes of resin.

The invention discloses an asymmetric out-of-focus lens which comprises a substrate and a protective film, wherein the substrate is made of a resin material, and comprises the following components in parts by weight: 30-50 parts of a polyisothiocyanate compound, 50-60 parts of a thiol compound, 2-3 parts of a catalyst and 5-8 parts of an ultraviolet absorbent. The catalyst is selected from two of dibutyltin dichloride, stannous octoate, methyltin trichloride, trimethyltin chloride or dibutyltin dilaurate and is mixed in equal proportion, the ultraviolet absorbent is prepared by uniformly dispersing rare earth oxide with the diameter of 20-30 nm in an alcohol ether solvent, and the mass concentration of the rare earth oxide in the alcohol ether solvent is 0.1%-0.5%. According to the invention, the ultraviolet absorption layer can obviously reduce the intensity of ultraviolet rays visually, so that the damage of the ultraviolet rays to the eyes of a user is reduced, and the use safety is improved; the light transmittance of the lens can be obviously improved through a light absorption indication layer and a photosensitive color-changing layer, so that the definition of the lens is improved to a certain extent.

The invention discloses a novel aromatic carboxylate compound, and a preparation method and an application thereof. The structural formula of the compound is shown in the description. The preparationmethod comprises the following steps: adding 1.0 mmol of H3tmapob, 1.0 mmol of sodium ethoxide, 1.0 mmol of dibutyltin dichloride and 20-50 mL of dichloromethane into a reaction container, performingstirring at 30 DEG C for 5-7 h, and carrying out rotary evaporation to obtain a faint yellow powdery solid; and recrystallizing the faint yellow powdery solid with dichloromethane-diethyl ether to obtain a faint yellow transparent crystal that is the carboxylate compound, wherein a volume ratio of the dichloromethane to diethyl ether is 8:1 to 6: 1. Compared with platinum anticancer drugs commonlyused at present, the novel aromatic carboxylate compound has the characteristics of high anti-human prostate cancer cell activity, good lipid solubility, low cost, simple preparation method and the like, and provides a new way for developing anticancer drugs. In the formula, n-Bu represents an n-butyl group.