12 results about "Naphthalene" patented technology

The invention discloses an environment-friendly polyurethane adhesive, and a preparation method and applications thereof. The environment-friendly polyurethane adhesive comprises a polyurethane resin A component, a polyurethane resin B component, and a catalyst. The polyurethane resin B component comprises isocyanate 1 and isocyanate 2, wherein the isocyanate 1 is isophorone diisocyanate, and the isocyanate 2 is one or more of m-xylidenediisocyanate (XDI), hexamethylene diisocyanate (HDI) trimer, and 1,5-naphthalene diisocyanate (NDI). The catalyst is a mixture of a delaying catalyst and a low temperature thermal sensitive catalyst. The problem of bad yellowing resistant performance of conventional adhesives is prominently improved. The heatproof property, flexibility, and hydrolysis resistant performance of finished products of adhesive are all enhanced. Moreover, the provided adhesive is environment-friendly and degradable, and can be easily recovered and utilized. The resources are saved, the operability of the adhesive is improved, and the curing time of the adhesive is shortened.

The invention provides a wax-based binder for a compacting process in powder metallurgy as well as a preparation method and an application thereof. The binder consists of the following components by mass percent: 60 to 80 percent of solid paraffin, 3 to 10 percent of liquid paraffin, 1 to 10 percent of naphthalene, 2 to 9 percent of polyethylene vinyl acetate, 4 to 15 percent of polyolefin and 1 to 10 percent of stearic acid. The components of the binder are good in compatibility, the rheological property is good, the solvent degreasing rate is high, the retraction property is moderate, the degreasing blank is few in flaws, and the conformality is good; the binder also has the characteristics of cleanliness, low residue, little pollution and the like.

A modified dimethylnaphthalene formaldehyde resin is disclosed, which is excellent in heat resistance and useful for thermosetting resins which are used for an electrical insulating material, a resin for resist, a semiconductor sealing resin, an adhesive for printed wiring board, a matrix resin for electrical laminate or prepreg to be mounted in electrical instruments, electronic instruments, industrial instruments, etc., a buildup laminate material, a resin for fiber-reinforced plastic, a sealing resin for liquid crystal display panel, a paint, a variety of coating agents, an adhesive, a laminate for electrical or electronic parts, a molded article, a coating material, a sealing material and the like, the modified dimethylnaphthalene formaldehyde resin being obtained by modifying a polyfunctional dimethylnaphthalene formaldehyde resin having a constituent unit represented by the following general formula [1] in a molecule thereof with at least one member selected from the group consisting of a phenol represented by the following general formula [2], a naphthol represented by the following general formula [3] and a naphthol represented by the following general formula [4] (provided that at least any of the naphthol represented by the general formula [3] or the naphthol represented by the general formula [4] must be included).

The invention discloses an abrasive-containing emulsifying compound metal cutting solution. The cutting solution is characterized by being prepared from the following raw materials in parts by weight: 3-5 parts of aluminum hydroxide powder, 1-2 parts of hydroquinone, 2-4 parts of aluminum nitride, 4-6 parts of nano medical stone powder, 1-2 parts of stannous chloride, 2-3 parts of sodium metasilicate pentahydrate, 5-6 parts of sodium dibutyl naphthalene sulfonate, 1.5-2.5 parts of propylene glycol alginate, 2-4 parts of alpha-sulfomonocarboxylate, 5-7 parts of aid and 200 parts of deionized water. The added abrasive such as the nano medical stone is matched with a surfactant, so that the cutting solution disclosed by the invention has good dispersibility and abrasion resistance and has the effects of sterilization and deodorization; the abrasion resistance, dispersibility, lubricity and film-forming property are strengthened by adding the aid; the aid is matched with the surfactant, so that the cutting solution has excellent lubricity, abrasion resistance and cleaning and cooling property; the cutting solution disclosed by the invention, which is in the shape of water-based emulsion, is excellent in performance, simple and feasible in processing technology and low in cost.

The invention relates to a dynamic crystallizer. A skirt barrel is installed below a collecting tank barrel, a crystallizer barrel is installed above the collecting tank barrel, the upper portion inside the skirt barrel is provided with a sealing head disposed on the lower portion of the collecting tank barrel, and the top of the crystallizer barrel is provided with a feeding port. An upper pipe plate and a lower pipe plate are arranged in the crystallizer barrel up and down, two layers of medium liquid distributors are arranged between the two pipe plates, 810 falling film thin-wall column pipes are evenly distributed between the two pipe plates, each falling film column pipe penetrates the two layers of medium liquid distributors, a heating coil pipe a is arranged below the lower pipe plate, the bottom end of the collecting tank barrel is provided with the sealing head, the outer portion of the sealing head is provided with a heating coil pipe b, and a product outlet is arranged at the center of the sealing head. The invention further provides a processing process for producing high-purity refined naphthalene by utilizing the dynamic crystallizer. The dynamic crystallizer and the processing process for producing high-purity refined naphthalene by utilizing the same have the advantages that process links are fewer, a process technology is advanced, process parameters are controlled easily, energy consumption is low, and production efficiency is effectively improved.

The invention relates to the technical field of preparation of a modified naphthalene-based superplasticizer, in particular to a method for preparing the modified naphthalene-based superplasticizer from heavy fraction obtained in production process of ethyl alcohol. The method includes the steps of firstly, adding crude naphthalene into a four-neck flask, heating until crude naphthalene is moltencompletely, stirring while adding industrial concentrated sulfuric acid dropwise, and then holding the temperature and detecting the pH value; secondly, cooling to a certain temperature, replenishinga proper quantity of water according to the pH value, performing hydrolysis, after that, adding rectified heavy fraction with stirring; thirdly, adding formaldehyde solution dropwise after finishing stirring, holding the temperature for a while, and then adding alkali liquor slowly to regulate the pH value. The method solves the problems of complex recovery, treatment difficulty, high energy consumption, high cost and the like of heavy fraction generated in the rectification of ethyl alcohol. In the process of condensation, the naphthalene-based superplasticizer is grafted, number and type ofbranches of the naphthalene-based superplasticizer are both increased, and water-reducing rate of concrete can be increased while slump effect can be improved.

The invention discloses a medicament used for controlling plant virus diseases, which consists of the matters such as propolis, 5-nitroguaiacol sodium, ribavirin, (Alpha-morpholine Alpha-formimino group)-carbamidine, aminophenol, Carbamide, pyridyl-3-formamide, Alpha-sodium naphthalene acetate, organic peptide, VB-family, Cu, Zn, Vc, solvent, etc. The medicament of the invention has triple efficacies: alimentation, conditioning and anti-bacteria, has strong restraining, passivation and curing effects on plant viruses such as maize rough dwarf virus, maize dwarf mosaic virus, maize strip dwarfvirus, cucumber mosaic virus, tobacco spot virus, tobacco necrosis virus, and the like, has high cure rate and has the advantages of organics, no toxicity, no residues and no public harms.

The invention discloses a preparation method of a dapoxetine hydrochloride racemate, which comprises the following steps: by using 1-(3-phenylpropoxy) naphthalene as a raw material, carrying out halogenation, amination, hydrogenation dehalogenation and the like to obtain a dapoxetine hydrochloride racemate (V); the method disclosed by the invention is high in yield, convenient in post-treatment and more suitable for industrial production.

The present invention discloses a liquid crystal composition for a polymer stabilized vertical alignment liquid crystal display (PS-VA LCD) and a liquid crystal display panel thereof; the liquid crystal composition comprises at least one type of negative liquid crystal material, a type of stabilizer and one or more type of reactive monomers; the structural formula of the reactive monomer consists of one benzene ring, two benzene rings or one naphthalene ring, the structure of two benzene rings is formed by connecting the two benzene rings directly or indirectly with a group, at least one polymerizable group is connected directly to the benzene ring and naphthalene ring, and at least one of polymerizable groups is an acrylate group. Reaction rate of the reactive monomer and uniformity of polymer bumps are improved by selecting polymerizable groups of the reactive monomer and controlling the content thereof to effectively solve quality issues of panels.

The invention discloses a method for producing a high-sulfur petroleum coke slurry additive, which comprises the following steps: uniformly mixing sodium lignin sulfonate, sodium dodecyl benzene sulfonate, a sodium naphthalene sulfonate formaldehyde high-molecular polymer, ethylene glycol and water, and heating; adding carboxymethyl cellulose and sodium hydrogen sulfite, and stirring to obtain a petroleum coke slurry additive; the method can obviously improve the concentration of the petroleum coke slurry, reduce the bleeding rate, improve the stability and efficiently utilize the petroleum coke in an environment-friendly manner, is suitable for gasification or incineration of the petroleum coke, and has creative significance in efficient utilization of the high-sulfur petroleum coke.