59results about How to "Moderate response speed" patented technology

The invention discloses a scraping coating type polyurea elastomer corrosion-resistant and wear-resistant material and a preparation method thereof. The scraping coating type polyurea elastomer corrosion-resistant and wear-resistant material is characterized by comprising an ingredient A and an ingredient B, wherein the ingredient A is prepolymers with NCO end groups obtained through the reaction between 30 to 40 mass percent of polyether polyol and 60 to 70 mass percent of polyisocyanates; the ingredient B is prepared from 30 to 40 mass percent polyaspartic acid ester, 60 to 70 mass percent of filling materials and a small number of auxiliary agents through high-speed dispersion grinding. In the use process, the prepared ingredient A and the prepared ingredient B are weighed according to the weight ratio of 1:4, and are then uniformly mixed; next, scraping coating construction is performed. The material has the characteristics of high mechanical intensity, corrosion resistance, wear resistance, good anti-seeping performance, aging resistance, proper reaction speed, no solvent, convenient construction and the like. The scraping coating type polyurea elastomer corrosion-resistant and wear-resistant material is particularly suitable for industrial and mining enterprise equipment and spare part anti-corrosion wear-resistant liners.

The invention provides a grouting and hole-sealing material used for drilling of underground coal mine gas. The material comprises a dry grouting and hole-sealing material and water, wherein a weight ratio of the dry grouting and hole-sealing material to water is 1: 0.8-1.2; the dry grouting and hole-sealing material is composed of the following substances: Portland cement, fly ash, desulphurized gypsum, lime, aluminum powder paste, sodium chloride, metakaolin, and citric acid or sodium carbonate; and the substances composing the dry grouting-and-sealing material are required by weight as follows: 6 to 10 parts of the Portland cement, 0.5 to 3 parts of the fly ash, 0.5 to 3 parts of the desulfurized gypsum, 0.2 to 1 part of the lime, 0.0005 to 0.002 part of the aluminum powder paste, 0.05 to 0.15 part of the sodium chloride, 0.2 to 1.5 part of the metakaolin, and 0.0025 to 0.015 part of the citric acid or 0.005 to 0.03 part of the sodium carbonate. The grouting and hole-sealing material used fo drilling of underground coal mine gas provided by the invention has the advantages of adjustable coagulation time, improved air tightness of hole-sealing, improved hole-sealing efficiency and safety, lowered hole-sealing cost, simplified hole-sealing preparation work, etc.

The invention provides a hot-melt welding flux for copper-clad steel grounding net welding, which belongs to the field of metal welding. The prior hot-melt welding flux for copper-clad steel grounding net welding has the problems of violent reaction, huge heat release, high noise, poor corrosion resistance and the like. The hot-melt welding flux consists of hot-melt solder and detonator, wherein the hot-melt solder consists of the following materials in weight percentage: 30 to 40 percent of copper oxide powder, 8 to 11 percent of metal aluminum powder, 20 to 35 percent of metal copper powder, 5 to 10 percent of fluorite powder, 4 to 10 percent of tin powder and 5 to 10 percent of nickel powder. The hot-melt welding flux has the advantages of proper reaction speed, low heat release, low noise, good corrosion resistance and the like.

The invention discloses a phosphate inorganic casting binder suspension curing agent and a preparation method thereof. The preparation method comprises the following steps of: adding organic resin to an alcoholic solvent; stirring to be fully dissolved and adding organic acid; stirring to be fully dissolved and then adding powder magnesia; and evenly stirring and dispersing to prepare the suspension curing agent. The invention also discloses the application of the curing agent to the foundry industry. The preparation method of the phosphate inorganic casting binder suspension curing agent is simple and adopts easily obtained raw materials with lower cost. The curing agent has the excellent performances of high efficiency, suspension rate and solid content, free toxicity, moderate reaction speed with the binder, and the like; a casting sand mould bonded by utilizing the curing of the curing agent and the organic binder has high sintering strength and stable sintering performance without a dust flying phenomenon in a sand-mixing process or generating dust pollution and is easy to popularize and apply in the foundry industry.

The invention discloses a method for preparing iron p-toluenesulfonate and a solution thereof. The method for preparing the iron p-toluenesulfonate includes the steps that (1) a sodium hydroxide solution and an ammonium ferric sulfate solution are prepared; (2) the sodium hydroxide solution is added in the ammonium ferric sulfate solution, the final potential of hydrogen (pH) value of reaction is 7.0 to 9.0, and iron hydroxide precipitation is obtained; (3) the iron hydroxide precipitation is washed, placed in a filter bag and suspended to be dried at room temperature until the iron hydroxide precipitation which is colloid and contains a small amount of water is formed; (4) iron hydroxide which is suspended to be dried is reacted with a p-toluene sulfonic acid to generate an iron p-toluenesulfonate solution; (5) the iron p-toluenesulfonate solution is filtered and concentrated to be viscous, and discharging-cooling and crystallization are performed; and (6) crystals are crushed and dried to obtain the product. The method for preparing the iron p-toluenesulfonate and the solution thereof has the advantages that the activity of the reaction intermediate iron hydroxide is good, the reaction with the p-toluene sulfonic acid is complete, the process is simple, the energy consumption and the cost are low, and the environmental pollution is small.

The invention discloses a method for synthesizing diamide podand extraction agent, wherein chloro-carbonic ester and diglycolic anhydride react to generate mixed anhydride under the action of tertiary amine, and then the reaction is performed with amine to generate the diamide podand extraction agent. The method has mild reaction condition, can be performed at a low temperature, and has high reaction speed and short consumed time; the product purification operation is simple and easy; the obtained diamide podand extraction agent can meet the extraction purity requirement, and is beneficial to establishing flow that the diamide podand is used for treating high-level liquid waste in spent fuel reprocessing plant; the used chloro-carbonic ester is easy to prepare and has a low price, therefore, the cost for preparation of a great amount of extraction agent is greatly reduced; and besides, the yield of the extraction agent is high, so that the method is very suitable for industrial production and application.

The invention discloses a method for preparing amides by metallic sodium-catalyzed ester amination reaction: the reaction is carried out in an autoclave at 90-140°C with ester and liquid ammonia as raw materials and metallic sodium as a catalyst, ester:ammonia=1:1.2 The molar ratio of ~5.0, metal sodium is 4~10% of the molar weight of the ester; when the reaction pressure no longer drops, the reaction is stopped, the unreacted ammonia is recovered, and the obtained reaction product is post-processed to obtain the product. The method can efficiently prepare amides; and the raw materials are cheap, low in toxicity, high in reactivity, less in catalyst consumption, fast in reaction speed, high in reaction conversion rate, and easy to separate products.

The invention relates to a preparation method of polyvinylidene fluoride resin for a solar backboard film. According to the method, an initiator for polymerization is an organic lipoperoxide initiator being low in reaction activation energy, and an adjustor for polymerization is low molecular weight ester with high adjusting efficiency, wherein the concentration of the initiator is 10-30% and the concentration of the adjustor is 5-30%. The continuous feeding manner is adopted, the polymerization condition is mild, the temperature is 64.5-66.5 DEG C, the pressure of a kettle is 2.95-3.15MPa, the end group of a polymerization product is stable and the molecular weight of the polymerization product is controllable in size, and the distribution coefficient is narrow. The obtained polyvinylidene fluoride product cannot be yellowed, is free from big crystal points and can satisfy the demand on technical indexes of the solar backboard film.

In the mixed solvent using non-polar solvent as main component the metal lithium and alpha-methylstyrene or isoprene are reacted to directly prepare bifunctionality anionic oligomer. Its mixed solvent uses arene or paraffine or their mixture as main component, contains ether or amine or both mixture, in which arene and paraffine content is 50-99.9% (valoume) and ether and amine content is 0.1-50%(valume), the conjugated arene and metal lithium are reacted for 1-6 hr. under the condition of -50- -50 deg.C to obtain reactino product, said product is filtered to obtain bifunctionality initiator.

The invention discloses a crosslinked starch reinforced composite shear thickening elastomer, and belongs to the technical field of composite material preparation. The crosslinked starch and the shear thickening glue are compounded to form a macromolecular network structure, so that the problem of cold flow property of the original shear thickening material is solved, meanwhile, the shear thickening material has better machinability, initial elastic modulus and elastic recovery capability; and the overall protection performance can be kept without attenuation in the long-time use process. The shear thickening elastomer prepared by the preparation method disclosed by the invention not only keeps good impact resistance, but also has excellent stability (namely no cold flow property). In the actual application process, the material serves as a core material and is easy to package, and when a plane material is damaged and loses sealing performance, the shear thickening elastomer does not leak like shear thickening glue.

The invention relates to a high-content fomesafen aqueous solution and a preparation method thereof. The preparation method comprises the following steps: adding deionized water into a container, stirring, adding a 97% fomesafen raw medicine, slowly dropping a 99% 2-(2-aminoethoxy) ethanol solution, after dropping is completed, continuously stirring for more than 10 minutes to sufficiently react and neutralize the fomesafen raw medicine with 2-(2-aminoethoxy) ethanol so as to form a transparent solution, finally adding an alkyl glycoside surfactant aid, and uniformly stirring to obtain a fomesafen aqueous solution product.

The invention discloses a preparation method of C.I. pigment brown 25. The preparation method comprises the following steps: (1) preparing a diazo salt liquid of 2,5-dichloroaniline; (2) dissolving 5-(2'-hydroxy-3'-naphthalene-carbamoyl)-2-benzimidazolone in an alkaline water liquid, and adding an acid water liquid to acidify, so as to prepare a suspended coupling liquid; (3) adding the diazo salt liquid into the coupling liquid to carry out a coupling reaction, controlling the pH value of the reacted mixed liquid at 5.5-6.5 by virtue of an alkaline additive in a coupling process, and processing after the coupling so as to obtain a rough pigment; and (4) carrying out pigmentation on the rough pigment to obtain the finished C.I. pigment brown 25. According to the preparation method, coupled components are separated out in a particle manner in an acidification process and are coupled with added diazo components, so that the uniformity of the coupling reaction is guaranteed, and the obtained C.I. pigment brown 25 has the beneficial effects that the particle sizes are uniform, particles are floppy, the dispersibility is excellent, the color is bright, and the coloring strength is high.

The invention relates to a chemiluminescent system and a method which uses the system to determine benzoyl peroxide in flour. The chemiluminescent system is a mixed reaction system of A solution and B solution; the A solution is a luminescent reagent which contains Luminol of 6.0*10<-5> to 2.5*10<3>mol/L, CO3<2-> of 0.20 to 1.00mol/L and OH<-> of 0.08 to 0.20mol/L; the B solution is detected solution which contains Co<2+> of 1.0*10<-8> to 1.0*10<-6>. The method mainly comprises the following steps: mixing A and B with a volume ratio of from 0.8 to 1.2 to 1 in the detection container of a chemiluminescent instrument, and detecting and reading the luminous intensity of the chemiluminescent reaction. The chemiluminescent system has the advantages of high stability, high sensitivity, moderate reaction velocity, anti-interference performance, and excellent selectivity of the detected matter. The method of operation is simple, time-saving and efficient.

The invention is a kind of minim pump droved by magnetism energy, it comprises a base board, a head board and a middle board which is in the middle of the other two boards, so forms four pump cavities, it has entrance and exit; it includes two free surface which are formed in the middle board; the head board has hole connected to outside; there are magnetism energy driving device in the two free surfaces to drive them, the magnetic field formed by fixed current interacts with outer magnetic field, it make the free surface change to make the volume of cavity change periodically.

The invention relates to an aqueous transfer membrane demolding agent as well as a preparation method and application thereof. The aqueous transfer membrane demolding agent consists of the following components in parts by mass: 10-25% of an inorganic strong base, 10-20% of an organic weak base, 8-20% of a main solvent, 5-20% of a cosolvent, 2-5% of a surfactant, 1-15% of a chelating agent and thebalance of water. The aqueous transfer membrane demolding agent provided by the invention has the properties of rapidness and high efficiency, can be repeatedly used for a long time, has no influenceupon a substrate surface, particularly the precision of a sapphire cover plate, and has good application prospects in the precise processing industry.

The invention provides a low-temperature wet cured primer, an anticorrosive composite structure and a method for preparing and constructing the low-temperature wet cured primer. The method comprises the following steps: mixing 20-40 parts by weight of polyaspartic ester resin, 2-10 parts by weight of hexamethylene diisocyanate and 20-40 parts by weight of an organic solvent; reacting at 20-40 DEG C to obtain a secondary amino-terminated prepolymer at the end of the reaction; mixing the obtained secondary amino-terminated prepolymer with 10-20 parts by weight of diphenylmethane diisocyanate; reacting at 5-35 DEG C to obtain the low-temperature wet cured primer at the end of the reaction; coating the low-temperature wet cured primer on a construction base surface; and when the construction base surface is a wet base surface, reacting the low-temperature wet cured primer with moisture on the wet construction base surface to generate an adhesive substance beneficial for adhering the low-temperature wet cured primer to the wet base surface. The low-temperature wet cured primer provided by embodiments of the invention has excellent properties of easily controlled preparation process, strong adhesion force, low-temperature curability and the like.