151results about How to "Mature method" patented technology

The invention discloses a brightly colorful contact lens which is characterized by being prepared by using a method comprising the following steps of: (1) preparing structural color hydrogel with an inverse opal photon crystal structure by using a sequenced colloid nano particle photon crystal structure as a template through a colloid crystal template method; (2) paving the structural color hydrogel with the inverse opal photon crystal structure in a PV (polyvinyl) mould of the contact lens; adding the contact lens standard hot-solid liquid to completely permeate into the network structure ofthe hydrogel; processing the thermal solidification sequence to form the initial film of the contact lens; immersing the initial film of the contact lens in a standard saline water solution to process hydration treatment until swelling is in equilibrium. Compared with other colored contact lenses, the brightly colorful contact lens is beautiful in appearance, good in biological compatibility and good in practicability.

The invention relates to a multi-tunnel assembling-type intelligent ventilation control method of expressway section, which comprises utilizing a continuity character that expressway traffic flow passes through a plurality of tunnels on sections in turn, an antecedence tunnel dopes out traffic flow data and contaminant concentration of a next control periodic time according to actual measured traffic flow and contaminant concentration data, a subsequent tunnel predicts traffic flow data and contaminant concentration of a next control periodic time of the subsequent tunnel according traffic flow of current control cycle of antecedence tunnel and the actual measured traffic flow and contaminant concentration data of the tunnel, and each tunnel controls the starting times of fans according predicted value of contaminant through adopting a model of intelligent fuzzy reasoning. The method can more accurately beforehand predict concentration variation of traffic flow, smog and carbon monoxide in adjacent tunnels, thereby beforehand and accurately controlling starting amount of a jet fan, the control method has excellent ventilation control effect, which can simultaneously reduce energy consumption, and can improve service span of fans.

The invention discloses a preparation method of a novel polycarboxylic acid type water-reducer. The novel polycarboxylic acid type water-reducer is prepared by the following steps: 1) a unsaturated acid monomer and an amine unsaturated monomer react under the action of a chain transfer agent, an initiator and a reducing agent to obtain a copolymer containing an amino group; 2) excessive diisocyanate is dropwise added into methoxy polyethylene glycol to react under the action of a catalyst so as to obtain methoxypolyethylene glycol mono-isocyanate; 3) the copolymer containing the amino group is added into the methoxypolyethylene glycol mono-isocyanate to react and then pH value is adjusted so as to obtain a novel polycarboxylic acid water-reducer. According to the method, product performance is adjusted by controlling molecular structure / molecular weight of the amine copolymer and molecular weight of methoxy polyethylene glycol. Reactions are fast and efficiency is high. In addition, no organic solvent is used; the water-reducer is nontoxic and pollution-free; and operation is simple. The polycarboxylic acid type water-reducer prepared by the method is a functional polycarboxylic acid type high-efficiency water-reducer, and product performance is stable.

The invention discloses a preparation method of an amine-ester slow-setting polycarboxylic acid type water-reducer. The preparation method comprises the following concrete steps: 1) a unsaturated acid monomer and a hydroxyl-containing unsaturated monomer are subjected to a normal temperature oxidation-reduction free radical polymerization reaction under the action of an initiator, a reducing agent and a chain transfer agent to obtain a hydroxyl-containing copolymerization product; 2) excessive diisocyanate is added into methoxypolyethylene glycol to react under the action of a catalyst so as to obtain methoxypolyethylene glycol monoisocyanate; and 3) the hydroxyl-containing copolymerization product obtained in the step 1) is added into the methoxypolyethylene glycol monoisocyanate obtained in the step 2) to react, and then pH value is adjusted by alkali neutralization so as to obtain the amine-ester slow-setting polycarboxylic acid type water-reducer. According to the method, product performance is adjusted by controlling molecular structure / molecular weight of the hydroxyl-containing copolymerization product and molecular weight of methoxy polyethylene glycol / type of diisocyanate. Reaction efficiency is greatly raised, and reaction time is shortened. In addition, no organic solvent is used; the water-reducer is nontoxic and pollution-free; and operation is simple. The product performance is stable.

The invention provides a method for preparing an LED (light emitting diode) and belongs to the field of preparation of a photoelectronic device. The method comprises the following steps of: forming a transition layer consisting of a carbon nano tube and InN or a high In component InGaN epitaxial layer material on a substrate; growing an LED epitaxial wafer on the transition layer; carrying out photoetching, etching, electrode deposition and packaging process on the LED epitaxial wafer to prepare the LED with a positively assembled structure; or transferring the substrate, carrying out laser stripping and separation on the substrate and then carrying out photoetching, etching, electrode deposition and packaging process to prepare the LED with a vertical structure. According to the method, the crystal quality can be improved, but also the stress regulation and control can be realized.

The invention relates to coated glass with blue-light cutoff and visible light anti-reflexion dual functions and a preparation method therefor. According to the coated glass, a film layer structure consists of a blue-light cutoff film, glass and anti-reflection film sequentially, and coating is carried out by adopting a magnetron sputtering method; the transmittance is increased by 1.5% to 5.5% compared with that of uncoated sheet glass in the spectrum wavelength range of 380nm to 780nm; the blue-light cutoff rate is increased by 40% to 75%, and the ultraviolet ray cutoff rate is 100%; the pencil hardness of a film layer is 8.0H; the obtained coated glass can be applied to the fields of electronic display panels, mobile phone encapsulation glass cover plates, LED (Light Emitting Diode) lighting lampshades, show windows, eyeglass frames, locomotive and steamboat window glass and the like; and through observing through observation window glass, images are free from glare and are clearer, the fatigue of human eyes is reduced, and the injury to the human eyes is prevented.

The invention discloses a battery screen printing quality detecting method based on block template matching. Original images of batteries are acquired to build a template data set; images of the batteries are corrected; the corrected images of the batteries are tailored; detecting areas are extracted to reduce information redundancy; battery screen printing images are cut from battery backgrounds;a battery screen printing position is determined; block matching is performed on images to be detected by using block template images in the template data set to judge the matching degree between images of the batteries to be detected and templates; block sub images of the batteries to be detected are compared with built template sub images one by one; difference results are analyzed to obtain battery screen printing defect information; aberration quantitative analysis is performed on each sub image to obtain aberration conditions of each part in global images; and meanwhile, average processing is performed to observe global aberration conditions to finish the battery screen printing quality detection. The method needs no manual intervention, and can realize quick high-precision battery screen printing quality detection.

A novel totally chlorine-free bamboo-pulp bleaching process is provided. The invention relates to a novel totally chlorine free (TCF) bamboo-pulp bleaching process, is a new bionic bleaching technology for paper pulp. The invention essentially comprises the following procedures: (1) Synthesizing enzyme-imitated metal salen, using Schiff base salen to react with metallic organic acid salt to synthesize metal salen; (2) Pre-treatment bleaching bamboo pulp, carrying out bleaching pre-treatment on the oxygen delignification sulfate bamboo pulp with metal salen, NaOH, H2O2 and O2 existing; (3) Subsequent TCF bleaching, carrying out three bleaching treatments, namely, alkaline treating enhanced by hydrogen peroxide, bleaching by peroxy acid and bleaching by hydrogen peroxide the bamboo pulp pre-treated by enzyme-imitated metal salen. For the invention, the source is wide, the metal salen is easy to synthesize, the yield rate is high, the cost is low, the consumption is very low; the metal salen is easy to store, has no demanding requirement on the environment, can obviously improve the whiteness of paper pulp, reduce the load of waste water pollution in bleaching, and saves the use of bleaching chemicals.

The invention discloses a preparing method for polycarboxylate-type anti-mud water reducer with a modified side chain terminal group. The preparing method includes the steps that azido-terminated polycarboxylate-type water reducer is prepared first, and then the azido-terminated polycarboxylate-type water reducer and an alkyne-terminated benzene-pyridine derivative are subjected to a click chemical reaction to prepare the polycarboxylate-type anti-mud water reducer with the side chain terminal group being the alkyne-terminated benzene-pyridine derivative. As the terminal hydroxyl group of the polycarboxylate-type water reducer is modified into a five-membered ring and a benzene / pyridine ring, the physical size of the side chain terminal of the polycarboxylate-type water reducer is greatly increased, and the polycarboxylate-type water reducer is not prone to be inserted into a layered structure of clay to achieve the anti-mud effect without affecting the inherent functions. The technical problems that as a side chain of existing polycarboxylate-type water reducer is prone to be inserted into the layered structure of the clay, the polycarboxylate-type water reducer is lost fast, and then the work performance of concrete is lowered are solved.

The invention relates to a preparation method for coating decorative glass with a crack coating. A pattern is printed on the glass in a screen printing mode. A crack or interspace pattern is generated in the pattern, and then metal or high reflection inorganic oxide is plated in a crack or interspace through a physical method to fill the crack or interspace. The preparation method for the coating decorative glass with the crack coating combines screen printing ink pattern printing with physical method coating, so that the printed decorative glass not only has colors of ink, but also has a metal shiny pattern embedded in the ink or a unique pattern of a high reflection inorganic oxide film. The coating decorative glass with the crack coating is widely applied to the decorative glass using fields of household appliances, home furnishing, construction and the like.

The invention relates to a preparation method of ambroxol hydrochloride. The preparation method comprises the steps of: directly obtaining a compound in formula (2) from simple intermediate 1,3-cyclohexadiene under the catalysis of palladium acetate, reacting with a compound in formula (3) to obtain a compound in formula (4), hydrolyzing the compound in the formula (4) in the presence of potassium carbonate, reducing by sodium borohydride, and carrying out salt forming with hydrochloric acid to obtain ambroxol hydrochloride. Therefore, synthesis of key intermediate trans-4-amino cyclohexanol in a common process is avoided and the separation of racemic products is avoided. The method is simple and feasible in operation, mild in conditions, mature in process and high in product yield and purity, and is suitable for industrialized mass production.

The invention provides carboxyl-containing high-refractive-index hyperbranched polyesteramide and a preparation method thereof, as well as application of the carboxyl-containing high-refractive-index hyperbranched polyesteramide to plastic modification, and belongs to the field of hyperbranched polymers. The reaction period can be shortened, the production process can be simplified, the cost can be reduced, and industrial large-scale production can be met. The preparation method comprises the following steps: adding an aromatic polycarboxylic / multi-anhydride monomer and a single amino and single hydroxyl monomer into a reactor, adding a catalyst into the reactor, and performing prepolymerization reaction under the protection of inert gas at the temperature of 80 to 180 DEG C for 0.5 to 48 hours to form a polymeric monomer; and then heating to 120 to 250 DEG C, performing reaction for 0.5 to 120 hours to obtain the carboxyl-containing high-refractive-index hyperbranched polyesteramide. The preparation method provided by the invention can be applied to the industrial production process of the carboxyl-containing high-refractive-index hyperbranched polyesteramide; the prepared carboxyl-containing high-refractive-index hyperbranched polyesteramide can resist the temperature higher than 350 DEG C and is relatively high in refractive index; as an improving agent, the carboxyl-containing high-refractive-index hyperbranched polyesteramide is applied to a plastic system; the mechanical property can be improved without affecting the transparency of the plastic system.

The invention relates to a runoff data free region confluence calculation method. The method comprises the steps of collecting finished river basins which have history rainfall runoff data, wherein the unit line confluence prediction effects of the river basins are relatively good, and storing confluence schemes and river basin geographic information in advance; when flood confluence calculation of runoff data free river basins is carried out, establishing number-time distribution curves for the net rainfall drop number of grids in data river basins and data-free river basins, carrying out generalization by employing triangles, carrying out similarity calculation on generalized triangle processes, thereby searching similar river basin sets, carrying out time-space conversion on unit line processes of the similar river basin sets, and synthesizing converted unit line sets according to the most unfavorable principle with high peaks and short time, thereby obtaining the unit lines of the runoff data free river basins. According to the method, on the basis of accumulating a great deal of river basin prediction, similar river basin selection, and time-space conversion and synthesis of the unit lines are carried out by employing targeted criteria, artificial subjective judgment errors can be effectively avoided, the efficiency is improved, and the foundation is laid for prediction of the wide-range data free regions.

The invention relates to the field of image segmentation, in particular to a cell separation method. The cell separation method comprises the following steps: A, pre-segmenting a cell image by an OSTU method; B, performing hole filling on the pre-segmented image by a boundary tracking method; C, performing watershed segmentation on the image subjected to hole filling; and d, combining 'over-segmentation' regions of the segmented image and re-segmenting 'incomplete segmentation' regions. Compared with the conventional segmentation algorithm synthesizing concave point analysis and boundary detection and the conventional segmentation algorithm based on mathematical morphology, the cell separation method is clear in thinking and easy to implement in codes, so that the cell separation method is easy to implement. Compared with the traditional method, the cell separation method can obviously reduce the over-segmentation conditions.

The invention provides an optical system for a miniaturization high-precision star sensor. According to the invention, a quasi-gauss lens structure is adopted and formed by 6 lenses; all the lenses are spherical lenses; and the glass of the first lens is made of fused quartz materials so that the first lens can be immediately used for correcting image difference and can be used as protection glass of the optical system. According to the optical system is characterized by wide spectrum, large view side and large relative aperture and has quite small distortion quantity in a quite wide spectrum range and view field; the concentration degree of confusion disc energy of each view field is uniformly distributed; the imaging quality is good; the system can work at a temperature from -50 DEG C to +70 DEG C and has good image quality and defocusing amount; and posture measurement of high-precision star sensor working in severe space and temperature can be met.

The invention provides a preparation method of a chitosan-protocatechuic acid graft copolymer film. The preparation method comprises the following steps: using chitosan and protocatechuic acid molecules as reaction substrates, using EDC / NHS as a crosslinking agent, synthesizing a chitosan-protocatechuic acid graft copolymer, and performing freeze drying to prepare a film forming solution with the proper concentration; removing bubbles, drying, soaking till the film forming solution is neutral, and performing film uncovering to finally obtain the chitosan-protocatechuic acid graft copolymer film. The preparation method is low in investment, and is suitable for use in large-scale production. The chitosan-protocatechuic acid graft copolymer film prepared by the preparation method is significantly improved in mechanical properties and physical and chemical properties, is low in water content, good in water resistance, low in transparency and high in tensile strength, has relatively high antioxidant activity, provides a very good way for artificially synthesizing a novel food fresh-keeping film, widens the application range of a chitosan film in food storage and food fresh keeping, improves the value of chitosan, and improves economic benefits of a food processing enterprise.

The invention relates to a method for synthesizing caproic acid by catalyzing lactic acid through microorganisms. According to the method, specific functional florae are adopted to biologically synthesize caproic acid from lactic acid in a culture liquid or wastewater. By adopting the method that lactic acid is adopted as the electron donor for producing caproic acid, the efficiency is increased by more than 20% when being compared with that of a conventional method that ethanol is adopted as an electron donor for producing caproic acid, the toxicity resistance concentration of the caproic acid functional bacterium to metabolites (caproic acid) is increased by more than 2 times when being compared with that of reported caproic acid bacteria, and the caproic acid functional bacterium has the characteristics of high conversion rate and high stress resistance. When the lactic acid as a non-fuel substance which is easy to obtain is converted into caproic acid, the conversion efficiency is high, and the high industrial practicability is achieved.

The invention discloses a preparation method for a reinforced low-resilience and low-alkaline liquid concrete accelerator. The accelerator comprises material components with mass percentages as follows: 30-54% of liquid modified sodium aluminate, 0.8-5% of modified alcohol-amine organic micromolecules,0.1-0.3% of polyacrylamide and the balance of water; firstly, modified alcohol-amine organic micromolecules are prepared and then dropwise added into modified sodium aluminate solution, water is added under stirring, then polyacrylamide is added under stirring, and the reinforced low-resilience and low-alkaline liquid concrete accelerator is prepared. The method has the advantages that the preparation cost is low, the process is simple, and the prepared concrete accelerator has good stability suitable for concrete wet-spraying process and has the advantages of low admixture amount, low resilience ratio, short condensation time, low alkali content, good adaptability to cement, no adverse effect on concrete performance, and the like.

The invention provides a polyether sulfone porous membrane for a membrane distillation process and a preparation method of the polyether sulfone porous membrane, wherein before the polyether sulfone porous membrane for the membrane distillation process is prepared, no hydrophobic modification treatment on polyether sulfone body material is carried out, and no hydrophobic modification treatment on the membrane is carried out after membrane is prepared. The preparation method comprises the following steps: firstly preparing a wet polyether sulfone porous membrane by a lyotropic phase transformation method, and then drying the wet membrane so as to prepare the polyether sulfone porous membrane for the membrane distillation process. The polyether sulfone porous membrane provided by the invention has the advantages that membrane distillation flux is stable and high, the preparation method is mature and simple, the cost is low, the amplification is easy, and the application prospects in the fields such as desalination of seawater and bitter saline water, concentration of biological macromolecular solution and concentration of sugar-containing liquid are broad.

The invention discloses a phthalonitrile monomer containing aromatic polyamide, which is characterized in that a structural formula of the monomer is shown in the description, wherein R1, R2 and R3 are groups shown in the description or H atoms, which can be identical or can be different, and at least one substituent group of the R1, R2 and R3 contains an amide group, and a carbonyl C=0 characteristic peak displayed through an infrared spectrogram of the monomer is between 1650 and 1660. The invention also discloses a preparation method of the monomer and prepared poly phthalonitrile resin by using the monomer. The phthalonitrile is a monomer having an autoacceleration thermal polymerization behavior, during solidification of the phthalonitrile, no arylamine or phenolic curing agent is required to be added, the cost is saved, the operation is simplified, the quality can be controlled easily, besides, defects of a traditional phthalonitrile resin two-component system that the blending process is complex, the energy consumption is high and the like are avoided, and industrial production is facilitated. The method is simple, mature, easy to operate and control, and convenient for application.

The invention provides a coated glass with dual functions of highly reflecting visible light and blocking infrared rays and a preparation method thereof. The coated glass comprises near-middle infrared ray reflecting glass and a visible light reflection increasing layer arranged on the surface of the near-middle infrared ray reflecting glass. The near-middle infrared ray reflecting glass is a float FTO glass substrate; or the near-middle infrared ray reflecting glass comprises a glass substrate, an isolation layer, and a transparent conductive semiconductor layer, wherein the isolation layer and the transparent conductive semiconductor layer are sequentially arranged on the surface of the glass substrate, the isolation layer is a SiOx membrane layer, and the transparent conductive semiconductor layer is any one of ITO, ATO, AZO, GZO, and ZnO-SiO2 membrane layers. The visible light reflection increasing layer comprises SiOx membrane layers and high refractive index medium membrane layers which are alternately arranged. The high refractive index medium membrane layers comprise titanium dioxide, niobium pentoxide, zirconium dioxide, tin dioxide, zinc oxide, or a silicon nitride film. The obtained coated glass can block infrared rays, has a high reflectivity of visible light, and can prevent outdoor heat from entering the interior of window through the glass.

The invention discloses a thermal storage and heat preservation finishing method. The method comprises drying and processing after soaking-padding finishing fabric by a solution containing thermal storage and heat preservation combination. The thermal storage and heat preservation combination comprises an anion far infrared finishing agent, a negative oxygen finishing agent and a cross-linking agent. The anion far infrared finishing agent is an anion nanoparticle high emulsification solution, the negative oxygen finishing agent is nano-anion powder and the cross-linking agent is an aziridine cross-linking agent. The method can endow thermal storage and heat preservation functions to the fabric, can be realized only by padding and baking by common equipment of a printing and dyeing enterprise, and has the advantages of simple equipment, short flow, low cost, mature method, low technical requirement and high yield.

The invention provides a liquid crystal polyester resin complex with low dielectric constant. The liquid crystal polyester resin complex is prepared from components in parts by weight as follows: 60-90 parts of liquid crystal polyester resin, 1-10 parts of an additive and 10-40 parts of filler, wherein the liquid crystal polyester resin adopts wholly aromatic liquid crystal polyester resin which is formed by polymerizing reaction monomers, and the reaction monomers comprise at least one of free aromatic diamine and aromatic hydroxylamine, aromatic hydroxycarboxylic acid or aromatic aminocarboxylic acid, aromatic glycol and aromatic dicarboxylic acid; the additive adopts UHMWPE (ultra-high-molecular-weight polyethylene), and the number-average molecular weight of the UHMWPE is 1.15-5.9 million.

The invention discloses novel high-strength foam concrete and a preparation method for the same. The novel high-strength foam concrete is characterized in that the novel high-strength foam concrete is prepared from the following raw materials in parts by weight: 300 to 800 parts of a gel material, 250 to 850 parts of a fine aggregate, 375 to 1,250 parts of a coarse aggregate, 4 to 8 parts of a water reducing agent, 250 to 850 parts of water, 20 to 40 parts of a foaming agent and 10 to 20 parts of a foam stabilizer, wherein the foaming agent is an isocyanate derivative. According to the novel high-strength foam concrete and the preparation method for the same, the following principle is utilized: isocyanate adopted as the foaming agent is reacted with the water to generate unstable carbamic acid at first, the unstable carbamic acid is rapidly decomposed into amine and carbon dioxide, and the discharged carbon dioxide acts for foaming to generate a foam body; a prepared foam concrete material is favorable for making a heat insulation, soundproof and high-strength foam concrete building block on one hand, and on the other hand, the construction engineering cost is reduced, and the high-strength foam concrete can be widely applied to construction engineering.

The invention discloses a preparation method of a zinc oxide quantum dot negative electrode material coated with multilevel structure carbon. The method comprises the following steps: firstly, a phenyl / pyridyl carboxylic acid compound and zinc salt are weighed at a mole ratio, and a coordination polymer of zinc and carboxylic acid is prepared by utilizing a hydrothermal / solvothermal method under the conditions that the pH value is 5-11, the temperature ranges from 80 DEG C to 180 DEG C, and the reaction time is 5-36h; secondly, the prepared polymer is calcined for 30min-120min at 400 DEG C to 800 DEG C in an inert atmosphere, so that the zinc oxide quantum dot (2-100nm) negative electrode material coated with multilevel structure carbon is prepared. The zinc oxide material prepared by the method has the following advantages: (1) the precursor purity is high, and the zinc oxide negative electrode material with high purity and high performance can be obtained after calcination; (2) a multilevel carbon structure array can play a role of'fixing frame' for zinc oxide, reduce the volume effect in a charge-discharge cycle process, improve the structure stability of zinc oxide, and further improve the electronic conductivity of zinc oxide, so as to improve the battery cycle performance.

The invention relates to a preparation method of a Mao cigarette extract, specifically comprising the steps that Shifang County Mao cigarette as a raw material is smashed and is subjected to subcritical extraction, chromatographic column separation and vacuum concentration to prepare the Mao cigarette extract. The invention also relates to application of the Mao cigarette extract to a cigarette filter stick, specifically comprising the steps that the Mao cigarette extract is diluted by using an ethanol and propylene glycol mixed solvent, and then is mixed with glycerol triacetate according to a certain ratio, so as to prepare a Mao cigarette type plasticizer, and afterwards the cigarette filter stick is prepared according to a conventional filter stick process. Through the application of the Mao cigarette type plasticizer, a cigarette has a peculiar sun-cured tobacco taste in smoke, a sour and sweet feeling is added, the agreeable aftertaste is more mellow, the enjoyment and richness of the smoke are enhanced, and the smoking quality is obviously improved.

The invention discloses a preparation method of a slump-retaining polycarboxylic acid type water-reducer. The preparation method comprises the following steps: 1) a hydroxyl-containing unsaturated monomer, an amine unsaturated monomer, an initiator, a reducing agent and a chain transfer agent are subjected to an oxidation-reduction free radical polymerization reaction to obtain a copolymerization product containing an amino group; 2) excessive sodium hydride is added into methoxypolyethylene glycol to react, epoxy chloropropane is added after the reaction, and desalination is carried out after stirring and reacting so as to obtain epoxy methoxy polyethylene glycol; 3) the copolymerization product containing an amino group is added into the epoxy methoxy polyethylene glycol to react, and pH value is adjusted by alkaline neutralization after the reaction so as to prepare the slump-retaining polycarboxylic acid type water-reducer. According to the method, product performance is adjusted by controlling molecular structure / molecular weight of the copolymerization product containing an amino group and molecular weight of methoxy polyethylene glycol. Reaction is fast and efficiency is high. In addition, no organic solvent is used; the water-reducer is nontoxic and pollution-free; and operation is simple. The prepared polycarboxylic acid type water-reducer is a slump-retaining polycarboxylic acid type water-reducer, has stable product performance and especially has a good slump-retaining effect on a mud sandy stone material.

The invention discloses a preparation method of a super-high-dispersion polycarboxylate-type efficient water reducing agent. The preparation method includes the specific steps that firstly a terminal amino-based copolymerization product is prepared, then a terminal halogen-based unsaturated copolymerization product is prepared, finally the obtained terminal halogen-based unsaturated copolymerization product, an unsaturated ester monomer B, a transition metal compound and a ligand react at the temperature of 50-80 DEG C, and the super-high-dispersion polycarboxylate water reducing agent is obtained. Product performance is adjusted by controlling the molecular structure and the molecular weight on a main chain / side chain of the water reducing agent, the reaction speed is high, efficiency is high, the water reducing agent is free of toxin and pollution, and operation is simple. The prepared polycarboxylate-type water reducing agent is the super-high-dispersion polycarboxylate-type efficient water reducing agent and is stable in product performance and low in cost and particularly has an excellent slump retaining effect on stones containing mud and sand.

The invention provides a liquid crystal polyester resin complex with low dielectric constant. The liquid crystal polyester resin complex is prepared from components in parts by weight as follows: 60-90 parts of liquid crystal polyester resin, 1-10 parts of an additive and 10-40 parts of filler, wherein the liquid crystal polyester resin adopts wholly aromatic liquid crystal polyester resin which is formed by polymerizing reaction monomers, and the reaction monomers comprise at least one of free aromatic diamine and aromatic hydroxylamine, aromatic hydroxycarboxylic acid or aromatic aminocarboxylic acid, aromatic glycol and aromatic dicarboxylic acid; the additive adopts UHMWPE (ultra-high-molecular-weight polyethylene), and the number-average molecular weight of the UHMWPE is 1.15-5.9 million.