237results about How to "Viscosity is easy to control" patented technology

The invention relates to a method for preparing high boiling silicone oil by using organic silicon high boiling substances, comprising hydrolyzation of alcohol and neutralization, wherein the organic silicon high boiling substances are hydrolyzed in the mixed liquid of alcohol and water and refluxed for 1-4 hours; nitrogen purging is carried out on the reactant, and then the reactant is added with hydrogen chloride dissolved in urea, zinc oxide and ammonium bicarbonate and in the system thereof. The invention integrally uses the organic silicon high boiling substances and lowers the chlorine content in silicon oil products, ensures the molecular weight and viscosity to be controllable and mass to be more stable; the usage of the neutralizing agent and latent solvent is reduced greatly, thus reducing the production cost; the process is simple and the industrial production is easy.

The invention relates to the field of a high-frequency copper-clad plate of a polytetrafluoroethylene (PTFE) dielectric substrate, and in particular relates to a preparation method of a polytetrafluoroethylene (PTFE) composite dielectric substrate used for a microwave circuit. The method comprises the steps of firstly, mixing fluororesin emulsion, inorganic filler and a thickening agent to prepare stable and uniform dispersion liquid; after that, enabling a release type base material to be coated with the dispersion liquid, and then baking; after baking, carrying out release type separation on a resin layer and the base material; cutting and overlapping the separated resin layer according to the thickness and the size of the substrate; covering the two sides of the resin layer with copper foils, and carrying out high-temperature lamination sintering to obtain the PTFE composite dielectric substrate covered by the copper foils at the double sides. After the preparation method is used, the formation of a hole in the composite dielectric substrate and the residue of an organic auxiliary agent are effectively reduced; the preparation method has the advantages of being simple and convenient in technology, beneficial to large scale production, etc.

A composite radius filler for use in an aircraft structure. The aircraft structure includes structural composite parts assembled together to form the aircraft structure. The composite radius filler is arranged between rounded sections of the structural composite parts for filling a gap formed between the structural composite parts. The composite radius filler is made structural by a nanostructure arranged within the composite radius filler for the reinforcement of the interface between the radius filler and the structural composite part. A method for producing an aircraft structure including a nano-reinforced radius filler.

The embodiment of the invention discloses a silicon heterojunction solar cell with an electroplating electrode and a manufacturing method thereof. The method comprises the steps that a metal seed layer is formed on the surface, where a grid needs to be manufactured, of a cell substrate; a silk-screen printing ink process is used for forming an ink grid line groove pattern on the surface of the metal seed layer; after a preset time interval, the ink grid line groove pattern is cured; the ink grid line groove pattern is used as a mask film, an electroplating process is used for depositing a composite metal layer; the ink grid line groove pattern and the part, which is not in contact with the composite metal layer, of the metal seed layer is removed. The implementation mode for forming the ink grid line groove pattern by the silk-screen printing ink process is simple and controllable, moreover, ink can be removed easily, and the manufacturing technology is simple. In the curing process, the ink can be evenly expanded and deformed, the width of an opening of the obtained ink grid line groove pattern is small, the depth-width ratio of a formed metal grid line is large, the light shading area is small, and the efficiency of the silicon heterojunction solar cell with the electroplating electrode is improved.

The invention provides a high-performance silicon-based heat conducting paste, which comprises, by weight, 5%-20% of substrate, more than 1%-10% of viscosity modifier and the balance being heat conducting filler. By means of adding viscosity modifier, the designed controlling requirements on viscosity of heat conducting paste can be met, stability of the powdered heat conducting filler in a heat conducting paste system is improved, and the obtained heat conducting paste is excellent in performance.

The invention discloses a novel high-strength HDPE (High-Density Polyethylene) composite tube, which is obtained by composting an HDPE core tube, and a modified PE (Poly Ethylene) layer, wherein the innermost layer is the HDPE core tube which is enwrapped by a PE bonding layer, and the modified PE layer enwraps the PE bonding layer. The composite tube disclosed by the invention has the characteristics of good shock resistance, high compression strength, high wear resistance and the like. The HDPE core tube is corrosion resistant so that the composite tube is long in service life and capable of resisting the invasion by various corrosive media, such as an acid, an alkali and a salt, the modified PE layer is adopted so that plastic oxidative degradation is inhibited, tube ultra-violet resistance performance is improved, and tube service life is prolonged, and the PE bonding layer adopts a thermoplastic elastic body so that material performance is greatly improved, bonding capacity between the core tube and the modified PE layer is improved, and service life can reach 60 years.

The invention discloses a production process for a directly-spun terylene industrial filament of a liquid-phase tackifying fusant, belonging to the technical field of spinning. The production process includes the following steps: esterification, polycondensation, liquid-phase tackification and spinning. The production process is characterized in that: in a vertical reaction kettle, liquid-phase tackfication is carried out on the fusant obtained through esterification and polycondensation of glycol and phthalic acid; the vertical reaction kettle adopts a tower type film forming structure; the fusant enters the vertical reaction kettle from the top part for distribution, and the film forming is naturally finished under the action of gravity; a backflow pipeline is provided for the discharging of the reaction kettle, the viscosity and flow rate of the fusant are controlled by the backflow adjusting, the intrinsic viscosity of the polyester fusant after being tackified in a liquid-phase manner is within 0.85 to 1.0dl/g, and the fusant is conveyed to a spinning box body by a gear pump for spinning. By reasonably designing the reaction kettle and allocating the process, the invention effectively solves the consistency between the fusant reacting condition and the staying time; meanwhile, the consumption of a public medium is reduced, and the cost is lowered; by optimizing the process, the invention increases the production efficiency of a system and improves the product quality.

The invention discloses organophosphorus copolymeric flame-retarded polyamide and a preparation method thereof. The preparation method particularly comprises the following steps that 1 an organophosphorus flame-retarded monomer reacts with a diamine monomer, and salt is prepared; 2, diacid, diamine and/or binary amide salt, lactam, the salt prepared in the step 1, an antioxidant, a catalyst and deionized water are added into a reaction kettle, and the needed organophosphorus copolymeric flame-retarded polyamide material is prepared in situ in a nitrogen atmosphere by regulating and controlling the reaction temperature and pressure. According to the organophosphorus polyamide material prepared through the method, a little amount of reaction flame retardant is added, a synergistic flame retardant does not need to be added, the viscosity is controllable in the preparation process, and the obtained product is excellent in mechanical property and outstanding in flame retardance. Meanwhile, the preparation method has the advantages that the technology is environmentally friendly and simple, the cost is low, and operation is easy to learn.

A matrix for Chinese-medicinal plaster is prepared from polyisobutylene, viscosity increaser, softening agent, filler, percutaneous absorption promoter, and solvent. Its advantages are low hypersensitivity and irritation to skin, and controllable viscosity. Its Chinese-medicinal plaster is prepared through proportionally mixing said matrix with the Chinese-medicinal extract.

The invention discloses an atmosphere protection type chalcogenide glass optical fiber tapering device and a use method.The device comprises an optical platform, two electric displacement platforms, two optical fiber clamps, a seamed quartz tube and an atmosphere protection tube type resistance furnace.Firstly, the seamed quartz tube filled with a chalcogenide glass optical fiber penetrates through the atmosphere protection tube type resistance furnace and is clamped and fixed through a diaphragm; then the two ends of the optical fiber are fixed to the electric displacement platforms through the optical fiber clamps, inert gas is introduced into the furnace, the optical fiber is softened after being heated, and the electric displacement platforms are started for two-way traction tapering; finally ultraviolet curing glue is injected into the two ends of the seamed quartz tube for fixing the tapered optical fiber in situ.The device can taper the optical fiber under inert atmosphere protection, and oxidation of the surface of the optical fiber is effectively avoided; the temperature control effect on the periphery of the optical fiber is good, and the tapering success rate is high; in-situ fixing or packaging of the tapered optical fiber can be achieved; operation is simple, cost is low, and efficiency is high.

The invention relates to a high solidness low viscosity nano composite polyester resin and method of preparation, wherein silicon dioxide colloidal having a grain diameter of 10-150 with hydroxyl on the surface is mixed with polyhydric alcohols and dicarboxylic acids to synthesize nano silica dioxide composite polyester resin with a molecular weight of 1000-5000, hydroxyl value 80-200mgKOH/g, solid content greater than 95wt%, viscosity being 800-2000mPs.s through molten in-situ polymerization method, the content of the nano silicon dioxide is 1-15wt% of the nano silicon dioxide composite polyester resin.

The invention discloses in-situ polymerization type N-P synergistic flame-retardant nylon and a preparation method thereof. The preparation method provided by the invention particularly comprises the following steps: (A) carrying out a reaction between organic phosphorus flame-retardant monomers and diamine monomers to form salt; (B) emulsifying a nitrogen flame retardant and dispersing to obtain nitrogen flame retardant emulsion; (C) adding diacid and diamine or binary amide salt or a solution thereof, the prepared salt or a solution thereof, the nitrogen flame retardant emulsion, an antioxidant and a catalyst into a reaction kettle, and performing in-situ polymerization under the inert atmosphere by regulating and controlling reaction temperature and pressure intensity to prepare the required N-P synergistic flame-retardant nylon. The N-P synergistic flame-retardant nylon prepared by the method reduces the total amount of the required added flame retardant due to the synergistic effect. The viscosity can be controlled in the whole preparation process, a product with excellent mechanical property and flame retardance can be obtained, the vertical combustion test can reach UL-94 V-0 level, and the limit oxygen index is 28 percent or higher.

The invention relates to a biodegradable bonding agent material prepared from LA (lactide) chemical synthesis products. The LA materials are poured into a reaction container containing solvents according to the proportion of 5 to 50 percent of the mass of the solvents; a reactor has a stirring and control function; the reactor is controlled under the nitrogen gas protection condition; a certain reaction temperature is controlled; meanwhile, the stirring is performed; after the LA is completely fused, catalysts are added; after reacting for a period of time, stirring is stopped; after the materials are taken out, extraction and centrifugation are performed, so that the LA chemical synthesis products are obtained; then, the LA chemical synthesis products are dissolved by acetic ester, so that the biodegradable bonding agent is obtained. The bonding agent has the characteristics that the preparation is simple; the relative molecular weight and the viscosity are controllable; the biodegradable performance is realized. The biodegradable bonding agent material can be used in the fields of adhesive tapes, leather, sticking paper, stationery, office, electronics, automobile edge trimming fixation, shoe industry, handwork ornament pasting and fixation and the like.

The invention belongs to the technical field of glass profiling, particularly discloses a glass profiling device and a glass profiling method, and aims at solving the problem how to improve the continuity of linking of various procedures in the glass profiling process. The glass profiling device comprises a rotation mechanism, a lower die component, an upper die component, a receiving work station, a profiling work station, a cooling work station and a removing work station; the rotation mechanism comprises a rotation large disc and a turntable drive device; the lower die component is arrangedon the upper surface of the rotation large disc and can rotate to the receiving work station, the profiling work station, the cooling work station and the removing work station respectively along with the rotation large disc; the upper die component is arranged at the profiling work station and on the upper side of the lower die component. The glass profiling method adopts the glass profiling device to profile glasses. The lower die component enters various work stations respectively under the driven of the rotation mechanism to sequentially finish various procedures required for glass profiling, so that the continuity of linking of various procedures is better, and improvement on the quality and the yield of a glass product is facilitated.

The invention discloses an in-situ polymerization type N-P synergistic flame-retardant nylon and a preparation method thereof. The preparation method comprises the following steps: (1) reacting an organophosphorus flame-retardant monomer with a diamine monomer to form salt; (2) emulsifying and dispersing a nitrogen flame retardant, so as to obtain a nitrogen flame retardant emulsion; and (3) adding a lactam monomer, the salt prepared in the step (1), an antioxidant, the nitrogen flame retardant, a catalyst and a molecular weight adjusting agent into a reaction kettle, and performing in-situ polymerization by regulating reaction temperature and pressure under inert atmosphere, so as to obtain the needed N-P synergistic flame-retardant nylon material. According to the prepared in-situ polymerization type flame-retardant nylon, the content of the flame retardant needing to be added is reduced due to the synergistic effect, the viscosity during the whole preparation process is controllable, the product with both excellent mechanical performance and flame-retardant performance can be obtained, the vertical burning test can achieve the UL94 V-0 grade, and the limiting oxygen index is more than 28%.

The invention provides a photocurable polyester oligomer for 3D printing as well as a preparation method and application thereof. The preparation method comprises the following steps of: carrying outvacuum heating dehydration on an aliphatic hydroxyl acid monomer to prepare a polyester prepolymer, adding an initiator in the presence of polyol to prepare a hydroxyl-terminated prepolymer by a meltcopolymerization method, and finally adding acrylic acid anhydride to prepare the photocurable aliphatic polyester oligomer. The prepared photocurable aliphatic polyester oligomer can be directly combined with a photoinitiator, and is suitable for DLP type 3D printing. The photocurable aliphatic polyester resin material prepared by the method is high in purity, relatively low and adjustable in viscosity, can be used in the biomedical field, especially in the fields of drug sustained release, tissue engineering, bone fixation, repair materials and the like, a photocuring polyester degradation material is combined with a 3D printing technology, the printed material is non-toxic and has excellent biocompatibility and mechanical properties, the degradation rate is between 6 months and 36 months, and a new direction is provided for application of 3D printing.

The invention discloses a preparation method of proton exchange membrane fuel cell catalyst layer slurry, the catalyst slurry components include a catalyst, a conductive polymer and a solvent, the catalyst slurry viscosity is 100-1000 mPa.s, and the solid content is 10 to 50 wt%. By controlling the final viscosity and the solid content of the slurry, the slurry form and catalyst layer preparation efficiency and effect can be ensured. A catalytic layer electrode prepared from the slurry can be used for assembly of a proton exchange membrane fuel cell membrane electrode (MEA Membrane Electrode Assemble) and the pore size distribution is more conducive to the gas-liquid mass transfer, and is conducive to the improvement of the performance and stability of the battery in a high current density range.

The invention discloses polyolefin lithium battery diaphragm coating slurry, which is prepared by a coating material, a binder and deionized water, wherein the coating material is composed of one or more of graphene coated Al2O3 powder, carbon nanotubes, graphene and graphite according to any proportion; the binder is composed of one or two of sodium alginate, carboxymethylcellulose sodium, styrene butadiene rubber and polyvinylidene fluoride according to any proportion; the mass ratio of the coating material and the binder is 10:(0.01-1), the balance is the deionized water, and the mass fraction of the coating material in the polyolefin lithium battery diaphragm coating slurry is 0.1-30%. The invention further discloses a method of coating a polyolefin lithium battery diaphragm by using the polyolefin lithium battery diaphragm coating slurry. The coating slurry takes water as a solvent, and has the advantages of low cost, environment friendliness, controllable viscosity of the coatingslurry and good wettability and dispersion of the coating slurry. The method of the invention is simple in preparation process, low in cost and suitable for large-scale production.

A process for preparing a soluble high molecular-weight chitosan which comprises treating chitosan, water, alcohol, acid mixture with supercritical fluid to prepare a modified chitosan with high aqueous solubility.

The invention discloses a fire retardant coating of a super thin steel structure and a preparation method thereof. The fire retardant coating is prepared from the following raw materials in parts by weight: 30 to 40 parts of amino resin, 10 to 20 parts of megilp, 20 to 30 parts of APP (ammonium polyphosphate), 2 to 10 parts of titanium dioxide, 5 to 12 parts of melamine, 5 to 12 parts of pentaerythritol, 0.5 to 1.5 parts of bentonite, and 2 to 4 parts of chlorcosane. The related indexes of the fire retardant coating of a super thin steel structure meet the national standard, the toxic gas release does not exist in a work process, safety and environmental protection are realized, and the fire retardant coating can be widely used in various steel construction, two data of the surface dry time and the fire endurance thereof are superior to the national standard, the effect is obvious, and the great market value is achieved.