36results about How to "Reduce processing viscosity" patented technology

The invention relates to a hyperbranched poly (ether ketone), a preparation method thereof and application of the material in viscosity modifiers. The hyperbranched poly(ether ketone) is prepared wit BB2-type monomers 2, 4, 6 trifluoro phenyl ketone and A2-type monomers hydroquinone, resorcin, bisphenol A, and hexafluoro-bisphenol A or biphenyl diphenol as reactants, potassium carbonate or sodium carbonate or the mixture of the potassium carbonate and the sodium carbonate as a salification agent, and sulfolane or N, N-dimethyl ketopyrrolidine as a solvent through mixing, salification, polycondensation reaction and after treatment. The solid content is 20 to 30 percent; the dosage of the salification agent is 1 to 1.1 time of the dosage of the A2 monomers. Fluorine terminated hyperbranched polyaryletherketone and hydroxy terminated superbranched polyaryletherketone are got respectively by adjusting the ratio of the dosages of the BB2-type and A2-type monomers. The hyperbranched poly (ether ketone) is characterized in that by adding the superbranched polyaryletherketone, the mechanical property and the thermostability of linear polyaryletherketone are not reduced while the melt viscosity of the linear polyaryletherketone is reduced.

A nano-class silica rubber modified ultrahigh-molecular polyethene used for antiwear pipe is prepared through proportionally mixing ultrahigh-molecular polyethene, nucleator, lubricant, rheological asistant and antioxidizing agent, high-speed stirring, adding silica rubber nanoparticles, stirring, and dual-screw extruding out to obtain granular product.

The present invention relates to a preparation method of inorganic-organic high-molecular composite particle and its special-purpose equipment. The inorganic particle can be directly reacted with organic high-molecular compound in a reactor still, under the action of mechanical energy and heat energy provided by reactor still the inorganic particle is reacted with organic high molecular to make chemical linkage, and one layer or several layers of organic high-molecular membranes can be formed on the surface of the particle so as to obtain the invented hydrophobic inorganic-organic high-molecular composite particle which can have an affinity for organic high-molecular material. Its special-purpose equipment is formed from horizontal reaction still with jacket, motor and control cabinet, etc.

The invention relates to a process for preparing 3,3',5,5'-tetramethyl-4,4'-biphenyl didycidyl ether, wherein the 3,3',5,5'-tetramethyl-4,4'-biphenol is reacted with excess epichlorohydrin under the action of phase transition catalyst. The prepared has low epoxy equivalent weight, high yield, and simple reaction steps.

The invention relates to a process for enhancing the concentration of the fiber derived dissolved and colloidal substances in process water that comes from mechanical pulping. According to the invention, process water is treated with enzyme preparations that have an effect on carbohydrates and that contain mannanase and/or endoglucanase, in particular, which break down the soluble carbohydrate polymers contained by the process water into low molecular weight oligosaccharides. The treatment prevents an increase in viscosity so that process water can be concentrated into a high dry content, or the treatment can be used to lower the viscosity of previously concentrated process water to facilitate after-treatment.

The invention discloses a flexible neutron radiation protection material. The material comprises four layers of structures, wherein the first-layer structure comprises the materials in parts by weight: 10 to 40 parts of rare earth mineral powder, 1 to 20 parts of a tungsten-nickel alloy and 50 to 90 parts of natural rubber; the second-layer structure comprises the materials in parts by weight: 5 to 20 parts of rare earth mineral powder, 50 to 80 parts of natural rubber, 5 to 20 parts of aluminum and 5 to 30 parts of a tungsten-nickel alloy; the third-layer structure comprises the materials inparts by weight: 50 to 100 parts of natural rubber, 5 to 25 parts of aluminum and 5 to 40 parts of a tungsten-nickel alloy; and the fourth-layer structure comprises the materials in parts by weight: 1-10 parts of gadolinium, 50-85 parts of natural rubber, 20-40 parts of aluminum and 2-10 parts of B4C. The material provided by the invention has certain radiation resistance, and can meet the radiation protection requirements of personnel, equipment and devices especially when working in places with complex nuclear radiation backgrounds near strong neutron radiation sources such as nuclear reactors and the like.

The invention especially relates to a high-heat-resistance PVC/ABS alloy material modified by a nanometer calcium carbonate filling material and a preparation method thereof, belonging to the technical field of high polymer materials. Calcium carbonate (CaCO3) is one of the frequently used additives and heatproof modifiers for polyvinyl chloride; however, too high addition amount of calcium carbonate leads to decline of mechanical properties, deterioration of the fluidity of PVC and degradation of processing properties. Directed at the above shortcomings in the prior art, the invention provides the high-heat-resistance PVC/ABS alloy material modified by the nanometer calcium carbonate filling material and the preparation method thereof. According to the invention, dioctyl phthalate and monoglyceride stearate are used for composite modification, so the processing viscosity of a system is greatly reduced and the compatibility between nanometer calcium carbonate and PVC is improved; and two-step processing, i.e., mixing via a mould pressing method and molding via an injection molding process, is carried out, so problems in uniform blending of nanometer calcium carbonate and PVC are further overcome. The high-heat-resistance PVC/ABS alloy material provided by the invention has the advantages of high nanometer calcium carbonate content (as high as 75 parts), high plasticization peaks and balance torque, high impact strength, high toughness, excellent heat resistance, etc.

The invention belongs to the technical field of polymer materials, particularly relates to a high-gloss polypropylene resin composition, and further discloses a preparation method of the high-gloss polypropylene resin composition, and applications in preparation of high-gloss polypropylene composite materials. According to the present invention, by using the prepared high-gloss polypropylene matrix resin as the raw material and supplementing with the selected nucleating agent and the selected brightener, the anti-impact polypropylene resin with characteristics of good gloss, good impact resistance, good rigidity, high rigidity-toughness balance and low shrinkage rate is obtained while the shrinkage rate is significantly reduced, such that the assembly of injection molding parts and the substitutability of engineering plastics are improved, and the shortcomings in the prior art are effectively overcome.

The invention discloses a high-thermal-conductivity nylon-graphite-low-melting-point metal composite and a preparation method thereof. The high-thermal-conductivity nylon-graphite-low-melting-point metal composite is prepared from, by weight, 20%-50% of nylon resin, 30%-60% of graphite, 5%-20% of low-melting-point metal, 0.1%-1% of antioxidant and 0.1%-1% of lubricant. The low-melting-point metal has the low melting point, the high thermal conductivity, and the low viscosity in a molten state, dispersion of filler in a matrix can be promoted through addition of the low-melting-point metal, the thermal conducting property is improved, and processing viscosity is reduced. The composite has the advantages of being high in thermal conductivity, low in density, good in mechanical and processing property, uniform in filler dispersion and the like.

The invention discloses a liquid crystal polymer with ion groups and a preparation method for the liquid crystal polymer. The liquid crystal polymer with the ion groups is formed by virtue of polycondensation of one or more of diol, diphenol or diamine, monomers with ion groups and acyl chloride. The preparation method for the liquid crystal polymer with the ion groups comprises: adding one or more of diol, diphenol or diamine into DMF, THF, acetonitrile, ethyl acetate or DMSO to obtain a mixed solution I; adding an acid-binding agent into the mixed solution I to obtain a mixed solution II; slowly dropwise adding the acyl chloride which is dissolved into the DMF, the THF, the acetonitrile, the ethyl acetate or the DMSO into the mixed solution II to obtain a mixed solution III; and adding alcohol substances into the mixed solution III, and performing washing and drying to obtain the liquid crystal polymer with the ion groups. The liquid crystal polymer with the ion groups disclosed by the invention is applied to the fields such as car parts, precise electronic instruments, light-guide fibers, medical apparatuses and instruments, waterproof materials, textile field, heat insulation materials, energy storage materials, body armors or parachutes and the like.

The invention discloses a preparation method of a polymer blended functionally gradient composite material. The method comprises the following steps: 1) preparation of a blending system: dispersing charged polymer micronanospheres into a solvent-free liquid-state polymer matrix for blending, to obtain a blend; and 2) formation of a gradient structure through driving of a direct-current electric field: adding the blend between energized positive and negative electrodes, leading the charged polymer micronanospheres to move towards the electrode with opposite charges in the liquid-state polymer matrix to form gradient distribution under the driving of a high-voltage direct-current electric field, and moving the electric field after the liquid-state polymer matrix is cured. The long molecularchain of the polymer is curled into the polymer micronanospheres which are dispersed into another polymer matrix so as to reduce the processing viscosity and improve the phase separation speed, and then the microspheres are driven by utilizing the high-voltage electric field and the concentration gradient can be generated through electrophoresis movement, thus obtaining a gradient structure with gradually varied composition and properties.

The invention provides a tire tread rubber composition which has good processing performance, packing dispersibility and wearing resistance and has no hysteresis loss increase. The rubber composition is prepared from the following components in parts by weight: 100 parts of rubber, 40-120 parts of silicon dioxide, 0.1-20 parts of amine salt and 1-20 parts of silane coupling agent in 100 parts of silicon dioxide. The invention also relates to an inflatable tire using the rubber composition for preparing the tire tread.