59 results about "Polymerization" patented technology

The invention relates to a cyclic production method of glyphosate, belonging to the technical field of pesticide production techniques. The production method comprises steps as follows: the raw material dimethyl phosphite is subjected to an alkyl ester method to obtain glyphosate and a glyphosate mother solution; the glyphosate mother solution is treated to obtain a secondary alkali mother solution; the secondary alkali mother solution is subjected to catalytic preoxidation, high-temperature high-pressure air electrocatalytic degradation and liquid membrane extraction to obtain a liquid membrane concentrated solution and a saliferous liquid membrane diluted solution; the liquid membrane concentrated solution is subjected to active carbon decoloration, concentration by evaporation, and high temperature polymerization to obtain sodium tripolyphosphate; the saliferous liquid membrane diluted solution is filtered by a nanofiltration membrane to obtain a membrane concentrated solution and a membrane diluted solution; the membrane concentrated solution returns to the catalytic preoxidation step to be recovered; the membrane diluted solution enters an MVR (mechanical vapor recompression) system to be subjected to concentration by evaporation, thereby obtaining sodium chloride crystal, distilled water and a mother solution; and the sodium chloride crystal, distilled water and mother solution are respectively utilized. The invention lowers the production cost, enhances the utilization ratio of the product, reduces the discharge of waste liquor in the glyphosate production procedure, is environment-friendly, and has obvious comprehensive economic benefit and social benefit.

The invention discloses spherical polybutylene-1 with high isotacticity and a preparation method thereof as well as a catalyst used by the method. The method comprises the following steps: catalyzing the polymerization of a butene-1 monomer body to polymerize by using a loaded ziegler-giulio natta spherical catalyst system, wherein hydrogen is a molecular weight adjustor; adding an electron donor compound; implementing temperature-gradient polymerization in a temperature range from -10 DEG C to 50 DEG C, wherein polybutylene-1 suspends in the reaction system in form of spherical particles; and flashing to recover unpolymerized monomers to obtain spherical polybutylene-1. Spherical polybutylene-1 with high isotacticity can be obtained by adjusting the partial pressures of the electron donor and hydrogen, wherein the isotacticity is greater than 95%, the isotacticity is greater than 0.30g/cm<3> and the isotacticity is 0.1-30g/10min. The catalyst used in the method consists of a carrier, an active component, the electron donor and a promoter.

A process for preparing polymers which comprises conducting polymerization in the presence of free radicals of the formula Iwhere Q is NR2 or S and T is CR3R4 or S and R1, R2, R3 and R4 can be identical or different and independently are hydrogen, C1- to C20-alkyl or C6- to C18-aryl.

The invention discloses a preparation method of polyarylether containing quaternary ammonium side groups, comprising the following steps: a) adding bisphenol containing tertiary amine side groups, a halogenated organism monomer or nitrated organism monomer, a catalyst and a solvent, thus obtaining mixed solution; b) obtaining polyarylether containing tertiary amine side groups by polymerization reaction of the mixed solution obtained from the step a) at temperature of 30-180 DEG C; and c) adding halogenated hydrocarbon in the polyarylether containing tertiary amine side groups, and stirring at temperature of 0-100 DEG C, thus obtaining the polyarylether containing quaternary ammonium side groups. The invention also discloses a polyarylether containing quaternary ammonium side groups, and the sites and the number of the quaternary ammonium side groups are controllable. Compared with the prior art, the materials used in the invention is bisphenol containing tertiary amine side groups, no additional tertiary amine side groups or quaternary ammonium side groups are introduced in the generation process of the polyarylether containing quaternary ammonium side groups, so that the sites and the number of the quaternary ammonium side groups in the polyarylether are controllable, in addition, the conversion rate is complete and the laboratory yield is higher than 95%.

A method of producing an optical film comprising at least two ionizing radiation-curing layers on a transparent substrate, the method comprising: Step 1 of irradiating a layer A, which comprises two or more kinds of polymerization initiators having different absorption ends at a longer wavelength side in wavelength range of sensitivity to which they are sensitive, with an ionizing radiation having a wavelength to which at least one kind (a) of the polymerization initiators is not substantially sensitive and at least one kind (b) of the polymerization initiators is sensitive; and Step 2 of spreading a coating solution for layer B comprising at least one polymerization initiator (c) over the layer A after Step A and then irradiating the coating solution for layer B with an ionizing radiation having a wavelength to which the polymerization initiators (a) and (c) are sensitive.

A method for manufacturing a display device, having hollows containing fine particles, for displaying an image using the fine particles includes a step of packing a dispersion in the hollows, the dispersion containing the fine particles, a dispersion medium, and a precursor, dissolved or dispersed in the dispersion medium, for forming a sealing layer; a step of providing a support layer on partitions; a step of coating a face of the support layer and end portions of the partitions with the sealing layer precursor by allowing the face of the support layer and the end portions of the partitions to adsorb the sealing layer precursor, the face of the support layer and the end portions of the partitions being in contact with the dispersion; and a step of forming the sealing layer by subjecting the resulting sealing layer precursor to at least one of polymerization and cross-linking.

A method of preparing an optical material by polymerizing a resin composition including a thiol group-containing compound and an isocyanate group-containing compound, particularly, a method of preparing a high-quality urethane-based optical material using a universal polyisocyanate compound. According to one aspect, a resin composition including a polythiol compound and a widely available polyisocyanate compound, as main components, and having a moisture content of 300 to 3,000 ppm is template-polymerized to prepare the optical material. A colorless, transparent, and high-quality urethane-based optical material may be efficiently prepared in high yield using a low-cost and widely available isocyanate compound through template-polymerization using a tape while minimizing generation of white tape residues and foaming.

The invention discloses an online purification solid-phase extraction monolithic column and a preparation method and purposes of the monolithic column. The monolithic column comprises a column pipe and a column body generated by in-situ polymerization in the pipe, wherein the column body is a polymer of butyl methacrylate-ethylene glycol dimethacrylate. According to the monolithic column, the surface of the bed of the monolithic column is provided with C4 groups, and the column structure is continuous and porous and has a certain mechanical strength and biocompatibility. Compared with a traditional filling extraction column, the online purification solid-phase extraction monolithic column has the characteristics of filling simplicity, low reaction pressure, repeated utilization and high extraction efficiency and can be used for online purification and enrichment of Sudan red in hot pepper products and glucocorticoid and other weak polarity compounds in milk. The technology provides a novel path for rapidly analyzing pollutants in food.

The alicyclic compound of the present invention has a five- or more membered ring structure having an epithioethylene linkage and/or an epidithioethylene linkage, and has tow or more sulfur atoms in its molecule. Optical materials produced by curing the alicyclic compound or a composition containing the alicyclic compound by polymerization show high refractive index.

The invention provides an elastic pure cotton woven fabric with smooth surface and soft handle and a preparation method thereof. The method includes the steps of: pretreatment; alkali mercerizing treatment: employing an alkali liquor with a concentration of 20-28 Baume degree to conduct treatment for 45s-60s; liquid ammonia mercerizing treatment; enzyme treatment: putting a fabric in a working solution containing cellulase, and flapping the fabric at the same time; softening treatment: using a ternary polymerization softening agent to perform softening treatment on the fabric; washing and setting treatment; and pre-shrinking treatment, thus obtaining a pure cotton woven fabric finished product. The pure cotton woven fabric obtained by the technical scheme provided by the invention not only has silky gloss, but also has obvious tightness and good resilience in itself, and the handfeel is soft and full. At the same time, the fabric does not contain formaldehyde, and is safe to human body.

The invention provides an environment-friendly spackling compound and a preparation method thereof. The preparation method of the environment-friendly spackling compound comprises the following steps: weighing 80-85% of ground calcium carbonate and 5-10% of light calcium carbonate, and then adding 2-8% of plant-modified polymerization rubber powder, 0.3-0.8% of corrosion remover and 1-2% of assistant to evenly mix, so as to form a solid component; mixing and stirring 65-75% of solid component with 25-35% of deionized water to form paste putty, namely the environment-friendly spackling compound. By adopting a plant-modified adhesive, the environment-friendly spackling compound not only has low-carbon and environment-friendly characteristics of being free of formaldehyde pollution and free of harm to a human body, but also has the advantages of wide raw material source, low cost, and ecological sustainable development in comparison with the existing spackling compound.

Disclosed therein is a method for preparing a polyacrylonitrile-based polymer for preparation of carbon fiber having a melting point controlled by selecting an optimal energy of microwave, and a method for preparing a carbon fiber through melt spinning using the preparation method for polyacrylonitrile-based polymer. The present invention uses microwave to control the properties of the polyacrylonitrile-based polymer in a simplified way and prepare the polymer optimized for preparation of carbon fiber precursor through melt spinning for a short polymerization time, and provides a means for mass production of the polyacrylonitrile-based polymer being suitable for melt spinning at a temperature lower than the stabilization temperature and acquiring properties adequate to preparation of carbon fiber through stabilization. Hence, the present invention is expected to contribute to mass production of high-performance carbon fibers at reduced cost.

The invention discloses parallel polymerization synthesis equipment which comprises an elevating mechanism provided with a transition saddle and an elevating pallet. An annular heating seat is arranged on the transition saddle, at least two heating kettles are embedded into the heating seat, and heat supply equipment of different heating kettles have different power and are separately arranged; the heating seat is provided with round holes over the heating kettles, and the round holes and the heating kettles form a flask seat. The upper part of the elevating pallet is connected with a stirring saddle, the lower part of which is provided with stirring axes that have the same quantity as the heating kettles and are connected with stirring paddles at the lower part, and the stirring paddles and the stirring axes are all positioned right above the corresponding heating kettles; and a stirring driving motor is arranged over the stirring saddle. The parallel polymerization synthesis equipment is applicable to stirring and mixing reactants or products with high or low viscosity, can provide multiple reaction temperature and stirring speed in a same reaction period, and is applicable to reaction containers of various types, thereby greatly saving the scientific research time of researchers, reducing labor intensity in scientific research, improving scientific research efficiency, and quickening the development of scientific research.

The invention provides a high-fidelity durable lightfast UV/UVLED curing coating for a note and a preparation method of the high-fidelity durable lightfast UV/UVLED curing coating. The high-fidelity durable lightfast UV/UVLED curing coating comprises a prepolymer, a pre-polymerization monomer, an initiator, an assistant, a stabilizer and an amine type accelerator, wherein the prepolymer is one of or a combination of more of aliphatic modified epoxy acrylate, acid modified urethane acrylate, aliphatic urethane acrylate, and aromatic urethane acrylate; the pre-polymerization monomer is one of or a combination of more of methacrylate, acrylate, and a vinyl ether monomer. The UV/UVLED coating has the characteristics of transparency, high whiteness and low glossiness, the original color of a printing material is not changed after the surface of the printing material is coated with the coating, and the coating is high in fidelity, and has the physical and chemical resistant properties meeting the requirements of the note when applied to the note.

The invention discloses a preparing method of profiled amphoteric ion type polymer and application, which is characterized by the following: setting the molecular weight of the polymer as 72000-100000; setting the spread of the molecular weight at 1. 0-1. 2; choosing one or several fatty alcohol solution; segment-heating; batch-adding into polymerization initiator; adding into brine acetate water solution; proceeding amphoteric ionization; getting the product; forming thin film; possessing good transparency. This invention possesses good compatibility with hair and conditioning property.

A method for producing a slurry for a heat-resistant layer for a lithium ion secondary battery, including: a step of producing a polymer aqueous dispersion by polymerizing a monomer in an aqueous medium to give a polymer aqueous dispersion containing a polymer with a polymerization conversion rate of 90 to 100%, a step of obtaining a mixed solution by mixing N-methylpyrrolidone and the polymer aqueous dispersion, a step of obtaining a binder composition by removing an unreacted monomer and the aqueous medium from the mixed solution, and a step of obtaining a slurry by dispersing non-conductive microparticles in the binder composition, wherein the step of obtaining the binder composition includes removing the aqueous medium and the unreacted monomer by using a distillation column under a reduced pressure so that the binder composition contains the unreacted monomer and a water content in predetermined amounts.

Provided is a method for producing a polyvinyl alcohol resin, with which impurities can be efficiently eliminated by a small amount of washing liquid. Polyvinyl alcohol obtained via a polymerization step (step S1) and a saponification step (step S2) is washed in a washing step (step S3) using a washing liquid comprising methyl acetate: 1 to 40 parts by mass, methanol: 50 to 98.9 parts by mass, and water: 0.1 to 10 parts by mass. The solid concentration of a slurry containing the washing liquid is brought to 1 to 30 mass% in the washing step (step S3).

The invention discloses a degradation method of polymer procyanidins. The degradation method comprises the following steps: adding 5 to 10 times volume of lithium hydroxide aqueous solution with masspercent of 1 to 5 percent into the polymer procyanidins, carrying out stirring reaction at the temperature of 60 to 80 DEG C for 10 to 30 minutes and adding hydrochloric acid to terminate the reaction; then concentrating and freeze-drying. Oligomeric procyanidins obtained by the method has the advantages of high content, low polymerization degree, improved water solubility, reduced turbidity and high recovery rate; in addition, the oligomeric procyanidins can be applied to the fields of food, medicine, cosmetics and the like which have higher water-solubility requirements and the application range of the oligomeric procyanidins is expanded. The method is simple in process, and has low requirements on personnel and equipment in the implementation process; the used organic solvents have lowprice and can be recycled, so that the cost is low; after degradation, the content of the oligomeric procyanidins is increased and invariance of compositions in the raw materials can be ensured.

The cross-linked polyaminocarboxylates for the removal of metal ions from aqueous solutions of the present invention are cross-linked anionic polyelectrolytes CAPE 6 and CAPE 9, containing pH-responsive amino acid residues. The cross-linked anionic polyelectrolytes have been synthesized via cycloco-polymerization and ter-polymerization of a diallylammonioethanoate monomer (90 mol %) and a cross-linker, 1,1,4,4-tetraallylpiperazinium dichloride (10 mol %) in the absence of SO2 (CAPE 6) and in the presence of SO₂ (CAPE 9), respectively. For the sorbents CAPE 6 and CAPE 9, the efficiency of Cu²⁺ removal at an initial metal concentration of 200 ppb was found to be 77.5% and 99.4%, respectively. Treatment of real wastewater samples spiked with Cu²⁺ ions showed the excellent ability of the cross-linked anionic polyelectrolytes to adsorb metal ions.

The invention provides a preparation method of organic tin-free vinyl chloride-isobutyl vinyl ether copolymer resin (chlorine ether resin for short). The preparation method comprises the steps of adding the materials including deionized water, an emulsifying agent, a buffer agent and the like into polymerizing kettle, heating to a specified temperature, adding an emulsified mixture of the materials including vinyl chloride, isobutyl vinyl ether, deionized water, an emulsifying agent, a buffer agent, stabilizers and the like and materials including an initiator and the like in a batch or continuous manner to generate polymerization, and adding the stabilizers in the later period of the reaction, so as to obtain the organic tin-free chlorine ether resin, wherein the stabilizers are substances containing non-organic tin stabilizers with epoxy groups. The prepared organic tin-free chlorine ether resin has good thermal stability and can be applied to the fields of ink, coatings and the like of tools, foods and medical products. The preparation method has the advantages that the chlorine ether resin does not contain organic tin and has good thermal stability.

The invention discloses a preparation process of a leak protection plugging agent along with drilling based on the control of monomer concentration. The preparation process comprises the following steps: (a) purifying AM (acrylamide) and AMPS (2-acrylamido-2-methyl propane sulfonic acid) for later use; (b) weighing AA (acrylic acid), hydrolyzing and transferring into a reactor in a super constant-temperature water bath; (c) adding a certain amount of cross-linking agent; (d) adding AM and AMPS solutions, and regulating the pH value of a reaction system to 7, wherein the monomer concentration is 14.3%-18.2% by weight; (e) introducing inert gas for deoxygenation, stirring and adding an initiator; and (f) regulating the temperature to reaction temperature, and performing polymerization reaction for a certain period of time to get a target product. According to the preparation process disclosed by the invention, the leak protection plugging agent along with drilling can be successfully prepared by controlling the monomer concentration in reaction process, the preparation process further has the advantages of high production efficiency, simple production process, simplicity in operation and capability of greatly reducing the production cost, various performances of the produced leak protection plugging agent along with drilling are far better than those of an existing product, and the leak protection plugging agent along with drilling is further conductive to field well leakage treatment.

The invention relates to a preparation method of a 3853 oxide (with the full name of 2, 2, 6, 6-tetramethyl-piperidinooxy stearate), and aims to solve the problem about generation of the product in the market at present. The manufacturing technique of the 3853 oxide adopts and introduces a novel structure, adopts a transesterification route, post-processing adopts oxidation filtering to replace previous water washing, so that waste water discharge is reduced. The product grade is improved through introducing a polymerization inhibitor 701 into a group, and besides, the methyl stearate raw material is low in cost, so that popularization of the photostabilizer market is facilitated.

The invention discloses a polyvinyl acetate polymerization method, which uses dimethyl azobisisobutyrate as an initiator to initiate polymerization. The initiator has the advantages of safety, non-toxicity, stable performance, stable decomposition rate, and high initiation efficiency. The PVAC produced has narrow distribution, good quality, high conversion rate, and no residue and agglomeration.

The invention relates to a method for preparing a metatitanic acid doped polyaniline combined electrode nanomaterial for a super capacitor and electrochemical performance analysis for the nanomaterial, belonging to the field of preparation of electrode materials of the super capacitor. In the invention, an in-situ chemical polymerization method is used for preparing the metatitanic acid doped polyaniline combined electrode nanomaterial with a coralliform shape and a uniform dimension to serve as an anode material, activated carbon serves as a cathode material, the anode material and the cathode material are assembled into an asymmetrical super capacitor, and a comprehensive performance analysis test is performed. Results from the embodiment of the invention show that the metatitanic acid doped polyaniline combined electrode nanomaterial has the discharge specific capacitance reaching over 90F/g and the cycle life reaching over 2000 times, the specific capacitance value of the metatitanic acid doped polyaniline combined electrode nanomaterial is always stabilized to be over 90% of an initial value in a cyclic process, and the metatitanic acid doped polyaniline combined electrode nanomaterial has a practical application value.