116 results about "Post polymerization" patented technology

The invention provides a chemical bonding type rare earth light conversion film and a preparation method and application thereof, and the preparation method comprises the following steps: (1) mixing a rare earth light conversion material, a photoinitiator and master batch resin, and extruding to obtain a rare earth light conversion master batch; and (2) mixing the rare earth light conversion master batch obtained in the step (1) with matrix resin, and extruding to obtain the chemical bonding type rare earth light conversion film, the molecular structure of the rare earth light conversion material contains unsaturated double bonds; in at least one of the step (1) and the step (2), the step of ultraviolet irradiation is further included after extrusion is finished. According to the preparation method, the chemical bonding type rare earth light conversion film is prevented from being prepared in a mode of firstly polymerizing and then coordinating or firstly coordinating and then polymerizing, the process is simple, the cost is low, the migration, agglomeration and overflow phenomena of the rare earth light conversion material in the light conversion film can be greatly reduced, the light conversion service life of the light conversion film can be greatly prolonged, and the aging resistance of the light conversion film can be greatly improved.

The invention discloses intrinsic copolymerized low-temperature toughened polyamide resin which comprises a polyamide component and a flexible chain segment component, and the molar ratio of the polyamide component to the flexible chain segment component is 98.5: 1.5-85: 15; the invention also discloses a preparation method of the intrinsic copolymerized low-temperature toughened polyamide resin, which comprises the following steps: mixing a polyamide component and a flexible chain segment component, and carrying out polymerization reaction in a sectional or continuous manner, and comprises a pre-polymerization process and a post-polymerization process; the intrinsic copolymerized low-temperature toughened polyamide resin obtained by the preparation method disclosed by the invention keeps excellent mechanical strength and modulus while improving low-temperature resistance of the intrinsic copolymerized low-temperature toughened polyamide resin.

The invention discloses a 4, 4 '-bis (omega-alkenyl thioether) diphenyl sulfide monomer and a preparation method, the structural general formula of the 4, 4'-bis (omega-alkenyl thioether) diphenyl sulfide monomer is shown in the specification, n represents the number of methylene and is a positive integer, n = 1-10, the refractive index of a polymer obtained after the monomer and 4 '4-dimercapto diphenyl sulfide are polymerized is larger than 1.65 and smaller than 1.8, diffraction efficiency is remarkably improved, the preparation method is easy to operate, and the preparation method is suitable for industrial production. The invention further provides a photopolymer type holographic recording medium containing the monomer and a preparation method of the photopolymer type holographic recording medium, the sensitivity of the holographic recording medium is larger than 100 cm / mJ, the diffraction efficiency of a recording grating is larger than 95%, the refractive index modulation degree is larger than 0.1, the shrinkage rate is lower than 1%, and the preparation method is simple, controllable and suitable for industrial production. The invention also provides a volume holographic grating containing the holographic recording medium, a holographic optical element and an optical device.

The invention provides a self-repairing modified graphene water-based coating composition as well as a preparation method and application thereof. Graphene is modified through free radical polymerization of 4-styrylpyridine (BPP) on the surface of graphene, and then coulomb interaction between protonated positive charges of BPP polymer graphene and negative charges of phosphotungstic acid anions is realized, so that the self-repairing modified graphene water-based coating composition is obtained. According to the present invention, the combination effect needs to be optimized by regulating the pH value of the solution, the obtained coating material has characteristics of high corrosion resistance, high self-repairing ability and high mechanical property, and the coating can be used in the fields of self-building cleaning exterior walls, automobile finishing paints, sea-crossing bridges, offshore wind power towers, chemical pipelines, and mobile phone / computer shell antistatic coatings.

The invention discloses a polymeric ferric sulfate production filtering device and filtering method.The polymeric ferric sulfate production filtering device comprises a filtering box, a filtering base is fixed between the inner walls of the filtering box, a filtering cavity is formed in one side of the top of the filtering base, a plurality of filtering holes are formed in the bottom of the filtering base in a penetrating mode, and a foam puncturing static electricity removing mechanism is arranged on the filtering box; the invention relates to the technical field of polyferric sulfate production. According to the polymeric ferric sulfate production filtering device and filtering method, through the arrangement of the foam puncturing static electricity removing mechanism, the movement of the L-shaped rod is utilized to drive the stabs to move and puncture foams generated by a stirred polymeric ferric sulfate solution, positive and negative charges on the surface of a liquid film can be separated when the foams are broken, and the charges are transferred to the bottom wall of the filtering seat; through rolling of the static electricity eliminating roller, the static electricity eliminating roller generates charges opposite to the filter seat and the polymeric ferric sulfate colloid particles through an external high-voltage power supply, static electricity between the filter seat and the polymeric ferric sulfate colloid particles is neutralized, the static electricity adsorption force is weakened, and the filtering efficiency is greatly improved.

The present invention belongs to the technical field of deep processing of starch, and particularly relates to a resistant dextrin and a preparation method thereof. The present invention adjusts the pH value of the starch milk to 4.6 - 5.1, which not only denatures the starch to facilitate subsequent dextrinization, but also removes protein impurities in the starch, reducing the subsequent refining burden. The present invention controls the temperature of the first dextrinization to be 120 - 130 °C, avoiding the problem of dark color of the crude resistant dextrin caused by high temperature. At the same time, the pressure of the first dextrinization is controlled to be -0.05 - -0.07 MPa, so that after the first dextrinization, the proportion of resistant dextrin with a degree of polymerization <6 is about 80 wt%. Then, the second dextrinization is carried out to ensure that there are sufficient small molecule sugars in the system during the second dextrinization, facilitating the generation of a highly uniform resistant dextrin under mild conditions, and the content of resistant dextrin with a degree of polymerization of 7 - 13 in the dietary fiber of the crude resistant dextrin is 81 wt%.

The application discloses a surface treatment process of an antistatic and low-fuzz surgical drape, and relates to the field of layered products.The treatment process comprises the following steps: S1, using a dielectric barrier discharge plasma to treat the surgical drape; S2, using a padding method or a spraying method to apply an antistatic agent solution; S3, uniformly spraying an end-capping agent solution on the surface of the drape treated in the step S2; and S4, steam sterilization, and obtaining the antistatic and low-fuzz surgical drape after cooling.The low-melting-point polymer is compounded with the water-soluble end-capping agent, and combined with high-pressure steam sterilization, so that the polymer can migrate to the end along the capillary effect of the fiber surface after contacting the surface of the drape, and the auxiliary film-forming agent can be instantaneously swelled when meeting water vapor, the polymer can be guided to wrap the fiber end breaking point, and the polymer can be solidified to form a microspherical mechanical lock after cooling.The physical wrapping mechanism of the application can more completely control the falling of the fuzz, so that the risk of foreign body reaction or infection of a surgical incision caused by the falling of the fuzz can be further reduced.

The invention relates to the technical field of polyester material production, and discloses a polymerization method and system for producing chinlon 6 slices, and the provided chinlon 6 slices have the advantages of higher relative viscosity, narrower molecular weight distribution, lower water content, and higher yield. According to the system used by the invention, a ZnO / Al2O3 composite variable active catalyst adding window is directly arranged at the bottom of the melting and mixing unit 1, so that the ZnO / Al2O3 composite variable active catalyst can be ensured to be more uniformly dispersed in the whole reaction system, the reaction conditions are optimized, the variable active catalyst is adopted, the pH is dynamically regulated and controlled, and the reaction efficiency is improved. The exposure degree of active sites of the catalyst can be accurately adjusted according to the requirements of different stages of a polymerization reaction, generation of cyclic dimers in the caprolactam hydrolysis ring-opening process is effectively inhibited in the pre-polymerization stage, the content of cyclic by-products is remarkably reduced to 3.5% or below, the monomer utilization rate is increased, increase of the molecular weight is promoted in the post-polymerization stage, and the yield of the catalyst is increased. And product quality.

The invention discloses a reversible thermochromic polydiacetylene material and application thereof in medium-high temperature overheat monitoring, the material is an amide functionalized conjugated polymer containing polydiacetylene on both sides, and the preparation method comprises the following steps: a) reacting 10, 12-pentacosadiynoic acid with an amine compound to synthesize an amidated conjugated diacetylene monomer; and b) carrying out in-situ topological chemical polymerization on the diacetylene monomer under the irradiation of ultraviolet light to obtain the polydiacetylene material. The polydiacetylene material shows a remarkable thermochromic characteristic under thermal stimulation, the color of the polydiacetylene material changes in multiple steps at different temperature critical points, after the polydiacetylene material is cooled to the room temperature, the color of a polymer is rapidly restored, and the color change of the material is stable through multiple heating and cooling cycle experiments. The material can repeatedly monitor the real-time temperature of various electric appliances or equipment, and overheating after long-time use is avoided.

The invention discloses an immunomagnetic bead with thermomagnetic dual response, a preparation method of the immunomagnetic bead and application of the immunomagnetic bead in detection of food-borne pathogenic bacteria. The preparation method comprises the following steps: (1) preparation of the magnetic core; (2) construction of the inorganic shell layer; (3) introduction of the temperature-sensitive polymer layer; (4) surface functionalization and streptavidin coupling; organic combination of the thermal response polymer and the magnetic core-shell structure is realized for the first time, so that the immunomagnetic bead has dual response capabilities of temperature control gathering and scattering and magnetic field separation. Under a low-temperature condition, the magnetic beads are kept in a dispersed state, so that target combination is facilitated; after the temperature is raised, the polymer is subjected to hydrophobic collapse, particles are gathered, and rapid capture is realized through a magnetic field, so that the detection efficiency and the binding stability are greatly improved.

The present invention provides a novel graft polymer composition which contains a graft polymer of cellulose acetate and a lactone and which achieves both excellent thermoplasticity and suppression of bleed out.　Provided is a polymer composition which contains a graft polymer of cellulose acetate and a lactone, wherein the proportion of a methanol-soluble material of the polymer composition as measured via the method below is in the range of 13-33 mass%. (Method for measuring proportion of methanol-soluble material) Under atmospheric pressure, in a 20°C environment, acetone is dissolved in 144 ml with respect to 24 g of the polymer composition, 1.5 L of methanol is added, and stirring is carried out for 12 hours. A mixture thus obtained is filtered with a PTFE membrane filter having a pore diameter of 1 μm, and a filter residue is collected. The obtained filter residue is put into 0.5 L of methanol again, and stirring is carried out for 1 hour. A mixture thus obtained is filtered with a PTFE membrane filter having a pore diameter of 1 μm, and a filter residue and a filtrate are collected. The obtained filter residue is put into 0.5 L of methanol again, and stirring is carried out for 1 hour. A mixture thus obtained is filtered with a PTFE membrane filter having a pore diameter of 1 μm, and a filter residue and a filtrate are collected. After the pH of the filtrate is confirmed to be 7, the filter residue is added to 1 L of methanol, and stirring is carried out for 12 hours. A mixture thus obtained is filtered with a PTFE membrane filter having a pore diameter of 1μm, and a filter residue is collected. The obtained filter residue is dried at 40°C for 12 hours in a vacuum, and a dry mass is thus obtained. From the dry mass of the polymer composition before purification and the dry mass of the polymer composition after the purification, the proportion of the methanol-soluble material contained in the polymer composition is calculated. Methanol-soluble component of polymer composition = dry mass of polymer composition before purification - dry mass of polymer composition after purification Proportion of methanol-soluble material contained in polymer composition = (mass of methanol-soluble component of polymer composition) / dry mass of polymer composition after purification × 100 (mass%)

The present application relates to nucleic acid molecules for CRISPR cascade nucleic acid detection system and application, and relates to the field of biological detection. The nucleic acid molecules comprise a polymerase binding leading region with a DNA polymerase binding site, a trigger nuclease cleavage region with a trans-cleavage endonuclease binding cleavage site, and an exonuclease polymerization blocking region with a modified 3' end; after the trigger nuclease cleavage region is cleaved, the polymerase binding leading region and the exonuclease polymerization blocking region are connected, the DNA polymerase bound to the polymerase binding leading region can extend the exonuclease polymerization blocking region from the 5' end to the 3' end, and a target sequence that can be recognized by the reporter sgRNA of the CRISPR reporter system is synthesized. The CRISPR cascade nucleic acid detection system constructed by using the nucleic acid molecules can realize two-stage cyclic amplification reaction, and improve the reporting speed, reporting intensity and reporting sensitivity of the CRISPR reporter system.

Provided in the present invention are a degradable ureteral stent and a preparation method therefor, which degradable ureteral stent is of a hollow circular tube structure (1), wherein a fixing structure (2) for preventing sliding is disposed on two ends or one end of the degradable ureteral stent, the tube wall of stent is also provided with a plurality of penetrating drainage side holes (3), and the material used for the stent is a composite material formed by at least a glycolide-ε-caprolactone copolymer, an ethylene oxide polymer and a medical developer. In the glycolide-ε-caprolactone copolymer, the weight percentage content of glycolide is 51-58%, such that the copolymer has appropriate mechanical strength and hardness, and the copolymer gradually becomes soft as the time of degradation increases; moreover, a certain proportion of the ethylene oxide polymer is added, and after the degradation thereof, the polymer has a lower modulus at a definite elongation and is softer and smoother, such that degraded fragments are not prone to becoming stuck and are easier to excrete from the body, and is thus more suitable for preparing a degradable ureter.

This application discloses a separator and a battery cell, relating to the field of secondary battery technology. The separator disclosed in this application includes a base layer and a coating layer located on at least one side of the base layer. The coating layer is made of a polymer, which includes primary particles and secondary particles. Before the separator comes into contact with the electrolyte, the average particle size of the primary polymer particles is A μm, and the average particle size of the secondary polymer particles is B μm. After the separator is wetted with the electrolyte, the average particle size of the primary polymer particles is C μm, and the average particle size of the secondary polymer particles is D μm. Furthermore, A, B, C, and D satisfy the following condition: 5% < (D-B) / B < (C-A) / A < 50%. The separator described in this application exhibits good electrolyte resistance and good adhesion to the electrodes.

This invention discloses a method for preparing a composite solid electrolyte and a method for preparing a battery, belonging to the field of battery technology. The method for preparing the composite solid electrolyte includes: 1. uniformly dispersing a modified oxide electrolyte with a nitride coating in a solvent; 2. dissolving lithium salt and polymer in the solvent of step 1 in a mass ratio of 1:2.5, with lithium salt first and then polymer; 3. coating the mixed solution onto a polytetrafluoroethylene mold using a coating machine and placing it in a vacuum drying oven to obtain a composite solid electrolyte membrane. The battery preparation method includes the above-described method for preparing the composite solid electrolyte. This invention can improve the interface between the battery negative electrode and the electrolyte, improve the dendrite condition of the lithium negative electrode interface, and simultaneously isolate some side reactions between the electrolyte and the negative electrode.

The invention relates to magnetic covalent organic framework (COF) composite nanomaterial immobilized lipase based on amino acid ionic liquid modification as well as a preparation method and application of the magnetic covalent organic framework (COF) composite nanomaterial immobilized lipase. The immobilized enzyme is prepared by taking Fe3O4 as a magnetic core, coating the magnetic core with dopamine, polymerizing to form a COF shell layer, modifying the surface of a carrier with amino acid ionic liquid (HisIL), and covalently immobilizing lipase (such as porcine pancreatic lipase), and the prepared immobilized enzyme is applied to catalytic synthesis of isoamyl acetate through esterification reaction.

In a first aspect, a metal-clad polymer film includes a polymer film adhered to a first metal layer. The root-mean-square roughness (Sq) of the interface between the polymer film and the first metal layer is less than 1 μm. The peel strength between the polymer film and the first metal layer is greater than 5 N / cm after 168 hours of aging at 150° C. when tested for a polymer film having a thickness in the range of from 25 to 75 μm and a first metal layer having a thickness of 18 μm in accordance with IPC-TM-650 test methods. The thickness of the first metal layer is 12 μm or less. The polymer film includes a first thermoplastic polyimide layer. In a second aspect, an electronic device includes the metal-clad polymer film of the first aspect. In a third aspect a process includes for forming a double-sided metal-clad polymer film.

The invention relates to a method for purifying a plastic feedstock to obtain a purified polymer stream, comprising: a) a dissolution step in which the plastic feedstock is brought into contact with a dissolution solvent; followed by b) an extraction step by means of size exclusion, in which beds of size exclusion solids are used in series, the polymer solution from a) is fed at an injection point (F) and an eluent is fed at an injection point (S), and the extract is removed at a removal point (E) and a raffinate comprising the purified polymer solution is removed at a removal point (R), the injection point and the extraction point are separated and are moved by one bed along with time according to a given frequency; followed by c) a polymer-solvent separation step to obtain a stream of purified polymer. The invention also relates to a device for carrying out step b) and to a device for carrying out said purification method.

The embodiment of the application provides a sulfur-containing polymer electrolyte and a preparation method thereof, relates to the technical field of supercapacitors, and the preparation method comprises the following steps: mixing double-hydroxyl-terminated polyether sulfone, 4,4'-dimercaptodiphenyl sulfide and an N,N-dimethylformamide solution, the N,N-dimethylformamide solution comprising an electrolyte salt and N,N-dimethylformamide, and stirring at a constant temperature under the protection of an inert atmosphere to generate a monomer mixture; adding terephthaloyl chloride to the monomer mixture to perform a polycondensation reaction, so as to obtain a prepolymer solution; heating the prepolymer solution to perform a post-polymerization reaction, cooling the prepolymer solution to room temperature, adding trimethylolpropane triacrylate and a photoinitiator and uniformly dispersing, so as to obtain a mixed system; performing a cross-linking reaction on the mixed system under ultraviolet light irradiation, so as to form a three-dimensionally cross-linked sulfur-containing polymer electrolyte film; and performing drying treatment on the sulfur-containing polymer electrolyte film, so as to remove residual solvents and obtain a target sulfur-containing polymer electrolyte.

This application discloses a high CTI insulation material and a cable. The high CTI insulation material comprises the following raw materials in parts by weight: 30-40 parts of polyethylene resin; 15-20 parts of polypropylene resin; and 5-7 parts of modifying additives. The modifying additives have a particle size of 4-5 μm and are a mixture of hydrated magnesium aluminate carbonate and the polymer product after hydrolysis of polysiloxane, wherein the polymer product after hydrolysis of polysiloxane coats the hydrated magnesium aluminate carbonate. The cable comprises a conductor and an insulation layer covering the conductor. The insulation layer is made of the high CTI insulation material of this application. The insulation material of this application has good tensile strength and excellent resistance to tracking. The cable of this application has good safety in harsh environments such as humidity and pollution.

The present invention relates to a process for preparing an aqueous polymer dispersion with a specific post-polymerization treatment step. It further relates to an aqueous polymer dispersion and its use as a binder for a coating, a non-woven or woven substrate, an adhesive, a mortar, a putty or a sealant, in particular a waterproofing cementitious coating having low tackiness and high impermeability to water.

The invention discloses a preparation method of modified polyvinyl alcohol and modified polyvinyl alcohol, and belongs to the technical field of chemical synthesis, the preparation method comprises the following steps: adding vinyl acetate, a comonomer and methanol into a reaction kettle, heating to 55-65 DEG C, then adding a methanol solution of an initiator, then dropwise adding the methanol solution of the comonomer, and after dropwise adding is completed, reacting for 1-2 hours; after the reaction is completed, adding a methanol solution of sorbic acid to terminate the reaction, so as to obtain a polymer material; adding the polymer material into a rectification device, rectifying to remove residual monomers, and then adding methanol to obtain a resin solution; adding a sodium hydroxide methanol solution into the resin solution, heating to 40-60 DEG C, stirring and reacting for 20-60 minutes, and then drying to obtain the modified polyvinyl alcohol which is good in water solubility and stable in product quality.

This invention discloses a method for preparing functional carbon materials with atomically dispersed Lewis acid-base sites, comprising: (1) polymer preparation to obtain a polymer sample; (2) polymer modification to obtain a modified polymer sample; (3) polymer carbonization: the modified polymer sample is heat-treated in a non-oxidizing atmosphere to carbonize the modified polymer sample; after carbonization, the system is naturally cooled; then, after washing and drying, the target functional carbon material is obtained. This invention utilizes atomically dispersed Lewis acidic metal sites and basic N sites to modify carbon materials in situ. The prepared functional carbon material has a large specific surface area, well-developed pore structure, abundant acid-base sites, and an atomically distributed structure, which can significantly improve the density of functional sites on the surface of the carbon material and its adsorption efficiency for boron, phosphorus, and metal impurities. Its application in the purification of chlorosilanes can greatly reduce the load of subsequent distillation and impurity removal, and improve the yield and quality of high-purity chlorosilanes.

The present invention discloses a rolling stirrer for microemulsion polymerization and its stirring method, which includes a housing. A main shaft is arranged inside the housing, and the main shaft can rotate around its axis. A rotating assembly is installed outside the main shaft, and the main shaft can drive the rotating assembly to rotate. The rotating assembly includes a rotating disk, and a fixed disk is arranged below the rotating disk. The fixed disk is sleeved on the main shaft, and the fixed disk can move up and down along the axial direction of the main shaft so that the upper end of the fixed disk approaches or moves away from the rotating disk. The rotating disk includes a main ring, and a plurality of extension rods are arranged outside the main ring. The fixed disk includes a disk body. When the upper end of the fixed disk approaches the rotating disk, the bottom of the extension rod can abut against the upper end of the disk body. The present invention provides a rolling stirrer for microemulsion polymerization and its stirring method, and after stirring, the polymer microemulsion has good dispersibility and high efficiency.

The present invention relates to a basalt fiber reinforced high tear toughness elastomer and a preparation method thereof, belonging to the technical field of composite materials. The elastomer is based on a nanocomposite gel as a matrix and a basalt fiber plain weave as a reinforcement material. The nanocomposite gel is located on both sides of the basalt fiber plain weave to form a three-layer sandwich structure. The elastomer is formed by pouring a nanocomposite gel prepolymer liquid on both sides of the basalt fiber and then polymerizing it. The prepolymer liquid is composed of propylene-based polymerization monomers, inorganic nanoparticle sol, initiator and catalyst. A basalt fiber reinforced high tear toughness nanocomposite elastomer is prepared by free radical in situ polymerization using the nanocomposite gel as a matrix and the basalt fiber plain weave as a reinforcement material. By means of the high mechanical properties of the nanocomposite gel and its ability to optimize the interface of the basalt fiber material, the elastomer has stronger tear energy and exhibits stronger mechanical properties.

The invention provides an integrated polymerization production system for flame-retardant nylon slices, which comprises a flame retardant preparation unit, a raw material mixing unit, a pre-polymerization unit, a post-polymerization unit, a grain-sized dicing unit, an extraction unit and a drying unit which are sequentially connected in series, the pre-polymerization unit is connected with the raw material mixing unit, and the post-polymerization unit is connected with the grain-sized dicing unit. The prepolymerization reaction device is used for carrying out prepolymerization reaction with multi-stage pressure-temperature control on the prereactant to generate a prepolymer; wherein the post-polymerization unit is connected with the pre-polymerization unit and is used for carrying out pressure-vacuum pulse controlled post-polymerization reaction on the prepolymer to generate a polymer; and pressure gradient linkage control and temperature curve matching are arranged between the pre-polymerization unit and the post-polymerization unit.

The application discloses a continuous polymerization method of anti-gel copolyamide 56 / 6 and the anti-gel copolyamide 56 / 6, and the continuous polymerization method comprises the following steps: preparing a water solution of polyamide 56 salt by using bio-based pentanediamine and adipic acid, mixing with caprolactam and / or a prepolymer thereof, conveying to a first-stage reactor, pre-polymerizing under normal pressure to form a prepolymer, conveying to a tubular programmed temperature device for programmed temperature and pressure maintaining, then conveying to a second-stage reactor for post-polymerization reaction, obtaining a copolyamide 56 / 6 melt, and finally cooling, granulating and drying to obtain the anti-gel copolyamide 56 / 6. The polymerization process of normal pressure pre-polymerization combined with programmed temperature can reduce the cost of polymerization equipment, effectively inhibit the side reaction of pentanediamine monomer decomposition and volatilization in the preparation process, reduce the melting point through copolymerization, thereby the spinning temperature of the obtained copolymer for spinning can be reduced, the gelation in the spinning process is reduced, the melt stability of the copolymer is enhanced, and the application in the spinning field is met.

The invention provides a water-based Teflon coating and a preparation method thereof, and belongs to the technical field of coatings. The preparation method comprises the following steps: depositing P-doped graphene quantum dots on Teflon particles, embedding the Teflon particles in a SiO2 shell layer, modifying the surfaces of the Teflon particles by using polydopamine, reacting with acrylic acid, polymerizing to prepare a modified polyacrylic resin emulsion, and uniformly stirring and mixing the modified polyacrylic resin emulsion with UiO-66 boron nitride particles, water, a defoaming agent, a dispersing agent, a flatting agent and a cosolvent to prepare the water-based Teflon coating. The prepared water-based Teflon coating overcomes the defects that in a traditional Teflon coating, polytetrafluoroethylene is prone to agglomeration in a water-based system and is poor in adhesive force, insufficient in hardness, poor in abrasion resistance, poor in heat dissipation performance and the like, the prepared water-based Teflon coating is good in mechanical property, abrasion-resistant, appropriate in hardness and good in adhesive force, and meanwhile, the water-based Teflon coating can be used for preparing water-based Teflon coatings. The coating is good in heat dissipation and heat conductivity, good in water dispersibility and convenient to store and transport, has the characteristic of weather resistance of a Teflon coating, and has a wide application prospect.

The application discloses a kettle type series continuous polymerization method and device of FEVE fluorocarbon resin, and the method comprises the following steps: continuously feeding: reaction raw materials are added into a prepolymerization kettle according to a formula proportion, the material in the prepolymerization kettle is monitored and controlled to keep in a set range, a prepolymerization reaction occurs, and a reaction material after the prepolymerization reaction is obtained; continuously polymerizing: the reaction material after the prepolymerization reaction sequentially passes through multiple post-polymerization kettles, a post-polymerization reaction occurs, continuous polymerization is carried out, and a FEVE fluorocarbon resin product is obtained; continuously discharging: the stable FEVE fluorocarbon resin product is collected at the outlet of the final post-polymerization kettle; and the reaction raw materials comprise fluorine-containing gas-phase monomers and hydrocarbon liquid-phase monomers, an initiator, a solvent and the like. Compared with the prior art, the application has the advantages of high automation degree, low energy consumption, good process stability and strong product quality consistency.

A method of making a release coated article is described comprising: providing a release coating comprising at least 50 wt. % of monomer(s) comprising an ethylenically unsaturated group and a terminal alkyl group with at least 18 (e.g. contiguous) carbon atoms based on the total amount of ethylenically unsaturated components; crosslinking components(s) comprising at least two ethylenically unsaturated groups; and at least one polymerization initiator. The release coating is substantially solventless, comprising no greater than 1 wt. % of non-polymerizable organic solvent. The method further comprises applying the release coating to a major surface of a substrate; and polymerizing the monomer(s) and crosslinking component(s) of the release coating after applying the release coating to the substrate. Also described are release coating compositions.