3440 results about "Styrene" patented technology

The invention discloses an anti-shrinkage light, soft and elastic sole foaming material and a preparation method thereof, and belongs to the technical field of footwear products. The light, soft and elastic sole foaming material is formed by chemically foaming an EVA (Ethylene Vinyl Acetate) composite raw material, the EVA composite raw material is prepared from 50 to 70 parts of EVA, 20 to 40 parts of olefin thermoplastic elastomer, 10 to 20 parts of styrene elastomer, 1.5 to 3 parts of maleic anhydride grafted ethylene-octylene copolymer compatilizer, 0.4 to 0.8 part of peroxide cross-linking agent, 3 to 4 parts of foaming agent, 1 to 1.5 parts of zinc oxide, 1 to 1.5 parts of polyethylene wax substance and 0.5 to 1.5 parts of poly (butylene succinate). 0.3 to 1 part of polyamide 12 microspheres and 2 to 3 parts of nano montmorillonite. The foaming material can resist shrinkage when being used as a shoe sole part, and has good rebound performance and the like, so that the high-quality requirement of sneakers, the mass production stability and the like are met.

The invention discloses a flame-retardant ABS (Acrylonitrile Butadiene Styrene) composition as well as a preparation method and application thereof, and relates to the technical field of high polymer materials. The flame-retardant ABS composition provided by the invention comprises the following components in parts by mass: 50-80 parts of ABS resin; 8 to 12 parts of styrene-acrylonitrile copolymer; 3 to 5 parts of styrene-acrylonitrile-maleic anhydride terpolymer; 2 to 6 parts of a fluorine-containing maleimide copolymer; 5 to 15 parts of graphite nanosheet modified high rubber powder; 12 to 18 parts of brominated flame retardant; 3-7 parts of a phosphorus-based flame retardant; 0.1-1 part of a processing aid; the phosphorus-based flame retardant is prepared from the following components in parts by mass: 80 to 95 parts of diethyl phosphinate; 0.3 to 3 parts of ethyl butyl phosphinate; 0.1 to 2 parts of ethyl phosphonate; and 5 to 20 parts of melamine polyphosphate. The flame-retardant ABS composition prepared by the invention is good in flame retardant property, good in welding strength and low in cost.

The invention discloses a method for synthesizing electronic-grade ethyl acetate through catalytic esterification of acidic ion exchange resin, and belongs to the technical field of ethyl acetate preparation. The method comprises the following steps: mixing crosslinked polystyrene white balls and a swelling agent, and dropwise adding concentrated sulfuric acid for reaction to obtain S-PS resin; mixing an EDTA disodium salt saturated solution and a polyacrylic acid solution, adding a cross-linking agent and an emulsifier, and carrying out a cross-linking curing reaction to obtain EDTA microcapsules; the preparation method comprises the following steps: dispersing S-PS resin in a solvent, adding EDTA microcapsules, a dehydration condensation agent and a catalyst, reacting under the protection of inert gas, and filtering and recovering after the reaction is finished to obtain S-PS-EDTA resin; mixing glacial acetic acid, absolute ethyl alcohol and S-PS (at) EDTA resin for reaction, and filtering and collecting liquid after the reaction is finished; and rectifying the collected liquid to obtain the product. According to the method provided by the invention, metal impurities can be chelated in the synthesis process, and the electronic-grade ethyl acetate with high purity and low impurity content is produced.

The invention relates to the technical field of polymer photoelectric materials, in particular to a preparation method of a supramolecular gel electrolyte. The method comprises the following steps: esterifying tetraphenylethylene alcohol and methacryloyl chloride to form tetraphenylethylene methacrylate, and performing staged linear heating polymerization on the tetraphenylethylene methacrylate, 3-(methacrylamido) propyl dimethyl 3-thiopropyl ammonium oxide inner salt, acrylic acid, tetraphenylethylene methacrylate and 4-vinylpyridine under the action of ammonium persulfate to obtain a tetraphenylethylene copolymer. And finally, soaking in a lithium chloride aqueous solution to obtain the supramolecular hydrogel electrolyte. The hydrogel obtained by the invention has high mechanical strength and high ionic conductivity, and is suitable for energy storage devices such as flexible supercapacitors and the like.

The invention discloses a method for degrading polystyrene (PS) plastic and upgrading and recycling the PS plastic into benzoic acid based on nano MnO2 photocatalytic ozonation, and belongs to the technical field of solid waste recycling. The method comprises the following steps: firstly, mixing PS plastic fragments with nano MnO2 and an organic solvent, then simultaneously introducing ozone into a reaction system at normal temperature and normal pressure, and irradiating with light. Through synergistic catalysis of light and ozone, molecular chains of the PS plastic can be efficiently and selectively broken and oxidized, and finally the PS plastic is directionally converted into benzoic acid with high additional value. After the reaction is finished, a benzoic acid product can be obtained through simple separation, concentration and purification steps. The method provided by the invention realizes high-valued recycling of the waste PS plastic under mild conditions, solves the problems of high energy consumption, complex products, easy generation of secondary pollution and the like in a traditional treatment method, and has the outstanding advantages of green process, efficient reaction, high product value and the like.

The invention discloses unsaturated polyester resin for an optical cable reinforcing core and a preparation method thereof, and belongs to the technical field of unsaturated polyester resin. The composition is composed of the following components: PG, IPA, a catalyst, maleic anhydride, AA, styrene, an antioxidant, a first polymerization inhibitor, a second polymerization inhibitor and a third polymerization inhibitor. The ratio of alcohol to acid is (1.08-1.12): 1; the activity is (3.4-3.8): 1; the molar ratio of AA to IPA is 1: (12-16); the preparation method comprises the following steps: 1) uniformly mixing propylene glycol, a catalyst and isophthalic acid; 2) raising the temperature, preserving the heat and raising the temperature again; cooling, sequentially adding a first polymerization inhibitor, maleic anhydride and adipic acid, heating, keeping the temperature, and heating again; 3) cooling and adding a second polymerization inhibitor, and 4) cooling and adding styrene, a third polymerization inhibitor and an antioxidant, uniformly mixing, and cooling to less than or equal to 60 DEG C to obtain the unsaturated polyester resin for the optical cable reinforcing core. The unsaturated polyester resin for the optical cable reinforcing core has the characteristics of high bending strength and high temperature resistance.

The invention relates to polystyrene cation exchange resin as well as a preparation method and application thereof. The preparation method comprises the following steps: dissolving a dispersing agent in a solvent to obtain a dispersed phase for suspension polymerization reaction, uniformly mixing a reaction monomer, a cross-linking agent, a pore-foaming agent and an initiator, and carrying out suspension polymerization reaction under segmented stirring and segmented temperature change to prepare copolymer microspheres; and putting the dried microspheres into a reaction kettle, swelling, carrying out sulfonation reaction through a variable temperature program on the basis to obtain sulfonated microspheres, and carrying out alkali exchange reaction on the sulfonated microspheres to obtain the final product cation exchange resin. Compared with the prior art, the cation exchange resin preparation method provided by the invention has the characteristics of simple and feasible process, easiness in large-scale production, low cost, high specific surface area, high adsorption capacity and high separation efficiency, and is especially suitable for separating and purifying substances containing amino groups or aminoglycosidic bonds.

The invention relates to the technical field of macromolecules, in particular to a ceramic flame-retardant PC / ABS alloy material and a preparation method thereof. Comprising the following raw materials in parts by weight: 55-65 parts of polycarbonate, 30-40 parts of an acrylonitrile-butadiene-styrene copolymer, 0.1-1 part of a compatilizer, 0.1-1 part of a flexibilizer, 1-10 parts of ceramic powder, 3-8 parts of an inorganic composite nano filler, 1-10 parts of a flame retardant, 0.1-1 part of a silane coupling agent and 0.1-0.5 part of an antioxidant. The preparation method of the ceramic flame-retardant composite material mainly comprises the following steps: drying the raw materials, uniformly mixing the raw materials, processing and extruding, and carrying out injection molding, and by adopting the synergistic effect of the ceramic powder and the flame retardant, the PC / ABS alloy material is endowed with excellent flame retardance while good mechanical properties of the PC / ABS alloy material are ensured.

The invention discloses a silane-crosslinked low-smoke halogen-free flame-retardant oil-resistant polyolefin cable material and a preparation method thereof. The method comprises the following steps: preparing a bio-based polyesteramide toughening phase which is pre-polymerized by castor oil-based polyamide and poly (butylene adipate-co-terephthalate) and is terminated by itaconic anhydride; the preparation method comprises the following steps: self-assembling phytic acid and melamine to wrap ammonium polyphosphate, so as to prepare supramolecular flame-retardant gel powder; the method comprises the following steps: grafting aramid pulp fibers by using a phosphorus-containing silane coupling agent to prepare a reactive liquid crystal reinforced phase; the preparation method comprises the following steps: blending and banburying the components with a hydrogenated styrene-isoprene-styrene block copolymer, an antioxidant and a peroxide cross-linking agent, carrying out dynamic vulcanization and interface bonding, and carrying out extrusion and electron beam irradiation to finally crosslink. An interpenetrating-topology network structure is formed in the prepared cable material, the crosslinking degree is larger than or equal to 82%, and the cable material is rapid in crosslinking, excellent in oil resistance, low in smoke and free of toxicity and is particularly suitable for super high-rise building hanging cables, deep sea exploration cables and new energy automobile liquid cooling cables.

The invention belongs to the technical field of high polymer materials, and particularly relates to a lightweight high-strength expandable polystyrene material and a preparation method thereof. The high-temperature-resistant foaming material is prepared from the following components in parts by weight: 90 to 100 parts of styrene, 200 to 250 parts of deionized water, 0.3 to 0.6 part of a dispersing agent, 1.5 to 2.5 parts of a nucleating agent, 0.2 to 0.6 part of an initiator, 0.2 to 0.5 part of a particle size regulator, 4 to 7 parts of a foaming agent and 3 to 6 parts of composite filler, the composite filler is prepared by mixing modified graphene and modified silicon dioxide; the modified graphene is maleic anhydride copolymer sulfonate modified graphene, and the modified silicon dioxide is polydopamine / carboxymethyl cellulose modified silicon dioxide; the water dispersibility and interfacial compatibility of the composite filler are remarkably improved in a physical and chemical grafting manner, and the mechanical property, thermal stability and flame retardance of the polystyrene material are synchronously optimized by utilizing a multi-component synergistic effect.

The invention relates to the field of building materials, and discloses high-toughness and high-energy-absorption polymer emulsion modified mortar and a preparation method thereof, and the mortar is composed of ordinary Portland cement, river sand, a polymer emulsion, water, an active admixture and chopped fibers. Wherein the polymer emulsion is selected from styrene-acrylic emulsion (SBR), ethylene-vinyl acetate (EVA), polyurethane emulsion or a combination thereof; the mixing amount is 5-20wt% of the mass of the cementing material. According to the invention, a viscoelastic network is formed in a cement matrix through the polymer emulsion, and the synergistic effect of the active admixture and the chopped fibers is combined, so that the bonding strength, the crack resistance, the impact resistance and the stress wave dissipation capability of the mortar are remarkably improved. Test results show that the mortar provided by the invention is obviously superior to ordinary mortar in the aspects of 28d breaking strength, impact toughness and stress wave attenuation performance, and is suitable for high-performance constructional engineering and protective engineering.

The invention relates to the field of sealing materials, in particular to a butyl rubber sealing material and a preparation method thereof. Comprising the following components in parts by weight: 50-70 parts of butyl rubber, 30-50 parts of a brominated isobutylene-p-methylstyrene copolymer, 30-50 parts of carbon black, 8-12 parts of an alkyl phenolic resin vulcanizing agent, 3-5 parts of zinc oxide, 1-3 parts of stearic acid, 1-3 parts of an anti-aging agent and 5-10 parts of a plasticizer. The butyl rubber provides ideal air tightness and heat aging resistance, bromine atoms are introduced into the brominated isobutylene-p-methylstyrene copolymer, co-vulcanization with the butyl rubber is achieved, it is ensured that a uniform and stable co-crosslinking network can be formed between the two rubber molecules, and the service life of the rubber is prolonged. The alkyl phenolic resin vulcanizing agent can form a C-C bond with high bond energy with two rubber molecules, so that the thermal aging resistance of the butyl rubber sealing material is effectively improved, the compression set is reduced, and the butyl rubber sealing material with excellent performance is prepared.

The invention provides a flexible switching production method and equipment for low cis-polybutadiene rubber (LCBR), solution polymerized styrene-butadiene rubber (SSBR) and hydroxyl-terminated liquid polybutadiene rubber (HTPB), the flexible switching production equipment comprises an initiator production device and a polymerization unit, and the flexible switching production method comprises the following steps: mixing cyclohexane and n-hexane according to a volume ratio of 6.5: 3.5-7: 3, adding an initiator, and stirring to obtain a mixture; forming a mixed solvent; the method comprises the following steps: adding a monomer, an active agent, an initiator and a mixed solvent into a polymerization kettle 31 of a polymerization unit, and carrying out polymerization reaction to obtain a low-cis-polybutadiene, solution polymerized styrene-butadiene or hydroxyl-terminated liquid polybutadiene rubber solution; a novel protection initiator tert-butyl dimethyl siloxy propyl sodium is designed, and hydroxyl-terminated liquid polybutadiene rubber with a controllable structure is prepared through anionic living polymerization. According to the process, shutdown for kettle cleaning is not needed, the low cis-polybutadiene, the solution polymerized styrene-butadiene and the hydroxyl-terminated liquid polybutadiene rubber can be produced on the same polymerization device in a flexible switching manner, and the overall production efficiency is improved.

The invention discloses a high-strength and high-resilience TPE (thermoplastic elastomer) and a preparation method thereof in the technical field of high polymer materials, and the elastomer is prepared by taking a hydrogenated styrene block copolymer as a matrix and matching with a polyolefin rigid phase, plasticizing oil and a specific additive. The method is characterized in that two self-made reaction type modifiers are introduced, wherein one self-made reaction type modifier is a core-shell nano reinforcing agent containing an epoxy functional group and polyhedral oligomeric siloxane, and the other self-made reaction type modifier is a furan maleimide bifunctional dynamic cross-linking agent. The nano reinforcing agent is prepared through silane hydrolysis and amination reaction, and can react with a matrix for grafting, so that the strength and creep resistance of the material are remarkably improved; the dynamic cross-linking agent is synthesized through step-by-step isocyanate addition reaction, a cross-linked network can be reversibly formed in the processing process, and the material is endowed with extremely high rebound resilience and low permanent deformation. The obtained product has high strength, high resilience and excellent processability, and is especially suitable for high-end fitness equipment.

The application discloses a kind of flame-retardant expandable polystyrene and its preparation method.It includes the following raw materials: styrene, nucleating agent, desalted water, organic compound containing peroxide functional group, inorganic salt, bromine flame retardant, dispersant, solvent.The product powder and bulk material prepared by the application are less, and the prepared polystyrene board has excellent mechanical properties.After one week or even one month, no collapse, deformation and other phenomena occur, the combustion performance completely reaches B level, and has efficient flame-retardant fireproof performance.Meanwhile, the product obtained by the application has high bromine content, good thermal stability, low bleeding, no toxicity, little influence on material mechanical properties, and no toxic gas such as polybrominated dibenzo-p-dioxin and polybrominated dibenzofuran is produced during thermal cracking or combustion, which completely meets the requirements of European dioxin regulations and does not harm the environment.

The invention relates to the technical field of tire rubber manufacturing, and discloses an EV tire tread rubber composition adapting to low temperature and a mixing method thereof. According to the invention, the high-vinyl solution polymerized styrene-butadiene rubber A, the low-glass transition temperature solution polymerized styrene-butadiene rubber B and the lithium-series cis-butadiene are matched to form a rubber substrate, and the high-dispersion white carbon black, the bio-based filling oil and the high-proportion wet-skid-resistant resin are matched, so that the matching amount of various raw materials is strictly controlled; and the rolling resistance of the tire at low temperature is effectively reduced while the gripping performance of the tire is ensured.

Disclosed in the present invention is a composition for preparing a vinyl block copolymer, the composition comprising: a first monomer ethylene, a second monomer a C3-C20 α-olefin and at least one regulation monomer, the regulation monomer being an olefin or a substituted olefin with the C atom number greater than 3, or styrene / a styrene derivative, and in the same composition, the second monomer being different from the regulation monomer. The composition is catalyzed by a main catalyst and a co-catalyst to obtain the vinyl block copolymer, wherein the main catalyst is a complex L-MR1R2R3 that contains three substituents and that is formed by an IVB-group metal and a monoanionic ligand, and the co-catalyst includes alkyl aluminum, polymerized or oligomerized aluminoxane, a neutral Lewis acid, a non-polymer, a non-coordinated ionic compound, or a mixture of two or more described above. Provided in the present invention is a composition capable of obtaining a lower-olefin block copolymer, the composition can obtain a lower-olefin block copolymer without the need of replenishing monomers or adding a chain transfer reagent for polymerization during polymerization processes, so that a production process is simple and involves low cost.

The invention relates to a renewable industrial flue gas carbon dioxide adsorbent and a preparation method thereof. The method comprises the following steps: S1, mixing alkali metal, an aluminum oxide precursor, silicon oxide and a first solvent, or mixing an alkali metal solution, the aluminum oxide precursor, the silicon oxide and an optional second solvent, and then molding the mixed material to obtain microsphere particles; s2, mixing the microsphere particles and organic amine, and carrying out first loading treatment and drying treatment to obtain an organic amine loaded material; s3, roasting the organic amine-loaded material, mixing the obtained roasted material with a carrier material, and carrying out second loading treatment, so as to obtain the carbon dioxide adsorbent, the carrier material is selected from at least one of polystyrene-polyacrylic acid-polyethylene oxide, polymethyl methacrylate-b-polystyrene, zirconium oxide and a porous ceramic material. The carbon dioxide adsorbent is relatively high in adsorption capacity and relatively good in selectivity, reproducibility and stability; and large-scale industrial production and application are facilitated.

The application discloses a PAG bonding type photosensitive photoresist resin and a preparation method and application thereof. The photoresist resin is as follows: formula. The PAG bonding type resin is prepared through the following reaction process: 1) performing a RAFT polymerization reaction on p-acetoxystyrene, p-styrene sulfonamide trifluoromethyl potassium salt and a RAFT chain transfer agent under the action of an initiator to obtain an intermediate I, 2) performing a hydrolysis reaction on the intermediate I to obtain an intermediate II, 3) performing a protection group introduction reaction on the intermediate II and di-tert-butyl dicarbonate to obtain an intermediate III; and 4) performing an ion exchange reaction on the intermediate III and triphenylsulfonium bromide. The application realizes the bonding of the PAG into the resin skeleton, and improves the problems of poor compatibility between the PAG and the resin, phase separation, uneven distribution of the PAG and the like. Therefore, the photoresist prepared from the resin has the photo-generated acid bound by the polymer main chain and limited diffusion, the resolution is improved, and the photoetching effect is excellent.

The invention discloses an alkali-resistant seal primer for a building outer wall. The alkali-resistant seal primer is prepared from the following components in parts by weight: 30-45 parts of modified styrene-acrylic emulsion, 10-20 parts of waterborne epoxy resin emulsion, 8-15 parts of modified nanoscale alkali-resistant filler, 8-12 parts of a composite sealing agent, 1-3 parts of a dispersing agent, 0.5-1.5 parts of a defoaming agent, 2-5 parts of a coalescing agent, 0.1-0.5 part of a pH regulator and 15-25 parts of deionized water. A basic membrane material is constructed through a compound system of the modified styrene-acrylic emulsion and the epoxy resin emulsion, so that the adhesive force and the weather resistance of the membrane material are improved; by combining the synergistic effect of the modified nano-scale alkali-resistant filler, the dispersity and the alkali-resistant long-term effect are enhanced; due to the deep sealing effect of the composite sealing agent, the alkali-resistant durability and the sealing performance of the primer are remarkably improved. The building exterior wall alkali-resistant seal primer has excellent alkali-resistant durability, sealing performance, weather resistance and adhesive force, and meets the sealing treatment requirements of various building exterior wall base layers.

The invention discloses a foamed polyphenyl ether bead and a preparation method thereof. The material is prepared by compounding polyphenyl ether, a styrene polymer, a three-dimensional fiber microsphere reinforcement, a CNTs coated SiO2 core-shell nucleating agent, modified resin, a flame retardant and an antioxidant according to a specific ratio. The innovation of the invention lies in that a three-dimensional reinforcement with glass beads as a core and carbon fibers as a network and a composite foaming agent with silicon dioxide coated with carbon nanotubes are introduced to synergistically improve the cellular structure and mechanical properties. The preparation process comprises the key steps of component drying, melt blending granulation, carbon dioxide physical foaming under an autoclave aqueous dispersion system and the like. Through component design and surface modification, the foamed bead has the advantages of light weight, high strength, flame retardance and uniform foam structure, and is suitable for the fields of high-end heat insulation and bearing.

The invention relates to a thermoplastic molding composition (P) comprising: (A) thermoplastic polymer composition (A) comprising: (A-1) 10 to 50 wt.-% of graft copolymer (A-1), (A-2) 1 to 50 wt.-%, of thermoplastic polymer matrix (A-2) based on one or more vinylaromatic copolymers, (A-3) 20 to 50 wt.-%, of polymerized alkyl methacrylate component (A-3), and (A-4) 0 to 45 wt.-% of comonomer which is copolymerized with the at least one polymerized alkyl methacrylate component (A-3), where the sum of (A-1), (A-2), (A-3) and optional comonomers (A-4) is 83.2 to 99.8 wt.-%; (B) a hindered amine light stabilizer composition (B), comprising at least two of substances (B-1) to (B-3): (B-1) 0 to 0.9 wt.-%, of at least one hindered amine light stabilizer having a dipiperidine structure with at least one alkyl group at each of the 2 and 6 positions of the dipiperidine structure (B-2) 0 to 0.9 wt.-%, of a hindered amine light stabilizer mixture having a monopiperidine structure with at least one alkyl group at each of the 2 and 6 positions of the monopiperidine structure, and (B-3) 0 to 2 wt.-%, of at least one hindered amine light stabilizer having a polymeric structure comprising piperidine groups with at least one alkyl group at each of the 2 and 6 positions of the piperidine groups (C) 0 to 5 wt.-%, of one or more further additives (C), different from (B); and (D) 0 to 10 wt.-%, of colorants, dyes and / or pigments (D), different from (C); wherein the constituents (A) to (D) sum up to 100 wt.-% of the molding composition (P).

The invention relates to the technical field of grinding fluid, in particular to efficient grinding fluid for an MPO connector, a preparation method and application of the efficient grinding fluid for the MPO connector. 27%-44% of alpha-aluminum oxide; 8%-15% of a styrene-maleic anhydride copolymer; 2%-5% of a modified polyurea solution; 0.05% to 0.3% of perfluoropolyether; 0.5%-2% of citric acid; 0.5%-1.5% of a polyether modified polysiloxane defoaming agent; by adopting a composite abrasive material system of the nano-diamond and the alpha-aluminum oxide, the grinding efficiency and the surface quality are improved in a breakthrough manner.

The invention relates to the technical field of high polymer material modification, in particular to a top whitening resistant polypropylene composite material as well as a preparation method and application thereof. The top whitening resistant polypropylene composite material is prepared from the following components in parts by weight: 60 to 80 parts of polypropylene resin, 20 to 30 parts of talcum powder, 5 to 15 parts of hydrogenated styrene-butadiene-styrene block copolymer, 0.1 to 0.5 part of beta crystal form nucleating agent, 3 to 8 parts of maleic anhydride grafted polypropylene, 0.3 to 1 part of composite antioxidant and 0.5 to 2 parts of zinc stearate. Through the synergistic effect of the hydrogenated styrene-butadiene-styrene block copolymer toughening system and the beta crystal form nucleating agent in a specific formula, high rigidity (the filling amount of talcum powder reaches 20-30 parts) is kept, and meanwhile, the top whitening resistance of the composite material is remarkably improved; the method is suitable for parts such as automobile dashboards and door plates which have strict requirements on surface quality.

The invention relates to the technical field of foaming materials, in particular to a shoe material preparation process for finished shoes based on supercritical physical foaming and the finished shoes. The preparation method comprises the following steps: 1) weighing a matrix, octadecyl polyhedral oligomeric silsesquioxane, an active group-containing styrene-acrylonitrile copolymer, a polydimethylsiloxane block copolymer, an epoxy functional group-containing olefin copolymer, a nano silicon dioxide dispersion and a processing aid, uniformly mixing, blending, extruding, granulating and drying to obtain a blended material, wherein the matrix, the octadecyl polyhedral oligomeric silsesquioxane, the active group-containing styrene-acrylonitrile copolymer, the polydimethylsiloxane block copolymer, the epoxy functional group-containing olefin copolymer, the nano silicon dioxide dispersion and the processing aid are mixed uniformly; the preparation method comprises the following steps of (1) preparing a polymer, (2) plasticizing the blended material to form a preformed blank, injecting supercritical gas, and fully dissolving the supercritical fluid in the polymer at the temperature of 150-180 DEG C and the pressure of 10-20MPa for 1-3 hours, (3) reducing the pressure to normal pressure within 10 seconds at the pressure reduction rate of less than or equal to 2MPa / s, and (4) cooling and shaping at the temperature of 60-80 DEG C to obtain the shoe material.

The invention relates to the technical field of organic high-molecular compound synthesis, in particular to a modified ABS material diffusion plate and a preparation method thereof.The preparation method comprises the steps that dried ABS resin and acrylonitrile-butadiene-styrene copolymer are mixed to prepare a modified ABS base material; mixing organic silicon microspheres and nano barium sulfate to obtain a modified light diffusion agent; judging that the modified light diffusant is unqualified by comparing the refractive index absolute difference between the modified light diffusant and the modified ABS base material, and performing modification compensation; a titanate coupling agent is determined to be adopted for modification according to the content of inorganic particles of the modified light diffusion agent; mixing the modified light diffusant with an antioxidant system, an ultraviolet protective agent and a processing aid to obtain a functional additive; and mixing with a modified ABS (Acrylonitrile Butadiene Styrene) base material, and extruding by using a twin-screw extruder to Through multi-parameter feedback and accurate compensation control, the problems that the compatibility of the modified light diffusion agent and the base material is poor and the stability of the machining process is insufficient are effectively solved.

The invention relates to a high-strength self-cleaning infrared radiation heat dissipation water-based coating as well as a preparation method and application thereof. The coating comprises the following components in parts by weight: 40-55 parts of water, 5-10 parts of a water-based binder, not more than 20 parts of a high-emissivity filler and not more than 5 parts of a fluorocarbon surfactant, the water-based binder is selected from at least one of styrene-acrylic emulsion, water-based polyurethane, polyvinyl alcohol, water-based acrylic resin, water-based epoxy resin and water-based alkyd resin, and the fluorocarbon surfactant is selected from at least one of water-based acrylic emulsion, water-based polyurethane, polyvinyl alcohol, water-based acrylic resin, water-based epoxy resin and water-based alkyd resin. The high-emissivity filler is selected from at least one of BaSO4, ZnO, Al2O3, SiC, BN (boron nitride) and SiO2, and the fluorocarbon surfactant is selected from at least one of FS-65, FS-34, ST-110, FC-4432 and FS-3100. According to the invention, ZnO, BaSO4 and the like are introduced as composite fillers, so that the coating is endowed with high strength, self-cleaning property and full-wave-band high emissivity, various properties such as wear resistance, adhesion, acid and alkali resistance, organic solvent corrosion resistance, aging resistance, high and low temperature resistance and the like of the coating are improved, and the coating can meet the requirements of various different heat dissipation scenes when being applied to electronic components.

The present application relates to the technical field of resin coating, and particularly relates to a preparation method of modified acrylic resin and application thereof, which comprises the following steps: firstly, hydrolysis and condensation of multiple organosilicon alkoxyl monomers, then grafting with epoxy resin to obtain organosilicon-epoxy resin containing vinyl; subsequently, under the protection of nitrogen, a premixed solution of styrene, multiple acrylate monomers, initiator and solvent is added dropwise into a reaction kettle containing the resin, and after polymerization by staged heat preservation, parameters are adjusted to obtain the modified acrylic resin. The resin has a ternary hybrid structure of acrylic acid, epoxy and organosilicon through grafting, condensation and copolymerization, and has good film forming property, high adhesion, excellent high temperature resistance and flexibility. The coating prepared by using the resin can realize normal temperature self-drying, and the coating layer is dense and smooth, has strong adhesion, good corrosion resistance and impact resistance, and can withstand high temperature and cold cycle, and is suitable for protection of parts which need long-term high temperature and corrosion resistance.

The invention relates to the technical field of hot-melt pressure-sensitive adhesives, in particular to a hot-melt pressure-sensitive adhesive special for instillation type coating and a preparation method of the hot-melt pressure-sensitive adhesive. The hot-melt pressure-sensitive adhesive is prepared from the following raw materials in parts by mass: 25 to 35 parts of styrene block copolymer, 40 to 50 parts of tackifying resin, 20 to 30 parts of plasticizer and 0.1 to 0.5 part of antioxidant. Wherein the styrene block copolymer is preferably compounded from S-1528, 4411ND and 6241A, the tackifying resin is preferably hydrogenated rosin glyceride with the softening point of 85-90 DEG C, and the plasticizer is medical white oil. The 180-degree peel strength of the prepared product is larger than 5.0 N / 25 mm, the 180-degree viscosity is 2000-6500 cps, the instillation precision can reach + / -8 microns, and the product has excellent adhesive performance and process adaptability and is suitable for instillation type coating scenes.

A magnetic toner comprising a toner particle comprising a binder resin and a magnetic body, wherein the binder resin comprises a styrene-acrylic resin, the styrene-acrylic resin comprises a monomer unit represented by Formula (1):where, in Formula (1), R1 represents a hydrogen atom or a methyl group; and R2 represents a linear alkyl group having CB carbon atoms, CB being an integer from 10 to 15; the magnetic body comprises an alkyl group having CM carbon atoms, on a surface of the magnetic body, CM being an integer from 4 to 20; CB and CM satisfy Formula (3):|CM−CB|≤10  (3), andin a cross-sectional observation of the magnetic toner using a transmission electron microscope, a coefficient of variation of an occupied area ratio of the magnetic body in a specific square grid, is 80.0% or lower.