82 results about "Butyl acrylate" patented technology

The application discloses a polypropylene woven bag and a preparation method thereof. The polypropylene woven bag is woven by a woven material, and the woven material comprises the following components in parts by weight: polypropylene 90-110 parts, alumina whisker 8-12 parts, carbon nanotube with surface modified polydopamine 0.5-1 part, calcium stearate lubricant 0.5-1 part, ethylene-butyl acrylate-maleic anhydride terpolymer compatibility agent 5-10 parts, and antioxidant 0.3-0.6 part. The preparation method comprises the following steps: adding the components of the woven material into a high-speed mixer, and mixing to obtain a mixture; feeding the mixture into an extruder, and performing melting extrusion, cooling, stretching and setting to prepare polypropylene flat filaments; cross-weaving the polypropylene flat filaments into woven cloth, performing pattern printing on the surface of the woven cloth, and then sequentially performing cutting, sewing or bonding to seal the bottom, so that the polypropylene woven bag is prepared. The polypropylene woven bag obtained by the method has excellent wear resistance and good toughness.

The application relates to the technical field of refining of acyclic compounds, and discloses a gradient temperature control method for a n-butyl acrylate refining process, which comprises the following steps: adding a polymerization inhibitor component to a crude product, obtaining a light-removing material through preliminary rectification; adjusting the pressure of a heated area and introducing oxygen-containing micro-bubble flow to maintain the free radical quenching activity in the liquid phase boundary layer; and based on the current increment of a wiped film driving current, adjusting the shear strength in real time, physically destroying the fluid viscous structure to lock the liquid film thickness distribution, solving the bottleneck that the polymerization inhibition fails due to the dissolution oxygen resolution under an extremely low pressure environment, realizing deep coupling of chemical inhibition and phase change mass transfer through the synergy of physical disturbance generated by micro-bubble expansion and rupture and an in-situ compensation mechanism of oxygen molecules, eliminating the risk of coking on a heated surface from a bottom logic, and guaranteeing the chemical stability of a monomer recovery process.

This invention belongs to the field of packaging and printing materials, specifically relating to a high-temperature resistant water-based micro-crosslinked transfer coating. The raw materials for this high-temperature resistant water-based micro-crosslinked transfer coating consist of the following components: methacrylic acid, N-hydroxymethylacrylamide, butyl acrylate, methyl methacrylate, diallyl phthalate, 1,6-hexanediol diacrylate, tricyclodecanedimethylol diacrylate, trimethylolpropane triacrylate, di(trimethylolpropane)tetraacrylate, potassium persulfate, sodium bicarbonate, alkylphenol polyoxyethylene ether ammonium sulfate, nonylphenol polyoxyethylene ether, deionized water, ethanol, ammonia, wetting agent, defoamer, and film-forming agent. Its beneficial effects include a stable reaction process during the preparation of this high-temperature resistant water-based micro-crosslinked transfer coating, reducing the likelihood of slag formation or explosive polymerization; high gloss in the coating film; good adhesion to vacuum metallization; minimal fogging or whitening; high-temperature molding resistance up to 180℃; and easy peeling of PET film with a high yield.

This invention relates to a fluorosilicone-modified acrylic resin and its preparation method, belonging to the field of polymer materials technology. The resin uses methyl methacrylate, butyl acrylate, and hydroxyethyl methacrylate as basic monomers. Fluorine is introduced through copolymerization with tridecafluorooctyl acrylate. A self-made doped silicone modifier is introduced via blending. The doped silicone modifier is modified by the ring-opening and ring-closing reaction of epichlorohydrin with the secondary amine structure of hexamethylcyclotrisilazane, grafting branched active epoxy groups. Subsequently, n-decylamine is used to open the ring with the grafted epoxy groups, introducing terminal long-chain alkyl modification. This modifier exhibits good compatibility with the acrylic polymer chain and acts as a support in the resin, reducing the shrinkage stress after curing and improving the impact resistance of the cured film. Simultaneously, the reduction in micro-shrinkage results in a film with higher gloss and fullness.

The application belongs to the technical field of high polymer materials, and discloses a PP / PA composite material for an automobile front end module and a preparation method thereof. By introducing tackifying resin and fumed silica into a PP / PA resin system to improve polarity, the PP / PA can be fully infiltrated and bonded when impregnated with long glass fibers, better wrap the glass fibers, form a close combination, improve the strength of the composite material, and prevent fiber floating. By introducing an organic-inorganic hybrid heat-resistant agent, the heat aging resistance of the composite material is enhanced. By introducing ethylene-butyl acrylate copolymer, the butyl acrylate ductile segment is used to prevent the glass fibers from being excessively shortened during injection molding processing, and good rigidity, strength and impact toughness are ensured. The obtained PP / PA composite material can provide sufficient tensile strength, impact toughness and high temperature resistance in terms of impact resistance, vibration resistance and heat dissipation when used in the automobile front end module, and promotes the wide application of the material in the lightweight automobile front end module.

The application discloses a n-butyl acrylate condensation recycling water washing system, which comprises a supporting frame and a condensation barrel arranged in the supporting frame; a discharge cylinder is arranged in the condensation barrel, a limiting valve and a spraying piece are arranged in the discharge cylinder, a guide piece is arranged at the bottom end of the discharge cylinder, the output end of the condensation barrel is communicated with the discharge cylinder through the guide piece, an inner cylinder is arranged in the guide piece, and a collecting piece is connected to the bottom end of the inner cylinder; in the application, the mixed liquid is pushed by a piston two driven by a driving rod, so that the substances floating on the upper surface of the mixed liquid overflow into the guide piece, and the water under the liquid surface flows downward through the piston two when the piston two moves upward, and the water is sent into the collecting piece in the process that the piston two moves downward, the floating substances slightly dissolved in water are collected through the guide piece, the water source is recycled and reused, and the consumption of the water source is reduced.

The present application relates to a kind of degradable acrylic pressure sensitive adhesive and its preparation method, belong to acrylic pressure sensitive adhesive technical field.The raw material of degradable acrylic pressure sensitive adhesive provided by the present application includes polylactic acid, butyl acrylate, isooctyl acrylate, benzoyl peroxide, ethyl acetate, temperature-sensitive microcapsule, tackifier, antioxidant and stabilizer.The degradable acrylic pressure sensitive adhesive of the present application is composed of multiple components, the polylactic acid in which not only gives pressure sensitive adhesive good biodegradability, but also provides appropriate mechanical strength and flexibility;The combination of butyl acrylate and isooctyl acrylate makes the pressure sensitive adhesive have excellent adhesion and weather resistance;The introduction of temperature-sensitive microcapsule, tackifier, antioxidant and stabilizer further improves the performance of pressure sensitive adhesive, improves the degradability of pressure sensitive adhesive.

This application relates to the technical field of cables, specifically disclosing a low-smoke halogen-free flame-retardant cable and its preparation method. A low-smoke halogen-free flame-retardant cable includes an outer sheath, a braided layer, and several cable cores. The outer sheath comprises the following raw materials in parts by weight: 25-50 parts of ethylene-butyl acrylate copolymer; 20-40 parts of ethylene propylene diene monomer (EPDM) rubber; 10-30 parts of hydrogenated petroleum resin; 20-40 parts of polyethylene resin; 50-60 parts of aluminum hydroxide; 20-30 parts of magnesium hydroxide; 10-20 parts of synergistic flame retardant; 1-2 parts of paraffin wax; 1-3 parts of imidacloprid; and 2-5 parts of additives. The cable of this application can be used in locations such as nuclear power plants and subway stations, and has advantages such as high flame retardancy, low smoke, and high mechanical strength.

This invention discloses a method for preparing and applying a highly flexible, high-temperature resistant photosensitive resin. The preparation method includes synthesizing an epoxy-containing acrylate resin and a photosensitive resin containing oxazolidinone bonds. A two-step reaction is used to synergistically improve the flexibility and heat resistance of the photosensitive resin: The first step employs RAFT living radical polymerization to precisely control the molecular weight of the acrylate copolymer segments, introducing glycidyl methacrylate to provide side-chain epoxy groups, and adjusting the balance between chain flexibility and rigidity using butyl acrylate and isobornyl ester to obtain a narrowly distributed epoxy-containing acrylate intermediate. The second step utilizes the epoxy group and diphenylmethane diisocyanate to undergo a cyclization addition reaction under a catalyst, generating a highly thermally stable oxazolidinone five-membered heterocyclic structure to impart excellent high-temperature resistance to the resin. The residual isocyanate groups are capped with hydroxy acrylate to introduce photosensitive double bonds, achieving a photosensitive resin with both good adhesion and temperature resistance.

This invention relates to the field of chlorinated polyvinyl chloride (PVC) technology, specifically to a high Vicat softening temperature, high-temperature resistant CPVC pipe and its preparation method. The pipe is obtained by extrusion and heat treatment of a composition containing a specific core-shell type heat-resistant and impact-resistant modifier. The modifier has a multi-layered shell structure with cross-linked polybutyl acrylate as the core and containing gradient-distributed epoxy functional groups. The preparation method includes a stepwise mixing of raw materials and an extrusion process that controls the short residence time of the melt. This invention significantly improves the Vicat softening temperature of the pipe while also achieving excellent impact resistance, internal pressure thermal stability, and long-term thermal aging performance.

The present application relates to the field of high polymer material and its blending modification engineering technology, and in particular to a CPVC alloy material with high heat resistance and high impact strength and a preparation method thereof, aiming to solve the technical problem that the CPVC alloy material in the prior art is difficult to have high heat resistance and high impact strength simultaneously. The alloy material mainly comprises CPVC resin, ASA resin, block copolymer form regulator, crosslinking agent containing reversible dynamic covalent bond, three-layer core-shell structure composite particle, heat stabilizer and antioxidant; a heat-reversible dynamic covalent crosslinking network based on furan group and maleimide group is introduced between the interface of CPVC phase and ASA phase; at the same time, three-layer core-shell structure composite particles with nano-silicon dioxide synthesized by tetraethyl orthosilicate precursor as rigid inner core, polybutadiene-butyl acrylate copolymer as elastomer intermediate layer and styrene-acrylonitrile copolymer as outer shell layer are added to realize efficient stress dissipation.

The application discloses a kind of chemical amplification type positive photoresist and its application, belong to photoetching material technical field.The chemical amplification type positive photoresist includes following mass percentage of each component: polymer resin 5%-20%, photoacid generator 0.05%-1%, basic quencher 0.001%-0.05%, leveling agent 100ppm-1000ppm, solvent is remainder;Wherein the polymer resin includes first copolymer and second copolymer, the polymerized monomer of the first copolymer includes: polycyclic alkyl protected methacrylic ester, long-chain alkyl protected methacrylic ester, alpha-oxygen group protected methacrylic ester and methacrylic acid, the polymerized monomer of the second copolymer includes hydroxyl styrene, styrene and tert-butyl acrylate.By chemical amplification type positive photoresist as described above, the application can make chemical amplification type positive photoresist when using shorter wavelength light source, keep better resolution and higher contrast.

The application discloses a polymer modified epoxy resin coating with perfluorinated branched short chains and a preparation method thereof, butyl acrylate, styrene, maleic anhydride, methyl methacrylate with perfluorinated branched short chains or styrene with perfluorinated branched short chains are placed at 40-60 DEG C, a solvent and an initiator are added after sufficient mixing, and a polymer with perfluorinated branched short chains is obtained after heating reaction. A first solution prepared from the polymer is uniformly mixed with a second solution prepared from an epoxy resin and a curing agent; the mixture is sprayed and gradient temperature curing is carried out, and a polymer modified epoxy resin coating with perfluorinated branched short chains is obtained. The coating improves the wetting performance of the coating surface while ensuring the anticorrosion ability of the coating itself, and changes the coating from hydrophilicity to hydrophobicity.

This invention provides a method for preparing a polymer electrolyte for electrochromic devices. The method includes the following steps: Step 1, mixing raw materials containing 2-hydroxyethyl acrylate monomer, butyl acrylate monomer, and plasticizer to obtain a monomer mixture; Step 2, adding lithium salt, UV curing initiator, and crosslinking agent to the monomer mixture, and mixing evenly to obtain a precursor solution; Step 3, adding a polyether compound as a plasticizing component to the precursor solution, mixing evenly, and then initiating polymerization and crosslinking reactions to form the polymer electrolyte for electrochromic devices with a three-dimensional network structure. This invention significantly reduces the interfacial impedance of electrochromic devices, accelerates the coloring / fading response speed, and greatly extends their cycle life and environmental tolerance, providing a key material basis for the preparation of highly reliable solid-state smart color-changing devices.

The application discloses a preparation method of butyl acrylate. The butyl acrylate is prepared through esterification reaction of raw materials of acrylic acid and n-butanol. The acrylic acid includes acryloyloxypropionic acid, maleic acid and crotonic acid. The mass ratio of the acryloyloxypropionic acid to the maleic acid is 1:0.01-1, and the mass ratio of the crotonic acid to the acryloyloxypropionic acid is 1:5-500. The content of key impurities in the acrylic acid is ensured to be in a specific ratio, and the crude acrylic acid is directly used as a raw material for butyl acrylate production after removal of light components, so that the production cost of the butyl acrylate is greatly reduced, and raw material consumption and energy consumption are reduced. The application is a green and efficient production process.

The application discloses a surface treatment agent and a preparation method and application thereof, and preparation raw materials include 10-40 parts of micron-grade diamond sand and 60-90 parts of an organic treatment agent according to weight parts; preparation raw materials of the organic treatment agent include a silane coupling agent and a surfactant; the silane coupling agent includes at least one of isobutyl triethoxysilane, methyl triethoxysilane, propenyl triethoxysilane and butyl acrylate-based triethoxysilane; and the surfactant includes at least one of sodium dodecyl benzene sulfonate, gamma-aminopropyl trimethoxysilane, epoxy propenyl trimethoxysilane and methyl trimethoxysilane. The application provides a surface treatment agent, the surface treatment agent is sprayed to a concrete surface according to the application scheme, the wear resistance and the anti-cracking performance of the concrete surface are enhanced, a large amount of the surface treatment agent is saved, and the concrete cost is reduced.

The application belongs to the technical field of photoinitiators and preparation methods, and particularly relates to a preparation method of a macromolecular photoinitiator. The macromolecular photoinitiator is prepared from glycidyl methacrylate, methyl methacrylate, butyl acrylate, hydroxyethyl acrylate, 4-benzoylbenzoic acid, 2-carboxythioxanthone, N,N-dimethylglycine, monomethoxypolyethylene glycol, monohydroxypolycaprolactone and methacrylic acid. In the preparation, a tetra-acrylate polymer containing an epoxy group and a hydroxyl group is first prepared, and then double photoinitiation structure grafting, tertiary amine structure grafting, segment grafting and epoxy closure are sequentially performed, and the feeding amount of each stage is corrected through the initial epoxy value, the first residual epoxy value and the second residual epoxy value. The method connects the benzophenone structure, the thioxanthone structure and the tertiary amine structure to the same polymer molecular chain, reduces the content of unreacted small molecules and the migration and precipitation amount, improves the photocuring gel rate and shortens the surface drying time.

This invention discloses a high weather-resistant waterborne polymer emulsion and its preparation method, relating to the field of waterborne polymer emulsion technology. The high weather-resistant waterborne polymer emulsion prepared by this invention is composed of polytetrahydrofuran ether diol, silane-acrylate bifunctionalized polymer, isophorone diisocyanate, methyl methacrylate, butyl acrylate, a polymerizable composite emulsifier, a copolymerizable ultraviolet-absorbing polymer, and additives. The high weather-resistant waterborne polymer emulsion prepared by this invention, after film formation, exhibits strong weather resistance, good water resistance, high adhesion, and non-migration of ultraviolet absorbers, making it suitable for outdoor high-performance protective coating applications.

This invention discloses a highly efficient method for synthesizing proxalutamide intermediates, belonging to the field of pharmaceutical synthesis technology. First, dimethyl malonate and 2-chloro-5-nitropyridine are used as raw materials, condensed in the presence of potassium carbonate to generate dimethyl 2-(5-nitropyridine-2-yl)malonate. This is then reacted with tert-butyl acrylate and acid-hydrolyzed to obtain 4-(5-nitropyridine-2-yl)butyric acid. After activation with N,N'-carbonyl diimidazole, it is coupled with aminoacetaldehyde dimethyl acetal to form N-(2,2-dimethoxyethyl)-4-(5-nitropyridine-2-yl)butyramide. Then, a cyclization reaction mediated by phosphorus pentoxide and methanesulfonic acid is used to generate crude 2-(3-(5-nitropyridine-2-yl)propyl)oxazole. After purification, the nitro group is reduced by catalytic hydrogenation, and finally, it reacts with 1,5-naphthalenedisulfonic acid to form a salt, yielding the proxalutamide intermediate. This method achieves highly efficient synthesis of proxalutamide intermediates.

The application relates to the technical field of nano composite emulsion, in particular to a self-cleaning nano composite emulsion and a preparation method and application thereof, and the preparation raw materials comprise a vinyl functionalized SiO2 nano dispersion liquid, a functionalized alginic acid salt, a vinyl monomer, an initiator, an emulsifier and deionized water; according to weight parts, the preparation raw materials of the vinyl functionalized SiO2 nano dispersion liquid comprise tetraethyl orthosilicate 1-2 parts, ammonia water 0.01-0.02 parts, ethanol 20-30 parts, deionized water 4-6 parts and a silane coupling agent 0.5-0.6 parts; the vinyl monomer comprises butyl acrylate and methyl methacrylate, and the mass ratio of the butyl acrylate to the methyl methacrylate is (70-80):(20-30). The nano composite emulsion provided by the application simultaneously shows excellent effects in terms of hydrophilicity, optical performance, adhesion and stain resistance, and solves the pain points of mutual exclusion of existing coating performances.

This application discloses a PVC resin composition for surface coating, its preparation method, and its application, belonging to the field of polymer materials technology. The composition comprises the following components by weight: 100 parts of polyvinyl chloride resin; 2-5 parts of ASA adhesive powder; 3-6 parts of ionic liquid; 0.5-2 parts of lubricant; 1.5-2 parts of processing aid; 3-5 parts of heat stabilizer; and 3-8 parts of impact modifier. The ionic liquid is selected from at least one of 1-hexyl-3-methylimidazolium tetrafluoroborate and 1-(3-sulfopropyl)caprolactam-p-toluenesulfonate. The ASA adhesive powder has a core-shell structure, with the core being butyl acrylate copolysilicon and the shell being SAN. This application, through the compounding and synergistic effect of a specific ionic liquid and ASA adhesive powder, enables the resulting resin composition to simultaneously achieve excellent comprehensive properties such as strong coating adhesion, high surface smoothness, and good high-temperature dimensional stability when used for coating the surface of a substrate film, effectively solving the technical problem that traditional PVC coating materials cannot simultaneously achieve multiple key properties.

This invention relates to the field of pressure-sensitive adhesive products, specifically a high-speed computer embroidery double-sided tape and its preparation method. The tape includes an acrylate pressure-sensitive adhesive layer, which is prepared from raw materials comprising the following parts by weight: soft monomer components: 10-20 parts butyl acrylate, 20-35 parts isooctyl acrylate; hard monomer components: 1-5 parts methyl methacrylate, 1-3 parts methyl acrylate, 3-5 parts vinyl acetate; functional monomer components: 1-3 parts acrylic acid, 1-3 parts hydroxyethyl acrylate; solvent 60-100 parts, initiator 0.2-0.8 parts, chain transfer agent 0.01-0.1 parts, tackifying resin 5-15 parts, and curing agent 0.5-2 parts; the softening point of the tackifying resin is 80-120℃. By comprehensively optimizing the product formulation system, the provided tape fully adapts to the application needs of the high-speed computer embroidery industry across all scenarios.

This invention discloses a high-temperature resistant oil-resistant polyolefin material for motor wiring and its preparation method. It comprises the following components in parts by weight: 15-18 parts ethylene butyl acrylate; 20-25 parts high-density polyethylene; 10-12 parts graft compatibilizer; 40-50 parts flame retardant; 1.5-2.5 parts lubricant; 2.5-3.0 parts antioxidant; 0.5-0.8 parts antioxidant; 0.7-0.9 parts copper inhibitor; and 1-2 parts crosslinking agent. The ethylene butyl acrylate has a butyl acrylate content of 6-20%; the high-density polyethylene has a melt index of 0.1-0.5 g / 10 min; and the graft compatibilizer is maleic anhydride-grafted POE with a POE content ≥95%. By selecting specific ethylene butyl acrylate, high-density polyethylene, and graft compatibilizer and mixing them with other components in a certain proportion, the final polyolefin material exhibits excellent control over its expansion dimensions in high-temperature oil.

The application belongs to the technical field of pharmaceutical excipients, and particularly relates to a methyl methacrylate-butyl methacrylate copolymer and a preparation method thereof; the monomer molar ratio of methyl methacrylate to butyl methacrylate in the copolymer is about 1:2.5-1:3.4, and the butyl methacrylate-methyl methacrylate copolymer has the following structure. The butyl methacrylate-methyl methacrylate copolymer with better adhesion and higher stability is prepared by limiting the monomer ratio, molecular weight and viscosity of the copolymer; and the preparation method of the butyl methacrylate-methyl methacrylate copolymer has the comprehensive advantages of high heat dissipation efficiency, excellent product form and simple post-treatment.

The application discloses a Z-type four-arm RAFT superdispersant and a preparation method and application thereof. The superdispersant is constructed by sequentially introducing monomers such as N-vinyl pyrrolidone, methoxy polyethylene glycol acrylate and butyl acrylate into a Z-type four-functional macromolecular RAFT reagent as a core through a RAFT controlled polymerization technology to form an amphiphilic block copolymer. In addition, monomers such as styrene, methyl methacrylate and acrylic acid can be selected and combined to optimize the performance of the dispersant. The four-arm superdispersant can be efficiently adsorbed on the surface of pigment particles due to the multi-anchor point structure, so that the grinding efficiency and dispersion stability are significantly improved; the hydrophilic polyethylene glycol segment inhibits particle agglomeration through a steric hindrance effect, and the hydrophobic block enhances the interfacial bonding force with the pigment. Further, the pigment after grinding is coated with styrene to form a dense polymer layer, so that the ink has excellent rheological properties and storage stability.

This invention relates to the field of coatings and adhesives, specifically disclosing a method for preparing and applying a high-toughness, water-based, environmentally friendly emulsion. The emulsion is composed of butyl acrylate, methyl methacrylate, modified rosin acrylate monomers, and maleimide-modified CNC, among other components. A cross-linked network is constructed by utilizing the Diels-Alder reaction between the furan rings in the modified rosin acrylate monomers and the maleimide groups on the surface of the maleimide-modified CNC. This emulsion exhibits both high toughness and high hardness, is storage stable, and demonstrates excellent impact resistance, low-temperature flexibility, and adhesion after film formation. Furthermore, it has low VOC content, no free formaldehyde, and is environmentally compliant, making it widely applicable in coatings and adhesives used in medium- and low-temperature applications such as automotive interiors, flexible packaging, and leather finishing.

This invention discloses a high-performance non-polar adhesive material and its preparation method. The adhesive material is prepared by first preparing an interfacial bridger containing lauryl methacrylate, butyl acrylate, methyl methacrylate, methacrylic acid, and hydroxyethyl methacrylate, and then reacting it with a nano-calcium carbonate modified polyacrylate emulsion, C9 petroleum resin emulsion, emulsified silicone oil, potassium zirconium carbonate, nano-active zinc oxide, LK water-resistant agent, Kathon, and water through a specific process. The interfacial bridger possesses both a non-polar long-chain alkyl structure and polar active groups, which can improve the wetting and interfacial adsorption capacity of non-polar substrates such as polyethylene and polypropylene, and enhance the synergistic effect with the main emulsion and cross-linking system. The adhesive material has advantages such as fast initial tack, high bond strength, good cold water resistance, and excellent system stability, and is suitable for bonding polyethylene or polypropylene to paper, glass, and coated paper.

The application discloses a kind of high-strength deformable porous hydrogel for postoperative abdominal cavity tissue effusion drainage, belong to medical porous hydrogel technical field, specifically related to monomer, crosslinking agent and initiator are added to water and mixed to obtain the reaction solution of temperature-sensitive hydrogel, freeze polymerization obtains ice gel;Ice gel is placed in salt solution and is handled to obtain porous hydrogel;Monomer includes at least one of N-isopropyl acrylamide, N-vinyl caprolactam, N,N-diethyl acrylamide, N-vinyl carbazole, acrylic acid, methyl methacrylate, ethylene glycol methyl ether acrylate, butyl methacrylate, maleic anhydride and styrene.The application provides a kind of temperature-sensitive effect, can be dynamically controlled by electric heating, good mechanical property, good drainage effect high-strength deformable porous hydrogel for postoperative abdominal cavity tissue effusion drainage.

This invention relates to the field of water-based pressure-sensitive adhesives, specifically disclosing a non-residue water-based acrylic pressure-sensitive adhesive for hot-fix rhinestone positioning paper and its preparation method. The pressure-sensitive adhesive is prepared using butyl acrylate, isooctyl acrylate, acrylic acid, methyl methacrylate, hydroxyethyl acrylate, and methyl acrylate as main monomers, combined with emulsifiers, initiators, wetting agents, defoamers, pH adjusters, tert-butyl hydroperoxide, sodium formaldehyde sulfoxylate, and water. This water-based acrylic pressure-sensitive adhesive exhibits excellent initial tack, high cohesive strength, high temperature resistance, no residue after hot-fixing, reusability, good weather resistance, and low VOCs. It can stably adhere to rhinestones of different sizes and shapes, is suitable for coating PET films to produce hot-fix rhinestone positioning paper, and can be widely used in the textile and apparel hot-fix rhinestone decoration field.

The application relates to an application of a block copolymer as a high-temperature capacitor dielectric material. The block copolymer is an A-B-A triblock structure, wherein the A chain segment is a random copolymer of styrene and alpha-methylene-gamma-butyrolactone, and the B chain segment is an ester flexible chain segment (such as butyl acrylate). The total molecular weight of the polymer is 4-200,000, and the proportion of the B chain segment is less than or equal to 25%. A nano-phase separation structure is formed through RAFT emulsion polymerization, charge migration is inhibited by utilizing an interface deep trap, and the following super-high insulation and energy storage performance at 125 DEG C is realized: the breakdown strength is greater than or equal to 600 MV / m, the dielectric loss tan delta is less than or equal to 0.008 (the frequency is 1 kHz), the energy storage density is 7.9 J / cm 3 , and the efficiency is greater than or equal to 90%. The material has high-temperature stability (10 4 cycles of capacity retention rate > 98%) and processability, and is suitable for high-temperature power system capacitors of new energy vehicles and the like.