168 results about "Styrene Monomer" patented technology

The invention provides an adsorbent capable of simultaneously adsorbing bilirubin and cytokines and a preparation method and application thereof, and the preparation method comprises the following steps: carrying out suspension polymerization reaction on a styrene monomer and a polyvinyl cross-linking agent in a dispersion medium under the action of a continuous multi-component pore-foaming agent and an initiator to prepare polystyrene-based macroporous resin; carrying out chloromethylation reaction on the polystyrene-based macroporous resin to prepare chlorine balls; carrying out post-crosslinking reaction on the chloromethylated beads to prepare the adsorbent capable of adsorbing bilirubin and cytokines at the same time; the continuous multi-component pore-foaming agent comprises a first pore-foaming agent, a second pore-foaming agent and a third pore-foaming agent of which the solubility parameters are gradually increased in sequence; the temperature of the suspension polymerization reaction is adjusted according to the mass fraction of the polyvinyl cross-linking agent in the monomer mixture and the solubility parameter of the continuous multi-component pore-foaming agent, and the monomer mixture is composed of styrene monomers and the polyvinyl cross-linking agent. The bilirubin and cell factors can be adsorbed at the same time, and the safety of blood purification is improved.

This invention provides an environmentally friendly expandable polystyrene bead and its preparation process, belonging to the field of foaming material technology. The preparation process includes the following steps: S1, injecting 65.28g of deionized water into a reaction vessel, stirring, adding 0.13g of dispersant and 0.16g of composite stabilizer, dispersing for 20min, then adding 31.95g of styrene monomer and 0.3g of composite initiator, followed by the addition of pentane and SiO2 micelle composite to obtain a base solution; wherein the mass ratio of pentane to SiO2 micelle composite is 1:(0.2-0.3); the mass of pentane is 3.1%-3.2% of the mass of the base solution; S2, subjecting the base solution to stepwise heating at 86℃-140℃ with stirring, then stopping heating, continuing stirring, and allowing it to cool naturally to 40℃, then stopping stirring, with a total reaction time of 8.5-9.5h to obtain the reaction product; S3, discharging the material, washing the reaction product with warm water, filtering, and obtaining the environmentally friendly expandable polystyrene beads. This invention improves the average particle size of expandable polystyrene beads while reducing fine powder.

A system can be used to reduce the impurities present in a styrene monomer product distilled from a pyrolysis oil. The system can include a fractionation train downstream from a depolymerization unit. The fractionation train may include four fractionation columns in series and produce a styrene monomer product stream comprises at least 99.0 wt% styrene and 300 ppm or less cumene.

This invention discloses a BMC material for preparing food contact products and its preparation method. The material comprises the following components by mass percentage: 12%–20% food contact grade styrene-based unsaturated polyester resin (compliant with GB 4806.7-2016); 3%–10% solvent-free PMMA powder; 0.5%–1% zinc stearate; 0.2%–0.6% curing agent TBIC; 0.01%–0.1% polymerization inhibitor TBHQ; 0.01%–0.05% stabilizer BHT; 20%–45% calcium carbonate; 10%–40% aluminum hydroxide; and 5%–10% glass fiber. This invention, by using low-cost food contact grade styrene-based resin combined with solvent-free PMMA powder and optimizing the ratio of TBIC to TBHQ, achieves near-zero styrene monomer residue in the product while reducing costs. This effectively solves the problems of high cost, difficulty in processability adjustment, and monomer residue risk associated with traditional food contact grade BMC materials. The cost of the resulting material can be controlled below 7 yuan / kg, and it has both flame-retardant and high-strength properties, making it a widely viable alternative to traditional food contact grade plastics.

The present invention relates to a process for preparation of an ABS graft copolymer. The process comprises (i) grafting a butadiene latex with a gel content in a range from 75% to 90% with a first portion of acrylonitrile and styrene monomers in a percentage ratio in a range from 1.4 to 1.6, in presence of an initiator- 1 and a molecular weight regulator, carrying out the polymerization for 0.5 hours to 1.5 hours, (ii) adding a second portion of acrylonitrile and styrene, additional initiator- 1 and molecular weight regulator to step (i), and continuing polymerization for 3 hours to 5 hours, and (iii) additionally adding the initiator- 1 or an initiator-2 to step (ii), and continuing polymerization for 1 hour to 2 hours. The feeding pattern of monomers in the process provides a high polymerization rate and thereby reduces residual monomer content.

Methods and fracturing fluids for fracturing subterranean formations using in situ proppant particles. The method includes injecting a fracturing fluid into a subterranean formation at a gradient equal to or higher than a fracture. The fracturing fluid comprises a non-phase-change fluid, and the non-phase-change fluid at least comprises an aqueous fluid and a surfactant; and a phase change fluid comprising a phase change material selected from the group consisting of a styrene monomer, a methyl methacrylate monomer, or a combination of a styrene monomer and a methyl methacrylate monomer, an initiator, and optionally an accelerator.

The invention discloses a method for preparing styrene by utilizing a solvent to synergistically catalyze and depolymerize waste polystyrene, and belongs to the technical field of waste plastic recycling. According to the method, a ZnAl2O4 spinel catalyst with rich surface defects is adopted to react for 10 minutes to 1 hour at the temperature of 200 to 450 DEG C in a specific low-concentration solvent system (1 to 10 weight percent), so that efficient depolymerization of polystyrene is realized. According to the method, the catalyst with a specific structure is combined with optimized solvent concentration and reaction time process parameters to achieve a synergistic effect, so that high conversion rate (gt, 98%) of polystyrene and high selectivity (gt, 75%) of styrene monomers are simultaneously realized under mild conditions, and an efficient solution is provided for high-valued closed-loop recovery of polystyrene.

The present invention provides a multilayer molded product that exhibits excellent heat resistance, brightness, chromaticity, and diffusivity even when light diffusing agents and quantum dots are added to the multilayer molded product. [Solution] According to the present invention, a multilayer molded article is provided comprising an A1 layer, an A2 layer, and a B layer, wherein the A1 layer is provided on one surface of the B layer directly or via another layer, and the A2 layer is provided on the other surface of the B layer directly or via another layer, the A1 layer and the A2 layer are each composed of a resin composition A, and the B layer is composed of a resin composition B, the resin composition A contains a styrene polymer A, the styrene polymer A has 50 to 97% by mass of styrene monomer units, 3 to 15% by mass of (meth)acrylic acid units, and 0 to 35% by mass of (meth)acrylic acid ester units, and the resin composition B contains a styrene polymer B, the styrene polymer B has 88 to 100% by mass of styrene monomer units, 0 to 2% by mass of (meth)acrylic acid units, and 0 to 10% by mass of (meth)acrylic acid ester units.

The application discloses an adsorbent for removing protein-bound toxins and middle-molecular toxins and a preparation method thereof, and belongs to the technical field of polymer materials, and comprises the following steps: polystyrene-based white ball preparation, amine immobilization and film coating.The application has the beneficial effects that: a kind of adsorbent capable of adsorbing protein-bound toxins and middle-molecular toxins is prepared by adding a pore-forming agent under the participation of styrene monomers, polyvinyl benzene series, glycidyl methacrylate and 4,4'-bis(methacrylamido)-azobenzene, the adsorption effect is good, and the adsorbent has high selectivity; the process method is simple, green and environment-friendly; glycidyl methacrylate and modified cyclodextrin are added, the hydrophilicity of the adsorbent is enhanced, the blood compatibility of the adsorbent is improved, and the adsorption effect of the adsorbent is enhanced through amine group immobilization.

A system can be used to generate styrene monomer product from feedstock originating from a pyrolysis operation and a dehydrogenation operation. The system can include a styrene processing subsystem and a distillation column. The styrene processing subsystem can be positioned to receive first feedstock and to generate the styrene monomer product. The styrene processing subsystem can include an initial distillation column. The distillation column can be coupled with the initial distillation column to provide at least a portion of the first feedstock. The distillation column can positioned to receive second feedstock that can include pyrolysis oil and to generate the portion of the first feedstock by separating styrene from the pyrolysis oil.

The present invention relates to a resin composition comprising a modified petroleum resin having a structure in which a molecular weight adjuster is combined to at least one of both ends of at least partially hydrogenated or non-hydrogenated petroleum resin, wherein the modified petroleum resin includes at least one unit structure from a styrene monomer, wherein the resin composition has a Gardner color of 10 or less.

The present disclosure relates, according to some embodiments, to a method for recovery of lithium ions from a lithium-ion containing liquid, the method comprising the steps of coating a nanoparticle with a styrene monomer; polymerizing the styrene monomer to form a polystyrene-coated nanoparticle; attaching a dibenzo-12-crown-4-ether to the polystyrene-coated nanoparticle to form a lithium adsorbing medium; exposing the lithium ion-containing liquid to the lithium adsorbing medium to form a lithium-rich adsorbing medium; and extracting the lithium ion from the lithium-rich adsorbing medium.

The invention discloses a modified polystyrene material, a preparation method and a light diffusion plate using the modified polystyrene material, relates to the technical field of light diffusion plate materials, and belongs to the patent publication number C08L53 / 02. The preparation method of the modified polystyrene material comprises the following steps: mixing a styrene monomer, an alpha-methyl styrene monomer, vinyl functionalized cage type silsesquioxane, benzoyl peroxide and lauryl mercaptan, and carrying out polymerization reaction under the protection of nitrogen to obtain a polystyrene prepolymer; the preparation method comprises the following steps: dispersing lamellar zirconium phosphate nanosheets in absolute ethyl alcohol, adding gamma-(methacryloyloxy) propyltrimethoxysilane and glacial acetic acid, and performing reflux reaction to obtain coupling agent modified zirconium phosphate nanosheets; crushing the polystyrene prepolymer, premixing with the coupling agent modified zirconium phosphate nanosheets, the antioxidant and the lubricant at a high speed, drying, feeding into a double-screw extruder for melt blending, extruding, cooling, pelletizing and drying to obtain the modified polystyrene material. The modified polystyrene material prepared by the invention has excellent heat resistance.

The invention discloses a rubber wet-skid-resistant material as well as a preparation method and application thereof, and belongs to the field of rubber additives. The invention relates to a rubber wet-skid-resistant material, which is prepared from the following raw materials by weight: 30-50 parts of a styrene-alpha-methylstyrene copolymer; 8 to 15 parts of a modified terpolymer; the modified terpolymer is formed by copolymerizing a styrene monomer, a diene monomer and 2, 6-di-tert-butyl-4-vinylphenol. The invention relates to a preparation method of a rubber wet-skid-resistant material, which comprises the following steps: carrying out copolymerization reaction on a styrene monomer, a diene monomer and 2, 6-di-tert-butyl-4-vinylphenol to obtain a modified terpolymer, and mixing a styrene-alpha-methylstyrene copolymer with the modified terpolymer to obtain the rubber wet-skid-resistant material. The method has the effect of more comprehensively and effectively improving the wet skid resistance of the rubber.

The invention relates to a Janus hollow microsphere as well as a preparation method and application thereof. The Janus hollow microsphere comprises a hollow part, a first shell layer and a second shell layer in sequence from inside to outside in the radial direction, the first shell layer comprises a lipophilic polymer, the lipophilic polymer comprises a styrene monomer-based unit and a cross-linking agent-based unit, and the second shell layer comprises a hydrophilic polymer. The Janus hollow microsphere provided by the invention shows Janus characteristics and is provided with a hollow part, and is particularly suitable for the fields needing to carry guest substances, for example, the Janus hollow microsphere can be widely applied to various fields such as biological medicines, catalytic carriers and the like.

The invention relates to the technical field of petroleum drilling fluid, and discloses a lubricant for drilling fluid and a preparation method of the lubricant. The preparation method comprises the following steps: introducing a quaternary phosphonium salt cationic modifier into the interlayer of montmorillonite through cation exchange to enlarge the interlayer spacing, and meanwhile, further grafting 3-(methacryloyloxy) propyltrimethoxysilane to the surface of quaternary phosphonium salt modified montmorillonite to obtain silane cation modified montmorillonite; the preparation method comprises the following steps: carrying out pre-swelling on silane cation modified montmorillonite, a styrene monomer, a triazinyl modified benzoxazine cross-linking agent and a methacrylic acid monomer, and carrying out in-situ soap-free emulsion polymerization to promote high stripping and good dispersion of montmorillonite in a copolymer matrix so as to prepare the modified montmorillonite nano composite microspheres. Methyl silicone oil, modified montmorillonite nano composite microspheres, sorbitan monostearate and oleic acid are stirred and emulsified to obtain the lubricant for the drilling fluid, so that the lubricating property and high temperature resistance of the lubricant are improved.

The invention discloses styrene-acrylic resin for spinning and a preparation method thereof, and relates to the field of styrene-acrylic resin. The propyl benzene resin for spinning is prepared from the following raw materials in parts by weight: 22 to 28 parts of styrene monomer; 48 to 55 parts of an acrylate monomer; 11 to 17 parts of dodecyl methacrylate; 4 to 8 parts of beta-cyclodextrin; 0.8 to 1.3 parts of a cross-linking agent monomer; 5-10 parts of a maleic anhydride grafted polylactic acid monomer; 3-6 parts of an emulsifier; 0.2 to 0.5 part of an initiator; 24 to 35 parts of water; the maleic anhydride grafted polylactic acid monomer is obtained by performing prepolymerization and catalytic melt polymerization on maleic anhydride and lactic acid. The styrene-acrylic resin prepared in the invention can improve the stiffness of a fabric after dip finishing of the fabric, does not affect the softness and whiteness of the fabric, does not cause yellowing of the fabric, and has good durability and washing resistance of an emulsion.

This invention relates to the field of oil and gas reservoir production engineering, and discloses a hydrolyzable polymer, its preparation method, a fracturing in-fracture hydrolyzable polymer drainage aid, and its application. The hydrolyzable polymer contains: structural unit one provided by a styrene monomer; structural unit two provided by a maleic anhydride monomer; optionally, structural unit three provided by an amine and / or ammonium monomer having an olefin double bond; and structural unit four provided by a fluorine-containing monomer having an olefin double bond. The molar ratio of structural unit two to structural units one and three is 1:(3-7):(0-2.5); and the content of structural unit four is not less than 0.05 wt%. The drainage aid of this invention overcomes the shortcomings of existing drainage aids, such as excessive adsorption near the wellbore and "chromatographic separation" during migration. Furthermore, it exhibits low interfacial tension after hydrolysis, making it highly valuable for application.

The application relates to the technical field of waste plastic recycling, and discloses a mixed plastic waste high-value recycling method based on pre-classification and sequential depolymerization. First, mixed plastic waste is crushed and dried, then wet flotation is carried out by using two solutions with different densities, and PET-rich material pieces, PS-rich material pieces and polyolefin-rich material pieces are separated. Subsequently, the PET-rich material pieces are subjected to catalytic alcoholysis to recycle high-purity bis-hydroxyethyl terephthalate monomers; the PS-rich material pieces are subjected to catalytic pyrolysis to recycle high-purity styrene monomers; and the polyolefin-rich material pieces and process residues are subjected to pyrolysis to be converted into pyrolysis oil. By the strategy of 'first separation and then treatment', high-selectivity and high-yield recovery of high-value components in complex mixed plastics is realized, the process route is clear, and the method is economic and environmentally friendly.

A process for producing styrene monomers from styrene oligomers comprises the following steps: a) providing a composition (A) comprising at least one type of styrene oligomer, wherein the composition (A) comprises at least 15 wt.-% of styrene dimers and / or styrene trimers; b) providing a depolymerization reactor (R) with a reaction zone (Z); c) feeding the composition (A) into the reaction zone (Z) of the reactor (R); d) depolymerizing the at least one type of styrene oligomer in the reaction zone (Z) to obtain a composition (B), comprising styrene monomers; e) removing the composition (B) from the reaction zone (Z); and f) isolating the styrene monomers from the composition (B); wherein the temperature (T) inside the reaction zone (Z) is above 500° C. to below 800° C. and the average residence time (tA) of the composition (A) in the reaction zone (Z) is greater than 0.01 s and less than 60 s.

The invention provides a resin composition containing a copolymer, a method for producing the same, and a molded article. Provided is a resin composition containing a copolymer containing a styrene-based monomer unit and a (meth) acrylate-based monomer unit, which has excellent safety, productivity and injection moldability in cosmetic and food packaging applications, as well as excellent hue and light resistance of a molded article, and which has little odor. According to the present invention, provided is a resin composition containing a copolymer containing a styrene monomer unit and a (meth) acrylate monomer unit, the resin composition being characterized in that the total content of unreacted monomers is 2000 ppm by mass or less, the sulfur content is more than 0 ppm by mass but 150 ppm by mass or less, and the yellowness of a 2 mmt injection-molded plate is 0.6 or less.

The invention discloses a modified PET optical film and a preparation method thereof, and the optical film comprises the following components in parts by weight: 100 parts of PET resin, 18-22 parts of a modified PET prepolymer, 2-3 parts of a composite absorbent, 0.2-0.6 part of an antioxidant and 0.1-1 part of a processing aid, the composite absorbent is composed of a benzotriazole ultraviolet absorbent and a triazine blue light absorbent; the modified PET prepolymer is prepared by the following steps: grafting a PET prepolymer with a styrene monomer through alkyl acrylate, and then carrying out micro-crosslinking treatment on glycidyl methacrylate and a hydroxyl-containing acrylate monomer. According to the invention, a rigid chain segment is introduced into a PET molecular chain through two-stage modification, a moderate cross-linked network is constructed, and a novel composite absorbent and a processing aid are cooperated, so that the film has the advantages of low thermal expansion coefficient, high dimensional stability, high visible light transmittance and excellent ultraviolet-blue light barrier property, and the process is simple and suitable for industrial application.

The present disclosure relates, according to some embodiments, to a method for recovery of lithium ions from a lithium-ion containing liquid, the method comprising the steps of coating a nanoparticle with a styrene monomer; polymerizing the styrene monomer to form a polystyrene-coated nanoparticle; attaching a dibenzo-12-crown-4-ether to the polystyrene-coated nanoparticle to form a lithium adsorbing medium; exposing the lithium ion-containing liquid to the lithium adsorbing medium to form a lithium-rich adsorbing medium; and extracting the lithium ion from the lithium-rich adsorbing medium.

The invention provides an environment-friendly expandable polystyrene bead and a preparation process thereof, and belongs to the technical field of foaming materials.The preparation process includes the steps that S1, 65.28 g of deionized water is injected into a reaction kettle, stirring is conducted, 0.13 g of dispersing agent and 0.16 g of compound stabilizer are added, after dispersion is conducted for 20 min, 31.95 g of styrene monomer and 0.3 g of compound initiator are added, then pentane and SiO2 micelle complex is added, and a basic solution is obtained; wherein the mass ratio of the pentane to the SiO2 micelle complex is 1: (0.2-0.3); the mass of the pentane is 3.1%-3.2% of the mass of the basic solution; s2, stepwise heating the basic solution at 86-140 DEG C, carrying out stirring reaction, then stopping heating, continuously stirring, naturally cooling to 40 DEG C, stopping stirring, and carrying out total reaction for 8.5-9.5 hours to obtain a reaction product; and S3, discharging, washing a reaction product with warm water, and filtering to obtain the environment-friendly expandable polystyrene bead. According to the method, the average particle size of the prepared expandable polystyrene beads is increased, and meanwhile, fine powder is reduced.

The present application belongs to the technical field of fluorescent composite microspheres, and relates to a preparation method of carbon dot-polystyrene fluorescent composite microspheres. The present application discloses a preparation method of carbon dot-polystyrene fluorescent composite microspheres, which comprises the following steps: dispersing carbon dots after freeze-drying in an alkaline solution, and uniformly stirring under heating; then adding an initiator, methyl methacrylate and styrene monomers, mixing, and performing condensation reflux reaction in an inert gas to obtain carbon dot-polystyrene fluorescent composite microspheres. The present application further discloses a rapid detection reagent, which is carbon dot-polystyrene fluorescent composite microspheres coupled with biomolecules on the surface. The present application wraps carbon dots in a polystyrene matrix through a soap-free emulsion polymerization method, simplifies the preparation process, reduces the influence of external environment on the carbon dots, improves the stability and fluorescent performance of the fluorescent composite microspheres, and can also be coupled with biomolecules, and is used for high-sensitivity biological analysis and detection.

The invention relates to a photochromic coating. The photochromic coating comprises a component A and a component B, the component A is prepared from the following raw materials: a hydroxyl-containing acrylate copolymer and a photochromic dye; the hydroxyl-containing acrylate copolymer is prepared from the following raw materials: a copolymer monomer, wherein the copolymer monomer comprises an acrylate monomer and a styrene monomer; the equivalence ratio of a hydroxyl group of the hydroxyl-containing acrylate copolymer to an isocyanate group of the polyisocyanate curing agent is 1: (0.9-1.1). By optimizing the formula of the photochromic coating, the color changing performance and stability are remarkably improved, and the haze is effectively controlled.

This invention discloses a diblock styrene-butadiene copolymer, its preparation method, and its application in transparent vulcanized shoe soles. The diblock styrene-butadiene copolymer is composed of styrene homopolymer blocks and styrene-butadiene random copolymer blocks. The preparation method involves adding a mixture of styrene and butadiene monomers to an anionic polymerization system for random copolymerization, followed by adding styrene monomers for homopolymerization. After homopolymerization is completed, the polymerization is terminated to obtain the desired product. When used in vulcanized shoe soles, this diblock styrene-butadiene copolymer can achieve a light transmittance of over 80% and excellent abrasion resistance and tear resistance.

Provided is an optical styrene-based resin composition having excellent light stability for long-term use of a semiconductor light source such as an LED light source. According to the present invention, provided is an optical styrene-based resin composition containing a styrene-based resin, the content of a styrene-based monomer being 1000 [mu] g or less and the total of the content of a linear dimer of the styrene-based monomer and the content of a linear trimer of the styrene-based monomer being 10-500 [mu] g per 1 g of the optical styrene-based resin composition.

The invention discloses an acrylic resin photoresist composition as well as a preparation method and application thereof, and the photoresist composition comprises the following components in parts by mass: 30-60 parts of photosensitive resin, 10-30 parts of alicyclic epoxy compound and 5-20 parts of diazonaphthoquinone photoactive compound. Wherein the photosensitive resin comprises at least one of a repeating unit derived from an acrylate monomer, a repeating unit derived from a styrene monomer and a repeating unit derived from an N-substituted maleimide monomer; the weight-average molecular weight of the photosensitive resin is 2000 to 20000 g / mol. The cured film formed by the photoresist composition can effectively improve the heat resistance, has excellent insulating property, high penetration rate and good air permeability, can effectively flatten the terrain on the Array side, improves poor contact, reduces the unevenness of the substrate surface, and keeps good photosensitive property and resolution.

In a process for recovering styrene monomer from polystyrene, a feed comprising benzene, toluene, ethylbenzene, styrene monomer and C9+ aromatics produced by depolymerizing polystyrene is supplied to a first fractionation column and divided into a first bottoms fraction containing part of the C9+ aromatics in the feed and a first overhead fraction composed of the remainder of the feed. The first overhead fraction is supplied to a second fractionation column and divided into a second overhead fraction rich in benzene, toluene, and ethylbenzene compared to the first overhead fraction and a second bottoms fraction rich in styrene monomer and C9+ aromatics compared to the first overhead fraction. The second bottoms fraction is supplied to a third fractionation column and divided into a third overhead fraction rich in styrene monomer compared to the second bottoms fraction and a third bottoms fraction rich in C9+ aromatics compared to the second bottoms fraction.