238 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.

The invention relates to the technical field of production of expandable polystyrene (EPS) beads, and discloses a production process of EPS beads, which comprises the following steps: preparing styrene monomer, deionized water, foaming agent, initiator, dispersing agent and stabilizer raw materials, accurately weighing various raw materials according to the production process and product requirements, and uniformly mixing according to a certain ratio to obtain the EPS beads. The preparation method comprises the following steps: sequentially adding the prepared raw materials into a reaction kettle, firstly adding deionized water, then quantitatively adding a styrene monomer, starting a stirrer, then sequentially adding auxiliaries such as an initiator, a dispersing agent and a stabilizer, and continuously stirring and uniformly mixing to carry out polymerization reaction. According to the present invention, the modern expandable polystyrene bead production process mostly adopts the automatic production line, the continuous and stable production can be achieved, the production efficiency is improved, the styrene monomer, the initiator and the foaming agent are simultaneously added into the reaction kettle in the new preparation production process, the production process is simplified, the production links are reduced, and the production cost is reduced. Therefore, the production efficiency is further 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.

The invention belongs to the technical field of polymer synthetic materials, and particularly relates to bio-based MS resin and a preparation method thereof. The bio-based MS resin is a free radical copolymer of a methyl methacrylate monomer and a styrene monomer; the methyl methacrylate monomers comprise bio-based methyl methacrylate, isobornyl methacrylate and 3-pinane methacrylate, and the methyl methacrylate monomers comprise methyl methacrylate, isobornyl methacrylate and 3-pinane methacrylate; the styrene monomers comprise styrene and caffeic acid derivatives; based on 100% of the mass of the bio-based MS resin, the methacrylate monomer accounts for 30%; the molar ratio of caffeic acid derivatives to styrene in the styrene monomers is 1: (1-9). The synthesized bio-based MS resin has the characteristics of greenness and reproducibility, compared with petroleum-based MS resin, the performance of the MS resin can be regulated and controlled by designing a protecting group of a bio-based caffeic acid derivative so as to expand the application range of the MS resin, a specific functional group can be introduced to prepare a functional, advanced and high-performance polymer material, and the MS resin has a good market prospect.

The invention discloses a preparation method of a grafted polymer brush copolymer, which comprises the following steps: S1, mixing a styrene monomer, N-4-vinyl phenyl-N, N-dimethylamine, toluene and AIBN, heating, and reacting to generate a first section of polymer; and S2, mixing the first-section polymer with an acrylate monomer and an imide compound, and continuously reacting under an illumination condition to obtain the polymer brush copolymer. AIBN can be decomposed at high temperature to generate free radicals, polystyrene monomers are initiated to polymerize, and a first-section polymer is formed. The imide compound and a nitrogen-containing initiation site form a charge transfer complex under an illumination condition. The charge transfer complex can be dissociated to generate free radicals formed by nitrogen-containing initiation sites, and then the free radicals formed by the nitrogen-containing initiation sites initiate polymerization of acrylate monomers to obtain a grafted polymer brush copolymer. The preparation method is simple in reaction condition, simple and convenient to operate and suitable for industrial large-scale production.

The invention discloses alkoxy amine and application of the alkoxy amine in induction of NMP (N-Methyl Pyrrolidone) polymerization of methacrylate monomers and styrene monomers. The alkoxy amine is a novel compound which is synthesized by taking benzaldehyde and isopropylamine as raw materials through three-step reaction of Schiff base reduction, oxidizing agent oxidation and free radical coupling. The obtained alkoxyamine can be used as a monomolecular initiator to effectively regulate and control controllable polymerization of methacrylate and styrene monomers under anaerobic or aerobic conditions, and the peak pattern of a gel chromatography outflow curve is symmetrical and has no obvious tailing phenomenon, so that the alkoxyamine can expand the range of nitroxide free radical polymerization regulation and control monomers, and the preparation method is simple and easy to implement. The method has a good application prospect in the aspect of synthesis of functional polymer materials.

Disclosed is the use of a dividing-wall column in a process for co-producing propylene oxide and styrene monomer. Feed streams to a dividing-wall column comprise a bottoms product produced in recovering crude propylene oxide from an epoxidation reaction product, a hydrogenated byproduct styrene monomer production, and a light fraction of a bottoms product withdrawn from the dividing-wall column. Products from the dividing-wall column comprise an overhead product comprising ethylbenzene for recycle to an oxidation zone, an intermediate product comprising methylbenzyl alcohol and acetophenone as feed to a dehydration zone to produce styrene monomer, and a bottoms product comprising methylbenzyl alcohol and heavy materials.

To provide a new polymer capable of providing a resin product having functionality.SOLUTION: There are provided: a copolymer comprising an acrylonitrile monomer unit and a styrene monomer unit, which is a copolymer having a cationic group at the end, in which the cationic group is a residue of 2,2'-azobis-(2-(1,3-dimethyl-4,5-dihydro-1H-imidazol-3-ium-2-yl))propane triflate; an additive for imparting antimicrobial properties to a resin which comprises the copolymer; a resin composition comprising the copolymer and a general-purpose resin such as ABS resin; and a resin molded body obtained by molding the resin composition.SELECTED DRAWING: None

Provided herein are compositions including lipids and copolymers in the form of a nanodisc assembly. The subject copolymers include monomer units of styrene and monomer units selected from acrylic acid and an acrylic acid derivative. In certain cases, the copolymer is a copolymer of styrene and acrylic acid. Also provided herein, is an aqueous solution comprising the subject composition. Also provided herein, are methods for producing a nanodisc assembly, including incubation of a lipid and a subject copolymer. Further provided herein, are methods for solubilizing a membrane protein in an aqueous solution, wherein the method includes forming a nanodisc assembly of a lipid bilayer having one or more membrane proteins embedded therein, and a subject copolymer. Also provided are methods of solubilizing a hydrophobic constituent in an aqueous solution, including forming a nanodisc assembly of a lipid, a hydrophobic constituent, and a subject copolymer.

Provided is a method for producing regenerated foamable styrene-based resin particles, which is highly environmentally friendly, and which is used for producing regenerated foamable styrene-based resin particles in which the odor, particularly the odor derived from alkylamine, is suppressed. A method for producing regenerated foamable styrene-based resin particles having an alkylamine release amount of less than Yng / g using regenerated styrene-based resin starting material particles (a) having an alkylamine release amount of Xng / g or more (wherein X > = Y, Y < = 5, Y > = 0), (1) Regenerated styrene resin particles (A) obtained by adding a styrene monomer to a suspension containing the regenerated styrene resin starting material particles (a) and polymerizing the same are pressure-injected and impregnated with a volatile foaming agent, and water having a total concentration of specific metals in a specific range is used as feed water used in the preparation of the suspension, and the total concentration of the specific metals in the feed water is within a specific range. Alternatively, (2) the regenerated styrene-based resin raw material particles (a) are used as regenerated styrene-based resin particles (A), a volatile foaming agent is pressure-injected and impregnated in a suspension containing the regenerated styrene-based resin particles (A), and water in which the total content concentration of specific metals is within a specific range is used as feed water to be used for producing the suspension.

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 present invention relates to the technical field of finishing agents and discloses a method for preparing a polyurethane acrylic resin finishing agent for improving fabric stiffness. The method comprises reacting polyether polyol, isophorone diisocyanate, sodium hydroxysulfonate styrene monomer, etc. to obtain a polyurethane acrylic ester. The polyurethane acrylic ester is then polymerized with an acrylate monomer, sodium hydroxysulfonate styrene monomer, azobisisobutyronitrile, etc. to obtain a polyurethane acrylic resin finishing agent. The sodium hydroxysulfonate styrene monomer of the present invention serves as both an end-capping agent and a hardening monomer. The polyurethane acrylic resin finishing agent prepared by the polyurethane acrylic resin finishing agent significantly improves the stiffness of cotton fabric and its resistance to bending deformation. Furthermore, the finished cotton fabric maintains a low water droplet diffusion time, exhibiting excellent hydrophilicity.

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.

A significant reduction in conversion rate has been observed with a recycled styrene-based resin composition obtained by polymerizing a recycled styrene monomer produced by a conventional method compared with a styrene-based resin composition obtained by polymerizing a petroleum-derived styrene monomer. The purpose of the present invention is to provide a styrene monomer composition comprising (A) a recycled styrene monomer derived from a pyrolysis product of a styrene-based resin product containing a cellulose-based compound, and (B) a pyrolysis compound derived from a pyrolysis product of the styrene-based resin product other than the recycled styrene monomer (A), wherein the pyrolysis compound (B) is contained in an amount of 5 × 10-2 parts by mass or less with respect to 100 parts by mass of the recycled styrene monomer (A).

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 relates to the technical field of rubber materials, in particular to bio-based itaconate rubber, a preparation method of the bio-based itaconate rubber and a bio-based itaconate rubber product. According to the preparation method provided by the invention, a small amount of styrene monomer, emulsifier, reducing agent, initiator and chain transfer agent are supplemented in the second-stage polymerization reaction, so that the content of residual itaconate in the finally obtained rubber is reduced to be less than 500 ppm; the problems that in the prior art, the conversion rate of itaconate is low, a large number of unreacted monomers are left, and resources are wasted are effectively solved, operation is easy, and the reaction period is short. And the added styrene is more inclined to monomer addition instead of chain transfer, so that the crosslinking risk is remarkably reduced. Due to the fact that the content of the residual itaconate in the latex is extremely low, the content of the itaconate entering waste water and waste gas is basically zero in the follow-up flocculation and washing process, the treatment cost is reduced, and environmental pollution is reduced.

A polymer composition comprises: a) at least one block thermoplastic elastomer comprising at least one elastomer block and at least one thermoplastic block, the elastomer block(s) predominantly comprising units derived from butadiene, the thermoplastic block(s) consisting of units derived from one or more styrene monomers, b) at least one plasticizer selected from butadiene oligomers with: b1) the molar content of 1,2-polybutadiene units in said plasticizer is within a range of from 70% to 130% of that in the elastomer block of the thermoplastic elastomer, and the molar mass of the plasticizer is greater than 1500 and less than 50 000 g / mol, or else b2) the molar content of 1,2-polybutadiene units in the plasticizer is less than 70%, or greater than 130%, of that in the elastomer block of the thermoplastic elastomer, and the molar mass of the plasticizer is greater than 4000 and less than 50 000 g / mol.

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 present application relates to a kind of carboxyl functional time-resolved fluorescent microspheres and its preparation method, belong to fluorescent microsphere technical field.The preparation method described in the present application includes the following steps, under acidic conditions, europium salt, lanthanide salt, beta-diketone ligand, synergistic ligand and bridging ligand occur in organic solvent, obtain binuclear rare earth complex;Binuclear rare earth complex, styrene monomer, acrylic monomer, initiator, polyvinylpyrrolidone, emulsifier occur in solvent dispersion polymerization reaction, obtain the carboxyl functional time-resolved fluorescent microsphere.The preparation method described in the present application directly coats dye in the microsphere interior in polymerization stage, need not consider time-resolved fluorescent dye steric effect, can select greater, but fluorescence intensity stronger, cannot be applied to swelling method binuclear rare earth complex as time-resolved fluorescent dye, so that the fluorescence intensity of time-resolved fluorescent microsphere is higher.

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.