297 results about "Styrene Monomer" patented technology

The invention relates to the field of textile materials, and particularly discloses a graphene enhanced polyester yarn and a preparation method thereof.The preparation method comprises the following steps that silicon dioxide aerogel serves as a porous carrier to be loaded with graphene, and a graphene-porous carrier composite material is prepared; the graphene-porous carrier composite material is subjected to modification treatment through vinyl trimethoxy silane and 3-amino propyl triethoxy silane, and then a modified graphene composite material is prepared; reacting the modified graphene composite material, a styrene monomer, an acrylate monomer and an initiator to prepare modified graphene; mixing the prepared modified graphene with polyester chips, and then carrying out melt spinning to prepare graphene enhanced polyester yarns; the invention further discloses the graphene enhanced polyester yarn prepared by adopting the preparation method. The preparation method has the characteristics that the dispersion of the graphene in the polyester is improved, and the direct interface compatibility of the graphene and the polyester fiber is improved, so that the mechanical property of the polyester yarn is improved.

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.

A foam is obtained by foaming a resin composition, which comprises a hydroxyl-terminated hydrogenated styrenic block copolymer of (A-B)n-OH, (B-A)n-OH, A(B-A)n-OH, or B(A-B)n-OH having a hydroxyl group at the terminal; wherein the A block comprises a styrene monomer unit and the B block comprises a conjugated diene monomer unit; wherein the hydroxyl-terminated hydrogenated styrenic block copolymer comprises 10˜60% by weight of the styrene monomer unit; 40 mol % or more of the conjugated diene monomer unit is hydrogenated; and the hydrogenated styrenic block copolymer has a weight average molecular weight of about 30000 to about 200000; the 1,2-vinyl bond content in the conjugated diene monomer unit of the hydroxyl-terminated hydrogenated styrenic block copolymer is in the range of 5 to 60 mole % prior to hydrogenation.

The invention relates to nylon with excellent heat-conducting property and a preparation method, and belongs to the technical field of nylon materials. The nylon comprises nylon resin, a modified heat-conducting filler, a compatilizer, an antioxidant and a lubricant. The preparation method of the modified heat-conducting filler comprises the following steps: putting a mixed material into water, stirring, performing ultrasonic dispersion, adding aluminum nitrate hexahydrate, heating, purifying, and drying to obtain a composite filler; stirring and dispersing the composite filler and ethanol, adding a silane coupling agent, stirring, purifying and drying to obtain an intermediate; and stirring and mixing the intermediate and ethanol, adding styrene, a monomer and an initiator, heating and stirring, purifying, and drying to obtain the product. The nylon resin is adopted as a matrix, boron nitride, aluminum oxide and graphene nanosheets are combined and organically modified, and maleic anhydride grafted polypropylene is used as a compatilizer, so that the heat-conducting property and the comprehensive mechanical property of the nylon tube are effectively improved.

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 a waterproof anti-cracking JS coating, an emulsion for the JS coating and a preparation method of the emulsion, and belongs to the field of waterproof coatings. The emulsion for the waterproof and anti-cracking JS coating comprises deionized water, n-butyl acrylate, styrene, 2-ethylhexyl acrylate, acrylamide, 1-2 parts of 2-hydroxyethyl acrylate, methacrylic acid, a functional aid, a defoaming agent, an emulsifier, a bactericide, an initiator, an oxidant, a reducing agent, a buffering agent and a pH regulator. According to the emulsion for the waterproof and anti-cracking JS coating, the acrylate monomer and the styrene monomer are matched for use, so that the glass-transition temperature of the emulsion for the waterproof and anti-cracking JS coating is between-30 DEG C and-20 DEG C, and flexibility can be provided for the waterproof and anti-cracking JS coating containing the emulsion; the cracking risk caused by cement shrinkage in the drying and film forming process of the waterproof anti-cracking JS coating is reduced, so that the waterproof anti-cracking JS coating can play a waterproof role for a long time.

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

This invention relates to a polymer polyol comprising: (a) a dispersed phase formed by polymeric particles which are the polymerization product of a polystyrene pyrolysis oil, and acrylonitrile; or alternatively, of a polystyrene pyrolysis oil, acrylonitrile, and styrene monomer; and (b) a continuous phase comprising (b1) a polyol, to compositions comprising or made from the polymer polyol, such as polyurethane (foams). The invention also relates to a process for preparing polymer polyols using pyrolysis oil of polystyrene; as well as processes for the preparation of the compositions comprising or made from the polymer polyol.

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.

The invention discloses a continuous fiber reinforced modified polyphenyl ether thermoplastic composite material foam sandwich structure plate and a preparation method thereof, and the continuous fiber reinforced modified polyphenyl ether thermoplastic composite material foam sandwich structure plate is a sandwich structure composed of a continuous fiber fabric as a reinforcement, modified polyphenyl ether thermoplastic resin as a matrix and polyphenyl ether foam, the modified polyphenyl ether thermoplastic resin comprises polyphenyl ether powder, vinyl modified polyphenyl ether, a styrene monomer, a flame retardant and an auxiliary agent, the materials are uniformly mixed to be in a daub shape and then are rolled until the thickness is uniform, and the obtained mixed resin material sheet, polyphenyl ether foam and the continuous fiber fabric are sequentially paved and then are subjected to in-situ polymerization pressing under the conditions of high temperature and high pressure to obtain the composite material. According to the method, in-situ polymerization compression molding is adopted, the number of production pieces in unit time is increased under the conditions that polymerization time is not shortened and the high polymerization degree is guaranteed, the productivity is improved to a large extent, and therefore the mass production requirement is met.

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.

A rubber composition for a tire contains: 100 parts by mass of a diene rubber containing ≥55 mass % of styrene-butadiene rubber; and ≥15 parts by mass of thermoplastic resin. The styrene-butadiene rubber has a glass transition temperature of ≤−55° C. and a total amount of a styrene monomer-derived unit and a vinyl monomer-derived unit of ≤50 mol %. Tga−Tgm≤10° C., where Tga is a theoretical glass transition temperature of a mixture of the diene rubber and the thermoplastic resin, blended at a mass ratio of 1:1, and Tgm is a measured glass transition temperature of the mixture. tan δMAXA / tan δMAXB>0.8 is satisfied, where tan δMAXA is a loss tangent maximum value at −40° C. to 60° C. of the rubber composition and tan δMAXB is a loss tangent maximum value at −40° C. to 60° C. of a rubber composition B where the thermoplastic resin of the rubber composition is replaced with oil.

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 invention discloses a high-salt-spray-resistance air-drying acrylate emulsion, a raw material composition thereof, a preparation method and application thereof, and the high-salt-spray-resistance air-drying acrylate emulsion comprises the following components in parts by weight: 480-500 parts of deionized water, 410-460 parts of acrylate and / or styrene monomers, 4-7 parts of polymerizable acrylic phosphate monomers, 3-7 parts of polymerizable ureido monomers and 3-10 parts of modified epoxy resin, 12-20 parts of an emulsifier, 2-4 parts of an initiator, 1-1.4 parts of a buffering agent, 0.5-1 part of an oxidizing agent, 0.3-0.8 part of a reducing agent and 4-6 parts of a neutralizing agent. A coating film of the high-salt-spray-resistance self-drying acrylate emulsion prepared by the preparation method has excellent salt spray resistance, relatively good adhesive force and impact resistance and relatively good stability.

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.

Provided is an ink composition containing a water-insoluble colorant, a dispersant, a resin A, a resin B, and water, the resin A being a resin obtained by polymerizing at least a C1-C4 alkyl methacrylate and a C2-C6 alkyl acrylate, and the resin B being a resin obtained by polymerizing at least a styrene monomer and divinyl benzene. In addition, the present invention provides an ink jet recording method using the ink composition, a recording medium to which the ink composition is adhered, and an ink jet printer provided with a container filled with the ink composition.

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.

The invention discloses a production method of ASA special rubber powder, and relates to the technical field of chemical production, and the production method comprises the following steps: feeding a composite emulsifier, a first initiator, an auxiliary agent and deionized water into a reaction kettle, and stirring; then adding an acrylate monomer, a cross-linking agent and a grafting agent into the reaction kettle, and continuously feeding nitrogen into the reaction kettle at the same time; stirring and mixing an acrylate monomer, a cross-linking agent, a grafting agent and a second initiator to prepare polyacrylate latex; feeding the polyacrylate latex, a chelating agent, a third initiator, a styrene monomer, an acrylonitrile monomer, a reducing agent and deionized water into a stirring kettle to prepare ASA latex; a surface treating agent, a coagulant, ASA latex, glass fiber powder and deionized water are fed into a coagulation kettle, and the ASA special rubber powder is prepared after spray drying. Therefore, under the action of the cross-linking agent and the grafting agent, the prepared ASA special rubber powder forms a core with a long-chain cross-linked network, and the tensile strength of a final product is greatly improved.

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.