168 results about "Pentaerithrityl" patented technology

The application belongs to the technical field of daily chemical industry, and particularly relates to an emulsion and a preparation method thereof. The emulsion provided in the application comprises an emulsifier, glycerol, oil-phase active substance, pentaerythritol tetra(ethylhexanoate) and water; the emulsifier is a lipopeptide; the weight percentage of the lipopeptide and the glycerol is not less than 3%; the weight ratio of the oil-phase active substance and the pentaerythritol tetra(ethylhexanoate) is 1:3-10; the ratio of the sum of the weights of the lipopeptide and the glycerol to the sum of the weights of the oil-phase active substance and the pentaerythritol tetra(ethylhexanoate) is 1:3-10; and the ratio of the sum of the weights of the lipopeptide, the glycerol, the oil-phase active substance and the pentaerythritol tetra(ethylhexanoate) to the weight of the water is 1:1-4. The emulsion is prepared by using sodium bacillomycin, glycerol and pentaerythritol tetra(ethylhexanoate), can effectively inhibit the diffusion of the oil-phase active substance at the interface of the emulsion, reduce the oxidative degradation of the oil-phase active substance, and greatly prolong the effective action time of the oil-phase active substance in the emulsion.

The invention relates to high-adhesion weather-resistant water-based ink and a preparation process thereof, and relates to the field of ink materials and preparation, and the high-adhesion weather-resistant water-based ink is prepared from the following raw materials in parts by mass: 25-40 parts of waterborne polyurethane, 10-20 parts of waterborne acrylate, 35-50 parts of water-based color paste, 1-4 parts of auxiliaries and water; the water-based acrylate is obtained through emulsion polymerization, and polymeric monomers comprise epoxy acrylate, hydroxyethyl acrylate, pentaerythritol tetraacrylate and acrylic acid; the epoxy acrylate comprises fatty acid modified epoxy diacrylate. The preparation method comprises the following steps: adding the water-based polyurethane resin and the water-based acrylate into water, stirring, adding the water-based color paste, stirring, adding the auxiliary agent, stirring, adjusting the viscosity, stirring, and filtering to obtain the high-adhesion weather-resistant water-based ink. The water-based ink has the effect of improving the adhesive force and weather resistance of the water-based ink.

The invention relates to the technical field of coatings, discloses a multifunctional fireproof and waterproof polysiloxane coating and a preparation method thereof, and aims at solving the problems that the hydrophobic function of an existing fireproof and waterproof polysiloxane coating is irreversibly lost after a fire disaster, and the fireproof and waterproof synergistic performance is remarkably attenuated in a medium-high-temperature environment. Hydroxyl-terminated methyl phenyl siloxane is used as matrix resin, and is matched with a flame-retardant system composed of melamine modified ammonium polyphosphate, pentaerythritol and amino modified nano-montmorillonite, a hydrophobic repair system composed of polysiloxane capsule wall fluorosilane microcapsules, an interface modifier compounded by an epoxy group and an amino silane coupling agent, and a special auxiliary agent. A three-dimensional covalent network is constructed to anchor all the components, efficient charring and temperature response type hydrophobic repair are achieved, the finished product is prepared through microcapsule preparation, modified flame retardant compounding and coating main body blending, and the finished product has excellent fireproof and waterproof performance, a renewable hydrophobic function after a fire disaster and stable performance at medium and high temperatures and is suitable for industrial long-term protection scenes.

The invention relates to the field of composite materials, and discloses a ceramic fiber reinforced composite aerogel material and a preparation method thereof.The ceramic fiber reinforced composite aerogel material is prepared from ceramic fibers, fumed silica, an aerogel precursor, modified aerogel powder and other raw materials through a sol-gel combined special drying technology; the flame-retardant fireproof coating is formed by spraying and curing slurry prepared from potassium silicate, silicone acrylic emulsion, modified ammonium polyphosphate, pentaerythritol, aluminum hydroxide, expanded vermiculite and fumed silica, and modified aerogel powder is prepared by dipping a silicon dioxide precursor solution into reduced graphene oxide aerogel; the modified ammonium polyphosphate is prepared by synergistically assembling activated ammonium polyphosphate and chitosan, combining with mercaptopropyltrimethoxysilane and then grafting octavinyl-POSS (Polyhedral Oligomeric Silsesquioxane). The prepared ceramic fiber reinforced aerogel material has the characteristics of high temperature resistance, light weight and high strength; the flame-retardant fireproof coating improves the antifouling self-cleaning effect, the fire endurance and the heat insulation performance of the material.

A geopolymer precursor includes an alkaline reactive solid material containing aluminum, silicon, and oxygen, and a fluid loss control material having an ionic stability property that has a first value in water and a second value in a 3M solution of NaOH, wherein a ratio of the second value to the first value is in a range of 0.5 to 2.0. The fluid loss control material may be, or may include a crosslinked polymer, which may include a reaction product of one or more of acrylamide, 2-acrylamido-2-methyl propane sulfonic acid, N,N‑dimethylacrylamide, N,N‑diethylacrylamide, vinyl acetate, or another monomer, and a crosslinker including one or more of methylene bisacrylamide, triallyl amine, pentaerythritol allyl ether, triallyl-triazine-trione, or another material. The geopolymer precursor may include an activator, an alkaline solution having pH of at least about 9, or both.

The invention relates to the technical field of petroleum drilling fluid loss reduction, and discloses an anti-divalent salt fluid loss agent for drilling fluid, which is prepared by the following steps: step 1, beta-cyclohexylamine and 6-chloro-1-hexene are subjected to a reaction to obtain alkenyl beta-cyclohexylamine; step 2, initiating polymerization of alkenyl beta-cyclopentadiene, a hyperbranched monomer pentaerythritol triallyl ether and 2-acrylamide-2-methylpropanesulfonic acid under the action of azobis (isobutylamidine hydrochloride), so as to obtain an intermediate A; 3, 3-dimethylamino-1-propylamine and palmitic acid are subjected to a reaction, and an intermediate 2 is obtained; 4, the intermediate 2 and benzyl chloride are subjected to a reaction, and quaternary ammonium salt modified fatty acid is obtained; and 5, stirring and mixing the intermediate A, quaternary ammonium salt modified fatty acid and coupling agent modified walnut powder to obtain the divalent salt resistant filtrate reducer for the drilling fluid. The anti-divalent salt filtrate reducer for the drilling fluid has a relatively good anti-divalent salt effect.

The invention belongs to the technical field of chemical production, and particularly relates to a novel process for separating pentaerythritol by a membrane method and application of the novel process. The membrane separation comprises the steps of separating sodium formate by using an ion exchange membrane and separating pentaerythritol by using a low-pressure nanofiltration membrane device. The dealdehyding liquid is separated through different membranes, and formic acid, pentaerythritol, dipentaerythritol and other substances can be effectively separated. The process greatly shortens the process flow and saves the cost. According to the technical scheme, the quality and performance of the pentaerythritol product are remarkably improved, the added value of the product is increased, and a new technical scheme is provided for industrial production of pentaerythritol.

The invention provides a preparation method of photocatalytic hydrogel, belongs to the technical field of photocatalysis, and aims at solving the problems that traditional hydrogen production is high in energy consumption and pollution, and existing photocatalytic hydrogel is low in purity and unstable in performance. The method comprises the following steps: firstly, preparing seven precursors of CPDT-1, CPDT-2Br-SO3Na, PCT-SO3Na, Flu-2Br-SO3Na, PFT-SO3Na, PCBT-SO3Na and PFBT-SO3Na step by step, and carrying out nitrogen purging to prevent oxidation, acetone precipitation, recrystallization and Soxhlet extraction and purification in the process; the four active precursors are mixed with acrylic acid, pentaerythritol triallyl ether and (2, 4, 6-trimethylbenzoyl) diphenyl phosphine oxide respectively, the mixture is subjected to 365nm ultraviolet irradiation polymerization, and four photocatalytic hydrogels are prepared. The method has the advantages of mild conditions, controllable operation, high product purity and stable photocatalytic performance, and is suitable for hydrogen energy preparation and water pollution treatment.

The application belongs to the technical field of oil exploitation, and particularly relates to a temporary plugging agent for fracturing acidification and a preparation method thereof. The preparation method is as follows: in a reactor, itaconic acid, p-styrene sulfonic acid, 2-allyloxy methyl-2-hydroxymethyl propane-1,3-diol, vinyl pyridine, pentaerythritol diacrylate, buffer salt and deionized water are sequentially added, stirring is conducted, the pH value is adjusted, and all raw materials are completely dissolved; an initiator is added from a high-position dropping tank, the reaction is automatically heated, the reaction is kept, a reducing agent is added, the reaction is terminated, the pH value is adjusted, and a temporary plugging agent solution is obtained; the temporary plugging agent solution is dried and granulated to obtain the product temporary plugging agent. The preparation method has the characteristics of simple synthesis process and no by-products; the temporary plugging agent has the advantages of large water absorption, large plugging strength, high breakthrough pressure, self-degradation and designable degradation time.

The invention discloses weather-resistant and medium-resistant alkyd resin varnish and a preparation method thereof. The varnish is prepared from the following raw materials: modified alkyd resin, a composite drier, zirconium iso-octoate with the purity of 12%, an anti-skinning agent, 200 # solvent oil and xylene. The modified alkyd resin is prepared from the following raw materials: soya oil acid, pentaerythritol, benzoic acid, pyrrolidine-2-one-1-acetic acid, dimethylbenzene and a 200 # solvent. According to the invention, pyrrolidine-2-ketone-1-acetic acid is used as a binary acid component to partially or completely replace traditional phthalic anhydride, so that the reaction efficiency of alkyd resin synthesis can be improved, and the problems of yellowing, pulverization and poor water resistance of traditional alkyd resin can be solved; according to the varnish prepared by the invention, on the basis of maintaining the inherent gloss, flexibility and constructability of alkyd resin, the key properties such as weather resistance, water resistance and acid resistance are improved; the whole preparation process of the varnish continues to use mature alkyd resin production equipment and flow, and has good economical efficiency and industrial popularization prospects.

An electric driveline fluid is described. The fluid comprises an oil of a major lubricating viscosity, an electric driveline additive including glycerol, glycol, glycol ether, pentaerythritol, vicinal diol, triol, or derivatives thereof, and at least one overbasic sulfonate detergent. The amount of the electric driveline additive is approximately 0.001% to approximately 1.5% by weight, based on the total weight of the electric driveline fluid.

The present invention belongs to the technical field of daily chemical industry, and specifically relates to an emulsion and a preparation method thereof. The emulsion provided by the present invention comprises an emulsifier, glycerol, an oil-phase active substance, pentaerythrityl tetra(ethylhexanoate) and water; wherein the emulsifier is a lipopeptide; the weight percentage of the lipopeptide relative to glycerol is not less than 3%; the weight ratio of the oil-phase active substance to pentaerythrityl tetra(ethylhexanoate) is 1:(3 to 13); the ratio of the total weight of the lipopeptide and glycerol to the total weight of the oil-phase active substance and pentaerythrityl tetra(ethylhexanoate) is 1:(3 to 10); and the ratio of the total weight of the lipopeptide, glycerol, oil-phase active substance and pentaerythrityl tetra(ethylhexanoate) to the weight of water is 1:(1 to 4). By compounding sodium surfactin with glycerol and pentaerythrityl tetra(ethylhexanoate), the emulsion can effectively inhibit the diffusion of the oil-phase active substance at an emulsion interface, reduce the oxidative degradation of the oil-phase active substance, and greatly prolong the effective action time of the oil-phase active substance in the emulsion.

The application relates to the field of polyurethane hot melt adhesives, and particularly discloses a luggage wet-curing reaction type polyurethane hot melt adhesive and a preparation method thereof; the luggage wet-curing reaction type polyurethane hot melt adhesive comprises the following raw materials in parts by weight: 10-20 parts of polyether polyol, 40-60 parts of polyester polyol, 20-50 parts of isocyanate, 0.5-1.5 parts of a catalyst, 10-20 parts of tackifying resin, 3-5 parts of a viscosity stabilizer, 1-3 parts of pentaerythritol diacrylate, 5-10 parts of an additive, and 3-5 parts of a coupling agent; the luggage wet-curing reaction type polyurethane hot melt adhesive prepared by the application is prepared by reacting polyether polyol, polyester polyol and isocyanate to generate a polyurethane prepolymer, so that the hot melt adhesive has good flexibility and durability; the tackifying resin, the pentaerythritol diacrylate and the viscosity stabilizer are used to enable the polyurethane hot melt adhesive to have good initial adhesion and final adhesion strength, and the polyurethane hot melt adhesive can form firm adhesion with a base material more quickly.

The invention relates to the technical field of high polymer materials, and particularly discloses a high-strength polyurethane adhesive as well as a preparation method and application thereof. The adhesive is prepared by compounding a double-bond-terminated polyurethane prepolymer monomer and a multi-sulfydryl cross-linking agent. And the prepolymer monomer is synthesized by reacting 4, 4-diisocyanate dicyclohexylmethane and hydroxyethyl (meth) acrylate according to a molar ratio of 1: 2. The polythiol cross-linking agent is tetrakis (3-mercaptopropionic acid) pentaerythritol ester or tetrakis (2-mercaptoacetic acid) pentaerythritol ester. When in use, the two components are mixed and then coated on a base material, and the mixture is cured at 30-100 DEG C for 0.5-5 hours. The adhesive disclosed by the invention forms a compact network through multiple crosslinking mechanisms such as sulfydryl-alkene Michael addition, so that the adhesive has extremely high shear strength (up to more than 30MPa) and excellent heat resistance and aging resistance on metal, glass, glass fiber plates and the like.

A synthetic fiber is disclosed, formed from a composition which is made of from about 1 to about 98 weight percent of at least one polyhydroxyalkanoate; from about 1 to about 10 weight percent of at least one nucleating agent selected from the group consisting of polyester waxes, behenamide, crodamide, stearamide, erucamide, pentaerythritol, dipentaerythritol, boron nitride, and mixtures thereof; and from about 0.1 to about 5 weight percent of at least one melt flow modifier selected from the group consisting of calcium stearate, zinc stearate, starch, diamide oligomers, organic peroxides, and mixtures thereof.

The invention discloses a preparation method of an efficient fireproof and flame-retardant coating for wires and cables, and belongs to the technical field of wire and cable coatings. Aiming at the defects of low flame-retardant efficiency, poor high-temperature-resistant stability and insufficient environmental protection property of the existing coating, performance breakthrough is realized through an innovative formula and process design. The flame-retardant coating comprises the following components in parts by weight: 30-40 parts of acrylate resin, 20-30 parts of a composite flame-retardant system (compounded by modified magnesium hydroxide, ammonium polyphosphate and pentaerythritol phosphate according to a ratio of 5: 3: 2), 1.5-3 parts of a high-temperature-resistant modified component, 4-6 parts of an environment-friendly coalescing agent (compounded by polyethylene glycol monomethyl ether and tributyl citrate according to a ratio of 1: 1), other auxiliaries and deionized water. The preparation method comprises the steps of raw material pretreatment, stepped stirring and mixing, and grinding by a sand mill. The flame-retardant grade of the prepared coating reaches grade A, the coating is free of cracking and falling at the high temperature of 1300 DEG C, VOC is smaller than or equal to 10 g / L, no heavy metal is detected, meanwhile, the adhesive force reaches grade 1, the flexibility is larger than or equal to 0.8 mm, the problem that multiple properties are difficult to consider in the prior art is solved, and the coating is suitable for coating of various high-low voltage electric wires and cables.

The utility model relates to the technical field of biochemical manufacturing equipment, in particular to a pentaerythritol mother liquor extraction tower. Comprising a tower body assembly, a feeding assembly and a pressurizing assembly, the tower body assembly comprises an extraction tower main body and a first assembly ring, the feeding assembly comprises a feeding tower, the pressurizing assembly comprises a hydraulic cylinder, the lower end of the feeding tower is connected with a material guide pipe, the output end of the hydraulic cylinder is connected with a linkage rod, the outer wall of the linkage rod is connected with a sleeving pipe, and the sleeving pipe is connected with a first assembly ring. The outer wall, away from the linkage rod, of the sleeving pipe is connected with a pressurizing plate. When raw materials are added into the material guiding pipe from the material guiding pipe, the hydraulic cylinder runs to drive the pressurizing plate to do reciprocating motion through the linkage rod, the raw materials in the material guiding pipe are pressurized in the process, the raw materials in the material guiding pipe flow out through a mixing groove formed in the pressurizing plate, and circulating pressurizing is carried out through reciprocating motion of the pressurizing plate; furthermore, after the raw materials flow into the extraction tower main body, the target product is separated from the mother liquor.

Symmetric Star Poly(Substituted Glycolide) Homopolymers and Their Surface Properties The invention include the synthesis, thin film formation, surface properties, and comprehensive analysis of star-shaped well-defined symmetric poly(substituted glycolide) (s-PSG) homopolymers, which are alternatives to polylactides and polyglycolides. Four-armed symmetric poly(L-diisopropyl glycolide) (4s-PLDIPG) and poly(L-diisobutyl glycolide) (4s-PLDIBG) prepared by ring opening polymerization (ROP) under melt conditions with tin (II) 2- ethylhexanoate catalyst and pentaerythritol initiator exhibited high conversions (92-98%) and desirable PDI values (1.23-1.49). The NMR data of all s-PSGs showed that the methylene peaks of pentaerythritol were shifted, proving that polymerization took place in all arms. The molecular weights (Mn NMR, Mw GPC, Mn GPC) of s-PSGs determined by NMR and GPC data were consistent with the theoretical values. By increasing the side chain length of s-PSG homopolymers, there was a consistent increase in the water contact angles and surface roughness values of the thin films, whereas the surface free energy diminished.

The invention provides POE (Polyolefin Elastomer) type refrigerating machine oil adaptive to an R32 refrigerant and a preparation method of the POE type refrigerating machine oil. The preparation method comprises the following steps: firstly, carrying out first-stage esterification reaction on pentaerythritol, aromatic acid, C14-C18 straight-chain fatty acid and a first part of C4-C8 branched-chain fatty acid under the action of a solid acid catalyst; and then adding a second part of C4-C8 branched chain fatty acid to carry out second-stage esterification reaction to obtain the POE type refrigerating machine oil, the molar ratio of the pentaerythritol to the aromatic acid to the C14-C18 straight-chain fatty acid to the first part of the C4-C8 branched-chain fatty acid is 1: (0.5-1.5): (0.5-0.8): (0.5-1.0); and the molar ratio of the pentaerythritol to the second part of C4-C8 branched chain fatty acid is 1: (1.2-2.2). The refrigerating machine oil has good intermiscibility with an R32 refrigerant.

The present application relates to the technical field of high polymer, in particular to a kind of anti-aging high-performance composite material and its injection molding process.The acidized spirocyclic phosphate is prepared by adding phosphorus oxychloride, pentaerythritol and formic acid.A kind of composite flame retardant is prepared by mixing reaction of acidized spirocyclic phosphate, phosphorus heteroheptacyclo-acrylamide double bond derivative, phosphorus heteroheptacyclo-allyloxy double bond derivative and phosphorus hetero-link-benzenediol diallyl double bond derivative.Then, high-performance composite material is obtained by adding polypropylene, acrylonitrile-butadiene-styrene copolymer, compatibilizer, inorganic filler, antioxidant, anti-aging agent, composite flame retardant and lubricant, and by melt extrusion and granulation.The high-performance composite material is injection molded to obtain finished product.The finished product prepared by the present application has good flame retardancy, anti-aging property and mechanical property, so it has wide application prospect in the technical field of high polymer.

The invention relates to the technical field of synthesis of organic compounds, and discloses a synthesis method of boclean flood aldehyde, which is characterized in that 4-tert-butylstyrene is used as a raw material, and the boclean flood aldehyde is prepared through one-step hydroformylation reaction. Rh (CO) 2C5H7O2 and bis (2, 4-dicumyl phenyl) pentaerythritol diphosphite form a composite catalyst, the composite catalyst is matched with triethylamine organic alkali to react under specific process conditions, and a pure product is obtained through vacuum distillation. The method has the advantages of simple process, mild reaction conditions, raw material conversion rate of more than 98%, product yield of more than 80%, purity of more than 98%, easy reagent recovery and small environmental harm, and is suitable for industrial large-scale production.

The invention provides a novel production method of pentaerythritol, which relates to the technical field of chemical products, and comprises the following steps: proportioning formaldehyde, acetaldehyde and lithium hydroxide, mixing, carrying out condensation reaction, and adding formic acid to neutralize the solution after the reaction; collecting the neutralized solution, carrying out rectification treatment, and separating out crystals; carrying out centrifugal treatment on the separated crystals, and then putting the crystals into a washing tank for washing; drying to obtain a pentaerythritol finished product; precipitating the mother liquor, washing and refluxing the filtered solution, and mixing the filtered solution with the dealdehyding solution for cyclic utilization; and concentrating, crystallizing, centrifuging, washing and drying the filtrate to obtain a lithium formate product. According to the production method of the pentaerythritol by the lithium method, the reaction conversion rate is high, and the product quality is excellent; the added value is high, and the overall economy of the production process is good; the mother liquor is completely circulated in a closed manner, and is pollution-free and environment-friendly. The automation degree is high, and the washing, overturning and discharging processes can be completed only through single power equipment.

The invention relates to a continuous preparation method of pentaerythritol bisulfite, which comprises the following steps: respectively and continuously introducing pentaerythritol emulsion and thionyl chloride into a continuous flow oscillation stirring reactor for continuous flow reaction, controlling the reaction temperature to be 40-90 DEG C, controlling the temperature to be 40-90 DEG C, and controlling the reaction time to be 1-3 hours; the stirring rotating speed is 200 to 800 r / min, the reaction pressure is 0.3 to 0.8 MPa, and the reaction time is 30 to 120 minutes. By using the continuous flow oscillation stirring reactor and specific reaction conditions, the continuous preparation is realized, and the pentaerythritol conversion rate, the product yield and purity, the reaction efficiency and the post-treatment simplicity are considered at the same time. The method has the remarkable advantages of simple process, low reaction operation difficulty, high reaction efficiency and the like, and can meet the comprehensive requirements of large-scale continuous industrial production on efficiency, cost and product quality.

The application belongs to the technical field of synthesis of dipentenyl diphosphite dioctadecyl ester, and discloses a hydrophobic double-base composite catalyst and a synthesis method of distearyl dipentenyl diphosphite. The hydrophobic double-base composite catalyst comprises a carrier, wherein the carrier is a hollow mesoporous silica sphere; an octadecyl hydrophobic chain, wherein the octadecyl hydrophobic chain is fixed on the surface and / or in the pores of the carrier through Si-O-Si bonds; an organic guanidino base site, wherein the organic guanidino base site is covalently fixed on the surface and / or in the pores of the carrier through a C3-C6 alkyl connecting arm; and a magnesium-aluminum composite basic component, wherein the magnesium-aluminum composite basic component is distributed on the surface and / or in the pores of the carrier in a deposition, in-situ growth or impregnation manner. The catalyst can promote P-Cl bond alcoholysis substitution reaction, enrich long-chain alcohol substrates, and can be cooperated with HCl gas stripping or micro-negative pressure removal process to reduce residual acidic components in the local microenvironment of the catalyst, so that the antioxidant 618 product with low acid value, low heating reduction and high stability can be prepared.

This application belongs to the technical field of daily chemical industry, and specifically relates to emulsions and methods for preparing the same. The emulsion provided in this application contains an emulsifier, glycerin, an oil-phase active substance, pentaerythritol tetra(2-ethylhexanoic acid) ester, and water, wherein the emulsifier is a lipopeptide, the weight percentage of lipopeptide to glycerin is 3% or more, the weight ratio of the oil-phase active substance to pentaerythritol tetra(2-ethylhexanoic acid) ester is 1:3 to 13, the ratio of the total weight of lipopeptide and glycerin to the total weight of the oil-phase active substance and pentaerythritol tetra(2-ethylhexanoic acid) ester is 1:3 to 10, and the ratio of the total weight of lipopeptide, glycerin, oil-phase active substance, and pentaerythritol tetra(2-ethylhexanoic acid) ester to the weight of water is 1:1 to 4. By using this emulsion in combination with surfactant sodium, glycerin, and pentaerythritol tetra(2-ethylhexanoic acid) ester, the diffusion of oil-phase active substances at the emulsion interface is effectively suppressed, reducing oxidative degradation of oil-phase active substances and significantly extending the effective duration of the oil-phase active substances in the emulsion.

Disclosed is a synthetic fiber formed from a composition made from about 1 to about 98 weight percent of at least one polyhydroxyalkanoate; about 1 to about 10 weight percent of at least one nucleating agent selected from the group consisting of polyester wax, behenamide, crodamide, stearamide, erucamide, pentaerythritol, dipentaerythritol, boron nitride, and mixtures thereof; and about 0.1 to about 5 weight percent of at least one melt flow modifier selected from the group consisting of calcium stearate, zinc stearate, starch, diamide oligomers, organic peroxides, and mixtures thereof.

The application provides a preparation method of pentaerythritol phosphate, which uses pentaerythritol and phosphoric acid as reaction raw materials, and esterifies under the action of a polar aprotic solvent and a nano TiO2 / WO3 composite material to generate pentaerythritol phosphate. The purity of the pentaerythritol phosphate is greater than or equal to 99.0%, the yield is greater than or equal to 95%, the nano TiO2 / WO3 composite material is easy to recover, and the nano TiO2 / WO3 composite material can be reused more than three times. The preparation method in the application has mild reaction conditions, low energy consumption, and the solvent can be partially recovered, is green and environment-friendly, has high product purity, and does not need a complex purification step.

The application discloses an anti-aging and yellowing-resistant foamed polyester material and a preparation method thereof, and relates to the technical field of polyester materials. The anti-aging and yellowing-resistant foamed polyester material is prepared from the following raw material components in proportion by weight: 3-5 parts of anti-ultraviolet SEBS, 3.6-7 parts of triethylamine, 4-6 parts of a flame-retardant and wear-resistant filler, 100 parts of TPEE, 0.9-1.1 parts of a polymer wax, and 0.6-0.8 parts of a foaming agent. The anti-ultraviolet SEBS is obtained by copolymerization grafting of an unsaturated benzophenone ultraviolet absorber, SEBS and maleic anhydride. The flame-retardant and wear-resistant filler is obtained by mixing and reacting carboxylated nano silicon dioxide, pentaerythritol and phosphorus oxychloride. The polymer wax is EVA wax. The foaming agent is azodicarbonamide. The anti-aging and yellowing-resistant foamed polyester material has good mechanical properties, anti-aging performance, flame-retardant performance and compression resistance.

The invention relates to the technical field of pentaerythritol mother liquor recovery, and particularly discloses a process and a system for separating pentaerythritol and sodium formate from pentaerythritol mother liquor, and the process comprises the following steps: S1, adjusting the pH value of pentaerythritol synthesis mother liquor to 6.5-7.5, and adsorbing and decolorizing through activated carbon; s2, concentrating the pretreated mother liquor until the specific gravity is 1.25-1.35 g / cm < 3 >, and performing programmed cooling crystallization and centrifugal separation to obtain crude pentaerythritol crystals and centrifugal mother liquor; s3, taking sulfonic cation exchange resin as a stationary phase and 10-30% ethanol aqueous solution as a mobile phase, and continuously separating to obtain a high-purity sodium formate solution and a tripentaerythritol enriched solution.

This invention relates to the field of polymer materials technology, specifically to a modifier for improving the hardness of PC resin and a method for preparing the modified PC resin. The method for preparing the modifier for improving the hardness of PC resin includes the following steps: S1, under nitrogen protection, terephthalic acid, pentaerythritol triacrylate, a catalyst, and a polymerization inhibitor are added to toluene to react and obtain a compound; S2, the compound obtained in step S1 and the polymerization inhibitor are added to acetone and stirred, then nitrogen is introduced, and glycidyl methacrylate and N,N-dimethylbenzylamine are added to react and obtain a product; S3, under nitrogen protection, the product obtained in step S2 is copolymerized with acrylate monomers to obtain the modifier. The modifier prepared by this invention modifies PC resin, resulting in modified PC resin with high hardness and transparency.