25 results about "Polyol synthesis" patented technology

The invention relates to a process for the synthesis of a polymer of polyol, preferably glycerol, and polycarboxylic ester units, preferably dicarboxylic diester units, in particular sebacic diester units, in particular PGS, comprising the introduction of a heterogeneous basic catalyst. The invention also relates to a polymer obtainable by this process. The invention also relates to a polyester of polyol and dicarboxylic diester having a high average molar mass, a controlled degree of branching and the absence of trace metals.

A method for preparing and applying a composite polyurea anti-corrosion and thermal insulation material. This belongs to the field of chemical technology. It comprises two components, A and R. Component A includes 65-75 parts of a prepolymer synthesized from polyisocyanate and 25-35 parts of polyether polyol; component R includes 5-30 parts of a chain extender, 40-60 parts of terminal amino polyether, and 1-3 parts of a nano-modifier. Components A and R are mixed at room temperature. The composite polyurea anti-corrosion and thermal insulation material is layered and alternately sprayed with rigid polyurethane foam, and then compounded with a resin composite material to prepare a new high-strength composite material with single or multiple layers. It is the best thermal insulation material for corrosion protection and insulation of oilfield pipelines, oil storage equipment, and marine vessels.

The invention discloses a preparation method of polyether polyol for flatulence slow-rebound foam, and relates to the technical field of polyether polyol synthesis, and the preparation method comprises the following steps: S1, preparing an initiator: mixing glycerol and potassium hydroxide for reaction, dehydrating for 1-3 hours at 110-120 DEG C under vacuum condition to obtain potassium glycerol with the water content of less than or equal to 0.05%, and filtering to obtain the initiator; wherein the mass ratio of potassium hydroxide to glycerol is 1: (13-20); s2, carrying out two-stage polymerization reaction; and S3, refining treatment. In the middle stage of the reaction, the feeding proportion of the epoxide is changed, the proportion of the ethylene oxide is increased, and a non-ethylene oxide end-capping process is adopted to prepare the swellable slow-rebound polyether polyol. When the process is used for producing polyether, the reaction speed of epoxypropane in the early stage of reaction is higher, meanwhile, the situation that the production period is prolonged due to intermediate curing is avoided, and the production efficiency is improved. The polyether applying the process has better performance during foaming, has stronger adaptability to a formula, and avoids wettability reduction of foam and foam shrinkage during foaming caused by ethylene oxide end capping.

The application discloses a kind of for the synthesis of bio-based polyether polyol impact jet stirring reactor, it is related to reactor technical field, including reactor body, adjusting mechanism, charge air mechanism and stirring mechanism, the left end of the top of the reactor body is fixedly connected with the outer wall of adjusting mechanism, the left end of the reactor body is fixedly connected with charge air mechanism, the top center of the reactor body is fixedly connected with stirring mechanism, adjusting mechanism is by adjusting four groups of nozzle and shape change, change jet position and intersection, optimize flow field adaptation multiple raw materials;Guide mechanism adjusts the angle of guide vane and cooperates nozzle, double control flow field prevents uneven mixing;Charge air mechanism controls wave-shaped air bag by vacuum pump and piston rod, optimizes flow field to avoid scale formation;Stirring mechanism relies on part rotation and jet coordination, adaptation scale and promote gas-liquid mass transfer efficiency, finally improve synthesis efficiency, product uniformity and product quality.

The utility model discloses a dispersing agent feeding device for polymer polyol synthesis, including setting in the dispersing agent storage bin of the synthesis reation kettle body upper end, the dispersing agent storage bin lower extreme is provided with the conical feeding hopper, the conical feeding hopper lower extreme is provided with the jet flow plugging component, the dispersing agent storage bin top is hinged with the upper end cover, the utility model relates to polymer polyol synthesis technical field, and the dispersing agent for polymer polyol synthesis is added to the dispersing agent storage bin, buckles the upper end cover, and utilizes the locking positioner and locks the upper end cover with the dispersing agent storage bin, and while injecting the basic polyether into the reaction kettle, starts the electric push rod on the upper end cover, utilizes the electric push rod and pushes the support rod and the pressure plate downlink, thereby through the conical extrusion head and presses the dispersing agent in the dispersing agent storage bin downwards, under the action of pressure, the dispersing agent promotes the jet flow plugging component action, thereby along the dispersing agent and sprays into the reaction kettle in the inclined direction, and the dispersing agent distribution is more uniform.

The application relates to the technical field of data processing, in particular to a polycaprolactone polyol synthesis path optimization method based on a genetic algorithm, which comprises the following steps: constructing an adversarial framework with the genetic algorithm as a generator and a process stability discriminator; using a failure path deduction model to generate virtual failure data in a directional mode to solve a data sparsity problem and train the discriminator; quantifying the robustness risk of candidate process parameters through a virtual disturbance unit and taking the risk as a key part of a genetic algorithm fitness function; and simultaneously using the explainability analysis result of the discriminator to guide the mutation direction of the genetic algorithm. Through the above method, a process path with high performance and high robustness can be found, and the industrial practicability and decision efficiency of the optimization result are significantly improved.

The invention belongs to the field of composite materials, and relates to a method for preparing bio-based polyurethane by taking tannic acid as a raw material and modifying the surface of carbon fiber, which is characterized in that tannic acid is adopted to replace polyhydric alcohol which reacts with diisocyanate and is refined and derived from petroleum in the traditional thermoplastic polyurethane synthesis to synthesize a bio-based polyurethane polymer; the tannic acid is high in carbon content and can form an excellent carbon layer, and the formed carbon layer can play a role in isolating oxygen and heat in the combustion process, so that the bio-based polyurethane has high thermal stability and flame retardance, the mechanical property of the carbon fiber is effectively enhanced, the reaction process is mild and environment-friendly, and the method is suitable for industrial production. The method has a certain research value.

The invention relates to the technical field of polyhydric alcohol synthesis, and discloses a polyhydric alcohol synthesis multistage series continuous flow reactor which comprises a base, a reaction kettle is fixed on the upper side of the base, a discharging pump is fixedly arranged in the middle of the reaction kettle, a reaction pipe is fixedly arranged at the output end of the discharging pump, and the reaction pipe is connected with the discharging pump. A plurality of conveying pipes are symmetrically and fixedly arranged on the outer wall below the middle of the reaction kettle, a diffusion pipe and a mixing pipe which are located on the inner side and the outer side of the reaction kettle are fixed to the two ends of each conveying pipe respectively, a nozzle fixed to one end of a feeding pipe is arranged in each mixing pipe, and a circulating pump is fixedly arranged at the bottom of the reaction kettle. Through the circulating pump, the reaction kettle, the nozzle, the feeding pipe, the mixing pipe, the diffusion pipe and the stirring assembly, full mixing reaction of raw materials is realized, and through cooperation of the discharging pump and the reaction pipe, the raw materials are subjected to deep reaction in the flowing process, so that the functions of continuous feeding and discharging in the polyol synthesis process are realized, and the production efficiency is improved.

This invention belongs to the field of polyether polyol synthesis technology, specifically relating to bio-based high-strength polyether ester polyols and their preparation methods. The bio-based high-strength polyether ester polyol is obtained from the following raw materials: small molecule polyol, catalyst, bio-based epoxide, and bio-based phenyl ester compound; the bio-based epoxide is one or more of limonene epoxide, α-pinene oxide, and caryophyllene oxide; the bio-based phenyl ester compound is one or two of benzyl benzoate and benzyl cinnamate. The raw materials used in this invention can be obtained through natural plant extraction, achieving full bio-based polyether ester polyol production, thus fundamentally reducing dependence on fossil resources. By introducing a large number of cyclic and benzene ring structures into the polyol molecule, the resulting product is applied in the field of rigid polyurethane foam, increasing the content of rigid groups in the molecular chain structure, and significantly improving the strength of rigid polyurethane foam compared to traditional polyether polyols.

The invention belongs to the technical field of polyether polyol synthesis, and particularly relates to bio-based high-strength polyether ester polyol and a preparation method thereof. The bio-based high-strength polyether ester polyol is prepared from the following raw materials: micromolecular polyol, a catalyst, a bio-based epoxide and a bio-based phenyl ester compound, the bio-based epoxide is one or more of limonene epoxide, alpha-pinene oxide and caryophyllene oxide; the bio-based phenyl ester compound is one or two of benzyl benzoate and benzyl cinnamate. The raw materials can be extracted from natural plants, full bio-based polyether ester polyol is realized, dependence on fossil resources is more thoroughly reduced from the source, a large number of cyclic and benzene ring structures are introduced into polyol molecules, and the obtained product is applied to the field of rigid polyurethane foam plastics and has a wide application prospect. The content of rigid groups in a molecular chain structure is increased, and compared with traditional polyether polyol, the strength of rigid polyurethane foam can be greatly improved.

The invention relates to the technical field of polyol synthesis, and particularly discloses epoxy plant oil-based polyol and a preparation method thereof.The hydroxyl value of the epoxy plant oil-based polyol is larger than or equal to 300 mgKOH / g, the functionality degree of the epoxy plant oil-based polyol is larger than or equal to 3.0, an aliphatic ester chain segment of the epoxy plant oil-based polyol contains an aromatic acid ester branched chain, and the structure of the aromatic acid ester branched chain is shown in the specification. R1 is H or an alkyl group with 1-5 carbon atoms, R2 is H or an alkyl group with 1-5 carbon atoms, and R3 is an alkylene group with 1-4 carbon atoms. The epoxy plant oil-based polyol prepared by the invention does not need refining treatment, can be directly used as a raw material of rigid polyurethane foam, has better compatibility, can effectively improve the heat insulation property of rigid foam, and has better comprehensive foam properties such as specific strength and the like.

The invention relates to the technical field of polymer chemistry and catalysts, in particular to a high-stability double-metal cyanide catalyst for polyether polyol synthesis as well as a preparation method and application of the high-stability double-metal cyanide catalyst. According to the high-stability double-metal cyanide catalyst for polyether polyol synthesis, a complex system of the catalyst contains a stable protective agent, and the stable protective agent is an organic compound which simultaneously contains a benzene ring group and at least one functional group selected from an ester group and / or an ether bond in a molecular structure of the stable protective agent. According to the method, the post-treatment procedure of a traditional KOH method and the pre-polymerization seed production procedure of a DMC method are thoroughly omitted, the production process is shortened, the energy consumption is reduced, no waste salt is generated, and the economic and environment-friendly benefits are remarkable.

The invention discloses an impact type jet flow stirring reactor for bio-based polyether polyol synthesis, and relates to the technical field of reactors, the impact type jet flow stirring reactor comprises a reactor body, an adjusting mechanism, an air charging and exhausting mechanism and a stirring mechanism, the left end of the top of the reactor body is fixedly connected with the outer wall of the adjusting mechanism; the left end of the reactor body is fixedly connected with an air charging and exhausting mechanism, the center of the top of the reactor body is fixedly connected with a stirring mechanism, and an adjusting mechanism is adaptive to multiple raw materials by adjusting four groups of nozzles, changing shapes, changing jet flow positions and intersection points and optimizing a flow field; the flow guide mechanism adjusts the angle of a flow guide plate and is matched with a nozzle and a double-control flow field to prevent uneven mixing; the air inflation and exhaust mechanism controls a wavy air bag through a vacuum pump and a piston rod, a flow field is optimized, and scaling is avoided; the stirring mechanism adapts to the scale and improves the gas-liquid mass transfer efficiency by means of cooperation of component rotation and jet flow, and finally the synthesis efficiency, the product uniformity and the product quality are improved.

The invention relates to the technical field of catalysts, and discloses a high-efficiency catalyst for polyol synthesis and a preparation method thereof, the catalyst uses boron nitride with a hierarchical porous structure as a carrier, uses molybdenum and cobalt as active metal components, and performs surface modification through a specific organic ligand. The preparation method mainly comprises the following steps: carrier pretreatment, equivalent-volume impregnation loading of active components, temperature programming preliminary heat treatment, reduction activation under specific conditions, microwave-assisted surface modification and the like. The initial activity and selectivity of the catalyst are improved, it is guaranteed that the catalyst obtains high metal dispersity and excellent batch-to-batch stability, and the anti-sintering capacity and durability of the catalyst in the polyol synthesis reaction are improved.

The application discloses an aluminum-plastic composite film and a preparation method thereof. The aluminum-plastic composite film comprises an outer layer, a glue layer, an anticorrosion layer, an aluminum foil layer, an anticorrosion layer, a bonding layer and a heat-sealing layer. The glue layer comprises modified polyurethane, and the modified polyurethane comprises the following components according to weight parts: component A, 2-40 parts of polyhydric alcohol, 0.5-2 parts of an additive; component B, 10-60 parts of modified prepolymer, 2-4 parts of an additive and 1-5 parts of a filler. The modified prepolymer in the component B is obtained by using prepolymer grafted polymer microspheres, the prepolymer is obtained by synthesizing isocyanate and polyhydric alcohol, and the polymer microspheres comprise polymer microspheres of one or more groups of a silicon group and a double bond group. The glue layer prepared by the application can greatly improve the water resistance and heat resistance of the aluminum-plastic composite film, reduces the delamination phenomenon of the aluminum-plastic composite film and prolongs the service life of the aluminum-plastic composite film.

The application provides a preparation method and a process device of polyester polyol. Specifically, a two-stage membrane material assembly device is provided. The first stage is a PSF or PVDF coated base film assembly which is directly connected with a gas phase outlet of a polyester reaction kettle, can intercept small molecule alcohol ester in the gas phase reaction product, and refluxes to the reaction kettle. Water and other components generated by the reaction can pass through and enter the second stage separation membrane. The second stage is an adsorption de-aldehyde component modified pervaporation membrane assembly. The prepared adsorption membrane separation material solves the problems of complex esterification reaction dehydration and impurity removal process, low rectification separation efficiency, and the inability to recover byproducts and three wastes, innovates the traditional intermittent polyester production process with low reaction efficiency and long operation period, and has a wide application prospect in the polyester polyol synthesis field.

The invention belongs to the technical field of polyurethane microfiber leather, and particularly relates to bio-based waterborne polyurethane microfiber leather and a preparation method thereof. According to the microfiber leather, the microfiber non-woven fabric is adopted as a base material and is filled with the waterborne polyurethane resin synthesized by the specific bio-based polyol, so that the sustainability and the environmental protection property of a product are remarkably improved. According to the present invention, the polyurethane microfiber leather is formed through the wet impregnation solidification process, such that the obtained product does not contain the organic solvent, and has advantages of excellent mechanical property, excellent hydrolysis resistance, excellent moisture permeation and excellent gas permeation, the comprehensive performance can achieve the level of the traditional solvent type polyurethane microfiber leather, and the polyurethane microfiber leather can be widely used in the fields of high-end shoe materials, furniture, automobile interiors and the like.

The invention relates to polymer polyol as well as a synthesis method and application thereof. The polymer polyol is prepared from the following raw materials: polyether polyol, an olefinic unsaturated monomer, an initiator and a dispersing agent, the olefinic unsaturated monomers comprise styrene, acrylonitrile and alpha-methyl styrene. The purpose of controlling the molecular weight of the polymer is achieved by changing the types of the allyl monomers in the synthesis of the polymer polyol, so that the polymer polyol meeting the use requirements can be obtained under the condition that a chain transfer agent does not need to be used, and the product can be used for preparing polyurethane foam with good application performance.

The invention belongs to the technical field of high polymer material synthesis, and particularly relates to rosin-based polyether polyol as well as a preparation method and application thereof. Comprising the following steps: (1) rosin pretreatment: carrying out hydrogenation reaction on rosin and hydrogen under the action of a catalyst a to obtain stabilized rosin; (2) preparing an active intermediate: adding maleic anhydride into the stabilized rosin, and carrying out addition reaction to obtain a rosinyl carboxyl-containing intermediate; (3) synthesis of rosin-based polyhydric alcohol: adding polyhydric alcohol into the rosin-based carboxyl-containing intermediate, and carrying out esterification reaction to obtain hydroxyl-containing rosin-based polyhydric alcohol; and (4) ring-opening polymerization: taking the rosin-based polyol as an initiator, and polymerizing the rosin-based polyol with alkylene oxide under the action of a catalyst b to obtain the rosin-based polyether polyol. According to the invention, the natural rosin is taken as a raw material, the polyether polyol with stable performance and strong adaptability is prepared through modification and polymerization reaction, and the problems of wide molecular weight distribution and poor reaction adaptability of the natural modified polyol in the prior art are solved.

The utility model discloses a polyether polyol synthesis device. The device comprises a reaction kettle and a tubular mixing reactor designed based on the Venturi principle. The reaction kettle is provided with a stirring mechanism and a feeding pipeline. The mixing reactor is connected with the bottom of the reaction kettle through a circulating pump to form an external circulation loop and is connected with the upper part of the reaction kettle through a gas-phase pipe. A discharge hole of the feeding pipe in the mixing reactor is lower than an air inlet in the side surface of the mixing reactor. During working, circulating liquid materials form negative pressure in the mixing reactor, gaseous epoxy compounds in the reaction kettle are sucked in, and forced mixing reaction is realized. The utility model effectively solves the problems of poor gas-liquid contact, difficult initiation and high pressure in the traditional polyether synthesis, and has the advantages of shortening the reaction time, reducing the operation pressure and improving the production safety and efficiency.

The invention belongs to the field of polymer synthesis, and particularly relates to preparation of polymeric polyol with ester bond functional groups. The method comprises the following steps: under the action of a catalyst, carrying out ring opening polymerization to prepare the bio-based polyester polyol. Compared with the existing synthetic route of polyester polyol, the synthetic route provided by the invention has the advantages of preset molecular weight, narrow molecular weight distribution, clear end group structure and the like.

The application discloses a kind of preparation of mixed polyether polyol refining system and preparation method, including substrate, the surface of substrate is provided with feeding mechanism, for the feeding and processing of reactant raw material, the surface of substrate is provided with polymerization mechanism, for ring-opening polymerization of polymer, the surface of substrate is provided with processing mechanism, processing mechanism includes neutralization tank, neutralization tank is installed on the surface of substrate, the present application relates to chemical equipment technical field.The preparation of mixed polyether polyol refining system and preparation method, by first placing material in feeding tank, feeding tank contains standard scale feeder, material is first placed in feeder, then together into mixing, one end of conveying pipe extends backward, into subsequent process, in addition to requiring polymerization monomer to have higher purity, polymerization monomer must also have high purity, ensure the reaction speed of polyether polyol synthesis, ensure its molecular weight control and product color unsaturation.

The invention relates to the technical field of carbon dioxide-based polyols, in particular to a carbon dioxide-based polyols for polyurethane and a preparation method thereof, and the preparation raw materials at least comprise a bimetallic catalyst, ethylene oxide, carbon dioxide and a solvent; the addition amount of the bimetallic catalyst is 0.01-1% of the mass of ethylene oxide, the bimetallic catalyst is selected from at least one of a zinc-cobalt bimetallic catalyst, a zinc-iron bimetallic catalyst or a zinc-nickel bimetallic catalyst, ethylene oxide (EO) is used as a raw material, and the addition amount of the bimetallic catalyst is 0.01-1% of the mass of ethylene oxide. The carbon dioxide-based polyol with high added value is synthesized by optimizing the matching of other raw materials in the system and the control of process conditions, and is decomposed into polyol with proper molecular weight, so that the polyurethane with excellent mechanical property, low odor and environmental protection is synthesized, and the application field of the polyurethane is widened.

The invention discloses flame-retardant polyol as well as a preparation method and application thereof, and belongs to the technical field of preparation of high polymer materials. The preparation method of the flame-retardant polyol comprises the following steps: adding a solvent and 3-aminopropyltrimethoxysilane into epoxidized soybean oil, heating, and reacting to obtain modified epoxidized soybean oil; and then adding 9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide, carrying out a heating reaction, and after the reaction is finished, carrying out cooling to obtain the product. The high-hydroxyl-value flame retardant containing Si, N and P elements and prepared from two products mixed according to a specific proportion is synthesized by adopting a molecular design principle, a multi-layer continuous efficient protection barrier in which gas-phase flame retardance and condensed-phase flame retardance are mutually promoted can be constructed, reactive flame-retardant polyurethane synthesized from the flame-retardant polyol has an excellent flame-retardant effect, and the flame-retardant polyol has a good flame-retardant effect. The use of halogen is avoided, and the defect that the performance of an additive flame retardant is reduced due to migration of the flame retardant is overcome.

This invention provides a colorless, water-permeable carbon dioxide-based polycarbonate polyol and its preparation method, relating to the fields of polyol synthesis and carbon dioxide resource utilization. Addressing the various light scattering centers formed by residual metal catalysts, cyclic carbonate byproducts, terminal hydroxyl aggregates, and chain entanglement agglomerates in existing carbon dioxide-based polycarbonate polyols, this invention employs a combined decatalyst removal and purification process: "mild acid hydrolysis and complexation – precise neutralization and chain stabilization – graded gradient adsorption – temperature-controlled vacuum dehydration – precision filtration for impurity removal." This process thoroughly removes various light scattering centers from the system without damaging the polycarbonate polyol's main chain structure. The prepared product is colorless and water-permeable, with a transmittance ≥98% in the entire visible light spectrum (300-800 nm) and a total metal ion residue ≤10 ppm. This provides a high-quality core raw material for the preparation of highly transparent waterborne polyurethane, suitable for large-scale industrial production.