35 results about "Ethylene glycol monovinyl ether" patented technology

The invention provides a polycarboxylate water reducer and a preparation method thereof, and belongs to the field of preparation of concrete admixtures. The polycarboxylate water reducer is prepared by preparing an unsaturated polyether macromonomer by taking ethylene glycol monovinyl ether as an initiator first and then polymerizing the unsaturated polyether macromonomer (EPEG) with a small monomer acrylic acid. The polycarboxylate water reducer prepared by the preparation method provided by the invention has more hydrophilic groups in a molecular structure, high water reducing rate, obviously enhanced fluidity retention and obviously enhanced mud resistance, so that a relatively high construction requirement can be met.

The invention belongs to the technical field of chemical engineering, and discloses a preparation method of ethylene glycol monovinyl ether, which comprises the following steps: 1) dissolving a basiccatalyst in ethylene glycol to form a reaction material, 2) adding the reaction material into a reactor, removing air in the reactor, continuously introducing acetylene for reaction, and continuouslysupplementing ethylene glycol in the reaction process to keep the liquid level of the reaction liquid in the reactor unchanged, 3) continuously taking the reaction product out of the reactor by acetylene, and distilling and condensing to form a collected liquid, and 4) rectifying the collected liquid to obtain ethylene glycol monovinyl ether. The preparation method provided by the invention has the advantages of high safety, few byproducts, simple raw materials and stable reaction, and can realize continuous production of ethylene glycol monovinyl ether.

The invention discloses a process of synthesizing comprehensive water reducer by using a hexa-carbon monomer. The process comprises the following specific steps: preparing 4560 kg of bottom water in areaction kettle, pumping 3060 kg of the hexa-carbon monomer, and uniformly stirring the mixture; in summer production, starting heat exchanger cooling water to cool a bed charge, and controlling thetemperature of the bed charge at 8-12 DEG C; in winter production, introducing steam, and controlling the temperature of the bed charge at 24-26 DEG C, wherein the temperatures in the reaction processare controlled as follows: the temperature of the whole reaction system is controlled at 10-20 DEG C in summer and the temperature of the whole reaction system is controlled at 25-30 DEG C in winter.By carrying out low-temperature production with a diethylene glycol monovinyl ether, the obtained product is wide in adaptability, can be suitable for various gel materials, has water reducing and slump preventing functions, and can improve the construction performance of concrete. The compounding cost of the water reducer can be saved, the process is simple and convenient to operate, no wastes are available in the production process, and the process is environment-friendly and reliable, and industrial production on a large scale is facilitated.

The invention provides a macromer for preparing polycarboxylic acid water-reducer and a preparation method thereof. The macromer is synthesized by the reaction of 2-(vinyloxy)ethanol and epoxyethane as main materials. The macromer has simple molecular structure, the production process is safe and steady, and the cost is low; the reactivity is high and the conditions is easily controlled when the macromer is used for preparing polycarboxylic acid water-reducer, the obtained polycarboxylic acid water-reducer has high performance and performance and price ratio.

The invention relates to a preparation method of a calcium carbonate/polymer core-shell structure. According to the preparation method, diethylene glycol monovinyl ether is used as a crystal form controlling agent, a shape controlling agent and a polymeric monomer and interface reaction of enabling ultrasonic initiation reactants to collide between organic-phase and water-phase liquid drops is carried out to initiate the monomer to polymerize, so that stable vaterite-phase calcium carbonate/polymer nanoparticles with a (100) face are obtained and the particle size is about 200nm to 300nm.

The invention relates to a polycarboxylic acid water reducer, and concretely relates to a preparation method of a polycarboxylic acid water reducer macromonomer ethylene glycol monovinyl polyoxyethylene ether. The method comprises the following steps: reacting ethylene glycol monovinyl ether with lithium aluminum hydride to obtain a catalyst, carrying out a condensation reaction on the ethylene glycol monovinyl ether and ethylene oxide under the action of the catalyst to obtain an ethylene glycol monovinyl ether oligomer, carrying out a condensation reaction on the ethylene glycol monovinyl ether oligomer and ethylene oxide under the action of an alkaline catalyst, performing termination with epoxypropane, and adding glacial acetic acid to neutralize in order to obtain the ethylene glycolmonovinyl polyoxyethylene ether. The ethylene glycol monovinyl polyoxyethylene ether obtained in the invention has the advantages of narrow relative molecular weight distribution, high double-bond reservation rate, simple process, safety, low reaction temperature, short reaction time and low production cost.

The invention discloses a highly-adaptable polycarboxylic acid water reducer and a synthesis method thereof. The method comprises the following steps: sequentially adding polyethylene glycol, a polymerization inhibitor and acrylic acid into a reaction container, carrying out thorough stirring, adding a catalyst into a container, and carrying out a reaction under a heating condition to form a polyester functional monomer; and carrying out a polymerization reaction on ethylene glycol monovinyl ether, acrylic acid, a composite initiator and the obtained polyester functional monomer in water usedas a solvent at normal temperature under normal pressure to obtain the polycarboxylic acid water reducer. The water reducer has the advantages of simple structure, excellent performances, strong adaptability, and suitableness for industrial promotion.

The invention provides an alcohol head polymerization purification preparation method used for preparing C6 alcohol head diethylene glycol monovinyl ether. The preparation method comprises the following steps: performing sufficient polymerization reaction on diethylene glycol, a pre-prepared mixed solution and acetylene in a reaction kettle to obtain a reaction mixture, rectifying the reaction mixture through a primary rectifying tower and a secondary rectifying tower, and collecting a diether byproduct and C6 alcohol head diethylene glycol monovinyl ether by adjusting the reflux ratio. The purity of the obtained C6 alcohol head is 98% or above, and the C6 alcohol head is basically free of diether byproducts and reaches the delivery standard.

The invention discloses a preparation method and a production system of ethylene glycol monovinyl ether, and belongs to the technical field of organic synthesis. The preparation method comprises the following steps: taking acetylene and ethylene glycol as raw materials, intermittently introducing acetylene into ethylene glycol containing a catalyst, carrying out pressurized reaction in a high-pressure closed reaction kettle, and adding inert gas as shielding gas of acetylene; by intermittently carrying out gas stripping, condensation and recovery of the product in the reaction process, generation of side reactions can be effectively avoided, so that the product selectivity is improved. The preparation method disclosed by the invention is simple to operate, high in conversion rate, few in byproducts and relatively high in reaction selectivity and safety.

The invention discloses a 12-crown ether-4 lithium salt complex and a preparation method thereof, and a method for preparing 12-crown ether-4 by adopting the complex. The preparation method of the 12-crown ether-4 comprises the following steps: by taking a compound triethylene glycol monovinyl ether in a formula 1 as a raw material, adding an alkaline substance into a first reaction solvent for catalytic reaction with a compound lithium alkoxide containing a substituent group in a formula 2 under the condition of air isolation, and obtaining a compound 12-crown ether-4 lithium salt complex in a formula 3 after the reaction is completed; and then adding a compound 12-crown ether-4 lithium salt complex as shown in a formula 3 and an acidic material into a second reaction solvent, reacting at the reaction temperature of-20 to 100 DEG C, and after the reaction is completed, obtaining a compound 12-crown ether-4 as shown in a formula 4. The design route is reasonable in design, the raw materials are safe and easy to obtain, the process safety is high, the reaction selectivity is high, the product purity is high, the method is friendly to operators, the production cost is greatly reduced, and the requirements of industrial production of products can be fully met.

The invention relates to an alkaline anion exchange membrane for a fuel cell and a preparation method of the alkaline anion exchange membrane. The membrane is prepared by the following steps: 1) reacting p-methylphenol and diethylene glycol monovinyl ether with hexachlorocyclotriphosphazene HCCP according to a certain ratio; 2) copolymerizing the product obtained in the step 1) and styrene according to different feeding ratios; 3) performing methyl bromination on the polymer in the step 2) by NBS; and 4) carrying out quaternization reaction on the polymer obtained in the step 3) by using tertiary amine, and alkalifying in a dilute sodium hydroxide solution to obtain the alkaline anion exchange membrane. According to the method, the main chain is free of heteroatoms, cyclotriphosphazene is grafted with high-density conduction sites, the alkali resistance and the conductivity are improved to a certain extent, the thermal stability is high, the used raw materials are simple and easy to obtain, and the operation is convenient.

The invention discloses a novel environment-friendly plasticizer, which is prepared from 6 to 9 parts of 4-methoxyl-1,3-bis(4-chlorophenyl) phthalate, 20 to 32 parts of phthalic anhydride, 12 to 25 parts of 2-propyl-1-heptanol, 1 to 9 parts of filling materials, 13 to 19 parts of phytosterol, 19 to 30 parts of palmitic acid, 30 to 50 parts of gum rosin, 16 to 20 parts of organic solvents, 1 to 9 parts of zinc stearate, 8 to 13 parts of glass fiber powder, 5 to 9 parts of isopropanol, 10 to 16 parts of oxides and 9 to 14 parts of bonding agents; the organic solvents are prepared from perchloroethylene, ethylene glycol monovinyl ether and trolamine according to the mass ratio of (1 to 9):(6 to 10):(3 to 15); the oxides are prepared from copper oxide, iron trioxide, aluminum oxide and silveroxide according to the mass ratio of (6 to 15):(3.6 to 6.8): (1 to 3):(5.9 to 6.9). The novel environment-friendly plasticizer has the advantages of high stretching intensity and good bonding performance; certain fragrance can be released in the recipe; the sterilization and worm expelling functions are achieved; the enhancement effect is stable; the toxicity is reduced.

The invention discloses a polymerizable acid sensitive amphiphilic compound, which is prepared from a substance C, a dihydric alcohol and di(ethylene glycol) vinyl ether as raw materials, p-toluenesulfonic acid as a catalyst and dichloromethane as a solvent by reaction in two steps, wherein the substance C is any one of acryloyl chloride, methacryloyl chloride and 2-ethylacryloyl chloride; the dihydric alcohol is any one of ethylene glycol, 1,3-propanediol, 1,4-butanediol, 1,5-pentanediol, 1,6-hexanediol, 1,7-heptadiol, 1,8-octanediol, 1,9-nonanediol and 1,10-decanediol; the acid-sensitive amphiphilic compound has one end of an oleophilic group and the other end of a hydrophilic group, are amphiphilic, have good solubility in both aqueous and oily solutions, and can self-assemble into nanomicelles in water; the acid-sensitive amphiphilic compound can degrade under acidic conditions, can be used as a drug carrier, and is particularly suitable for being used as a target carrier of someanticancer drugs; one end is double bond, and the polymerizable acid sensitive amphiphilic compound is easy to polymerize to generate new substances for use as medical materials.

The invention discloses a method for synthesizing a polycarboxylate superplasticizer through binary copolymerization of 6C polyether macromonomer under heterogeneous catalysis by cobalt oxide. The method is characterized by comprising the following steps: weighing raw materials including a macromonomer, a small monomer, a chain transfer agent, a reducing agent, an oxidizing agent, a catalyst and water, mixing the small monomers and the water to prepare a solution A, and mixing the reducing agent, the chain transfer agent and the water to prepare a solution B, adding the solution C into the solution B, wherein the macromonomer is diethylene glycol monovinyl ether; and adding the macromonomer and the water into a reactor with a thermometer, controlling a temperature to be 0-20 DEG C, adding the catalyst and the water, conducting stirring and mixing, adding the oxidizing agent and the water, performing mixing and stirring, dropwise adding the solution A and the solution B at a constant speed at the same time, and carrying out a heat-preserved reaction, wherein the total time of dropwise addition and reaction is 1-2 hours. The polycarboxylate superplasticizer prepared through binary copolymerization of 6C polyether macromonomer under heterogeneous catalysis by cobalt oxide is especially suitable for concrete preparation, and has the advantages of excellent cement dispersion performance and aging slump retaining performance, good compressive strength and durability, and strong practicability.

The invention discloses finish paint for wood. The finish paint for wood is prepared from components in parts by weight as follows: 10-20 parts of phthalic anhydride, 10-20 parts of fatty acid, 1-5 parts of nano-silica, 5-7 parts of ethanol, 2-10 parts of ferric oxide, 5-15 parts of triethyl citrate, 0.2-0.9 parts of a dispersing agent, 0.2-0.9 parts of citric acid, 1-2 parts of a thickening agent, 0.2-0.5 parts of a defoaming agent, 1-5 parts of styrene, 1-5 parts of perchloroethylene, 1-5 parts of trichloroethylene and 1-5 parts of ethylene glycol monovinyl ether. The finish paint for wood has beneficial effects as follows: 1, wear resistance is good; 2, adhesive force is strong, and the finish paint is not prone to falling off under collision and vibration during using; 3, the finish paint is environmentally friendly.

The invention discloses a reinforcing method for a glass product. The reinforcing method includes the following steps that the glass product is placed into a preheating chamber in the constant temperature state and preheated; vinyl triethoxy silane and ethylene glycol monovinyl ether are selected, the vinyl triethoxy silane is put into the ethylene glycol monovinyl ether and dissolved, and a vinyltriethoxy silane solution, namely, a soaking solution is obtained; mixed liquid jointly composed of a potassium chloride solution, titanium tetrachloride and an alcohol solvent and potassium glutamate are mixed and stirred, and an electrolyte is finally formed; the preheated glass product is immersed into the soaking solution for soaking; the soaked glass product is taken out, put into the electrolyte for electrolysis, taken out of the electrolyte after electrolysis, washed with fresh water, and naturally aired. By means of the reinforcing method, the glass product is not prone to breakage bycollision with external objects in the use process, and the steps and the flow of the whole reinforcing method are easy and facilitate execution and operation.

The invention relates to preparation methods for a hydrophilic UV photocuring monomer and an aqueous emulsion thereof. The hydrophilic UV photocuring monomer is prepared from bisphenol A polyoxyethylene ether, epoxy chloropropane, ethylene glycol monovinyl ether, potassium hydroxide, sodium hydroxide, a polymerization inhibitor and a catalyst. The structural formula of the hydrophilic UV photocuring monomer is shown in the specification. In the structural formula, n is in a range of 2-4. Thus, on the basis of keeping the original strength of bisphenol A type photocuring resin, an ethyoxyl group is introduced, so toughness is enhanced, and the resin is not easy to break and fall off; and hydrophilic ether bonds and hydroxyl groups are introduced, so the hydrophilicity of the photocuring monomer is enhanced, a low-VOC aqueous emulsion is easy to prepare, and the prepared aqueous emulsion is good in stability.