173results about How to "High epoxy value" patented technology

The invention discloses a method for preparing epoxidized fatty acid methyl ester with microreactor one-step method, comprising the following steps: injecting oil and fat, low-carbon alcohol and basic catalyst in a first microstructure reactor of a microchannel modularized reaction device, wherein the mole ratio of oil and fat to low-carbon alcohol is 1:11-17, and remaining for 3-10 min at the temperature of 65-85 DEG C; mixing outlet material of the first microstructure reactor with hydrogen peroxide, organic acid, acidic catalyst and stabilizing agent in a second microstructure reactor of the microchannel modularized reaction device, wherein the mole ratio of number of double bonds in organic acid to number of double bonds in oil and fat is 11-17:1, and remaining 1-5 min at the temperature of 65-95 DEG C; guiding the outlet material of the first microstructure reactor in a separator, standing for demixing to remove aqueous solution at lower layer; washing an organic phase at the upper layer with water till the pH is 6.5-7.5; and drying to obtain epoxidized fatty acid methyl ester.

The invention relates to a method for preparing bisphenol-A liquid epoxy resin, and belongs to the field of high polymer preparation. The method comprises the following steps: 1) adding a quaternary ammonium salt phase-transfer catalyst, and performing etherification at a temperature of between 70 and 85 DEG C for 45 to 240 minutes; 2) at a constant temperature of between 60 and 70DEG C, droppingalkali by NaOH aqueous solution for 1.5 to 4 hours, keeping epoxy chloropropane refluxing in the alkali dropping period, and discharging water out of a reaction system; and 3) separating unreacted epoxy chloropropane by a rotary evaporator at a temperature of 135DEG C, dissolving a mixture of resin and salt, removing solid salt by a filter, washing the resin for 3 to 5 times by water, separating solvent, and obtaining the final product. The prepared epoxy resin has the epoxy value between 0.55 and 0.56 through titration by hydrochloric acid acetone solution, low viscosity (between 7,000 and 10,000mPas), and the epoxy index between 0.595 and 0.622 through infrared spectroscopic analysis, and comprises 91 to 92 percent of micro molecular epoxy resin.

The present invention relates to modified rosin and is propylenyl pimaric acid diglycidic ester and acrylic acid modified rosin epoxy resin containing propylenyl pimaric acid diglycidic ester in 40-100 wt%. The present invention also provides their preparation process. The propylenyl pimaric acid diglycidic ester and acrylic acid modified rosin epoxy resin are prepared with cheap natural material and are new environment friendly adhesive material with high epoxide number. The may be used also as the intermediate for preparing rosin surfactant, and has simple preparation process easy to use in industry.

The invention discloses an epoxy resin based on gallic acids with a structure shown as the formula I, which has high epoxy values and also has higher crosslinking density after being cured, thus having good mechanical property and thermal property. The invention also discloses a preparation method of the epoxy resin based on the gallic acids, comprising the following steps: mixing the gallic acids, epoxy halogenopropane and a catalyst and reacting for 2-5 hours at the temperature of 100-120 DEG C; cooling to 20-40 DEG C; adding alkaline compounds and water and continuing to react for 2-5 hours; and washing, removing a solvent and drying to obtain the epoxy resin based on the gallic acids. The preparation method is simple in process, good in controllability and easy to implement industrially. The invention also provides an application of the epoxy resin based on the gallic acids. The epoxy resin based on the gallic acids is particularly applied to preparing composite materials, epoxy adhesives and coatings.

The invention relates to a method for preparing epoxidized fatty acid methyl esters by using a microchannel reactor. The method comprises the following specific steps of: preparing catalyst formic acid and concentrated hydrochloric acid in a certain proportion; pumping fatty acid methyl ester, a formic acid catalyst, and hydrogen peroxide into the microchannel reactor by using three metering pumps; and washing reaction products, separating and drying to obtain the final product epoxidized fatty acid methyl esters. The whole process is an exothermic reaction process, and peroxyformic acid and epoxidized fatty acid methyl esters are synthesized simultaneously. When the epoxidized fatty acid methyl esters are produced by the method, the temperature of the reaction process can be controlled effectively, high safety can be guaranteed, a module is good in mixing effect, and a product obtained through reaction is high in quality; and the continuous flow reaction is performed, the process is continuous, and high production efficiency is achieved.

The invention discloses an epoxy cardanol-based glycidyl ether plasticizer as well as a preparation method and application thereof. The preparation method comprises the following steps: taking cardanol and epoxy chloropropane as main raw materials and carrying out ring-opening addition reaction and ring-closure reaction to synthesize an intermediate product cardanol-based glycidyl ether; and further uniformly mixing the intermediate product with organic acid and a catalyst, heating to a certain temperature, dripping a peroxide source to carry out epoxidation reaction to obtain a crude product, leaving the crude product to stand, layering, performing neutralization and dehydration on the crude product after the reaction so as to obtain an epoxy cardanol-based glycidyl ether plasticizer. The plasticizer is non-toxic, has relatively high plasticizing efficiency and can endowing resin products with favorable thermal stability and mechanical property; and moreover, by taking the cardanol which is low in cost and easy to get as raw material, the epoxy cardanol-based glycidyl ether plasticizer integrates the advantages of being environment-friendly and being reproducible, complies with the developing trend of the plastic additive industry and has wide application and favorable application prospect.

The invention discloses a synthesis method of four-functional group epoxy resin. The method comprises the following steps: 1. dissolving tetraphenolichydroxyl phenolic resin with epichlorohydrin, performing an etherification reaction under the existence of a catalyst; 2. adding excessive alkali to complete a ring-closure reaction; 3. blasting acidic gas or adding inorganic acid or adding water-soluble organic acid to neutralize and remove residual alkali, rinsing to remove salt, recycling epichlorohydrin to obtain four-functional group epoxy resin coarse product; and 4. refining the coarse product to obtain four-functional group epoxy resin. The invention also provides the epoxy resin prepared by the synthesis method. Compared with the synthesis method of four-functional group epoxy resin in the prior art, the epoxy value of the four-functional group epoxy resin of the invention is higher, the organochlorine content is low and the demand of the copper-clad plate on epoxy resin can be satisfied; and by using the synthesis method of the invention, the wastewater generated in the synthesis process is greatly reduced.

The invention discloses a preparation method of microbial oil-based epoxide. The preparation method comprises the following steps: adding organic acid and an acidic catalyst into microbial oil, stirring, keeping the reaction temperature at 40-80 DEG C, slowly and dropwise adding peroxide, after the peroxide is added, reacting for 4-8 hours at a constant temperature, washing a crude product by using hot water with the temperature of 50-60 DEG C, performing alkali washing by using a dilute alkali solution with the concentration of 0.1-0.3mol/L, washing by using water until the solution is neutral, and dehydrating the washed product by distilling under reduced pressure to obtain a target product. The microbial oil-based epoxide can replace epoxy soybean oil, can be used as a plasticizer for plastic food and medicine packaging materials, can also be used as a biological and chemical raw material for preparing polyols, lubricants and binders and the like, and has a relatively high industrial value.

The invention relates to rubber seed oil-based epoxy fatty acid methyl ester and a preparation method and application thereof. After being degummed, rubber seed oil and methanol are subjected to pre-esterification and ester exchange reaction so that rubber seed oil-based fatty acid methyl ester rough product is obtained, the rubber seed oil-based fatty acid methyl ester rough product is subjected to crystallization and separation at low temperature so that UFAMEs (unsaturated fatty acid methyl esters) rich in polyene is obtained, products from epoxidation can be allowed to stand and delaminate, and finally the rubber seed oil-based epoxy fatty acid methyl ester is obtained after the upper oil phase is neutralized, dehydrated and adsorbed. The epoxide value is equal to or larger than 5.0%, the flash point is equal to or larger than 200 DEG C, the resistivity is equal to or larger than 1.0X109 ohmm, the tincture is smaller than or equal to 180, the acid value ranges from 0.45-0.5mgg-1, and the heating loss is smaller than or equal to 0.5. The raw materials of the rubber seed oil-based epoxy fatty acid methyl ester are easy to obtain so that the cost thereof is low. The rubber seed oil-based epoxy fatty acid methyl ester is high in performance and stable in quality and suitable for industrial production. The preparation method of the rubber seed oil-based epoxy fatty acid methyl ester is simple in process, convenient in operation, short in production cycle, low in energy consumption and low in pollution during production.

The invention discloses a catalyst which comprises an activated carbon body, wherein boron trifluoride is fixedly loaded on the outer surface of the activated carbon body. The solid-phase catalyst formed by fixedly loading boron trifluoride on the activated carbon is good in selectivity on the main reaction in the ring-opening reaction process that aliphatic glycidyl ether is prepared, and a final product is high in epoxy value, low in organic chloride content and good in quality; and in addition, the solid-phase catalyst is low in equipment corrosion, easy to be separated from a reaction product after the ring-opening reaction is accomplished, and can be recycled and reused after being separated.

The invention discloses a high epoxide number environment-friendly plasticizer production process. The production process comprises the following steps of: adding cottonseed oil, methanol and sodium methoxide into an ester exchange reactor for reaction to obtain mixed fatty acid methyl ester; adding into a rectifying tower for separation, and performing epoxidation, neutralization, washing and dehydration on methyl oleate obtained from the tower bottom to obtain a high epoxide number environment-friendly plasticizer; and performing sulfonation reaction on palmitic acid methyl ester obtained from the tower top and sulfur trioxide, and ageing, esterifying, neutralizing and drying to obtain an environment-friendly surfactant MES. By the production process, the raw materials are readily available, the process is advanced, equipment is simple, the high epoxide number plasticizer can be prepared, and the byproduct, namely the palmitic acid methyl ester can be used for producing the environment-friendly surfactant.

The invention discloses a preparation method of 4,4'-biphenol diglycidyl ether. In the preparation method provided by the invention, 4,4'-biphenol and epichlorohydrin are used as raw materials to be synthesized by a two-step method under the effect of a heterogeneous catalyst. The preparation method comprises the following steps: firstly, carrying out a ring-opening etherifying reaction, then carrying out a ring-closing reaction, and in the alkalizing process, separating out water generated in the reaction by a water-separating technique, so that the reaction shifts to the right at equilibrium, and various hydrolysis secondary reactions in the system can be controlled. The product obtained by the technique has high epoxide equivalent and high yield, the technique has simple reaction steps and is convenient for posttreatment, and experimental results show that the epoxide number is 0.65-0.67, and the melting range is 159.1-160.4 DEG C.

The invention relates to a production method of epoxidized fatty acid methyl ester/epoxidized soybean oil. The production method concretely comprises the following technological steps: (1) taking one of soybean oil and fatty acid methyl ester, formic acid and hydrogen peroxide and preheating them to 90+/-2 DEG C; and (2) adding preheated soybean oil, formic acid and hydrogen peroxide into a pipeline reactor to react until the end of the reaction. According to the invention, by the utilization of the pipeline reactor, the technical bias that a high concentration of hydrogen peroxide cannot be used in a traditional epoxidized soybean oil production technology is overcome; by the use of 70% high concentration of hydrogen peroxide in the production process, the reaction time is greatly shortened, and the yield is substantially raised. In addition, by the use of a high concentration of hydrogen peroxide and a high proportion of formic acid, the reaction speed is fast, side reaction is less, epoxy value of the produced epoxidized soybean oil/epoxidized fatty acid methyl ester is remarkably raised, color is obviously improved, and transparency is better.

The invention provides a chromium-free high-solid-content double-component epoxy primer and a preparation method thereof. The chromium-free high-solid-content double-component epoxy primer is composed of a component A and a component B in a weight ratio of 100:(30-40). The chromium-free high-solid-content double-component epoxy primer is mainly used for the surfaces of steel, iron, aluminum and other substrates, and aircrafts and equipment components with harsh requirements for environment friendliness and corrosion resistance in military and civil industries, and has the advantages of excellent salt spray resistance, excellent filiform corrosion resistance, excellent water resistance, excellent machine oil resistance and excellent adhesive force. The preparation method is simple, and is suitable for the demands of large-scale industrial production.

The invention discloses a synthetic method of butyl glycidyl ether. The method comprises the following steps of performing ring-opening reaction on butanol and epoxy chloropropane to prepare a butyl chlorhydrin ether intermediate and performing ring-closing reaction on the butyl chlorhydrin ether intermediate and sodium hydroxide to prepare butyl glycidyl ether. The catalyst used in the ring-opening reaction is an active carbon immobilized boron trifluoride catalyst, wherein the immobilized amount of boron trifluoride is 5-20%. Through using the active carbon immobilized boron trifluoride catalyst to catalyze the ring-opening reaction of butanol and epoxy chloropropane, the selectivity for main reaction of the ring-opening reaction is high, and side reactions are reduced, so that the epoxide number of the obtained butyl glycidyl ether is high, the content of organochlorine is low and the quality is good. In addition, the solid phase catalyst has low corrosion to devices, can be easily separated from reaction products after ring-opening reaction, and can be recycled after being separated, and therefore, the environmental pollution is avoided.

The process of preparing active epoxy resin diluent with low organochlorine content includes the following steps: mixing alcohol or phenol, benzene solvent and catalyst, dropping chloroepoxy propane into the mixture at 10-55 deg.c for 4-12 hr, and stilling at 20-60 deg.c for 2-4 hr; adding quaternary ammonium salt as the phase transfer catalyst, dropping water solution of sodium hydroxide of 30-50 wt% concentration at 20-55 deg.c for 2-4 hr, raising the temperature by 5-15 deg.c, and maintaining for 1-5 hr; and extracting, neutralizing or water washing to eliminate sodium chloride, and eliminating benzene solvent to obtain active epoxy resin diluent with low organochlorine content. During the ring-closing reaction, phase transfer catalyst, rather than alkali metal hydroxide, is added to result in even high organochlorine eliminating effect.

The synthesis process of epoxy resin with anionic catalyst includes the following steps: the etherification of diphenol propane and epoxy chloropropane in the presence of quaternary ammonium salt at 75-125 deg.c for 1-8 hr to produce etherate; the ring closing reaction of treated alkaline anionic exchange resin and the etherate at 35-65 deg.c for 1-6; filtering the resultant to obtain filtrate and vacuum distilling the filtrate to obtain the epoxy resin product. The synthesis process has no waste water and sodium chloride and is environment friendly, and the multiple times of catalysis with alkaline anionic exchange resin promote the ring closing reaction and results in raised epoxy resin yield.

The invention relates to a method for preparing epoxidized oil under the ultrasound condition, comprising the following steps: a. taking and placing a certain amount of plant oil into a reaction container, placing the reaction container into an ultrasound device, stirring while adding the mixed liquid of formic acid (glacial acetic acid or the mixture of formic acid and glacial acetic acid) and catalyst, adjusting temperature of the system, adding hydrogen peroxide drop by drop slowly as well as starting ultrasound, controlling frequency and power of the ultrasound, adjusting the temperature of the system after the adding of hydrogen peroxide is finished, carrying out ultrasound in a certain reaction frequency, certain reaction power and reaction time, lowering the temperature to room temperature after the reaction, removing the lower layer after stewing, and obtaining crude epoxidized plant oil; b. transferring the crude epoxidized plant oil obtained in step a to water washing equipment for washing, and removing the water layer after stewing; and c. transferring the liquid obtained in step b to a vacuum distillation unit (VDU) for vacuum distillation to remove moisture and obtaining the epoxidized plant oil product.

The invention discloses a preparation method of tetraglycidyl m-xylene diamine epoxy resin, which comprises the following steps: (1) adding epichlorohydrin and deionized water into a reaction device, dropwisely adding m-xylene diamine for a ring-opening reaction; (2) adding an aqueous alkali into the material obtained in step (1) for a ring-closure reaction, wherein the molar ratio of the alkali in the aqueous alkali to the m-xylene diamine is 4:1; (3) after the reaction, recovering epichlorohydrin, adding an inert solvent and deionized water, performing extraction layering, removing the water layer; (4) refining the organic layer with the aqueous alkali, wherein the molar ratio of the alkali in the aqueous alkali to the m-xylene diamine is 1:1-2.5:1; (5) washing the refined material with water, removing the solvent to obtain the tetraglycidyl m-xylene diamine epoxy resin. The method of the invention is simple in process, easy to implement, and low in cost, and the prepared tetraglycidyl m-xylene diamine epoxy resin has low viscosity, low organic chloride content, and a high epoxy value.