815 results about "Propenyl" patented technology

A process for producing 2-acrylamide-2-methyl propane sulfonic acid (ATBS) which comprises reacting acrylonitrile, fuming sulfuric acid, and isobutylene. During the reaction, the concentration of 2-methyl-2-propenyl-1-sulfonic acid (IBSA) and/or that of 2-methylidene-1,3-propylenedisulfonic acid (IBDSA) in the reaction system are determined. When the IBSA concentration exceeds 12,000 mass ppm and/or the IBDSA concentration exceeds 6,000 mass ppm, then the concentration of sulfur trioxide in the reaction system is reduced. Thus, ATBS having an IBSA content of 100 mass ppm or lower and an IBDSA content of 100 mass ppm or lower is produced.

The invention discloses a method for preparing a dissaving vinyl or propenyl amide polymer, which can be used for preparing the dissaving vinyl or propenyl amide polymer with high conversion in a polar solvent system through reversible addition-fragmentation transfer polymerization by adopting a semi-continuous operating technique and using a diene monomer and a chain transfer agent with low proportion for RAFT polymerization. The polymerization process can be controlled easily and the molecular weight and distribution of the final product can be regulated and controlled.

The invention provides a slump loss resistant type gather carboxylate water-reducing agent, which is a polymer of prenyl polyoxyethylene ether or prenyl polyoxyethylene propenyl ether or methyl allyl polyoxyethylene ether or methallyl polyoxyethylene propenyl ether (a macro-monomer A) and unsaturated carboxylic acid (a micro-monomer B) and an unsaturated carboxylic acid derivative (a micro-monomer C), belonging to the field of concrete admixtures. A synthetic method is as follows: the water-reducing agent is prepared by initiating the macro-monomer A, the micro-monomer B and the micro-monomer C through an oxidative-reductive initiating system by taking water as a solvent at lower temperature, and carrying out copolymerization under the action of a chain transfer agent. The water-reducing agent overcomes the disadvantages of being poor in slump loss resistance, long in setting time and the like of the water-reducing agent synthesized by allyl polyoxyethylene ether and has the advantages of being high in slump loss resistance, good for being suitable to different cements and low in influence on concrete setting time.

The invention provides a preparation method for a molecular imprinting material and the molecular imprinting material prepared through the preparation method. The preparation method comprises the steps that silicon oxide is coated on the surfaces of magnetic ferroferric oxide nanometer particles, the magnetic ferroferric oxide nanometer particles are modified with gamma-(methacryloyl chloride) amino propyl trimethoxy silane to obtain magnetic ferroferric oxide nanometer particles with propenyl on the surfaces, the magnetic ferroferric oxide nanometer particles with the propenyl on the surfaces serve as carriers, estrogen receptors are simulated, functional monomers are optimized, a surface imprinting technology is adopted, and then the molecular imprinting material which can simultaneously identify seven kinds of environmental endocrine disrupting chemicals is prepared. According to the preparation method, the easy separation of a magnetic nanometer material, the good water solubility of a silicon oxide nanometer material, the specific recognition ability of molecular imprinting polymers and the surface imprinting technology are mutually combined, the preparation technology is simple, the conditions are mild, the prepared molecular imprinting material is large in adsorption capacity, fast to respond, high in magnetism, good in chemical stability and high in repeating utilization rate, and the problems that at present, multiple trace, steroid and phenol environmental endocrine disrupting chemicals are difficult to simultaneously identify, separate and enrich are solved.

The present invention discloses silicon-containing (methyl) acrylate monomer and its copolymer and their preparation process. The silicon-containing (methyl) acrylate monomer as silane or silane oligomer with methyl propenyl acyloxy radical or propenyl acyloxy radical is prepared through the catalytic reaction of silane coupler with (methyl) propenyl acyloxy radical, and hexamethyl disilane or hexamethyl disilane and active organosilicon under the action of catalyst. The present invention also discloses one kind of silicon-containing (methyl) acrylate copolymer and its solution copolymerization, water emulsion copolymerization and ultraviolet curing process. The copolymer has excellent adhering performance, waterproof and antifouling performance and weather resistance.

The invention relates to a salt-tolerant resistance-reducing agent applied for a shale gas reservoir. The resistance-reducing agent is a biopolymer comprising an acrylamide unit and a propenyl quaternary ammonium salt unit. The weight percent of the acrylamide in the biopolymer is 10%-80%. The propenyl quaternary ammonium salt is one of a propenyl trialkyl ammonium chloride, an alkyl acrylamido propyl trialkyl ammonium chloride or a dialkyl diallyl ammonium chloride. The weight percent of the propenyl quaternary ammonium salt in the biopolymer is 20%-90%, and the molecular weight of the propenyl quaternary ammonium salt is 1*10<6> to 2*10<6>. The resistance-reducing agent provided by the invention can be used as resistance-reducing agents for fracturing flow-back fluid, cavern water and underground produced water, wherein the fracturing flow-back fluid, the cavern water and the underground produced water contain divalent metal ions, and the weight percent resistance-reducing agent provided by the invention for using is 0.05%-0.1%. The resistance-reducing agent provided by the invention has good salt tolerance and resistance-reducing properties, and overcomes problems, of other polypropanamide resistance-reducing agents at present, comprising salt tolerance deficiency in using processes and incapability of being applied for hypersalinity water that comprises Ca<2+> and Mg<2+> at the same time.

The invention relates to photo-crosslinking sericin protein hydrogel and a preparation method and application thereof. The preparation method comprises the steps that methyl propenyl modified sericin protein is prepared into a solution to be mixed with a photoinitiator (Irgacure 2959) solution, and the sericin protein hydrogel is obtained through ultraviolet irradiation. The obtained sericin protein hydrogel has the good biodegradability, autofluorescence characteristic and injectable property, and wounds caused by implanting or taking out biomaterials can be effectively reduced. Most importantly, the sericin protein hydrogel has good biocompatibility both in vivo and in vitro, and adhesion of carried cells can be effectively promoted. Serving as 2D and 3D cytoskeleton, the sericin protein hydrogel can effectively promote proliferation of the carried cells and promote the carried cells to form functional tissue under the condition of being free of serum support; serving as wound accessories, the sericin protein hydrogel can repair skin wounds and can serve as tissue engineering and regenerative medicine biological materials.

The use of certain synthetic phospholipids to preserve pharmaceutical compositions from microbial contamination is described. The synthetic phospholipids have unique molecular arrangements wherein a phosphate group is linked to a quaternary ammonium functionality via a substituted-propenyl group, and the quaternary ammonium functionality is further linked to at least one long hydrocarbon chain. Such molecular arrangements are what make the phospholipids of formula (I) highly water soluble, e.g., the length of the hydrocarbon chain assists to maintain solubility and efficacy of the molecules for the uses described herein. The synthetic phospholipids described herein have been found to be particularly useful as antimicrobial preservatives for ophthalmic, otic and nasal pharmaceutical compositions, especially ophthalmic compositions. These compounds may also be utilized to disinfect contact lenses. The invention is based in-part upon a finding that the antimicrobial activity of the synthetic phospholipids is affected by the ionic strength of the compositions in which the compounds are contained. The provision of compounds having limited ionic strengths is therefore preferred.

The invention relates to a corrosion inhibitor used in carbon steel corrosion in an ammonia-method desulphurization ammonium sulfate preparation system. The corrosion inhibitor is composed of, by weight, 20-80% of a thiourea derivative, 10-50% of organic amine, and 5-40% of imidazoline quaternary ammonium salt. The thiourea derivative is one selected from phenyl thiourea, diphenyl thiourea, thiosemicarbazide and propenyl thiourea. The organic amine is one selected from polyacrylamide, dodecylamine, hexadecylamine and octadecylamine. The chemical structural formula of the imidazoline quaternary ammonium salt is represented as the following, wherein R is phenyl, C2-C11 straight-chain alkyl, CH3(CH2)7CH=CH(CH2)7 or CH3(CH2)9CH=CH(CH2)7, and n is 2, 3, or 4. The corrosion inhibitor has good corrosion inhibiting performance. When the corrosion inhibitor is applied in inhibiting the corrosion in the ammonia-method desulphurization ammonium sulfate preparation system, the dose is low, and application is simple and convenient.

The invention provides a preparation method of a molecularly imprinted material and a molecularly imprinted material prepared by the same. The preparation method comprises the following steps: depositing Fe3O4 on a graphite-like-phase carbon nitride surface by a coprecipitation process to obtain a Fe3O4-g-C3N4 nano material, thereby obtaining a propenyl-surface-modified magnetic silicon dioxide graphite-like-phase carbon nitride nano material; and by using the propenyl-surface-modified magnetic silicon dioxide graphite-like-phase carbon nitride nano material as a carrier, optimizing a functional monomer, and carrying out a surface imprinting technique to obtain the molecularly imprinted material capable of quickly indentifying seven environmental endocrine disrupting chemicals at the same time. The molecularly imprinted material has the advantages of high adsorption capacity, favorable selectivity, high response speed, high chemical stability and high utilization ratio, is convenient for operation, can simultaneously implement identification and separate enrichment of multiple trace steroid/phenol environmental endocrine disrupting chemicals, and widens the application range of the existing magnetic nano material, graphite-like-phase carbon nitride material and molecularly imprinted material.

The invention relates to a method of silence enhancing magnesium alloy cathode electrophoresis corrosion resistant coating layer. It takes silence enhancing process to the surface of magnesium alloy after cleaning. The silence solution adopts aqueous solution of 2-3 ethoxy, silicone base propyl tetrasulfide, propenyl-3-ethoxy silicane, gama- glycidol ether oxygen propyl-3-methoxyl silence or 2, 3 ethoxy silicone base ethane, and pH value is acidity. The method need not special device to heat, and combining with cathode electrophoresis, the binding power of cathode electrophoresis lacquer and magnesium alloy basal body would be enhanced.

The invention relates to an amino-containing crosslinkable polyether sulfone and a preparation method thereof and applications of a gas separation membrane, belonging to the field of a polymer nanocomposite material. Aiming at solving the problems of compatibility of gas permeability and separating property of the existing gas separation membrane, a membrane formed mixing and casting crosslinkable polyether sulfone with molecular side chain containing phenylamino and allyl, together with pyrrolidone, or a thermal-crosslinked membrane is formed by adding benzoyl peroxide in mixing with N-methyl pyrrolidone and casting can be utilized, in addition, a mixed matrix membrane or mixed matrix thermal-crosslinked membrane can formed by adding a multiwalled carbon nanotube. The amino containing can have hydrogen bond interaction with carboxyl of the carbon nanotube, the carbon nanotube can be more evenly dispersed in polymer, and the two interfaces have good binding power, so that the gas permeability and selectivity of the mixed matrix membrane can be enhanced. The amino-containing crosslinkable polyether sulfone is used for preparing the gas separation membrane and gas separation.

This invention relates to resin glasses, which comprise: diethylene glycol propenyl dicarbonate (Brite-55) 50-95 wt.%, diethylene glycol propenyl carbonate (RAV 7AT) 0-48 wt.%, 2-(2'-hydroxyl-5-tert-octyl)-benzotriazol (UV-5411) 0.1-0.2 wt.%, inorganic paint B 0.3-0.4 wt.%, inorganic paint A 0.1-0.2 wt.%, diisopropyl peroxydicarbonate (IPP) 1-3.5 wt.%, distyryl dibenzotriazol (UV-0) 0.01-0.5 wt.%. The resin glasses are produced by: preparing the raw materials, filling, curing, treating the substrate glass, returning to the furnace, and treating the glasses. The obtained resin glasses can block total UV (below 400 nm) and blue-violet light (between 400-420 nm), thus can protect eyes from UV and blue-violet damage, and can satisfy the requirements of people in welding locus, banks, UV sterilization rooms, highland, torrid zones, and subtorrid zones.