14 results about "Phenylpropene" patented technology

The invention relates to the technical field of PC resin flexibilizers, and discloses a shell-core structure styrene-acrylic resin modified organic silicon elastomer flexibilizer as well as a preparation method and application thereof in order to solve the problems that an organic silicon material and PC resin are poor in intersolubility, a traditional flexibilizer is poor in low-temperature toughening performance and the like. Comprising the following steps: uniformly mixing hydrogen-containing silicone oil, vinyl silicone oil, a third alkenyl functional component and a catalyst, and pre-emulsifying under the action of a surfactant and a thickener to obtain an organic silicon pre-emulsion SiE; uniformly mixing an alkenyl phenyl compound, acrylate and / or a cross-linking agent, adding a molecular weight regulator and an oil-soluble initiator, and pre-emulsifying under the action of a surfactant and water to obtain a styrene-acrylic pre-emulsion SAE; the preparation method comprises the following steps: firstly, preparing an organic silicon pre-emulsion, then heating the organic silicon pre-emulsion to carry out a water-phase hydrosilylation addition reaction, then dropwise adding the styrene-acrylic pre-emulsion to carry out suspension emulsion copolymerization, and then demulsifying and drying to obtain the styrene-acrylic resin modified organic silicon elastomer toughening agent with the core-shell structure.

The application provides a method for preparing isobutylbenzene from benzene and butene, which comprises four reactions in sequence; the first reaction is to synthesize sec-butylbenzene from benzene and butene; the second reaction is to generate 2-phenyl-2-butene by dehydrogenation of sec-butylbenzene; the third reaction is to generate 2-methyl-1-phenylpropene by isomerization of 2-phenyl-2-butene; and the fourth reaction is to generate isobutylbenzene by hydrogenation of 2-methyl-1-phenylpropene; the butene comprises 1-butene and / or 2-butene. The method uses benzene and butene as raw materials, adopts a four-step continuous series fixed-bed reaction process to synthesize isobutylbenzene, is simple to operate, can realize continuous production, does not need to use the metal potassium-sodium catalyst used in the traditional isobutylbenzene synthesis process, has small safety risk, and is suitable for industrialized production of isobutylbenzene.

Applications of a diphenylpropenone compound of general formula (I), or a stereoisomer thereof, or a geometric isomer thereof, or a tautomer thereof, or a solvate thereof, or an acceptable animal feed salt, in the preparation of an animal feed additive or feed. Confirmed by animal breeding trials, the diphenylpropenone compound, or a stereoisomer thereof, or a geometric isomer thereof, or a tautomer thereof, or a solvate thereof, or an acceptable animal feed salt, can be used as the animal feed additive or animal feed. The weight of the animals can be effectively increased, survival rates can be enhanced, and the compound has a good effect on improving animal production performance.

The invention provides a preparation method of isobutylbenzene, which comprises the following steps: under a gas-solid reaction condition, in the presence of a catalyst, gas-phase toluene, propylene and hydrogen are subjected to a contact reaction in a microchannel reactor, and active components of the catalyst comprise alkali metal and Cu. According to the method disclosed by the invention, the reaction can be carried out under a gas-solid contact reaction condition, so that the catalyst does not need to be separated from a reaction product, and the reaction product does not need to be separated after the catalyst is inactivated by water or methanol (because the reaction speed of water or alcohol and alkali metal is high, a large amount of heat is released, and a fire risk is caused, and the risk is very high); therefore, the risk of the method is greatly reduced; the method provided by the invention can be used for reacting under a relatively low pressure condition, and the pressure is greatly reduced compared with the pressure (2-4Mpa) required by the traditional kettle reaction.

An antiperspirant composition comprising an antiperspirant agent is described. The antiperspirant agent comprises an optionally substituted benzenepropenoic acid. Also described is the optionally substituted benzenepropenoic acid that is optionally in combination with an ester of gallic acid. Methods and uses of the antiperspirant composition and the antiperspirant agent, such as for reducing or preventing perspiration, are also described.

This document describes antiperspirant compositions comprising an antiperspirant. The antiperspirant comprises optionally substituted benzenepropenoic acid. Optionally substituted benzenepropenoic acid, optionally combined with an ester of gallic acid, is also described. Methods and uses of the antiperspirant compositions and antiperspirants, for example, to reduce or prevent sweating, are also described.

The present application relates to the technical field of functional resin, aiming at the problem that the existing polyorganosiloxane and PC resin are prone to phase separation, and the mechanical properties of the toughened modified PC resin material are obviously reduced, the present application discloses a kind of phenylpropene resin coated organic silicon elastomer SA@SE and its preparation method and application, the SA@SE has shell-core structure, the shell of the SA@SE is linear structure or slightly crosslinked phenylpropene resin, the core of the SA@SE is the polyorganosiloxane elastomer formed by hydrogen-containing polysiloxane, ethylene polysiloxane and third functional component through silicon hydrogenation addition reaction, and the third functional component is selected from styrene, allyl phenyl ether, allyl benzyl ether, cyclohexyl vinyl ether and the like.The SA@SE of the present application is a copolymer grafted and bonded between the inner and outer core-shell through covalent bond, which can realize the mutual solubility with bisphenol A type PC resin and the like, avoid phase separation and delamination, and improve the toughening and impact resistance of the modified PC resin.

The present application relates to PC resin toughening agent technical field, aiming at the problems of poor mutual solubility of organic silicon material and PC resin, poor low-temperature toughening performance of traditional toughening agent, etc., the present application discloses a kind of shell-core structure phenylpropene resin modified organic silicon elastomer toughening agent and its preparation method and application, including the following steps: hydrogen-containing silicone oil, vinyl silicone oil, third alkenyl functional component and catalyst are uniformly mixed, pre-emulsification is carried out under the action of surface active agent and thickening agent, and organic silicon pre-emulsion SiE is obtained;Another alkenyl phenyl compound, acrylic ester and / or crosslinking agent are uniformly mixed, then molecular weight regulator and oil-soluble initiator are added, pre-emulsification is carried out under the action of surface active agent and water, and phenylpropene pre-emulsion SAE is obtained;Then, organic silicon pre-emulsion is heated first to carry out water-phase silicon hydrogenation addition reaction, then phenylpropene pre-emulsion is added dropwise to carry out suspension emulsion copolymerization, then demulsification, drying, and the shell-core structure phenylpropene resin modified organic silicon elastomer toughening agent can be obtained.

The invention relates to the technical field of functional resin, and discloses a styrene-acrylic resin coated organosilicon elastomer SA (at) SE and a preparation method and application thereof in order to solve the problems that existing polysiloxane and PC resin are prone to phase separation, and consequently the mechanical performance of a toughening modified PC resin material is obviously reduced. A shell layer of the SA (at) SE is styrene-acrylic resin of a linear structure or lightly crosslinked, an inner core of the SA (at) SE is a polysiloxane elastomer formed by hydrosilylation addition reaction of hydrogen-containing polysiloxane, ethylene polysiloxane and a third functional component, and the third functional component is selected from styrene, allyl phenyl ether, allyl benzyl ether, cyclohexyl vinyl ether and the like. The SA-SE is a copolymer formed by grafting and bonding an inner core shell and an outer core shell through covalent bonds, mutual dissolution of the SA-SE with bisphenol A type PC resin and the like can be achieved, phase separation and layering are avoided, and the performance effects of toughening, impact resistance and the like of the modified PC resin can be improved.

The invention relates to a gas-phase reactor for synthesizing isopropyl toluene through an alkylation method and a synthesis method thereof.The gas-phase reactor comprises a reaction tank, a feeding bin arranged at the top of the reaction tank, two gas pipes symmetrically installed at the two ends of the reaction tank and gas inlet cavities formed in the bottoms of the gas pipes. According to the gas-phase reactor, an output shaft of a motor has a dual-drive function; synchronous linkage control of stirring and mixing and alternate opening and closing of the gas pipe can be realized without additionally arranging an electric valve control element, so that the failure rate and the energy consumption of the system are reduced, and the explosion-proof safety of the equipment under the flammable and explosive alkylation reaction working condition is improved; meanwhile, the rhythm of alternate opening and closing of the gas pipe is accurately matched with the stirring and mixing action, intermittent alternate feeding of toluene and propylene can be realized, the problem of violent local reaction caused by one-time excessive mixing of the two raw materials is effectively avoided, the reaction process is ensured to be stable and controllable, and the product yield of isopropyl toluene is increased.

The invention belongs to the technical field of photocatalysis, and provides a cis-isomerization method for allylbenzene compounds. The cis-isomerization method for the allylbenzene compound comprises the following steps: mixing the allylbenzene compound, a catalyst and a solvent in a nitrogen atmosphere, and carrying out cis-isomerization reaction under the irradiation of visible light, the catalyst is carbon quantum dots. According to the method, the allyl benzene compound is taken as a substrate, the carbon quantum dots are taken as a catalyst, efficient conversion of the cis-isomer is realized under the irradiation of visible light, and a light source is mild and safe; the carbon quantum dots as the catalyst are simple in source, green and environment-friendly, and easy to prepare and recover; reaction conditions are mild, high temperature and high pressure are not needed, and energy consumption and equipment requirements are effectively reduced; the solvent system is low in toxicity, simple to operate and suitable for industrial popularization; the method has good substrate compatibility and is suitable for various functional group substituted allyl benzene compounds; the catalyst has high selectivity, can inhibit side reactions, and improves the yield and purity of cis-isomers.

The invention discloses a synthetic method for preparing 4-((E)-1, 3-butadiene-1-yl)-4 '-alkyl-1, 1'-biphenyl and a preparation method of the 4-((E)-1, 3-butadiene-1-yl)-4 '-alkyl-1, the method comprises the following steps: S1, Suzuki coupling reaction: carrying out Suzuki coupling reaction on alkylphenylboronic acid and p-bromobenzaldehyde in the presence of a palladium catalyst and alkali to obtain alkyl biphenyl formaldehyde; s2, aldol condensation reaction: carrying out aldol condensation reaction on the alkyl biphenyl formaldehyde and acetaldehyde under the catalysis of tetramethylammonium hydroxide to obtain alkyl biphenyl acrolein; and S3, carrying out Wittig reaction, namely carrying out Wittig reaction on the alkyl biphenyl acrolein and a phosphorus ylide reagent generated by reaction of methyl triphenyl phosphonium bromide and strong base, so as to obtain the 4-((E)-1, 3-butadiene-1-yl)-4 '-alkyl-1, 1'-biphenyl. According to the invention, through an elaborately designed synthesis route and selection of a key catalyst, aldehyde groups do not need to be protected, after direct coupling, aldol condensation is carried out by utilizing the aldehyde groups to extend carbon chains, and the alkyl biphenyl diene liquid crystal monomer is efficiently and highly selectively synthesized.

This invention discloses a bipyrrole-based axially chiral phase transfer catalyst, its preparation method, and its application, belonging to the technical field of axially chiral phase transfer catalysts. The axially chiral compound (S)-1,9-diphenyl-5-((S)-1-phenylethyl)-5,6-dihydro-4H-dipyrrolo[1,2-b:2',1'-g][1,2,5]triazacycloheptane-3,7-dicarboxylic acid diethyl ester is used as a nucleophile to attack the partially positively charged carbon atom in the benzyl bromide reagent, replacing its bromide ion to generate a quaternary ammonium ion intermediate. The bromide ion attack causes the C-N bond to break, and the phenylethyl group on the quaternary ammonium ion intermediate detaches, forming a chiral tertiary amine with a benzyl group. Subsequently, it undergoes a quaternization reaction with excess benzyl bromide to obtain the chiral phase transfer catalyst. The prepared catalyst exhibits good catalytic activity in the [3+2] cycloaddition reaction of 2-(morpholine-4-carbonyl)allyl benzenesulfinate with phenylacryloylbenzene. The preparation method is simple and has broad application prospects.

This invention belongs to the field of chemical synthesis technology, specifically relating to pyrido[1,2-a]pyrimidinone derivatives containing β-phenylpropenyl groups, their preparation methods, and applications. This invention provides a pyrido[1,2-a]pyrimidinone derivative containing β-phenylpropenyl groups, which exhibits extremely high insecticidal activity against pests, has a broad insecticidal spectrum, and has broad application prospects in the preparation of insecticides. Furthermore, the preparation method of this pyrido[1,2-a]pyrimidinone derivative containing β-phenylpropenyl groups has the advantages of readily available raw materials, mild reaction conditions, and high yield, making it very suitable for large-scale industrial production.