171 results about "Allyl bromide" patented technology

The invention discloses a preparation method of a high-performance fingerprint-resistant agent. The preparation method includes the following steps that hydroxyl-terminated perfluorinated polyether and allyl bromide react to obtain allyl-terminated perfluorinated polyether; allyl-terminated perfluorinated polyether and hydrogen-containing silicone oil are subjected to a layer adding reaction through silicone hydrogen, and perfluorinated polyether-hydrogen-containing silicone oil (unreacted hydrogen still exists in silicone oil) is obtained; the obtained product and allyl siloxane continue to be subjected to a silicone hydrogen water adding reaction to obtain a needed target product pectinate perfluorinated polyether-siloxane; then pectinate perfluorinated polyether-siloxane is prepared into the fingerprint-resistant agent. The prepared fingerprint-resistant agent has the advantages of being good in hydrophobic and oleophobic performance, excellent in anti-fouling property and good in fingerprint easy-to-move property, a fingerprint-resistant coating and a glass base material are high in bonding force, the product is good in abrasion resistance, and compared with the prior art, the durability and abrasion resistance of the fingerprint-resistant agent are greatly improved.

The invention discloses an affinity chromatography medium employing tetrapeptide as a functional ligand and a preparation method of the affinity chromatography medium. The method comprises the following steps: adding dry matrix and allyl bromide to a dimethyl sulfoxide solution, activating, and reacting activating matrix with N-bromo succinimide; enabling bromo alcoholized matrix to react with hexamethylendiamine to obtain amino activating matrix; sequentially washing with deionized water, absolute ethyl alcohol and anhydrous N,N-dimethyl formamide, adding an N,N-dimethyl formamide solution containing tetrapeptide, 2-(7-azobenzotriazole)-N,N,N',N'-te-tramethyluronium hexafluorophosphate and N,N-diisopropylethylamine, and coupling a tetrapeptide ligand; and putting a medium coupled to tetrapeptide in a mixed liquid of sodium acetate and acetic anhydride to obtain the affinity chromatography medium employing tetrapeptide as the functional ligand. According to the novel chromatography medium developed by the method, a functional group is tetrapeptide composed of tyrosine, phenylalanine, arginine and histidine, and is designed on the basis of a protein A binding site of an antibody Fc segment; the antibody binding selectivity is greatly improved; and the affinity chromatography medium can be applied to efficient separation of an antibody.

The invention discloses a method for synthesizing polysiloxane which contains bis-hydroxyl alkyl at one end. In the preparation method, allyl bromide, 2, 2-dimethylol propionic acid, hexamethyldisilazane and D3 (hexamethylcyclotrisiloxane) are used as initial raw materials on which esterification reaction, hydroxyl group protection, anionic ring opening polymerization, hydrosilylation and alcoholysis reaction are carried out to obtain a target compound of the polysiloxane which contains bis-hydroxyl alkyl at one end, and the purity of the product is higher than 98 percent. The invention has the advantages of mild reaction condition, available raw materials, high yield and purity of the product, etc.

The invention provides a viscosity reduction type composite polycarboxylic acid water reducing agent. The viscosity reduction type composite polycarboxylic acid water reducing agent is prepared from a polycarboxylic acid water reducing agent A, a polycarboxylic acid water reducing agent B, a polycarboxylic acid water reducing agent C, a beta-cyclodextrin derivative, methyl-beta-cyclodextrin and de-ionized water, wherein the polycarboxylic acid water reducing agent A is prepared from the following preparation raw materials: isopentenyl polyoxyethylene ether, acrylic acid, an initiator 1, a chain transferring agent 1 and de-ionized water; the polycarboxylic acid water reducing agent B is prepared from the following preparation raw materials: methylallyl polyethylene glycol ether, acrylic acid, sodium methallyl sulfonate, an initiator 2, a chain transferring agent 2 and de-ionized water; the polycarboxylic acid water reducing agent C is prepared from the following preparation raw materials: diallyl capped polyether, acrylic acid, methylallyl polyethylene glycol ether, an initiator 3, a chain transferring agent 3 and de-ionized water; the diallyl capped polyether is prepared by carrying out allylation capping on the methoxy polyethylene glycol through allyl bromide; the beta-cyclodextrin derivative is beta-cyclodextrin modified by sodium dodecyl sulfonate and carbon nanotubes.

The present invention discloses a fire retardation powder styrene butadiene rubber preparation method, which comprises respectively adding deionized water, an emulsifier and a molecular weight modifier to a butadiene-styrene latex, adding a grafting monomer trihalo phenyl allyl carbonate and an initiator, carrying out a grafting reaction for 3-6 h, adding a second grafting monomer allyl bromide and an initiator, carrying out the secondary grafting reaction for 2-4 h, adding a termination agent to obtain a fire retardation type graft latex, sequentially adding a separation agent, a coagulating agent and a buffer to the fire retardation type graft latex, and then carrying out aging, washing, dewatering and drying to obtain the fire retardation powder styrene butadiene rubber product. With the method, the fire retardation group can be effectively embedded into the main chain of the polymer, the prepared fire retardation powder styrene butadiene rubber has the excellent fire retardation effect, the production cost is low, and popularization and application are easily achieved, wherein the oxygen index can achieve more than 38%.

The invention discloses a preparation method of tert-butyl (3R, 4S, 5S)-5-hydroxy-3-methyl-7-ocentyl-4-carbamate. The preparation method comprises the following steps: using N-tert-butoxycarbonyl-L-isoleucinal and allyl bromide as raw materials to prepare a crude product with a higher diastereoselectivity through a Barbier reaction; then performing column chromatography separation and purification to obtain the tert-butyl (3R, 4S, 5S)-5-hydroxy-3-methyl-7-ocentyl-4-carbamate. The synthetic product of the invention can be used as an intermediate for synthesizing a key synthon Dil of aplysiatoxin 10; the method of the invention is low in raw material cost, mild in reaction condition, short in reaction time, and easy to operate.

The invention discloses alpha,omega-(dihydroxyethyl) aminopropyl terminated polysiloxane, a synthetic method and a midbody thereof. The structure of the alpha,omega-(dihydroxyethyl) aminopropyl terminated polysiloxane is shown in the formula (I) described in the specification. A synthetic route is as follows: a target compound, namely the alpha,omega-(dihydroxyethyl) aminopropyl terminated polysiloxane, is obtained through hydroxyl protection, alkylation, hydrosilylation, alcoholysis and equilibrium polymerization by taking diethanol amine, hexamethyldisilazane, allyl bromide (or allyl chloride or allyl iodide), tetramethyldisiloxane and D4 as starting materials. Because two molecular ends of the alpha,omega-(dihydroxyethyl) aminopropyl terminated polysiloxane respectively have two hydroxyalkyl groups, the alpha,omega-(dihydroxyethyl) aminopropyl terminated polysiloxane can be reacted with other substances to obtain a polysiloxane modified material.

The invention discloses a fluoride-containing silicone oil defoamer and a preparation method thereof, the fluoride-containing silicone oil defoamer has a structural formula as shown in formula I, the method is as follows: addition reaction of hexafluoropropene dimmer and allyl bromide under the effect of potassium fluoride or cesium fluoride for preparation of fluorinated olefin, hydrosilylation reaction of the fluorinated olefin and dichloromethylsilane for preparation of fluoride-containing dichlorosilane, hydrolysis of the fluoride-containing dichlorosilane and dimethyldichlorosilane in neutral or weak alkaline condition, and final condensation polymerization of hydrolysate in alkaline conditions by use of hexamethyldisiloxane as an end-capping reagent for preparation of the fluoride-containing silicone oil defoamer. The fluoride-containing silicone oil defoamer can effectively reduce the polymer surface energy, is better in defoaming effect, can effectively reduce the solubility in the oil phase, increases the polymer high temperature resistance and chemical stability, can inhibit the foam generation in a long period, is small in dosage, simple in technical process, low in production cost, and suitable for large-scale industrial production, and the lowest concentration can be 3ppm of system concentration.

The invention provides a new method for synthesizing homoallylic alcohol. The method comprises the following steps of: making aromatic aldehyde and allyl bromide as raw materials react at room temperataure by using magnesium powder as an accelerator; extracting with diethyl ether and then drying; evaporating out the solvent; and then carrying out column chromatography separation to obtain a single homoallylic alcohol product. The method has the advantages of high productivity and high product quality, wherein the productivity can be higher than 80 percent, and the purity can be higher than 99 percent. In the invention, catalysts and organic solvents are not used, thereby the pollution of the catalysts and the solvents to the environment is reduced, and environmentally friendly chemical synthesis is realized; the reaction is carried out at room temperature, thus the reaction condition is moderate, the reaction time is short, and the efficiency is high; and the method has simple process, is easy and convenient to operate and is easy to realize industrial production.

The invention provides a silane modified polyether and a preparation method thereof. According to the silane modified polyether with the structure shown in a formula (I), the polyether is prepared byselecting specific raw materials and adjusting the molecular weight of the polyether and the type of a silane end capping agent, the adjustment of the mechanical strength and curing rate of an MS polymer can be achieved, MS adhesives with a series of strengths and curing speeds are obtained when the polyether is used in formulas, the synthesis of a polyether intermediate in the method does not need to use a catalyst, the reaction conditions are simple and controllable, a toxic reagent allyl chloride/allyl bromide is not used, chain extension is not needed (a chain extender methylene halide cannot be used), an organotin catalyst used in silane modified polyurethane is also avoided, no salt by-products are produced, the silane modified polyether is safe, environmentally friendly and free ofpollution, and the preparation method is an environment-friendly and energy-saving method for synthesizing the polyether.

The invention belongs to the field of photosensitive high polymer materials. After a hydrogen abstraction type photoinitiator absorbs light energy, the photoinitiator produces a bimolecular action with an auxiliary initiator in an excited state to generate a living free radical and initiate monomer polymerization. A one-component hydrogen abstraction type photoinitiator introducing a benzophenonestructure containing an unsaturated bond alkyl chain in a molecular structure is synthesized by using 4-hydroxybenzophenone and allyl bromide as raw materials. The invention provides a preparation method of a benzophenone type derivative photoinitiator; a reaction process is simple, and a reaction condition is mild; the maximum absorption wavelength of a product has a certain degree of red shift relative to that of benzophenone (BP), and the light absorption capacity of the photoinitiator is greatly enhanced; compared with that of traditional benzophenone, the efficiency of initiating oligomers is improved to a certain extent; and all performance is superior to that of the benzophenone, the photoinitiator can replace the benzophenone and has wide application prospects in the field of ultraviolet light curing.

A method to halogenate butyl rubber in the absence of water and, more particularly, without the need for addition of neutralization agents. The butyl rubber contains at least 4.1 mol% of a multi-olefin and the multi-olefin serves as a sink for the hydrohalic Brnsted acids generated when a halogenation agent is added. This obviates the need for aqueous phase acid neutralization. The novel halogenated butyl rubber produced using the method advantageously possesses a high degree of desirable exo-allylic bromides with relatively low levels of the less desirable endo-allylic bromides.

The invention relates to a recyclable eugenol-based epoxy resin Vitrimer material and a preparation method of the recyclable eugenol-based epoxy resin Vitrimer material. Biomass-based eugenol is used as a raw material, an eugenol-based epoxy resin matrix similar to DGEBA is prepared through a two-step method including an allyl bromide substitution reaction and a m-chloroperoxybenzoic acid oxidation reaction, then the eugenol-based epoxy resin matrix is mixed with a dicarboxylic acid curing agent system containing and not containing dynamic bonds, curing is conducted in a gradient heating mode, and theeugenol-based epoxy resin Vitrimer material with a dynamic reversible exchange key anddisulfide bond is otained. The epoxy resin Vitrimer material has the advantages of high physical remodeling reprocessability, high chemical recovery efficiency and the like, and overcomes the defects that the traditional epoxy resin takes petrochemical resources as raw materials and is difficult to recycle after being used; and green development and sustainable utilization of the thermosetting polymer material are promoted.

The invention discloses a preparation method of an antibacterial polypropylene fiber non-woven fabric for a wiping paper. The preparation method comprises: dispersing graphene oxide in dimethylacetamide, adding mercapto-succinic acid and anhydrous triethylamine into the solution for a reaction, carrying out aftertreatment to obtain a material A, dispersing the material A in dimethylacetamide, adding curcumin and p-toluenesulfonic acid into the solution for a reaction, carrying out aftertreatment to obtain modified graphene oxide, uniformly mixing sodium dodecylbenzenesulfonate, sodium lauryl sulfate, sodium phosphate, modified graphene oxide, carbon nanotubes, nano-silver, aloe extract and water to obtain an immersion liquid, immersing a polypropylene fiber non-woven fabric in the immersion liquid, carrying out drying to obtain the immersed non-woven fabric, adding 5, 5-dimethyl hydantoin into the aqueous sodium hydroxide solution, adding methanol and allyl bromide into the solution for a reaction to obtain a hydantoin derivative, uniformly mixing acrylic resin, hydroxyethyl acrylate, octadecyl acrylate, hydantoin derivative, a light initiator and ethyl acetate, immersing the immersed non-woven fabric into the mixed solution, and carrying out drying, curing, chlorination, washing and drying.

The invention provides a method for synthesizing methyl dihydrojasmonate. 2-pentyl cyclopentenone is adopted as a raw material; the raw material and allyl zinc bromide are subjected to 1,4-Michael addition to form 2-pentyl-3-allyl cyclopentanone; the 2-pentyl-3-allyl cyclopentanone is oxidized by sodium periodate in the presence of a ruthenium trichloride hexahydrate catalyst to synthesize dihydrojasmonic acid; and then the dihydrojasmonic acid is esterified to form the methyl dihydrojasmonate. The raw material of the method is cheap and low in cost; the process is simple and convenient in operation; the reaction conditions are mild and easy to control; the synthesis route is short and the synthesis period is reduced greatly; and the reaction product is single, high in yield (up to 65 to 85 percent), less in environmental pollution, and environmentally-friendly.

This invention relates to a method for producing allyl chloro-silicane using rare-earth metal catalyst, comprising: under the catalyzing of rare-earth metal, dichlorosilane or trichlorosilane performs coupling reaction with allyl bromide to synthesize allyl chloro-silicane, which well solves some problems in current technology. The producing process characterizes: under the protection of nitrogen, dissolve the chloro-silicane and allyl bromide in organic solvent, and then add in rare-earth metal as catalyst, thoroughly stir and react, filtrate by stewing; vacuum distill the filtrate so as to obtain the allyl chloro-silicane monomer, with the formula(I): R(Allyl)xSi(Cl)y (1).

The invention belongs to the technical field of antibacterial materials and particularly relates to a double-bond-containing cyclic halamine antibacterial agent precursor as well as a preparation method and application of the cyclic halamine antibacterial agent precursor in the preparation of antibacterial plastic. The antibacterial precursor is a compound which has a structure represented by the formula (I) or the formula (II) and is synthesized from allyl bromide or allyl chloride and cyanuric acid as raw materials through simple reaction. The antibacterial plastic is prepared by mixing the double-bond-containing cyclic halamine precursor and general plastic, simultaneously adding an initiator and an antioxidant and placing into a torque rheometer by virtue of a one-step process to prepare the plastic containing cyclic imide functional groups and chlorinating the plastic to obtain the antibacterial plastic containing halamine functional groups. The halamine antibacterial agent prepared by the method is low in cost and simple in process, small in addition, lasting in antibacterial effect and broad-spectrum and efficient, has good antibacterial property and can be repeatedly halogenated to regenerate the bactericidal property; and the halamine antibacterial agent and multiple resin can be subjected to blending and injection molding.

The present invention relates to two magnolol derivatives and their preparation methods. In the concrete, one is compound 5,5'-dipropenyl diphenyl diphenol and its preparation method, said preparation method is characterized by making magnolol undergo the process of isomerization reaction to obtain said compound; and another derivative is compound 3,3'diallyl-5,5'-dipropenyl diphenyl diphenol and its preparation method, said method is characterized by including the following steps: making 5,5-dipropenyl diphenyl diphenol and allyl bromide undergo the process of Williamson reaction to synthesize allyl ether, then making Claisen rearrangement so as to obtain said derivative.

The invention relates to a method for synthesizing a hydrophilic adsorption chromatographic medium by using trihydroxymethyl aminomethane as a genin and agarose gel with high concentration and high crosslinking degree as a matrix. The medium surface of the agarose gel with high concentration and high crosslinking degree has high-density hydroxy for reaction; the agarose gel is activated by allyl bromide, epoxy chloropropane, 1-4-di-butane diglycidyl ether, pentaerythritol tetrol-triglycidyl ether, pentaerythritol tetrol-glycidyl ether or bromhydrin; and then the trihydroxymethyl aminomethane as the genin is added into the agarose gel, and the prepared medium is used as a hydrogen bond donor in a hydrophilic adsorption reaction. The medium prepared by the synthesizing method has the advantages of high rigidity, high genin density and strong selectivity, and is suitable for separating polyphenol protein, hydrophilic polypeptide and natural organic small molecules.

The invention relates to a method for synthesizing a hydrophile adsorption chromatography medium which takes gallic acid as the petunidin and the agarose gel with high concentration and high crosslinking degree as the stroma. The high concentration and high crosslinking agarose gel medium surface has high density reactionable hydroxyl group which is activated with allyl bromide followed by reacting with bromine water, and then gallic acid is added, and the prepared medium can be used as a hydrogen bond supplyer in the hydrophile adsorption reaction. The medium prepared by the synthesis method has strong rigidity, high petunidin density, high selectivity, and is fit for separating polyphenol protein, hydrophilic polypeptide and natural small organic molecules.

The invention relates to a method for using perfluoroalkyl-containing chain-terminated double-terminal functional group perfluoropolyether for producing single-terminal functional group perfluoropolyether. According to the method, through reaction of a perfluoroalkyl-containing compound, allyl bromide and the dihydroxy-terminal perfluoropolyether, perfluoroalkyl-containing chain-terminated perfluoropolyether allyl ether or the hydroxyl-terminated perfluoroalkyl-containing chain-terminated perfluoropolyether is obtained. Compared with the double-terminal functional group perfluoropolyether rawmaterial, the single-terminal functional group perfluoropolyether raw material produced through the method has more excellent smoothness, lubricity and rub resistance. A molecular chain of the single-terminal functional group perfluoropolyether is of a linear-chain structure, and has excellent flexibility, and an unfixed terminal has a very high degree of freedom after being rubbed.

The invention discloses a quercetin derivative and a preparation method and application thereof. The preparation method comprises the following steps: firstly using dichlorodiphenylmethane to protect quercetin o-diphenol hydroxyl, combining a benzyl protection group to obtain the selectively protected quercetin derivative, and then independently reacting with dimethyl sulfate, diethyl sulfate, allyl bromide, paratoluensulfonyl chloride and acetic anhydride respectively to generate corresponding quercetin derivatives. All of the prepared derivative compounds have NRK-49F proliferation activity inhibition superior to that of quercetin. The quercetin derivatives 20a-1, 14a-1 and 23d-1 compositely replaced by methyl and p-tosyl have higher inhibition NRK-49F proliferation activity, and the inhibition ratio respectively reaches 86.33%, 78.04% and 75.91%. Thus, the currently obtained quercetin derivative compounds have obvious inhibition effect on kidney fibroblast NRK-49F proliferation.

The present invention relates to a 2-tertbutyloxycarbonyl-7-carbonyl-5-O-2-spiro(3.4)octane synthesis method. A purpose of the present invention is mainly to solve the technical problems of high price of the reagent used in the existing synthesis route, high risk and no suitability for industrial production. According to the present invention, the three-step method is used to synthesize, wherein the first step is that a saturated ammonium chloride aqueous solution of zinc powder is added to a tetrahydrofuran solution of 1-tertbutyloxycarbonyl-3-azetidinone, then allyl bromide is added in a dropwise manner, and the reaction solution reacts at a room temperature overnight to obtain 1-tertbutyloxycarbonyl-3-allyl-azetidinol, the step is that an aqueous solution of sodium hydrogen sulfite is added to an acetonitrile aqueous solution of the 1-tertbutyloxycarbonyl-3-allyl-azetidinol and sodium periodate, and stirring is performed for 16 h at a temperature of 80 DEG C to obtain 2-tertbutyloxycarbonyl-7-hydroxy-5-O-2-azaspiro(3.4)octane, and the third step is that pyridinium chlorochromate is added to a dichloromethane solution of the 2-tertbutyloxycarbonyl-7-hydroxy-5-O-2-azaspiro(3.4)octane under ice bath, and a reaction is performed at a room temperature overnight to obtain the 2-tertbutyloxycarbonyl-7-carbonyl-5-O-2-spiro(3.4)octane.

The invention relates to a chromatography medium adopting tryptamine as a functional ligand. The chromatography medium comprises a chromatography matrix and a ligand, wherein the chromatography matrixis hydrophilic porous microspheres, and the ligand is trytamine coupled after being activated by bromoacetyl bromide. The chromatography medium is high in antibody adsorption capacity, the saturatedadsorption capacity can reach 140mg/ml of wet medium, and the processing capacity is high; and the medium is stable in characteristics, and the ligand is activated and coupled by adopting the allyl bromide, so that the ligand of the medium is stable, and convenience in cleaning and regeneration can be realized.

The invention provides an organic luminescent material, i.e. a terphenyl bridged-bis-benzimidazole quaternary ammonium compound, a preparation method and application thereof. The preparation method comprises the following steps: taking inorganic base as an acid-binding agent, and leading one time of a terphenyl bridged-bis-benzimidazole compound and 4-12 times of halogenated hydrocarbon or halogenated alkene (such as methyl iodide, bromoethane and allyl bromide) in an organic solvent to react for 6-18 hours to obtain a series of the terphenyl bridged-bis-benzimidazole quaternary ammonium compounds. The compound can be used as the organic luminescent material and applied to the fields such as a luminescent device, a photocell, an organic light-emitting diode, a bio-fluorescent probe or a novel fluorescent tracer for a water treatment agent and the like.