989 results about "Allyl alcohol" patented technology

The present application teaches a coating having a biologically compatible compound conjugated to, or blended with, a polymer, wherein the polymer includes at least one olefin-derived unit and at least one unit derived from a vinyl alcohol, an allyl alcohol, or derivatives thereof.

The invention provides derivatives of poly(styrene-co-allylalcohol). These materials are useful as thermosetting monomers that can be incorporated into adhesive compositions. In some embodiments, the adhesive compositions are useful in the microelectronic packaging industry.

A process for the production of 4-hydroxybutyraldehyde is described. The process comprises reacting allyl alcohol with a mixture of carbon monoxide and hydrogen in the presence of a solvent and a catalyst system comprising a rhodium complex and a 2,3-O-isopropylidene-2,3-dihydroxy-1,4-bis[bis(3,5-di-n-alkylphenyl)phosphino]butane. The process gives high yield of 4-hydroxybutyraldehyde compared to 3-hydroxy-2-methylpropionaldehyde.

The invention relates to a preparation method and application of unsaturated polyether. The preparation method comprises the following steps: (1) adding unsaturated alcohol and a catalyst into a first reactor, replacing with nitrogen, continuously adding epoxide with short branches and reacting to obtain an intermediate product A, wherein the unsaturated alcohol is one or a mixture of more than two of methyl allyl alcohol and isoamyl alcohol at any proportion and the mass ratio of the unsaturated alcohol to epoxide is 1.0:(0.1-5.0); and (2) putting the intermediate product A obtained in the step (1) and the catalyst into a second reactor, replacing with nitrogen, continuously introducing ethylene oxide and reacting to obtain polyether B, and neutralizing the pH value of the polyether B product to be 5-7 with a neutralizing reagent, wherein the mass ratio of the intermediate product A to ethylene oxide is 1.0:(15.0-51.0). The invention also provides the unsaturated polyether prepared by the preparation method, which is disclosed by the invention and application of unsaturated polyether in synthesis of polycarboxylic water reducer and the water reducer prepared from the unsaturated polyether synthesized by the method has the advantages of low doping amount, high water reduction rate, good slump-retaining agent and like.

A method of preparing an olefin comprising: reacting a polyol in the presence of a carboxylic acid, such that an olefin is produced by the deoxygenation of the polyol. The reacting step can comprise (a) providing a composition comprising the polyol, (b) heating the composition, and (c) introducing the carboxylic acid to the composition wherein the introducing step occurs prior to, at the same time as, or subsequent to the heating step. In one embodiment, the polyol is glycerol, the carboxylic acid is formic acid, and the olefin is allyl alcohol, which is produced at a yield of about 80% or greater.

The invention belongs to the technical field of chemical engineering, and discloses polyether modified organic silicone oil that adopts a comb structure shown in formula (1) and a preparation method and application as a defoamer, and overcomes the service restrictions of conventional organic silicone defoamers. The preparation method comprises the following steps: compounds such as short polyols polydimethyl siloxane or polymethyl phenyl siloxane in which end groups are hydrogen, allyl alcohol polyether, aliphatic esters or alkanes amides that contain end alkenyl are selected as raw materials to synthesize the polyether modified organic silicone oil. According to the invention, as a defoamer, the polyether modified organic silicone oil has good characteristics of self-emulsifying property, self-dispersing property, steady emulsifying property, good defoaming and foam inhibiting performance, high temperature resistance, and acid and alkali resistance.

A method comprising the steps of: (A) forming a fluid comprising a crosslinked polymer, wherein the crosslinked polymer comprises: (i) a first monomeric unit of one or more N-vinyl lactams; and (ii) a crosslinker selected from the group consisting of: divinyl ether, diallyl ether, vinyl or allyl ethers of polyglycols or polyols, divinylbenzene, 1,3-divinylimidazolidin-2-one, divinyltetrahydropyrimidin-2(1H)-one, dienes, allyl amines, N-vinyl-3(E)-ethylidene pyrrolidone, ethylidene bis(N-vinylpyrrolidone), and any combination of any of the foregoing; and (B) introducing the fluid into a portion of a well. The crosslinked polymer may additionally comprise: a second monomeric unit selected from the group consisting of: acrylamide, N-substituted acrylamides, methacrylamide, N-substituted methacrylamides, acrylates, methacrylates, acrylic acid, methacrylic acid, N-vinylamides, N-allyl amides, vinyl alcohol, vinyl ethers, vinyl esters, allyl alcohol, allyl ethers, allyl esters, vinylpyridine, vinyl sulfonates, allyl sulfonates, vinylimidazole, allylimidazole, diallyldimethylammonium chloride, and any combination of any of the foregoing.

A medical device with a hydrophilic and lubricious coating, wherein the coating includes a hydrophilic polymeric unit layer deposited on the medical device and cross-linked with a plasma deposited double bond monomer. The hydrophilic polymeric unit can include ethylene oxide with one or more primary or secondary alcohol groups or glycosaminoglycans such as hyaluronic acid, and the double bond monomer includes monomers containing at least one double bond, preferably a C═C, C═N or C═O bond, including N-trimethylsilyl-allylamine, ethylene, propylene and allyl alcohol.

The invention provides a method for preparing ester terminated allyl alcohol polyether, which has simple process and realizes diversity of ester terminated allyl alcohol polyether monomer structure. The method for preparing the ester terminated allyl alcohol polyether comprises the following steps: allyl alkyl acid ester is used as initiator and ternary metal oxide is used as catalyst to ensure that oxirane and/or propylene epoxide perform a ring-opening polymerization reaction at 100-140 DEG C under the pressure of 0.1 to 0.6MPa; the ester terminated allyl alcohol polyether can be obtained after the catalyst is filtered and removed, wherein the ternary metal oxide catalyst is prepared from soluble salt of Mg, Al and Ca through alkaline precipitation and calcination. The preparation process is simple without using organic solvent, can be completed in one step by continuously adding materials in the same reactor. The prepared ester terminated allyl alcohol polyether monomer molecule has diverse structures, adjustable amphipathic property and controllable molecular weight, and can be polymerized with multiple unsaturated monomers.

The invention discloses a preparation method for a high-slump-retention polycarboxylate water reducer. The preparation method comprises the following steps of: esterifying methoxylpolyethylene glycol monomethyl ethers with different molecular weights with methacrylic acid and a mixed polymerization inhibitor for a period of time under the action of a catalyst and at a certain temperature, then adding allyl alcohol in one time, further esterifying in the same conditions to obtain an esterified macromonomer MP containing crosslinking monomer allyl methacrylate; then performing aqueous solution polymerization on the MP, unsaturated sulfonate, (meth)acrylate unsaturated monomers and a chain transfer agent in a low-temperature condition and within a redox initiation system; and finally adding caustic soda liquid to neutralize, so as to obtain the polycarboxylate water reducer with a certain concentration. The high-slump-retention polycarboxylate water reducer prepared by the preparation method disclosed by the invention is a high-performance water reducer which is prepared at a low temperature by virtue of a molecular structure design, as well as is high in slump retention, excellent in dispersing performance, good in adaptability, simple in process, pollution-free, low in energy consumption, and easy to realize industrialized production.

The invention discloses a method for preparing methyl allyl alcohol polyoxyethylene ether. In the method, methallyl alcohol and ethylene oxide undergo a polymerization reaction in the presence of a catalyst to form the methyl allyl alcohol polyoxyethylene ether. The catalyst is sodium methyl allyl alcohol or potassium methyl allyl alcohol; the molar charge ratio of the methallyl alcohol to the ethylene oxide is 1.0:(5.0-78.0); the amount of the catalyst is 0.10 to 0.60 weight percent based on the methallyl alcohol; and the reaction pressure is 0.10 to 0.40MPaG, the reaction temperature is 50 to 150 DEG C, and the reaction time is 3 to 7 hours. The key technical point of the method is that the instauration of the product is increased by over 10 percent by using the more ideal catalyst. The method can be used for preparing methyl allyl alcohol polyoxyethylene ethers with a weight-average molecular weight of 150 to 6,000.

The invention relates to a synthetic method of 2-methallyl alcohol. The synthetic method comprises the step of carrying out esterification reaction, refinement and separation and hydrolysis reaction on 2-methallyl chloride and sodium carboxylate to prepare 2-methallyl alcohol, wherein the formulas of the esterification reaction and the hydrolysis reaction are respectively formula (1) and formula (2) both referring to the description; the R is CH3 or CH3CH2, namely, methyl or ethyl. According to the invention, the synthetic method is reasonable in technology and easy to operate; the product is high selectivity and relatively high in quality; carboxylic sodium in the esterification reaction stage and water in the hydrolysis reaction stage are recycled and need no external supplement, so that cyclic utilization is achieved, and the product yield is improved.

A polymer coating for medical devices based on a polyolefin derivative. A variety of polymers are described to make coatings for medical devices, particularly, for drug delivery stents. The polymers include homo-, co-, and terpolymers having at least one olefin-derived unit and at least one unit derived from vinyl alcohol, allyl alcohol and derivatives thereof.

The invention discloses an in-situ polymerization intercalation-type composite gel material and a preparation method and application thereof. The preparation method comprises the following steps: (1) interlayer dressing agent and clay are dissolved in water and are stirred 40 minutes to 60 minutes at a stirring speed of 10,000 to 15,000 r/min till the mixture is mixed evenly, thereby obtaining the mixing solution of the clay; (2) water-soluble monomer and initiator are added in the solution and are stirred 20 to 40 minutes at a stirring speed of 500 to 1,000 r/min till the mixture is mixed evenly; and (3) the reaction of the mixture is carried out under 80 to 140 DEG C for 6 hours to 12 hours. Moreover, the water-soluble monomer is one of or the random combination of acrylamide monomer, acrylic acid monomer, acrylonitrile monomer, acrylic ester monomer, allyl alcohol monomer, allyl urea monomer, allyl ether monomer, allyl ester monomer, allyl ether ester monomer and allyl azide monomer. Because the interlayer dimension of the composite gel material is between 4.5 nm and 6.0 nm, the composite gel material has excellent mechanical strength, injection performance, temperature resistance, salt resistance and plugging performance, thereby having a broad application prospect in the preparation of material for profile control and water shutoff.

The invention discloses a preparation method of an organosilicon foam stabilizer applied to a single-component polyurethane foam sealing agent. The preparation method comprises the steps of (1) adding allyl alcohol, ethylene oxide and propylene oxide to a reaction kettle, and reacting under the action of a base catalyst at the temperature of 90-130 DEG C and pressure not more than 0.5MPa for 4-6h to obtain allyl-terminated copolymer ether; (2) reacting the polyether prepared in the step 1 with sodium at 85-120 DEG C, introducing excess haloalkane, and reacting for 4-6h to obtain methyl-terminated copolymer ether; (3) reacting octamethyl cyclotetrasiloxane, hexamethyl disiloxane and high-hydrogen-content silicone oil with hydrogen content of 1-2% in the presence of an acid ion exchanger to obtain low-hydrogen-content silicone oil with hydrogen content of 0.05-1.0%; (4) mixing the products obtained in the steps 1,2, and 3, adding a catalyst, and reacting under the condition of pressure being 0.5-2atm for 3-8h to obtain the organosilicon foam stabilizer. During foaming, the foam stabilizer has excellent dimensional stability and high foaming ratio and fluidity.

The invention belongs to the technical field of construction materials, and in particular relates to a poly carboxylic acid series water reducing agent with low content and high water-reducing rate, a synthetic method and a use method thereof. The water reducing agent comprises the following components: polyethylene glycol methyl ether methacrylate, 2-methyl allyl alcohol polyethenoxy ether, acroleic acid, methyl sodium allylsulfonate, ammonium persulfate, sodium hydroxide and water. The synthetic method comprises the following concrete steps: respectively preparing TPEG, SMAS, MPEGMA and AA into a mixed solution of which the concentration is 20%-50%, and simultaneously adding an amount of water to APS for dissolving; adding the prepared mixed solution of the TPEG and SMAS monomers to a reaction kettle, introducing nitrogen, inserting a condensing tube, stirring and heating to 60-100 DEG C, and respectively dropwise adding the mixed solution of the MPEGMA and AA monomers and the APS solution, wherein the time for dropwise adding the mixed solution of the monomers is 1-5 hours, and the time for dropwise adding the APS solution is 1.5-5.5 hours; after finishing dropwise adding, isothermally reacting for 0.5-1.5 hours; and cooling and neutralizing with an NaOH solution to obtain the required product. The invention has simple synthesizing process, stable performance of process products, low content, high water-reducing rate and good market prospect.

The invention discloses a high-double bond content allyl polyether production method and belongs to the technical field of polyether compound synthesis in organic chemistry. In an anoxic environment, at a temperature of 110-140 DEG C, under catalysis action of an allyl alcohol solution of sodium allylate, allyl alcohol and an epoxy compound are mixed and undergo a reaction, the reaction product is aged and cooled to form an allyl polyether crude product, the allyl polyether crude product and water are mixed, the mixture is neutralized and filtered, and a liquid phase is collected and is allyl polyether. The prepared allyl polyether has molecular weight of 200-8000, double bond content greater than or equal to 98% and a molecular weight distribution coefficient less than or equal to 1.05. In catalyst preparation, an outer circulation reaction vessel with two condensers utilizing a freezing liquid for condensation is used so that a reaction rate is accelerated, an allyl alcohol loss is less than 0.2% and environmental pollution is reduced.

The invention belongs to the field of chemical industry, and discloses a method for preparing 2-methyl allyl alcohol by esterification and hydrolysis. The method comprises the following steps of: first, performing esterification reaction of 2-methyl allyl chloride and carboxylate; and then, kalifying for hydrolysis reaction to synthesize 2-methyl allyl alcohol. The synthesizing steps are as follows: (1) esterification reaction: under the effect of a phase transfer catalyst, adding carboxylate, water and 2-methyl allyl chloride into a high pressure kettle for esterification reaction; after esterification reaction, cooling, standing and layering the reaction liquor to obtain an organic layer and a water layer, wherein the organic layer is a mixture which takes 2-methyl allyl carboxylate as a main product; (2) hydrolysis reaction: adding alkali liquor to the organic layer obtained in the esterification reaction stage for hydrolysis reaction; cooling, standing and layering the mixed liquor obtained by hydrolysis to obtain an organic layer and a water layer, wherein the organic layer is a target product, namely 2-methyl allyl alcohol. The method is high in material conversion ratio and product selectivity, the product yield is improved, and the separation energy consumption and material consumption are reduced.

The invention relates to a preparation method of a polyether modified polysiloxane defoaming agent, which consists of a polyether modified polysiloxane polymer and a silicone oil emulsion. Specifically, the polyether modified polysiloxane polymer is prepared by employing a bulk polymerization method to react hydrogen-containing silicone oil, allyl alcohol polyether and a catalyst. The hydrogen-containing silicone oil has a hydrogen content of 0.01-0.3mol/100g and a viscosity of 10-100cst. The allyl alcohol polyether has an average molecular weight of 200-3000g/mol and an unsaturation degree of 1-2mmol/g. The catalyst is chloroplatinic acid. The hydrogen-containing silicone oil and the allyl alcohol polyether are in a mole ratio of 1:(1-1.4). Compared with the solution method for preparation of the polyether modified polysiloxane polymer, the method provided in the invention has the advantages of no pollution, simple process, controllability, and low cost. The obtained polyether modified polysiloxane polymer can be compounded with the methyl silicone oil emulsion so as to obtain the polyether modified polysiloxane defoaming agent. With excellent defoaming and foam inhibiting properties, the defoaming agent is suitable for high temperature environment.

A direct hydrocarbonylation process for the production of 1,4-butanediol is described. The process comprises reacting allyl alcohol with carbon monoxide and hydrogen in an alcohol solvent in the presence of a catalyst system comprising a rhodium complex, a trialkyl phosphine, and a diphosphine. The process gives a high yield of 1,4-butanediol in a one-step reaction.

The present invention relates to a new-type high-effective agricultural pesticide suspension dispersing agent. It is characterized by that said dispersing agent is obtained by using (by mass%) 50-95% of unsaturated macromonomer with long-chain, 4-49% of unsaturated carboxylic acid or its derivative which can be ionized into carboxylic acid ions in water and 1-46% of other comonomer containing ethylenic bond through a certain copolymerization reaction. The described unsaturated macromonomer with long-chain is polyoxyethylene (methyl) acrylate compound or allyl alcohol polyoxyethylene oxyethylene ether. Besides, said invention also provides its preparation method.

The invention discloses a method for synthetizing diallyl polyether. A polymerization product which is prepared from ethylene oxide and propylene oxide by using allyl alcohol as a starting agent is polyether with the following general formula (I). The method is carried out according to the following process steps of: 1, adding an alkoxidation reagent into the polyether to perform alkoxidation reaction and removing methanol generated during the reaction; 2, then filling allyl chloride into a reaction kettle to continuously perform the reaction, wherein the charging molar ratio of the polyether to the allyl chloride is 1: (1.0-2.0) and a by-product is sodium chloride or potassium chloride; and 3, refining the product, i.e. firstly, distilling and recovering the unreacted allyl chloride and then filtering a crude product to obtain the refined product. The problems of poor reaction activity and low yield of termination of polyether containing a secondary hydroxyl group, particularly high molecular weight polyether are solved. Due to the selection of the alkoxidation reagent, not only is the problem of generating a highly toxic allyl alcohol by-product in the conventional allylation process solved, but also the product has high yield of termination.

The invention discloses a high-efficiency organic silicon defoaming agent and belongs to the technical field of fine chemical engineering. The defoaming agent consists of the following components in part by weight: 50 to 90 parts of mixture of hydroxyl silicone oil and 201 silicone oil, 2 to 15 parts of gaseous phase white carbon black, 2 to 12 parts of condensation compound of fatty alcohol and ethylene oxide, 1 to 6 parts of modified nonionic surfactant, 1 to 10 parts of allyl alcohol polyoxyl alkyl ether, 1 to 8 parts of propylene glycol block polyether, 3 to 20 parts of sorbitol anhydride monostearate, 3 to 20 parts of dehydrated sorbitol monostearate polyoxyl vinethene and 10 to 30 parts of water. The defoaming agent has the characteristics of high defoaming speed, strong foam inhibiting ability, no toxicity, high adaptability, small using amount and the like.

The invention discloses a method for synthesizing rosin or allyl ester which is rosin derivative, which comprises following steps: dissolving one of the rosin or the rosin derivative in aprotic solvent, adding acylate-chloridized agent, heating to enable reaction temperature to be in 0-85 DEG C, reacting for 0.5-5 hours, acylate-chlorizating carboxy group in the rosin or the rosin derivative, adding acid binding agent, polymerization inhibitor and allyl alcohol into the reaction product of the first step, reacting under 10-80 DEG C for 2-5 hours, removing the aprotic solvent, and obtaining the rosin or the rosin derivative, namely, allyl ester, wherein the using amount of the acid binding agent is 100-150% of the molar weight of carboxy group in the rosin or the rosin derivative and the using amount of the polymerization inhibitor is 1% of the allyl alcohol. Synthetical rosin or rosin derivative, namely, allyl ester, can generate radical polymerization and can be applied in the fields of coating material, cementing compound, printing ink, paper making and the like. The method has high technical efficiency and good product stability.

New protective coating layers for use in wet etch processes during the production of semiconductor and MEMS devices are provided. The layers include a primer layer, a first protective layer, and an optional second protective layer. The primer layer preferably comprises an organo silane compound in a solvent system. The first protective layer includes thermoplastic copolymers prepared from styrene, acrylonitrile, and compatible compounds such as monomers, oligomers, and polymers comprising epoxy groups; poly(styrene-co-allyl alcohol); and mixtures thereof. The second protective layer comprises a highly halogenated polymer such as a chlorinated polymer which may or may not be crosslinked upon heating.