236 results about "Epoxide" patented technology

The present invention relates to novel (per)fluoropolyether (PFPE) polymers, to a process for their manufacture and to their use as additives in coating compositions. Specifically, the invention relates to a (per)fluoropolyether polymer [polymer (PP)] comprising a (per)fluoropolyoxyalkylene chain [chain (Rpf)] having two chain ends bonded to opposite sides of said chain (Rpf), wherein: * one of said chain ends comprises at least one, preferably from 1 to 3, group (group [I]) selected from: alkoxysilane [group (Si)] or cross-linkable group, preferably selected from unsaturated moiety [group (U)] and epoxide [group (E)]; and * the other chain end comprises at least one, preferably from 1 to 3, group (group [II]) selected from: optionally substituted piperidine, optionally substituted pyridine or optionally substituted pyrrole.

The invention relates to a polyisobutylene polyether alcohol amine compounds and compositions thereof. The invention also is directed to a new process for making the polyisobutylene polyether alcohol amine compound(s) by reacting a polyisobutylene epoxide with a specific polyetheramine, a protic solvent, a diluent, and optionally a catalyst. In addition, the invention further relates to the many uses of the polyisobutylene polyether alcohol amine compound(s) and composition(s) including but not limited to its use in lubricants, surfactants, emulsifiers, adhesives, resins, and the like.

The invention relates to a new and improved process for making an epoxidized olefin, specifically, polyisobutylene epoxide. The inventive process generally comprises (a) combining a polyisobutylene and a solvent to form a first mixture, (b) combining a peroxide, a carboxylic acid and an acid catalyst to form a second mixture, (c) reacting the first and second mixtures forming a non-aqueous phase comprising a polyisobutylene epoxide and an aqueous phase; (d) separating the non-aqueous phase from the aqueous phase; (d) washing and neutralizing the non-aqueous phase, and (e) recovering in a high yield and high purity polyisobutylene epoxide. It was discovered that specific mole ratios and amounts of reactants provide for recovering in high yield and purity polyisobutylene epoxide with reduced detrimental by-products.

The invention relates to a method for synthesizing cyclic carbonate by catalyzing olefin oxidative carboxylation with a difunctional ionic liquid, which comprises the following steps: in a synthesis system, adding an oxidant and an additive into olefin serving as a raw material and the difunctional ionic liquid serving as a catalyst, and then carrying out epoxidation reaction; after the reaction is finished, potassium iodide and a carboxylation reagent are added into a reaction system, then cycloaddition reaction is performed, and finally cyclic carbonate can be prepared. The bifunctional ionic liquid is used as a catalyst, so that the olefin epoxidation reaction can be catalyzed, the cycloaddition reaction of an epoxide intermediate and CO2 can also be catalyzed, and the problem that a two-step reaction catalytic system is incompatible is solved. The adopted raw materials are cheap and easy to obtain, a metal-free catalyst is used, the method has the advantages of being economical and environmentally friendly, and an alternative scheme is provided for synthesis of cyclic carbonate.

A process for producing a thermoplastic polyoxazolidinone comprising copolymerizing a diisocyanate compound (A) with a bisepoxide compound (B) in the presence of a specific a quaternary ammonium, quaternary phoshonium and / or quaternary stibonium-based catalyst (C), a compound (D), a compound (F) wherein compound (D) and compound (F) independently comprises at least one of a monofunctional isocyanate, a monofunctional epoxide, a cyclic carbonate, a monofunctional alcohol, a monofunctional amine optionally in a solvent (E), and wherein the process is in the absence of a solvent (G) with a boiling point higher than 200° C., preferably higher than 190° C. and more preferably higher than 180° C. at 1 bar (absolute). The invention is also related to the resulting thermoplastic polyoxazolidinone.

The present invention relates to a bismuth-containing catalyst of formula (R1)2-(R2)-(Bi)3+ (I), wherein (R1)2- is a dianion of formula (II*), wherein A is unsubstituted or at least monosubstituted linear C3-30-alkylene, wherein at least two not adjacent CH2 groups of C3-30-alkylene are replaced by a heteroatom independently selected from the group consisting of O, S, 5 NH, N-C1-30-alkyl, N-C6-14-aryl and N-C7-30-aralkyl, wherein alkyl and aryl fragments of N-C1-30-alkyl, N-C6-14-aryl, N-C7-30-aralkyl may at least be monosubstituted by hydroxyl, halogen, -CF3, NH2, -NH-C1-6-alkyl, -NH- phenyl, -N(C1-6-alkyl)2, -N(phenyl)2, -SH, -S-C1-6-alkyl, -S-phenyl, -O-C1-6-alkyl or -O-phenyl, to process for the preparation of the bismuth containing catalyst, to a process for the preparation of a compound, oligomer or polymer comprising at least one urethane group using the bismuth-containing catalyst, to a composition comprising (i) at least one monoalcohol (B1) or polyol (B2), (ii) at least one polyisocyanate (A) and (iii) the bismuth-containing catalyst, to a coating or adhesive layer formed from the composition on a substrate, to a foam formed from the composition, and to the use of the bismuth-containing catalyst in for preparing compounds, oligomers or polymers comprising a urethane group, as esterification and transesterification catalyst and as catalyst for ring-opening polymerizations of lactones and epoxides.

The application relates to the technical field of catalysts, and discloses a nano magnesium oxide material and a preparation method and application thereof. The nano magnesium oxide material has a porous structure, wherein the particle size of the nano magnesium oxide is 20-200 nm; and the pore size of the porous structure is 5-45 nm. The classical nucleation growth process of the magnesium oxide is directionally adjusted in a weak alkaline nucleation system, and then the nano magnesium oxide with a controllable grain size distribution is obtained. The nano magnesium oxide material has good catalytic activity in the synthesis of propylene carbonate from CO2 and an epoxide under the conditions of no solvent and no auxiliary agent, and the catalyst is not deactivated after multiple uses, and has good stability.

The application belongs to the field of high polymer chemistry, and relates to a hyperbranched carbon dioxide-based polycarbonate as well as a preparation method and application thereof. The hyperbranched carbon dioxide-based polycarbonate is prepared by self-condensation polymerization of a monomer shown in formula I; in formula I, it is a three-arm structural unit derived from an initiator; and it is a carbon dioxide-based polycarbonate segment obtained by ring-opening addition polymerization of an epoxide and carbon dioxide. Compared with the prior art, the application has the following advantages: the application uses triethylborane catalyst and a mixture of TBD or DBU as a catalyst, efficiently catalyzes copolymerization of carbon dioxide and an epoxide monomer to prepare a hyperbranched carbon dioxide-based polycarbonate with a new structure, and improves the glass transition temperature and fat dissolving performance of the polymer.

Provided is an emulsion-type epoxy resin curing agent composition that contains component (A): a reaction composition obtained by reacting 1.0-2.8 mol of a cyclic structure–containing polyamine (a2) with 1.0 mol of a polyepoxy compound (a1), component (B): a nonionic emulsifier having an HLB value of 14.0 or more and having an aromatic ring, component (C): a cosolvent, and water. Also provided is an aqueous epoxy resin composition that includes said composition.

The invention relates to a method for comprehensively utilizing kettle residues of an arylamine chain extender, which comprises the following steps: by taking the kettle residues formed by ester exchange and recrystallization of 1, 3-propylene glycol and para aminobenzoate as an initiator, carrying out addition reaction on the initiator and epoxide under the conditions that the temperature is 95-105 DEG C, the pressure is 0-0.15 MPa and no additional catalyst is added, thereby preparing liquid aromatic polyol, the aromatic polyol is a viscous liquid at room temperature, does not need to be heated and melted before use, has the functionality of 2.5-2.9, and can be used as a curing agent of polyurethane, and when the aromatic polyol is used as the curing agent, a polyurethane paving material, a polyurethane waterproof coating, a polyurethane adhesive and a polyurethane pouring sealant prepared from the aromatic polyol have good physical properties. The problem of environmental pollution caused by solid waste is solved, the resource utilization rate of substances is increased, the treatment process is simple and convenient, and the method is suitable for industrial treatment of kettle residues.

The present invention relates to catalyst composition for cyclic carbonate production from CO2 and epoxides under mild conditions, which can effectively catalyze the cyclic carbonate synthesis and provides good selectivity to cyclic carbonate, wherein said catalyst composition comprising:a) the metal complex as shown in structure (I):wherein,M represents transition metal atom;R1, R2, and R3 represent independent group selected from hydrogen atom, halogen atom, alkyl group, alkenyl group, alkynyl group, alkoxy group, amine group, phenyl group, benzyl group, cyclic hydrocarbon group comprising hetero atom, perfluoroalkyl group, or nitro group;R4 represents group selected from alkylene group, cycloalkylene group, or phenylene group;X represents group selected from hydrogen atom, acetate group, or triflate group; andb) the organic compound as the co-catalyst selected from compound containing nitrogen, compound of quaternary ammonium salts, or compound of iminium salts.

The present invention refers to a light emitting diode (LED) curable composition, wherein the composition comprises a cationic curable resin comprising a1) an epoxide, a2) an oxetane, a3) a cationic initiator, and a4) a photosensitizer, wherein the weight ratio between the epoxide a1) and the oxetane a2) is in the range of 1-5. The present invention also refers to the use of said LED curable composition for producing a coating that is cured with a LED light source at a wavelength in the range of 275-405 nm.

The invention discloses a hydroxymethyl phosphonate flame retardant and a preparation method and application thereof.The method comprises the steps that phosphorus trichloride and epoxide serve as starting raw materials and react in the presence of a catalyst to generate trichloro alkyl phosphite, the obtained triester structure is dropwise added into phosphorous acid, heat preservation reaction is conducted, and dichloro alkyl phosphite is obtained; and adding a catalyst 2 into the diester product, heating, slowly adding paraformaldehyde, and continuously reacting to obtain the hydroxymethyl phosphate flame retardant. The method is low in cost, mild in reaction condition, solvent-free, capable of being efficiently completed without extreme conditions, high in reaction speed and high in conversion efficiency, is compatible with existing chemical production equipment, and provides a solid foundation for large-scale industrial production.

The application belongs to the technical field of photocatalytic CO2 cycloaddition reaction, and particularly relates to a preparation method of a vacancy defect layered bismuth semiconductor material and application of the vacancy defect layered bismuth semiconductor material in photocatalytic CO2 cycloaddition reaction. The material is based on a bismuth semiconductor material with a Sillen-Aurivillius structure, and a defect site is constructed by vacancy regulation of the material. Low-valence metal ions exposed by the vacancy defect can be used as Lewis acid sites to adsorb and activate epoxides, and the defect site can promote separation of photo-generated carriers, thereby enhancing surface reaction kinetics and effectively improving photocatalytic activity of the material, and finally promoting photocatalytic CO2 cycloaddition reaction performance.

The invention discloses a zinc dicarboxylate catalyst as well as a preparation method and application thereof, and belongs to the technical field of catalyst synthesis. The zinc dicarboxylate catalyst provided by the invention is prepared according to the following method: further reacting an intermediate obtained by reacting dicarboxylic acid with alkali metal hydroxide with zinc salt at constant temperature and low temperature, mixing the obtained mixture with ethanol, filtering, and washing a filter cake to obtain the high-activity zinc dicarboxylate catalyst. The zinc dicarboxylate catalyst with a more regular crystal form is obtained by accurately controlling the temperature and the pH value of a reaction mixture, the catalyst is a large-crystal-cluster rectangular flaky crystal, and the crystal cluster length of the catalyst is obviously larger than that of an existing zinc dicarboxylate catalyst. Meanwhile, the crystal thickness is obviously lower than that of the existing dicarboxylic acid catalyst. The zinc dicarboxylate catalyst disclosed by the invention shows very high catalytic activity in the process of catalyzing a CO2-epoxide copolymerization reaction.

The invention discloses a synthesis method of olefin epoxide and a used catalyst. According to the synthesis method, a complex of a Schiff base ligand and metal ions is adopted as a catalyst, and the structural formula of the Schiff base ligand is shown in the specification. According to the synthesis method, a solvent is not needed, the catalyst dosage is small, the reaction condition is mild, and meanwhile the olefin conversion rate and the target product selectivity are remarkably improved.

The application discloses a kind of high-efficiency heterogeneous catalyst for CO2 ring addition preparation cyclic carbonate and its preparation method and application, belong to catalyst technical field.The high-efficiency heterogeneous catalyst is transition metal doped polyoxometalate coordination polymer, chemical general formula is C 16 H 58 M2N2Na2O 48 V 10 Wherein, M is selected from Co 2+ , Ni 2+ , Cu 2+ Or Zn 2+ Its preparation method is: sodium vanadate, transition metal acetate and bis (2-hydroxyethyl) amino (trihydroxymethyl) methane ligand are dissolved in water with pH being 1~3, stirring reaction, after filtration, crystallization is stationary, and is obtained.In the ring addition reaction of CO2 and epoxide, the catalyst and cocatalyst tetrabutylammonium bromide synergistic effect, catalytic yield can be up to 98.2%, selectivity is more than 99%, and catalytic activity still remains at 88% after recycling five times.

A titanium-containing silicon oxide capable of producing an epoxide in a high yield when used as a catalyst in a reaction for producing an epoxide from an olefin and a hydroperoxide, in which the titanium-containing silicon oxide satisfies all conditions 1 to 5: Condition 1: an average pore diameter is 10 or more; condition 2: 80% or more of the total pore volume has a pore diameter of 5-200; condition 3: the total pore volume is 0.2 cm3 / g or more; condition 4: the D50 of the titanium-containing silicon oxide is from 1.00 mm to 3.30 mm. And Condition 5: the (D90-D10) / D50 of the titanium-containing silicon oxide is 0.35-1.00.

The invention relates to the technical field of adhesives, in particular to bio-based polycarbonate with a light cross-linked structure, a preparation method of the bio-based polycarbonate, a pressure-sensitive adhesive and a preparation method of the pressure-sensitive adhesive. According to the bio-based polycarbonate with the light cross-linked structure, the carbon dioxide and the bio-based epoxide are adopted as raw materials, the cross-linking degree is small, and the polymer has the biodegradability and meets the requirement of sustainable development. The bio-based polycarbonate with the light cross-linked structure can be directly used as a pressure-sensitive adhesive without additional tackifiers, plasticizers and other auxiliaries. The pressure-sensitive adhesive provided by the invention has adjustable initial adhesion, permanent adhesion and peel strength, and shows performance comparable to that of a commercial pressure-sensitive adhesive. Meanwhile, the preparation method provided by the invention is simple in process, mild in condition and easy to control, and has a wide market prospect.

The application discloses a catalyst for synthesizing a cyclic carbonate compound by carbon fixation of an epoxide and a preparation method thereof, and belongs to the technical field of green catalytic synthesis.The catalyst has low preparation cost, and raw materials are easy to obtain; the catalyst has no corrosiveness to general aluminum product metal containers, and is beneficial to industrial production.Through the catalyst system, carbon dioxide and an epoxide can be synthesized into a cyclic carbonate compound under relatively mild conditions.Meanwhile, the catalyst does not contain metal and halogen, and has great commercial value in fields such as biological medicines which have strict metal toxin residue limitation.

A photo-alignment film, an optical film, a circularly polarizing plate, an image display apparatus, and a method for manufacturing a circularly polarizing plate, which can improve liquid crystal alignment properties and rub resistance. The photo-alignment film is obtained by curing a composition which contains a photo-alignment polymer having a photo-aligned group and an epoxy compound, in which the photo-alignment film contains a fluorine atom, and a content of the photo-alignment polymer is 1% to 15% by mass with respect to a total solid content of the composition.

The application discloses a catalyst for preparing beta-lactone by epoxide carbonylation and a preparation method and application thereof. The catalyst is composed of a homogeneous metal complex and a heterogeneous supported cobalt catalyst. The homogeneous metal complex is one of a porphyrin metal complex and a Schiff base metal complex. The heterogeneous supported cobalt catalyst is composed of a metal center and an organic phosphine ligand polymer connected with the metal center through a coordination bond. The metal center is cobalt, and the organic phosphine ligand polymer is a cross-linked polymer containing a repeating phosphine ligand unit. The metal center is connected with P atoms in the organic phosphine ligand polymer through a coordination bond. The cobalt center forms a stable coordination structure through a ligand, and the coordination layer of cobalt satisfies an electronic saturation state. The cobalt catalyst has high stability, is suitable for a fixed bed or a slurry bed reactor, is favorable for realizing continuous and stable operation of an epoxide carbonylation reaction, and has good industrial amplification potential.

The present invention relates to a process for preparing one or more ethers, the process comprising (i) preparing a feed stream comprising an alcohol, an epoxide, and a catalyst; (ii) feeding the feed stream prepared in (i) into a reactor, and subjecting the feed stream to reaction conditions, obtaining a product stream comprising the one or more ethers; (iii) feeding the product stream obtained from (ii) into a first fractionating column, and separating the product stream into a first overhead stream and a first bottoms stream; (iv) preparing a first H2O-containing stream; (v) transferring heat from the first overhead stream obtained from (iii) to the first H2O-containing stream prepared in (iv), obtaining a heated first H2O-containing stream and a liquid first over-head stream. It has been surprisingly found that by integrating an open loop heat pump in the process for preparing one or more ethers, a portion of the heat can be recovered by heat transfer to an H2O-containing stream.

The present patent application concerns a synthesis method of cedrene cis-diol of formula I comprising the following steps: a) providing α-cedrene of formula II and carrying out the regioselective and stereospecific reaction of α-cedrene of formula II to give cedrene epoxide of formula III, b) carrying out the stereospecific isomerization reaction of cedrene epoxide of formula III to give cedranone of formula IV, c) carrying out the regioselective and stereospecific hydroxylation reaction of cedranone of formula IV to give hydroxycedranone of formula V, d) carrying out the stereoselective reduction reaction of hydroxy cedranone of formula V to give cedrene cis-diol of formula I, characterized in that: in stage a) of the stereospecific epoxidation reaction, the reaction is carried out using a lipase enzyme and hydrogen peroxide, and the reaction temperature is comprised between 20 °C and 35 °C, and the cedrene epoxide of formula III is used as is, i.e. without the need for purification, in the next stereospecific isomerization step b); in stage b) of stereospecific isomerization reaction, the reaction is carried out using a Brönsted acid, and the reaction temperature is comprised between 20 °C and 85 °C, and cedranone of formula IV is purified by distillation; in stage c) of regioselective and stereospecific hydroxylation reaction, the reaction is carried out in the presence of a strong base, and the reaction temperature is comprised between 20 °C and 30 °C, and the hydroxycedranone of formula V is purified by crystallization; in stage d) of stereoselective reduction reaction, the reaction involves the following two sub-steps: dl) adding a Lewis acid, followed by d2) adding a reducing agent, and the reaction temperature is comprised between -5 and 0 °C, and the cedrene cis-diol of formula I is purified by crystallization; in each of the aforementioned steps a)-d) the compounds of formula III, IV, V and I are obtained respectively in a diastereomeric mixture with a diastereoisomeric ratio > 99:1.

A synthesis method for a chiral epoxide catalyzed by styrene monooxygenase. The synthesis method comprises: carrying out an enzyme catalysis reaction on a raw material system comprising oxidase, an olefin compound, reductase, dehydrogenase, a hydrogen donor, FAD, and NAD+ so as to obtain a chiral epoxide. R2 and R3 are each independently selected from substituents such as H, substituted or unsubstituted C1-C6 alkyl, substituted or unsubstituted C1-C6 heteroalkyl, and a substituted or unsubstituted C2-C6 ester group; and R1 is selected from substituents such as halogen, hydroxy, carboxyl, acetoxy, and substituted or unsubstituted C1-C6 alkyl. The raw material system is used for carrying out the enzyme catalysis reaction, and the oxidase in the raw material system is used so as to obtain the chiral epoxide. The synthesis method for the chiral epoxide catalyzed by the oxidase has the advantages of a short synthesis route, a wide range of substrate types, high selectivity, mild reaction conditions, less three wastes, and low costs.

The utility model belongs to chemical equipment technical field, specifically is a kind of cyclohexene class epoxide disulfuration preparation kettle, including reserve kettle, the upper surface of reserve kettle is connected with the shaft of flange plate movably, the upper surface of the top shaft of reserve kettle is connected with the stirring rod of penetration, the inner arc surface of reserve kettle is equipped with preparation cavity, and the inner arc surface of preparation cavity is sleeved with jar body heating wire;Through gas guiding valve and exhaust valve, inert gas enters dispersion assembly through gas delivery pipe, and in annular cavity piece, gas flows along guide groove spirally, this design can effectively prolong the residence time of gas in cavity, make it fully dispersed, subsequently, gas is sprayed out with even flow rate through dense gas distribution spray hole, and strong turbulent flow is formed in preparation cavity, this turbulent flow can rapidly agitate cavity air, make inert gas and air fully mix and extrude air, to realize efficient replacement, isolate air to prevent raw material oxidation or explosion risk, and guarantee production safety and stability.

This invention relates to the field of catalyst technology, disclosing a quaternary ammonium salt coordination bimetallic catalyst, its preparation method, and its applications. The preparation method of the quaternary ammonium salt coordination bimetallic catalyst includes reacting a solution containing a potassium polycyanometalate and a terminal hydroxyl-terminated quaternary ammonium salt ligand with a metal salt solution to obtain the quaternary ammonium salt coordination bimetallic catalyst. This invention uses a terminal hydroxyl-terminated quaternary ammonium salt as the ligand, directly preparing the quaternary ammonium salt coordination bimetallic catalyst while synthesizing the bimetallic catalyst. The preparation process of this invention is simple, and the obtained quaternary ammonium salt coordination bimetallic catalyst can be directly recycled after filtration. The quaternary ammonium salt coordination bimetallic catalyst obtained by this invention can be used to synthesize carbon dioxide-based cyclic carbonates, exhibiting high catalytic efficiency, high selectivity, and a certain degree of water tolerance. The conversion rate of epoxides can reach over 99%, and the selectivity can reach over 99%.

A process for producing a polyol block copolymer in a multiple reactor system including a first and second reactor in which a first reaction takes place in the first reactor and a second reaction takes place in the second reactor. The first reaction is the reaction of a carbonate catalyst with CO2 and epoxide, in the presence of starter and / or solvent to produce polycarbonate polyol copolymer and the second reaction is the reaction of DMC catalyst with the polycarbonate polyol compound of the first reaction and epoxide to produce polyol block copolymer. The product of the first reaction is fed into the second as crude reaction mixture, the epoxide and the polycarbonate polyol compound of the first reaction are fed in a continuous or semi-batch manner, and / or the product of the first reaction has neutral or alkaline pH on addition to the second. The invention further relates to the copolymers and products incorporating such copolymers.

The application belongs to the technical field of catalyst materials, and particularly relates to a sulfur and nitrogen co-doped carbon catalyst as well as a preparation method and application thereof. The sulfur and nitrogen co-doped carbon catalyst contains 0.18-4.4wt% of S and 0.08-7.0wt% of N. The preparation method of the sulfur and nitrogen co-doped carbon catalyst comprises the following steps: mixing a nitrogen-containing precursor, a sulfur-containing precursor and humin, and calcining to obtain the sulfur and nitrogen co-doped carbon catalyst. The sulfur and nitrogen co-doped carbon catalyst has Lewis acid-base double active centers by introducing sulfur and nitrogen into the carbon material, wherein S is an acid active center and N is an alkaline active center, and can fully activate epoxide and carbon dioxide, respectively, and has good catalytic performance and reusability.

An improved polyurea and chitosan core-shell delivery particles encapsulating a benefit agent is described. Chitosan is pre-modified with a modifying compound which is cationic, anionic, or nonionic. Alternatively the modification is accomplished in situ. The modifying compound is selected from the group consisting of an epoxide, aldehyde, or an α,β-unsaturated compound, and is reactive with free amine moieties of chitosan, covalently bonding through CN bonds with the amine moieties of the chitosan. The modifying compound can contain acidic, hydroxyl, and quaternary ammonium groups. The reaction product of the chitosan, the modifying compound along with an electrophile, preferably a polyisocyanate yields a microcapsule with charge, improved release characteristics, improved compatibility or enhanced degradation characteristics, such as in OECD test method 301B.