122 results about "Organoboron compounds" patented technology

The invention relates to a catalyst component used for ethylene polymerization reaction and a catalyst thereof. The catalyst component contains magnesium composite, titanium compound, organic alcoholic compound and boron compound. The organic boron compound is selected from at least one of structural formula 1, structural formula 2 and structural formula 3. The catalyst of the invention is quite applicable for a slurry polymerization process of ethylene, and the catalyst has better hydrogen regulation sensitivity and higher catalytic activity.

The invention provides three-coordinated organoboron compounds that are useful for photoluminescence and electroluminescence. Compounds of the invention include light emitters, preferably emitting intense blue light, electron transporters, hole transporters and hole injectors. A particularly preferred such compound is p-(1-naphthylphenylamino)-4,4′-biphenyldimesitylborane (BNPB), which demonstrates all of these properties. The invention further provides methods of synthesizing such three-coordinated boron compounds, methods of producing photoluminescence and electroluminescence, methods for charge transports, methods for hole injection, methods of applying the compounds in thin films, and uses of the compounds of the invention in luminescent probes, and electroluminescent displays.

The invention discloses an electrolyte of a lithium-ion secondary battery, which adopts fluoro-carbonate, high molecular weight chain carbonate and N, N-dimethyl trifluoro ethyl amide as cosolvent, and an organboron compound as an enhanced conductivity additive, and also contains film forming additive vinylene carbonate, 1,3-propyl sultone and a non-aqueous organic solvent in which lithium salt is dissolved. The battery assembled by using the electrolyte has good charging performance and discharging performance at low temperature, and the flame retardant property of the electrolyte is remarkably improved as the fluoro-carbonate is added.

The invention relates to a process for forming a polyalphaolefin, the process comprising the step of polymerizing at least one C₈-C₁₂ monomer, preferably a decene such as 1-decene, in the presence of an aluminoxane, an activator and a metallocene to form the polyalphaolefin, wherein the molar ratio of the aluminoxane to the metallocene is less than 250:1. The invention also relates to a process for forming a polyalphaolefin having a desired kinematic viscosity from at least one monomer in the presence of an aluminoxane, an organoboron compound and a metallocene. The process comprises the steps of, inter alia, providing a correlation between (i) the molar ratio of the aluminoxane to at least one of the organoboron compound and the metallocene, and (ii) the kinematic viscosity of the polyalphaolefin to form polyalphaolefins having predictable viscosities.

The invention discloses a room-temperature-curing acrylic heteropolysiloxane nano-ceramic protection coating and a preparation method thereof, and belongs to the coating field. The preparation method comprises the followings steps: uniformly mixing 5-20 parts by weight of acrylic organosilicon wax, 1-10 parts by weight of a bifunctional organoboron compound and parts of an alcoholic dilutent, adding the obtained mixture to 100 parts of a nanometer silica sol system having a concentration of 10-40wt%, adding 100-200 parts by weight of methyltrimethoxy silane or its oligomer, 0.5-5 parts by weight of a silane coupling agent, residual parts of the alcoholic diluent and 0-50 parts by weight of a methyl MQ silicone resin mixed solution under stirring, and continuously stirring at room temperature for 1-2h to prepare a nano-ceramic protection coating; and the coating is coated on the surface of a substrate, and the formed coat is naturally dried to form a high-hardness high temperature resistant ceramic protection coat. The completely cured coat has a hardness reaching above 6H, can resistant a high temperature of 400DEG C, and has excellent water and stain resistances.

The invention relates to an efficient olefin polymerization catalyst and a preparation method and application thereof, belonging to the field of olefin polymerization. A main catalyst of the olefin polymerization catalyst is made from a magnesium halide support, a transition metal halide, monohydric alcohol with less than 5 carbon atoms, alcohol with more than 5 carbon atoms, an organosilicon compound, an organophosphorus compound and an organoboron compound, wherein the mole ratio of magnesium halide to the transition metal halide to monohydric alcohol with less than 5 carbon atoms to alcohol with more than 5 carbon atoms to the organosilicon compound to the organophosphorus compound to the organoboron compound is 1: (1-40): (0.01-5): (0.01-10): (0.01-10): (0.01-5): (0.01-5); a cocatalyst of the olefin polymerization catalyst is an organoaluminum compound. Particles of the catalyst disclosed by the invention are good in morphology, are spherical and are not adhered to the wall of a container; the catalyst is high in activity and good in hydrogen regulation performance, the melt index MFR (Melt Flow Rate) of polyethylene is adjustable in the range of 0.1g/10min to 600g/10min, and the bulk density of polyethylene particles is high, so that the catalyst is applicable to slurry-method polymerization, loop-tube polymerization, gas-phase method polymerization or combined polymerization processes.

A supported olefin polymerization catalyst system and a method of making it are disclosed. The catalyst system comprises: (a) a support chemically treated with an organoaluminum, organosilicon, organomagnesium, or organoboron compound; (b) a single-site catalyst that contains a polymerization-stable, heteroatomic ligand; and (c) an activator. Chemical treatment is a key to making supported heterometallocenes that have high activity and long shelf-lives, and can effectively incorporate comonomers.

The invention pertains to a ball-shaped solid titanium complex catalyst used for vinyl polymerization or copolymerization. The catalyst is prepared by the following method: (1) homogeneous magnesium solution is prepared by dissolving magnesium halide into alcoholic compound; (2) at least one organoboron compound without inactive hydrogen is added into the homogeneous magnesium solution; (3) the ball-shaped solid titanium complex catalyst is prepared by reaction of the said magnesium combination solution and titanium compound through recrystallization. The ball-shaped solid titanium complex catalyst demonstrates high catalytic activity of solid titanium complex catalyst used for vinyl polymerization or copolymerization, can be used for polymerization and copolymerization of ethylene to produce polymers with high bulk density, narrow particle size distribution and low fines content.

The invention relates to methods of preparing an organic boron compound and a beta-carbonyl compound by catalyzing copper ion loaded chitosan microspheres. The preparation method of the organic boroncompound mainly comprises the following steps of A, adding copper ion loaded chitosan microspheres, tetrahydrofuran and water into a reaction vessel, and fully stirring to obtain a mixed solution under room temperature; B, adding an alpha,beta-unsaturated carbonyl compound and a bis(pinacolato)diboron reagent into the mixed solution; C, stirring at room temperature so as to react fully; and D, after the reaction is finished, separating and purifying to obtain the organic boron compound. The preparation method of the beta-carbonyl compound comprises the steps A, B and C of the above method, andalso comprises steps of directly filtering, then washing with tetrahydrofuran and mixing a washing liquid with a filtrate, adding sodium perborate tetrahydrate into the filtrate, stirring at room temperature so as to react fully, separating and purifying to obtain the beta-carbonyl compound. The methods have the beneficial effects that the copper ion loaded chitosan microspheres are used as a catalyst to prepare the organic boron compound for the first time, no extra ligand is added, and the methods have high catalysis efficiency, high stability, and is non-toxic and environmentally friendly.

Solid fine particles which contain a magnesium atom, an aluminum atom and a C_1-20 alkoxy group simultaneously, are insoluble in a hydrocarbon solvent, and have an average particle diameter of 3 to 80 μm, and an olefin polymerization catalyst containing the solid fine particles and a transition metal compound in the groups 3 to 11 in the periodic table, exhibit a very high olefin polymerization activity without combination with an expensive organoaluminum oxy compound or organoboron compound and maintains a high activity in polymerization for a long time, and an olefin polymer excellent in powdery properties can be produced by using the olefin polymerization catalyst. The transition metal compound in the groups 3 to 11 in the periodic table includes a transition metal compound having a ligand containing two or more atoms selected from a boron atom, a nitrogen atom, an oxygen atom, a phosphorus atom and a sulfur atom.

Provided are: a method for rapid fluoromethylation, by which a fluoromethyl group can be easily bonded to an aromatic-ring carbon of an aromatic compound with little generation of by-products; and a process for preparation of a PET tracer using the same. The method is characterized by cross-coupling an organoboron compound in which an aromatic ring is bonded to a boron atom with FCX₂Br (wherein X is ordinary hydrogen or heavy hydrogen) in a solvent obtained by adding water to an aprotic polar solvent, in the presence of a palladium complex, a phosphine ligand, and a base.

The invention discloses a catalysis system for preparing a copolymer of ethylene and/or alpha-olefin and cycloolefin. The catalysis system comprises a main catalyst and cocatalysts. The main catalystis a metallocene compound. The cocatalysts comprise an organoboron compound and alkyl aluminum. The invention also discloses a method for preparing the copolymer of ethylene and/or alpha-olefin and cycloolefin through the catalysis system. The method comprises that an inert organic solvent, ethylene and/or alpha-olefin and cycloolefin are sequentially added in a reactor at a temperature of 40 to 100 DEG C under pressure of 1 to 30 bar, after the ethylene and/or alpha-olefin is dissolved in the inert organic solvent until saturation, a triisobutyl aluminum solution, a metallocene catalyst solution and an organoboron compound solution are orderly added into the solution and the mixed solution undergoes a reaction. Compared with MAO, MMAO, and dMAO, the cocatalysts can efficiently polymerizethe cycloolefin copolymer, the metal content of the polymerization product is reduced and the post-treatment cost is greatly reduced.

A process for producing a stabilized polyacetal resin which comprises heating a polyacetal resin having unstable terminal groups in the presence of a treating agent for unstable-terminal-group decomposition selected from the following groups (I), (II), and (III) to thereby diminish the unstable terminal groups. Treating agents for unstable-terminal-group decomposition in group (I) Group (I): quaternary ammonium salts of acid cyclic amide compounds Treating agents for unstable-terminal-group decomposition in group (II) Group (II): quaternary ammonium salts of polycarboxylic acids having four or more carboxy groups per molecule and/or quaternary ammonium salts of aminocarboxylic acids having one or more carboxy groups per molecule Treating agents for unstable-terminal-group decomposition in group (III) Group (III): quaternary ammonium salts in which the counter anions are ones derived from at least one compound selected from the group consisting of the following (i) to (v): (i) carbonic acid monoesters and/or metal hydrogen carbonates; (ii) acid enol compounds; (iii) phenolic compounds and alcoholic compounds; (iv) acid azole compounds; and (v) at least one noncarboxylic acid compound selected from the group consisting of organosulfur compounds, organophosphorus compounds, and organoboron compounds.

The invention discloses a method for preparing boron modified phenolic resin. A three-step method is adopted, and the three-step method comprises the following steps: firstly, reacting an organic boron compound with aldehyde under an alkaline condition to generate hydroxymethylated organic boron, then pre-polymerizing the hydroxymethylated organic boron with phenol under an acidic condition to form a short chain pre-polymer, and finally copolymerizing the short chain pre-polymer with aldehyde under the acidic condition to form branched boron modified phenolic resin with a high boron content. By adopting the method disclosed by the invention, the reaction activity of the boron compound is improved, the boron content in a molecular chain segment of the phenolic resin is improved, high molecular weight phenolic resin with a branch chain structure can be prepared, and the prepared boron modified phenolic resin is high in boron content and is excellent in heat resistance.

The invention relates to the field of olefin polymerization, in particular to a polyolefin elastomer and a preparation method thereof. The molecular weight of the polyolefin elastomer is distributed as a bimodal structure, and the preparation method includes the following steps that in an organic solvent, in the presence of a catalyst and hydrogen, the polymerization reaction of ethylene, [alpha]olefin and optional cycloolefin is conducted; the catalyst contains a main catalyst and an activator, and the activator includes one or more optional compounds containing organic boron; and the main catalyst is one or more pre-transition metal compounds or crystals thereof shown in a formula (1). According to the polyolefin elastomer and the preparation method thereof, the pre-transition metal compounds or the crystals thereof are adopted to be the main catalyst for polymerization, and the polyolefin elastomer with obvious bimodal distribution is prepared by using a catalyst system in a singlereactor.

The invention relates to the field of catalysts, and discloses a non-metallocene compound and an ethylene-styrene copolymer, a preparation method of the non-metallocene compound and the ethylene-styrene copolymer, a catalyst composition for olefin polymerization and an application of the catalyst composition. The non-metallocene compound has the structure shown in a formula (I). The catalyst composition for olefin polymerization provided by the invention comprises a main catalyst and a cocatalyst, wherein the main catalyst is the non-metallocene compound provided by the invention, and the co-catalyst contains an aluminum-containing compound and an optional organic boron compound. The catalyst composition for olefin polymerization provided by the invention has the advantage of high catalytic activity. The catalyst composition provided by the invention can be used to catalyze the olefin polymerization of an ethylene monomer and a vinyl aromatic monomer, so that the single ethylene-styrene copolymer with relatively high content of ethylene structure units and can be obtained, and therefore, the toughness of the obtained copolymer is obviously better than the toughness of polymers in the prior art.

The present invention is a polymerization initiator paste composition which comprises (A) an organoboron compound which is liquid at 25 DEG C and (B) particles having an average particle diameter of 0.001 to 50 mu m and inert to the organoboron compound (A), in an amount of 4 to 400 parts by weight based on 100 parts by weight of the organoboron compound (A), and has a consistency, as measured at 25 DEG C under a load of 300 g in accordance with a method defined in ISO4823, of 15 to 100 mm. This composition constitutes a dental kit or the like together with a polymerizable monomer separately packaged. According to the present invention, an organoboron compound can be used safely, and because the composition is a paste, it is very easily utilized.

The invention relates to a non-bridge mono/bi-nuclear metallocene compound and a relative application olefin polymerization catalyst technical field. The compound contains 1-(4-methyl)-phenyl-2, 3, 4, 5-tetramethyl cyclopentadienyl-(2, 4, 6-tertiary butyl phenoxy)-titanium chloride, and (3, 3', 5, 5'-quattuor isopropyl-4, 4'-biphenyl oxygen)-bi-[1-(4-methyl)-phenyl-2, 3, 4, 5-tetramethyl cyclopentadienyl-titanium dichloride] or the like. The metallocene compound can be used as main catalyst, while alkyl aluminum is used as promoter, or organic boron compound and alkyl aluminum are assembled into a promoter system, to catalyze and synthesize high-molecular-weight atactic polypropylene with improved catalysis activity and polymer molecular weight, which can catalyze the polymerization of vinyl and alpha-olefin, to obtain the polymer with suitable molecular weight in narrow distribution and high co-monomer content.

The composition for hard tissue repair of the present invention is characterized by comprising 5 to 98.95 parts by weight of a monomer (A), 1 to 75 parts by weight of a (meth)acrylate polymer (B) and 0.05 to 20 parts by weight of a polymerization initiator composition (C) containing an organoboron compound (c1), with the proviso that the total amount of the components (A), (B) and (C) is 100 parts by weight. The composition undergoes small-scale heat generation during curing and can ensure a sufficient working time.

The invention relates to a preparation method of lignin and boron dual-modified phenolic resin and phenolic moulding plastic. The preparation method of the phenolic resin includes: adding lignin, an acidic catalyst and phenol into a reaction kettle, performing heating to boiling, and carrying out reflux reaction for 1-5h; adding an organic boron compound and aldehyde into the reaction solution, carrying out reaction at 90-110DEG C for 1-5h, and then performing dehydration to obtain the lignin and boron dual-modified phenolic resin. The preparation method of the phenolic molding plastic comprises the steps of: mixing the lignin and boron dual-modified phenolic resin with other raw materials evenly, and then carrying out plastication, tabletting, cooling and crushing to obtain the phenolic moulding plastic. The lignin and boron dual-modified phenolic resin and the phenolic moulding plastic prepared by the method provided by the invention have more excellent mechanical properties, better heat resistance and flame retardant performance, and better dimensional stability and electrical insulation properties.