摘要:
A fluorine-containing urethane compound of the general formula: [Rf-A1-(X1(OH))—(Y1)a—OC(═O)NH—]mI[—NHC(═O)O—Y2]n[—NHC(═O)O—((ClCH2—)X2O)b—R1]k (1) wherein I is a group remaining after an isocyanate group is removed from a polyisocyanate compound, Rf is a perfluoroalkyl group having 2 to 21 carbon atoms, A1 is a direct bond or a divalent organic group having 1 to 21 carbon atoms, X1 and X2 are trivalent linear or branched aliphatic group having 2 to 5 carbon atoms, Y1 is a divalent organic group having 0 to 5 carbon atoms and 0 to 2 nitrogen atoms (provided that at least one carbon atom or nitrogen atom is present) and at least one hydrogen atom, Y2 is a monovalent organic group optionally having a hydroxyl group, and R1 is a hydrogen atom or an alkyl group having 1 to 10 carbon atoms, can impart high water- and oil-repellency.
摘要:
In a method for recovering a fluoroalcohol from a mixture comprising a fluoroalcohol and water, (i) a method for recovering a fluoroalcohol by distilling the mixture comprising the fluoroalcohol and water to separate water as an azeotropic or azeotrope-like composition; and (ii) a method for recovering a fluoroalcohol, wherein water is separated by pervaporation.
摘要:
The resin composition of the present invention comprises (a) a fluorine-free resin, (b) a fluorine-containing resin, and (c) a polyfluoroalkyl group-containing polymer, has excellent impact strength, and repels a flux.
摘要:
In a method for recovering a fluorine-containing solvent from the mixture comprising the fluorine-containing solvent and dyes, (i) a method for recovering a fluorine-containing solvent by distillation; and (ii) a method for recovering a fluorine-containing solvent comprising the steps of adding to the mixture the second solvent which uniformly mixes with the fluorine-containing solvent but does not dissolve the dyes; separating a precipitate from the resulting mixture; and separating the second solvent.
摘要:
A process for producing a fluoroalcohol of the following formula (1) H(CFR1CF2)nCH2OH (1) (n=1 or 2, wherein R1 represents F or CF3 when n=1; R1 represents F when n=2) comprising reacting methanol with tetrafluoroethylene or hexafluoropropylene in the presence of an initiator wherein the fluoroalcohol of formula (1) is distilled after decomposing the remaining initiator contained in the reaction mixture.
摘要:
A novel fluorinated hydrocarbon compound containing an oxygen or sulfur atom in its molecule, produced by the nucleophilic reaction of a fluorine compound with a hydrocarbon compound. This compound is useful as a lubricant for various applications and particularly excellent as an oil for refrigerators wherein hydrochlorofluorocarbon is used as the refrigerant and as a magnetic recording medium lubricant.
摘要:
Disclosed is a high density ethylene polymer comprising a homopolymer of ethylene, or a copolymer of ethylene with at least one comonomer selected from an .alpha.-olefin, a cyclic olefin, and linear, branched and cyclic dienes, and having the following properties: (a) a density d (g/cm.sup.3) of from 0.951 to 0.980; (b) an M.sub.I (g/10 minutes) of more than 3 and not more than 100 (M.sub.I is the melt flow rate as measured at 190.degree. C. under a load of 2.16 kg); (c) the polymer satisfying: log a.sub.kI .gtoreq.-0.844 log M.sub.I +1.462 [M.sub.I is as defined above, and a.sub.kI is the Izod impact strength (kgf.multidot.cm/cm.sup.2)]; (d) the polymer satisfying: log M.sub.IR .gtoreq.-0.094 log M.sub.I +1.520 [M.sub.I is as defined above, and M.sub.IR is the H.sub.MI /M.sub.I ratio in which H.sub.MI (g/10 minutes) is the melt flow rate as measured at 190.degree. C. under a load of 21.6 kg and M.sub.I is as defined above]; and wherein (e) the d (g/cm.sup.3) and the M.sub.I (g/10 minutes) satisfy: d.gtoreq.-0.00873 log M.sub.I +0.972. The ethylene polymer has excellent mechanical properties and excellent moldability, and can be advantageously produced by use of a catalyst comprising (A) a specific transition metal compound containing, as a ligand, an unsubstituted or substituted indenyl group, or di or tri substituted cyclopentadienyl group; (B) an inorganic solid component comprising a particulate inorganic solid having OH groups on a surface thereof and, carried thereon, an organoaluminumoxy compound having an alkyl group; and (C) an organoaluminum compound.
摘要:
A method for producing a fluorine-containing olefin represented by formula (I):Ch.sub.2 .dbd.CFR.sub.f (I)wherein R.sub.f represents a perfluoroalkyl group or a fluoroalkyl group comprising the step of contacting, at a high temperature, hydrogen gas with a 1,1-dihydro-2,2-difluoro alcohol represented by formula (II):HOCH.sub.2 CF.sub.2 R.sub.f (II)wherein R.sub.f represents a perfluoroalkyl group or a fluoroalkyl group.
摘要:
A method of accurately separating immunoglobulin monomers by subjecting an immunoglobulin solution containing at least immunoglobulin monomers and immunoglobulin aggregates to cross-flow filtration using an ultrafiltration membrane, an ultrafiltration membrane module, and a cross-flow filtration apparatus. The method can separate immunoglobulin monomers by subjecting an immunoglobulin solution containing at least immunoglobulin monomers and immunoglobulin aggregates and having an immunoglobulin concentration of 1 to 150 g/L to cross-flow filtration using an ultrafiltration membrane having a molecular weight cut-off of 100,000 or more and less than 500,000 so that immunoglobulin monomers passes through the ultrafiltration membrane with a permeability of 80% or more while achieving a fractionation performance in which the permeability ratio of immunoglobulin dimers to immunoglobulin monomers that pass through the ultrafiltration membrane is 0.20 or less.
摘要:
A method of accurately separating immunoglobulin monomers by subjecting an immunoglobulin solution containing at least immunoglobulin monomers and immunoglobulin aggregates to cross-flow filtration using an ultrafiltration membrane, an ultrafiltration membrane module, and a cross-flow filtration apparatus. The method can separate immunoglobulin monomers by subjecting an immunoglobulin solution containing at least immunoglobulin monomers and immunoglobulin aggregates and having an immunoglobulin concentration of 1 to 150 g/L to cross-flow filtration using an ultrafiltration membrane having a molecular weight cut-off of 100,000 or more and less than 500,000 so that immunoglobulin monomers passes through the ultrafiltration membrane with a permeability of 80% or more while achieving a fractionation performance in which the permeability ratio of immunoglobulin dimers to immunoglobulin monomers that pass through the ultrafiltration membrane is 0.20 or less.