- Method for preparing methyl octabromo-ether flame retardant
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The invention discloses a method for preparing a methyl octabromo-ether flame retardant. The method comprises the following steps: enabling bisphenol A and an etherifying agent to have etherification reaction so as to generate a bisphenol A diallyl ether
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Paragraph 0040; 0041
(2016/11/17)
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- Bromine-containing organic compounds, bromine-containing organic compound-containing composition and method of manufacturing the same
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PROBLEM TO BE SOLVED: To provide a bromine-containing organic compound which imparts high flame retardancy and thermal stability to a resin when it is compounded with the resin. SOLUTION: The bromine-containing organic compound is represented by formula (1), a flame retardant contains the bromine-containing organic compound, and a flame retardant resin composition contains the flame retardant and a resin. In formula, A represents one of -CH2-, -C(CH3)2-, and -S-, each of R1and R2represents a hydrogen atom or a 1-6C saturated hydrocarbon group, R3represents a 1-6C saturated hydrocarbon group, Y represents a halogen atom, and each of m and n represents an integer of 1-4. COPYRIGHT: (C)2013,JPOandINPIT
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Paragraph 0042-0056
(2020/11/05)
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- Method for purifying a bromine compound
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A method for purifying a bromine compound by depositing the bromine compound represented by the following general formula (1) as solid particles from a crude solution containing the bromine compound: wherein(i) the crude solution is supplied into the slurry containing the particles of the bromine compound;(ii) the concentration of the particles of the bromine compound in the slurry is maintained at a predetermined range;(iii) the solvent contained in the slurry is a mixed solvent of a good solvent and a poor solvent and the ratio of the good solvent to the poor solvent is maintained at a predetermined value; and(iv) the solid particles of the bromine compound are separated from the slurry.
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- Bromine compound production method
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Method of producing a bromine compound having an aliphatic unsaturated bond which includes reacting a compound having an aliphatic unsaturated bond represented by the following general formula (1) with bromine: to produce a bromine compound represented by the following formula (2): wherein Ar1, Ar2 and Y are the same as defined in the above general formula (1) , and R3 and R4 are groups obtained by saturating the unsaturated groups of R1 and R2 in the above general formula (1) with bromine, respectively. The reaction is carried out in the presence of a solvent which is inactive in the reaction, and a substantial amount of the heat of reaction is removed from a reaction system by the vaporization of the solvent or bromine. A high-purity bromine compound in high yield which is useful as flame retardant, can be obtained.
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- Bromine compound production method
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A high-purity bromine compound which is useful as flame retardant, can be obtained industrially advantageously by a process comprising reacting bromine with an aliphatically unsaturated compound of formula (1) : R1-O-Ar1-Y-Ar2-O-R2to produce a bromine compound of formula (2): R3-O-Ar1-Y-Ar2-O-R4wherein in each formula Ar1and Ar2are independently a C5-16aromatic hydrocarbon or a C5-12saturated alicyclic hydrocarbon, and Y is a C1-6saturated hydrocarbon, a sulfone, sulfide, ketone or C2-6alkylene oxide or is a single bond; R1and R2are each independently a C2-11hydrocarbon group which is at least partially unsaturated; and R3and R4are groups obtained by saturating with a bromine atom the unsaturated groups of R1and R2respectively, wherein the reaction is carried out in the presence of a solvent which is inactive in the reaction, and a substantial amount (e.g. 80% or more) of reaction heat is removed from the reaction system by the vaporization heat of the solvent or bromine.
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