KR850006546A - Method for producing polyether polyol - Google Patents

Abstract

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Description

Method for producing polyether polyol

As this is a public information case, the full text was not included.

Figure 1 shows the 1 H-NMR spectrum of the copolymerized polyether glycol of ethylene glycol and THF described in Example 1 (measured at 400 MHz by a JEOL JNM-GX 400 NMR apparatus).

3 is a process diagram of a continuous polymerization apparatus that may be used to practice the present invention.

Claims (16)

From tetrahydrofuran by copolymerizing tetrahydrofuran with a polyhydric alcohol having two or more hydroxyl groups per molecule as a catalyst and using a heteropolyacid and / or a salt thereof having from 0.1 to 15 molecules of water per one heteropoly-anion on the catalyst Process for preparing a polyether polyol having a content of 0.5 to 99.5% by weight of the derived oxytetramethylene group. The method of claim 1 wherein the amount of water present in the catalyst is in the range of 1 to 8 molecules per one heteropoly-anion. Mixtures of tetrahydrofuran and other cyclic ethers copolymerizable therewith, with heteropoly-acids and / or salts thereof in which 0.1-15 molecules of water per one heteropoly-anion are present on the catalyst, and 2 per molecule A method for producing a polyether polyol containing 0.5 to 99.5% by weight of an oxytetramethylene group derived from tetrahydrofuran by copolymerizing with a polyhydric alcohol having the above hydroxyl group. 4. A process according to claim 3, wherein the amount of water present on the catalyst is from 1 to 5 molecules per one heteropoly-anion. The method according to any one of claims 1 to 4, wherein the polyhydric alcohol is a dihydric alcohol having 2 to 10 carbon atoms. The dihydric alcohol according to claim 5, wherein the dihydric alcohol is ethylene glycol, propylene glycol, 1,2-propanediol, 1,4-butanediol, 2-methyl-1,3-propanediol, 1,5-pentanediol, neopentylglycol , 2-methyl-1,4-butanediol, hexanediol, heptanediol and octanediol alone or a mixture of two or more thereof. The method according to claim 1 or 3, wherein the polyhydric alcohol has a moiety containing a secondary amine or a tertiary amine or a salt thereof in the molecule thereof. The method of claim 7, wherein the polyhydric alcohol having a moiety containing a secondary amine or a tertiary amine in the molecule has the following structure: Wherein R ₁ and R ₂ are — (CH ₂ ) _n —, where n: 2-10, —CH ₂ CH ₂ —O—CH ₂ CH ₂ — and —CH ₂ CH ₂ CH ₂ —O—CH _It is selected from ₂ CH ₂ CH _2- , R ₃ is selected from an alkyl group having a hydrogen atom and 1 to 10 carbon atoms. The process according to claim 1 or 3, wherein the polyhydric alcohol is polyhydroxyalkylsulfide. 10. The method of claim 9, wherein the polyhydroxyalkylsulfide has the following structure. HO-R ₁ -SR ₂ -OH Wherein R ₁ and R ₂ are — (CH ₂ ) _n —, where n: 2 to 10), —CH ₂ CH ₂ —O—CH ₂ CH ₂ — and —CH ₂ CH ₂ CH ₂ —O—CH ₂ CH ₂ is selected from CH _2- . The process according to claim 1, wherein the low molecular weight polymer of the polyetherpolyol obtained by copolymerizing tetrahydrofuran and polyhydric alcohol is used as at least part of the polyhydric alcohol. The low molecular weight polymer of the polyetherpolyol obtained by copolymerizing tetrahydrofuran, other cyclic ethers copolymerizable therewith and a polyhydric alcohol is used as at least part of the polyhydric alcohol, or tetrahydrofuran is copolymerizable therewith. The oligomeric cyclic ether obtained by copolymerizing other cyclic ether and polyhydric alcohol is used, at least as part of a cyclic ether. The method according to any one of claims 1 to 4, wherein the polymer forms a two-liquid phase of an organic phase starting material and a liquid catalyst, and the reaction is carried out in a two-liquid system in which the liquid catalyst is present in at least 10% by volume of the total liquid phase in the reactor. And then recovering the polyether glycol from the organic phase of the starting material. The process according to any one of claims 1 to 4, wherein the catalyst or catalyst-containing phase is recovered by separation and used repeatedly in the polymerization reaction. The method according to any one of claims 1 to 5, 7, 9, and 11 to 14, wherein at least one oxide selected from Mo, W and V and P, Si, As, Ge, B , A heteropoly-acid formed by condensation of an element selected from Ti, Ce and Co with an oxy-acid. The method of claim 15, wherein the heteropoly-acid is 12-molybbroic acid, 18-molybdo-2-phosphoric acid, 9-molybdophosphoric acid, 12- tungstophosphoric acid, 18- tungsto-2-phosphoric acid, 11-mol Libdo-1-banadophosphoric acid, 12-molybdo tungstophosphoric acid, 6-molybdo-6-tungstophosphoric acid, 12-molybdo tungstobanadophosphoric acid, 12-tungstobanadophosphoric acid, 12 Molybdate silicic acid, 12- tungstosilicate, 12-molybdo tungstosilicate, 12-molybdo tungsutobanado silicic acid, 12- tungstodispersion, 12-molybdoboric acid, 12-molybdo Tungstobongic acid, 12-molybdovanadoboric acid, 12-molybdo tungstobanadoboric acid, 12- tungstogermanic acid and 12- tungstobisic acid alone or a mixture of two or more compounds selected from them. Characterized in that the method. ※ Note: The disclosure is based on the initial application.