EP0126471A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Process for producing polyetherglycol
Assignee: Asahi Kasei Corp
•
Filing: 1984-05-18
•
Granted: —
•
Expires: 2004-05-18
Abstract
Abstract A process for producing a polyoxythetramethylene gly- color a copolymerized polyetherglycol by polymerizing tetrahydrofuran or a mixture of tetrahydrofuran with other cyclic ethers copolymerizable therewith, which comprises using a heteropoly-acid as a catalyst and permitting 0.1 to 15 mol of water per mol of the heteropolyacid to be present in the catalyst phase. The above-described polymer and copolymer are industrially useful polymers which can be used as the primary starting materials for polyurethanes to be used for a spandex and a synthetic leather, solvents, pressured fluids, etc.
Inventors
- 👤 Atsushi Aoshima
- 👤 Shoichiro Tonomura
- 👤 Ryoichi Mitsui
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-29 23:19
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/02; C08G65/04; C08G65/06; C08G65/16; C08G65/20
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
38 words
A process for producing a polyoxytetramethylene glycol by polymerizing tetrahydrofuran, which comprises using a heteropoly-acid as a catalyst and permitting 0.1 to 15 mol of water per mol of the heteropoly-acid to be present in the catalyst phase.
Claim 2
Dependent Claim
38 words
A process for producing a polyoxytetramethylene glycol by polymerizing tetrahydrofuran, which comprises using a heteropoly-acid as a catalyst and permitting 0.1 to 15 mol of water per mol of the heteropoly-acid to be present in the catalyst phase.
Claim 3
Dependent Claim
24 words
A process according to Claim 1, wherein the molar ratio of water to the heteropoly-acid present in the catalyst phase is 1 to 8.
Claim 4
Dependent Claim
52 words
A process for producing a polyetherglycol comprising oxytetramethylene groups containing 0.5 to.99.swt. % of tetrahydrofuran by copolymerizing tetrahydrofuran with other cyclic ethers copolymerizable therewith, which comprises using a heteropoly-acid as a catalyst and permitting 0.1 to 15 mol of water per mol of the heteropoly-acid to be present in the catalyst phase.
Claim 5
Dependent Claim
52 words
A process for producing a polyetherglycol comprising oxytetramethylene groups containing 0.5 to.99.swt. % of tetrahydrofuran by copolymerizing tetrahydrofuran with other cyclic ethers copolymerizable therewith, which comprises using a heteropoly-acid as a catalyst and permitting 0.1 to 15 mol of water per mol of the heteropoly-acid to be present in the catalyst phase.
Claim 6
Dependent Claim
24 words
A process according to Claim 3, wherein the molar ratio of water to the heteropoly-acid present in the catalyst phase is 1 to 8.
Claim 7
Dependent Claim
34 words
A process according to Claim 1, wherein the polymerization is carried out with addition of an oligomer of polyoxytetramethylene glycol in place of a part of the starting monomer tetrahydrofuran to the polymerization system.
Claim 8
Dependent Claim
44 words
A process according to Claim 3, wherein the polymerization is carried out with addition of an oligomer of polyoxytetramethylene glycol or a copolymerized polyether glycol of tetrahydrofuran and another cyclic ether in place of a part of the starting monomer to the polymerization system.
Claim 9
Dependent Claim
47 words
A process according to any of Claims 1 to 6, wherein the catalyst or the catalyst phase is recovered from the polymerization system after the polymerization according to the method such as phase separation or filtration, and the catalyst recovered is used repeatedly in the polymerization reaction.
Claim 10
Dependent Claim
61 words
A process according to Claim 3, Claim 4 or Claim 6, wherein the cyclic ether copolymerizable with tetrahydrofuran is a 3-membered ether represented by the formula: wherein Ri - R«, which may be same or different, represent hydrogen atoms, alkyl groups having 1 to 10 carbon atoms, halogen atoms, halo-substituted alkyl groups having 1 to 10 carbon atoms or phenyl groups.
Claim 11
Dependent Claim
63 words
A process according to Claim 3, Claim 4 or Claim 6, wherein the cyclic ether copolymerizable with tetrahydrofuran is a 4-membered ether represented by the formula: wherein R 1 ' - R 6 ', which may be same or different, represent hydrogen atoms, alkyl groups having 1 to 10 carbon atoms, halogen atoms or halo-substituted alkyl groups having 1 to 10 carbon atoms.
Claim 12
Dependent Claim
78 words
A process according to Claim 3, Claim 4 or Claim 6, wherein the cyclic ether copolymerizable with tetrahydrofuran is a 5-membered ether represented by the formula: wherein R 1 " - R 8 ", which may be same or different, represent hydrogen atoms, alkyl groups having 1 to 10 carbon atoms, halogen atoms or halo-substituted alkyl groups having 1 to 10 carbon atoms, at least one of R i " - R a " being not hydrogen atom.
Claim 13
Dependent Claim
49 words
A process according to Claim 5 or Claim 6, wherein the oligomer has a number-average molecular weight of 100 to 800, its content in the starting material is not more than 10 wt. % and a polyetherglycol with a number-average molecular weight of not lower than 1000 is synthesized.
Claim 14
Dependent Claim
49 words
A process according to Claim 5 or Claim 6, wherein the oligomer has a number-average molecular weight of 100 to 2000, its content in the starting material is not more than 10 wt. % and a polyetherglycol with a number-average molecular weight of not lower than 3000 is synthesized.
Claim 15
Dependent Claim
37 words
A process according to any of Claims 1 to 6, wherein the heteropoly-acid has a structure in which at least one element selected from the group consisting of Mo, W and V is a condensation coordinated atom.
Claim 16
Dependent Claim
45 words
A process according to Claim 13, wherein the heteropoly-acid has one center atom selected from the group consisting of P, Si, As, Ge, B, Ti, Ce and Co, and the atomic ratio of the condensation coordinated atom to the center atom is 2.5 to 12.
Claim 17
Dependent Claim
61 words
A process according to Claim 14, wherein the heteropoly-acid is selected from the group consisting of 12-molybdophosphoric acid, 18-molybdo-2-phosphoric acid, 9-molybdophosphoric acid, 12-tungstophosphoric acid, 18- tungsto-2-phosphoric acid, 11-molybdo-l-vanadophosphoric acid, 12-molybdotungstophosphoric acid, 6-molybdo-6- tungstophosphoric acid, 12-molybdotungstovanadophosphoric acid, 12-tungstovanadophosphoric acid, 12-molybdosilicic acid, 12-tungstosilicic acid, 12-molybdotungstosilicic acid, 12-molybdotungstovanadosilicic acid, 12-tungstoboric acid, 12-molybdoboric acid, 12-molybdotungstoboric acid, 12-molybdovanadoboric acid, 12-molybdotungstovanadovoric acid, 12-tungstogermanic acid and 12-tungstoarsenic acid.
Claim 18
Dependent Claim
33 words
A process according to Claim 7, wherein the heteropoly-acid has a structure in which at least one element selected from the group consisting of Mo, W and V is a condensation coordinated atom.
Claim 19
Dependent Claim
45 words
A process according to Claim 16, wherein the heteropoly-acid has one center atom selected from the group consisting of P, Si, As, Ge, B, Ti, Ce and Co, and the atomic ratio of the condensation coordinated atom to the center atom is 2.5 to 12.
Claim 20
Dependent Claim
60 words
A process according to Claim 17, wherein the heteropoly-acid is selected from the group consisting of 12-molybdophosphoric acid, 18-molybdo-2-phosphoric acid, 9-molybdophosphoric acid, 12-tungstophosphoric acid, 18-tungsto-2-phosphoric acid, 11-molybdo-l-vanadophosphoric acid, 12-molybdotungstophosphoric acid, 6-molybdo-6-tungstophosphoric acid, 12-molybdotungstovanadophosphoric acid, 12-tungstovanadophosphoric acid, 12-molybdosilicic acid, 12-tungstosilicic acid, 12- molybdotungstosilicic acid, 12-molybdotungstovanadosilicic acid, 12-tungstoboric acid, 12-molybdoboric acid, 12-molybdotungstoboric acid, 12-molybdovanadoboric acid, 12-molybdotungstovanadovoric acid, 12-tungstogermanic acid and 12-tungstoarsenic acid.
Claim 21
Dependent Claim
23 words
A process according to Claim 15, wherein the polymerization is carried out in the temperature range of from -10 °C to 120 °C.
Claim 22
Dependent Claim
23 words
A process according to Claim 15, wherein the polymerization is carried out in the temperature range of from 30 °C to 80 °C.
Claim 23
Dependent Claim
26 words
A process according to claim 1 or claim 3; wherein the catalyst in an amount of 0.05 to 20 times the amount of tetrahydrofuran is used.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.