C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
260/634.3, 260/6
C07C 43/13 (2006.01) C08G 65/06 (2006.01) C08G 65/20 (2006.01)
Patent
CA 1216597
ABSTRACT A process for producing a polyoxytetramethylene glycol or 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 per- mitting 0.1 to 15 mol of water per mol of the heteropoly- acid 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.
454059
Aoshima Atsushi
Mitsui Ryoichi
Tonomura Shoichiro
Asahi Kasei Kogyo Kabushiki Kaisha
Macrae & Co.
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