Process for producing polyether polyol and a product
AssigneeAsahi Kasei Kogyo Kabushiki Kaisha
InventorsAtsushi Aoshima, Shoichiro Tonomura, Hiroyuki Fukui, Hisaya Imai
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Abstract
A process for producing a polyether polyol with a content of 0.5 to 99.5% by weight of oxytetramethylene groups derived from tetrahydrofuran by copolymerizing tetrahydrofuran or a mixture of tetrahydrofuran and other cyclic ether copolymerizable therewith with a polyhydric alcohol having two or more hydroxyl groups per one molecule with the use of a heteropoly-acid and/or its salt as a catalyst, which comprises allowing 0.1 to 15 molecules of water per one heteropoly-anion to exist in the catalyst phase. The above-described polyether polyol is an industrially useful polymer which is a starting material for polyurethane to be used for spandex or a synthetic leather, etc.
Claims7
A polyether glycol comprising the constituent unit represented by the formula (I) shown below copolymerized randomly with the constituent unit (IV) shown below, with a molar ratio of the unit (I) to the unit (IV) being 99:1 to 5:1, having an average molecular weight of 500 to 10,000, with the molecule being terminated at both ends with hydroxyl groups:
- ##STR15## wherein R.sub.1 and R.sub.2 are selected from the group consisting of --(CH.sub.2).sub.n -- (wherein n is an integer of 2 to 4), --CH(CH.sub.3)CH.sub.2 -- and --CH.sub.2 CH.sub.2 --O--CH.sub.2 --CH.sub.2 --, and R.sub.3 is selected from the group consisting of a hydrogen atom, alkyl groups having 1 to 4 carbon atoms and --(CH.sub.2).sub.2 --OH.
A process for producing a nitrogen containing polyether polyol which comprises copolymerizing tetrahydrofuran with a polyhydric alcohol having the structural formula ##STR16## wherein R.sub.1 and R.sub.2 are selected from the group consisting of --(CH.sub.2).sub.n -- (wherein n is an integer of 2 to 4), --CH(CH.sub.3)CH.sub.2 -- and --CH.sub.2 CH.sub.2 --O--CH.sub.2 --CH.sub.2 --, and R.sub.3 is selected from the group consisting of a hydrogen atom, alkyl groups having 1 to 4 carbon atoms, and --(CH.sub.2).sub.2 --OH,
- with the use of a heteropoly-acid and/or its salt as a catalyst, the amount of said polyhydric alcohol being less than 4-fold moles of the heteropoly-anion, and allowing 0.1 to 15 molecules of water per one heteropoly-anion to exist in the catalyst phase.
A process for producing a sulfur containing polyether polyol which comprises copolymerizing tetrahydrofuran with a polyhydroxyalkyl sulfide having the structural formula
- HO--R.sub.1 --S--R.sub.2 --OH
- wherein R.sub.1 and R.sub.2 are selected from the group consisting of --(CH.sub.2).sub.n -- (wherein n is an integer of 2 to 4), --CH(CH.sub.3)CH.sub.2 -- and --CH.sub.2 CH.sub.2 --O--CH.sub.2 CH.sub.2 -- and --CH.sub.2 CH.sub.2 --S--CH.sub.2 CH.sub.2 --,
- with the use of a heteropoly-acid and/or its salt as a catalyst, the amount of said polyhydroxyalkyl sulfide being less than 4-fold moles of the heteropoly-anion, and allowing 0.1 to 15 molecules of water per one heteropoly-anion to exist in the catalyst phase.
Dependencies are inferred from the claim text.