Process for producing lactone high polymers
AssigneeDaicel Chemical Industries, Ltd.
InventorsMasayoshi Kubo, Kimio Inoue
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Abstract
A process for producing resinous lactone high polymers by the catalytic polymerization of lactones having a water content of less than 0.1% in the presence of a catalyst selected from the group consisting of stannous chloride, stannous bromide, stannous iodide, titanium trichloride, titanium tetrachloride, ammonium molybdate, zirconium nitrate, zirconium oxychloride and zirconium carboxylates, as a catalyst.
Claims15
A process for preparing a rigid polymer having a number-average molecular weight of higher than 20,000, which comprises the steps of polymerizing a polymerizable lactone monomer having a water content of less than 0.1 percent by weight, in the presence of a catalytically effective amount of a catalyst selected from the group consisting of stannous chloride, stannous chloride dihydrate, stannous bromide, stannous iodide, titanium trichloride, titanium tetrachloride, ammonium molybdate, zirconium nitrate, zirconium oxychloride and zirconyl carboxylates, until said polymer is formed;
- and then recovering said polymer.
Dependencies are inferred from the claim text.