Acetoacetyl group-containing polyvinyl alcohol resin powder composition, and production method therefor
AssigneeThe Nippon Synthetic Chemical Industry Co., Ltd.
InventorYoshihito YAMAUCHI
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Abstract
Acetoacetyl group-containing polyvinyl alcohol resin powder composition containing a C1 to C3 alcohol in an amount of 0.5 to 4 wt % is produced by allowing a powdery polyvinyl alcohol resin to react with diketene, washing the resulting acetoacetyl group-containing polyvinyl alcohol resin particles with the C1 to C3 alcohol to remove an unreacted portion of the diketene, and drying the intermediate acetoacetyl group-containing polyvinyl alcohol resin particles composition at a temperature of 40° C. to 120° C. at a pressure of not higher than 20 kPa after the washing. The acetoacetyl group-containing polyvinyl alcohol resin powder composition thus produced is highly soluble in water.
Claims4
Acetoacetyl group-containing polyvinyl alcohol resin powder composition comprising:
- acetoacetyl group-containing polyvinyl alcohol resin particles:
- and
- 0.5 to 4 wt % of a C1 to C3 alcohol.
Dependencies are inferred from the claim text.