| 摘要 |
PROBLEM TO BE SOLVED: To prepare the subject inorganic composition excellent in heat resistance and weather resistance, not causing discoloration and capable of sustainedly exhibiting antibacterial and mildew resistant activity by including a reaction product of a salt of silver, copper or zinc with an alkaline salt of tungstic acid as an active principle. SOLUTION: This inorganic composition contains at least one kind of tungstates of the formula [wherein, X is Ag, Cu or Zn; (n) is 2 when X is Ag and 1 when X is Cu or Zn] as an active principle. The tungstate of the formula is obtained by reacting a salt of silver, copper or zinc with an alkaline salt of tungstic acid (e.g. sodium tungstate, potassium tungstate or the like). This resin composition having antibacterial and mildew resistant activity is prepared by including 0.001-30 wt.% inorganic composition mentioned above and 99.99-70 wt.% resin (e.g. polyethylene resin, polypropylene one, polyvinyl chloride one or the like). The inorganic composition can impart heat resistance, weather resistance and highly antibacterial and mildew resistant activities to a resin product.
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