Compositions – Water-softening or purifying or scale-inhibiting agents
Reexamination Certificate
2005-02-01
2005-02-01
Lipman, Bernard (Department: 1713)
Compositions
Water-softening or purifying or scale-inhibiting agents
C210S749000
Reexamination Certificate
active
06849201
ABSTRACT:
Sulfonated styrene polymer and/or its salt, a waste water treatment material and sludge dehydrating agent each containing the sulfonated styrene polymer and/or its salt as an effective component thereof are disclosed. The waste water treatment material is used such that sulfonated styrene polymer and/or its salt, which has viscosity of 10 mPa·S to 20,000 mPa·S at 25° C. after 0.01 N to 5 N neutral salt has been added to 1 wt % water solution of the sulfonated styrene polymer and/or its salt, is added to each waste water so that waste water is purified. When a sludge dehydrating agent is required, sulfonated styrene polymer and/or its salt having a weight average molecular weight of 1,100,000 or greater is combined with a cation polymer flocculating agent or an inorganic flocculating agent.
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Inagaki Yasuhito
Kano Takaaki
Kiuchi Shigeo
Watanabe Haruo
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