Maleic acid/(meth)acrylic acid copolymers useful as calcium ion capturing agents
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United States of America Patent
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May 28, 1985
Issued Date -
N/A
app pub date -
Apr 9, 1984
filing date -
Apr 13, 1981
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A copolymer of maleic acid (MA) and (meth)acrylic acid (AA), or a salt thereof, wherein the molar ratio (MA/AA) .gamma. of the constituent monomers is 1.15 to 2.7, the average molecular weight MW is 1000 to 8000, and (.gamma.).times.(MW) is at least 3000. The copolymer is useful as a calcium ion capturing agent, in a process for treating water to inhibit formation of scale surfaces contacted by the water.
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