Cement dispersion agents
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United States of America Patent
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Mar 1, 1994
Grant Date -
N/A
app pub date -
Dec 16, 1992
filing date -
Dec 21, 1991
priority date (Note) -
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Abstract
Cement dispersion agents containing a graft copolymer composed of four kinds of constituent unit each having a specified structure can provide improved fluidity to cementing compositions, prevent slump loss after the kneading process and reduce the drying shrinkage of hardened concrete produced at the same time.
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