Copolymer and cement dispersant including the copolymer
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United States of America Patent
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Sep 16, 2014
Grant Date -
Jan 17, 2013
app pub date -
Mar 31, 2011
filing date -
Mar 31, 2010
priority date (Note) -
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Abstract
A cement dispersant that includes a copolymer resulting from a reaction of components (A) to (C), where: (A) is an ester compound obtained by adding 0 to 10 moles of C2-4 alkylene oxide to 1 mole of at least one compound of Formula (1) RO-(AO)n-H (where R is a C1-12 alkyl group, A is a C2-4 alkylene group, and n is an integer of 0 to 7) and subjecting the resulting adduct to a reaction with an α,β-unsaturated carboxylic acid, in which the compound of Formula (1) contains not more than 5% by mass of the constituent compounds having n of 3 or less relative to the total mass of the compound of Formula (1); (B) is an α,β-unsaturated carboxylic acid or a salt thereof; and (C) is another copolymerizable monomer, where appropriate, or a salt thereof.
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