Admixture for hydraulic cement
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United States of America Patent
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Feb 6, 1996
Grant Date -
N/A
app pub date -
Nov 18, 1994
filing date -
Nov 24, 1993
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Expired
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Abstract
A hydraulic cement composition comprising as an effective component a water-soluble amphoteric polymer obtained by Hofmann degradation reaction of an .alpha.,.beta.-unsaturated carbonamide polymer or a copolymer of .alpha.,.beta.-unsaturated carbonamide and an anionic monomer having a weight average molecular weight of 1,000-1,000,000. The primary amino group produced as a result of the Hofmann degradation reaction provides excellent cement dispersing capabilities.
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