US 2018/0362404 A1

Cement admixture

(22) 06.12.2016

(43) 20.12.2018

(57) Conventional methods suffer from unsatisfactory performance of the dehydration-preventing agent at a high temperature, and the present invention provides a cement admixture exhibiting an excellent dehydration-preventing effect at a high temperature. The cement admixture of the present invention includes a crosslinked product of a modified polyvinyl alcohol-based resin, wherein the dissolution rate of 1 g of the crosslinked product of a modified polyvinyl alcohol-based resin for 1 liter of water at 70° C. is 50 % or less.

(71) The Nippon Synthetic Chemical Industry Co., Ltd., Osaka (JP)

(73) The Nippon Synthetic Chemical Industry Co., Ltd., Osaka (JP)

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