Therefore, performance and manufacturing method thereof having a cement additive
The present invention provides a cement admixture that comprises at least one of a carboxylic acid based copolymer comprising a reactive surfactant as a monomer or a copolymer salt obtained by neutralizing the copolymer with an alkaline substance, a method for preparing the same, and a cement composition comprising the same. The cement admixture of the present invention increases composition fluidity even at a high water-reducing formulation by improving dispersibility of cement particles, prevents a decrease of fluidity as the function of time, and offers good workability by supplying an adequate amount of air flow continuously.
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(2007/10/13)
Structure-activity relationships of 3-(substituted benzoyl)propionic acids, a new class of antispasmodics for biliary smooth muscle
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Murata,Satoh,Nohara,et al.
p. 17 - 20
(2007/10/09)
3-(Trisubstituted benzoyl)-propionic acid
The present invention relates to a compound of the formula: SPC1 Wherein R1 is an alkyl group of 1 to 4 carbons, an alkoxy group of 1 to 4 carbons or hydroxyl, and R2 and R3 are either the same or different and may be an a
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(2008/06/13)
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