C - Chemistry – Metallurgy – 04 – B
Patent
C - Chemistry, Metallurgy
04
B
C04B 24/02 (2006.01) C04B 24/32 (2006.01) C04B 28/02 (2006.01) C04B 40/00 (2006.01)
Patent
CA 2363087
A cement additive composition for concrete surface discoloration prevention which comprises a combination of a cement additive (a) and a water reducing agent (b) in an (a)/(b) ratio of (5-99.5)/(95-0.5) by weight and in which the additive (a) comprises a mixture of compounds represented by the following general formula (1): R1O(AO)n1H which comprise compounds wherein n1 is each of the integers of from 2 to 6 in a total amount of 40 wt.% or more based on the additive (a), the average of n1 is 1.5 to 10, and the additive (a) has a molecular weight distribution, Mw/Mn, of 1.05 or higher and a Z-average molecular weight, Mz, of 200 or higher. It is effective in preventing the surface of a concrete from discoloring. (In the formula, R1 is C1-6 alkyl; A is ethylene and/or propylene; and n1 is a number of 1 or larger.)
L'invention porte sur une composition d'additif pour ciment empêchant la décoloration des surfaces de ciment comprenant un mélange de: (a) un additif pour ciment et de (b) un agent réducteur d'eau dans le rapport pondéral a/b compris entre (5-99,5)/(95-0,5) où l'additif (a) est un mélange de composés de formule générale (1) R¿1?O(AO)n¿1?H dans laquelle n¿1? est un entier de 2 à 6, représentant de 40 % ou plus du poids de (a), la moyenne de n¿1? est comprise entre 1,5 et 10, et l'additif (a) présente une distribution en poids moléculaire Mw/Mn de 1,05 ou plus et un poids moléculaire moyen Mz de 200 ou plus. Dans la formule (I), R¿1? est C¿1-6? alkyle; A est éthylène et/ou propylène; et n est un nombre égal ou supérieur à 1.
Ayata Takashi
Hondo Fumiaki
Shimoyama Yoshihide
Tanaka Satoshi
R. William Wray & Associates
Sanyo Chemical Industries Ltd.
Taiheiyo Cement Corporation
LandOfFree
A cement additive, a concrete composition and a structure... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with A cement additive, a concrete composition and a structure..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A cement additive, a concrete composition and a structure... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1929773