Aqueous cement composition

Details Aqueous cement composition Aqueous cement composition

2007-10-30

2007-10-30

Marcantoni, Paul (Department: 1755)

Compositions: coating or plastic

Coating or plastic compositions

Inorganic settable ingredient containing

C106S172100, C106S162800, C106S162820, C536S056000, C536S084000

Reexamination Certificate

active

10497371

ABSTRACT:
A fresh aqueous cement composition suitable for building purposes is described. It contains, besides a hydraulic cement, a methyl ethyl cellulose ether having a DS methyl of 0.4-2.2, a DS ethyl of 0.05-0.8 and a MS hydroxy-(C2-C3)-alkyl of 0-2. The celulose ether imparts excellent rheology properties, including a high water-retention combined with a long open time, to the cement composition. A dry blend and a rheology additive containing the cellulose ether are also described.

REFERENCES:
patent: 5234968 (1993-08-01), Debus et al.
patent: 5372642 (1994-12-01), Bartz et al.
patent: 2709122 (1995-02-01), None
patent: 8026801 (1996-01-01), None
patent: 9012379 (1997-01-01), None
International Prelimary Examination Report; PCT/SE02/02164; International Filing date Nov. 26, 2002; Priority Date Dec. 3, 2001; 3 pages.
International Search Report, No. PCT/WO 03/048070 A1, Jun. 12, 2003.
Abstract of JP 200203915A.
Abstract of JP 8026801A.
Abstract of JP 9012379A.
Abstract of FR 2709122A1.
Ullmann's Encyclopedia of Industrial Chemistry, Fifth, Completely Revised Edition vol. A5, pp. 468-474.
DIN 18156 Part 2; Mar. 1978; pp. 1-4.
ASTM C91-71; “Standard Specification for Masonry Cement”; American National Standards Institute; Aug. 30, 1971; pp. 55-61.
ASTM C230-68 ; “Standard Specification For Flow Table For Use In Tests Of Hydraulic Cement”; American National Standards Institute; Sep. 13, 1968; pp. 200-205.

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