Patent ID: 9051218
Filing Date: 2015-06-09
Classification: B28B,C04B,C08B

Abstract:
1. A building composition comprising at least one hydraulically setting material and at least one cellulose ether, wherein at least a part of the hydroxyl groups of the cellulose backbone of the at least one cellulose ether are substituted by methoxy groups and hydroxyalkoxy groups such that (S 23 /S 26 −0.2*MS) is 0.38 or less, wherein MS is the molar substitution of hydroxyalkoxy groups and S 23 represents the molar fraction of the anhydroglucose units, wherein only the two hydroxyl groups at the 2- and 3-positions of the anhydroglucose units are each substituted by a methoxy group and wherein S 26 represents the molar fraction of the anhydroglucose units, wherein only the two hydroxyl groups at the 2- and 6-positions of the anhydroglucose units are each substituted by a methoxy group.