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US 8,273,808 B2Granted
Dispersing agents for gypsum plaster compositions
AssigneeSika Technology AG
InventorsChristina Hampel, Ueli Sulser, Jabbar Al Shemari, Jorg Zimmermann
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Abstract
A polymer P as a dispersant for gypsum compositions, as well as gypsum compositions including the polymer P. The polymer P includes at least one acid unit and at least one long side chain with a molecular weight of at least 1800 g/mol, including polyoxyalkylene groups, and has an acid content of 1.5 to 4 acid groups per gram of polymer.
Claims19
A gypsum composition comprising:
- a binder comprising at least 30 wt % gypsum relative to a total weight of the binder;
- and
- a polymer P comprising:
- a main chain containing hydrocarbon groups;
- at least one side chain including at least one acid group, the acid group selected from the group consisting of a carboxylic acid group, a sulfonic acid group, a phosphonic acid group, a phosphoric acid group, and a salt thereof;
- and
- at least one polyoxyalkylene group, wherein the polyoxylalkylene group is connected to the main chain through a linkage, the linkage including at least one ester, amide, or imide group;
- wherein:
- the polymer P is a dispersant for the gypsum composition;
- and
- the polymer P has an acid content of 1.8 to 4 mmol acid groups per gram of polymer.
8 more elements
A binder comprising:
- at least 30 wt % gypsum relative to a total weight of the binder;
- and
- a polymer P comprising:
- a main chain containing hydrocarbon groups;
- at least one side chain including at least one acid group, the acid group selected from the group consisting of a carboxylic acid group, a sulfonic acid group, a phosphonic acid group, a phosphoric acid group, and a salt thereof;
- and
- at least one polyoxyalkylene group, wherein the polyoxylalkylene group is connected to the main chain through a linkage, the linkage including at least one ester, amide, or imide group;
- wherein the polymer P has an acid content of 1.8 to 4 mmol acid groups per gram of polymer.
5 more elements
Dependencies are inferred from the claim text.