Polymer having polyether side chains
AssigneeBASF SE
InventorsManfred BICHLER, Martin WINKLBAUER, Joachim DENGLER
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Abstract
The invention relates to a polymer which is obtainable by copolymerizing monomers comprising at least one ethylenically unsaturated monomer which comprises at least one acid group and at least one ethylenically unsaturated monomer (II) having polyether groups with 5 to 35 repeating units and at least one ethylenically unsaturated monomer (III) having polyether groups with 45 to 150 repeating units, the molar ratio of monomer (II) to monomer (III) being between 75:25 and 99.5:0.5. Further disclosed are the use of the polymer of the invention as an admixture for inorganic binder compositions, and a composition in powder form comprising an inorganic binder and the polymer of the invention.
Claims16
A polymer obtained by copolymerizing monomers comprising
- (I) at least one ethylenically unsaturated monomer which comprises at least one acid group and
- (II) at least one ethylenically unsaturated monomer having polyether groups of the structural unit (IIa),
- —(CaH2aO)n— (IIa)
- where
- n is an integer from 5 to 35,
- a independently at each occurrence for each (CaH2aO) unit identically or differently is 2, 3 or 4, and
- (III) at least one ethylenically unsaturated monomer having polyether groups of the structural unit (IIIa),
- —(CbH2bO)m— (IIIA)
- where
- m is an integer from 45 to 150,
- b independently at each occurrence for each (CbH2bO) unit identically or differently is 2, 3 or 4, and
- where the molar ratio of monomer (II) to monomer (III) is between 75:25 and 99.5:0.5.
Dependencies are inferred from the claim text.