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US 10,472,283 B2Granted
Use of comb polymers for controlling the rheology of mineral binder compositions
AssigneeSika Technology AG
InventorsLukas Frunz, Loic Lorcet, Jörg Zimmermann, Pierre Petriol, Julien Gueville, Walter De Carvalho
Life of this patent
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Abstract
A comb polymer is used for increasing the flow rate and/or reducing the viscosity of a mineral binder composition, where the comb polymer has a main chain including acid groups and there are pendent chains linked to the main chain, and where the average number-average molar mass of all of the pendent chains is from 120 to 1000 g/mol and the molar ratio of the acid groups to the side chains is in the range from 0.5 to 2.
Claims25
A process comprising:
- obtaining a comb polymer having:
- a main chain comprising acid groups, and side chains attached on the main chain, where a number-average molecular weight (Mn) of all side chains in a range of from 120-800 g/mol, and a molar ratio of the acid groups to the side chains in the range of from 0.5-1.7;
- and
- mixing the comb polymer, a mineral binder and water to form a mineral binder composition;
- wherein
- the comb polymer is mixed into the binder composition in an amount sufficient to increase the flow rate and/or reduce the viscosity of the mineral binder composition relative to an analogous mineral binder composition that does not contain the comb polymer but otherwise is identical with the mineral binder composition comprising the comb polymer, the amount of the comb polymer also being effective to keep the yield point and/or the slump flow of the binder composition from deviating by less than 2% from that of the analogous mineral binder composition, wherein the yield point, the slump flow, the flow rate and the viscosity are measured according to DIN EN 12350-8:2010-12.
3 more elements
A process comprising:
- obtaining a comb polymer having:
- a main chain comprising acid groups, and side chains attached on the main chain, where a number-average molecular weight (Mn) of all side chains in a range of from 120-800 g/mol, and a molar ratio of the acid groups to the side chains in the range of from 0.5-1.7;
- and
- mixing the comb polymer, a mineral binder and water to form a mineral binder composition;
- wherein
- the comb polymer is mixed into the binder composition in an amount sufficient to increase the flow rate and/or reduce the viscosity of the mineral binder composition relative to an analogous mineral binder composition that does not contain the comb polymer but otherwise is identical with the mineral binder composition comprising the comb polymer, the amount of the comb polymer also being effective to keep the yield point and/or the slump flow of the binder composition from deviating by less than 1% from that of the analogous mineral binder composition, wherein the yield point, the slump flow, the flow rate and the viscosity are measured according to DIN EN 12350-8:2010-12.
3 more elements
Dependencies are inferred from the claim text.