Cementitious composition comprising powdered polyurethane
AssigneeSika Technology AG
InventorsJerome SOUDIER, Guillaume LE SAINT, Alexandre BEN HARRATH, Ludovic AGUERO
Life of this patent
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Abstract
A cementitious composition, in particular a dry mortar, including a) 5-50 mass parts, preferably 10-45 mass parts, more preferably 15-29 mass parts of a composite hydraulic binder, b) 0.1-4 mass parts, preferably 0.5-3 mass parts, more preferably 1-2 mass parts of powdered polyurethane, and c) optionally 50-90 mass parts, preferably 60-85 mass parts of aggregate. The cementitious composition is particularly useful as a cementitious tile adhesive, a render or part of a render system.
Claims15
A cementitious composition, wherein it comprises
- a) 5-50 mass parts of a composite hydraulic binder,
- b) 0.1-4 mass parts of powdered polyurethane, and
- c) optionally 50-90 parts of aggregate.
Method for improving the flexibility of a cementitious composition, the method comprising the following steps
- a) mixing 5-50 mass parts of a composite hydraulic binder, 0.1-4 mass parts of powdered polyurethane, optionally 50-90 mass parts, optionally further minerals, optionally further additives, and water
- b) applying the mixture obtained in step a) on a support or casting the mixture obtained in step a) into a mold, and
- c) hardening the mixture to obtain a hardened body.
Method for lowering the density of a processable cementitious composition, the method comprising the following steps
- a) mixing 5-50 mass parts of a composite hydraulic binder, 0.1-4 mass parts of powdered polyurethane, optionally 50-90 mass parts, optionally further minerals, optionally further additives, and
- b) mixing the mixture obtained in step a) with water in a water/powder ratio between 0.1-0.6.
Dependencies are inferred from the claim text.