Mortar containing polyurethane dispersion with ethylene oxide units
AssigneeSika Technology AG
InventorsCraig Evans, Ian Martin, Yolanda Pardos, Ramiro Garcia, Luz Granizo
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Abstract
A composition including: at least one waterbased polyurethane dispersion containing ethylene oxide units; at least one cement; and at least one mineral filler. The composition can be mixed and applied without coagulation of the polyurethane dispersion. Upon curing, it has a high strength and good adhesion properties, with surprisingly low shrinkage and most surprisingly good water impermeability properties. It is particularly suitable for the use as repair mortar, waterproofing mortar or screed mortar.
Claims14
A composition comprising
- at least one waterbased polyurethane dispersion containing ethylene oxide units,
- at least one cement, and
- at least one mineral filler,
- wherein the polyurethane dispersion contains an amount of ethylene oxide units in a range of from 5 to 20 weight-% based on the total weight of the polyurethane polymer without water, diluents or other additives.
A method comprising combining a waterbased polyurethane dispersion containing ethylene oxide units with a cementitious mortar system,
- wherein the polyurethane dispersion contains an amount of ethylene oxide units in a range of from 5 to 20 weight-% based on the total weight of the polyurethane polymer without water, diluents or other additives.
Dependencies are inferred from the claim text.