Dry mortars with improved processing properties
AssigneesWacker Polymer Systems GmbH & Co. KG, Brillux GmbH & Co. KG
InventorsFranz Jodlbauer, Felix Asen, Manfred Kugel
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Abstract
The invention provides cementitious dry mortars comprising a) from 0.5 to 80% by weight of cement, b) from 0 to 97% by weight of fillers, c) from 0 to 3.5% by weight of thickeners, wherein a polymer powder composition is present, with d) from 1.0 to 80% by weight of redispersible polymer powder, e) from 0.02 to 4.0% by weight of one or more compounds from the group consisting of zinc oxide, zinc hydroxide, and zinc hydroxide carbonate, f) from 0 to 30% by weight of alkali metal hydroxide and/or alkaline earth metal hydroxide, based in each case on the overall weight of the dry mortar, the percentages by weight adding up to 100% by weight.
Claims16
A cementitious dry mortar comprising
- a) from 0.5 to 80% by weight of cement,
- b) from 0 to 97% by weight of fillers,
- c) from 0 to 3.5% by weight of thickeners, wherein a polymer powder composition is present, with
- d) from 1.0 to 80% by weight of redispersible polymer powder,
- e) from 0.02 to 4.0% by weight of one or more compounds from the group consisting of zinc oxide, zinc hydroxide, and zinc hydroxide carbonate,
- f) from 0 to 30% by weight of alkali metal hydroxide and/or alkaline earth metal hydroxide,
- based in each case on the overall weight of the dry mortar, the percentages by weight adding up to 100% by weight.
A cementitious dry mortar comprising
- a) from 8 to 16% by weight of Portland cement,
- b) from 75 to 90% by weight of one or more fillers from the group consisting of calcium carbonate and/or quartz sand,
- c) from 0.05 to 0.5% by weight of at least one thickener selected from the group consisting of cellulose ethers, modified cellulose ethers, and optionally acetalized and/or hydrophobically modified polyvinyl alcohols,
- d) from 1 to 10% by weight of redispersible powders based on at least one monomer selected from the group consisting of vinyl esters of unbranched or branched C1-15 alkylcarboxylic acids, methacrylic esters of C1-10 alcohols, acrylic esters of C1-10 alcohols, vinylaromatics, olefins, dienes, and vinyl halides,
- e) from 0.05 to 0.5% by weight of zinc oxide, and
- f) from 0.1 to 4% by weight of calcium hydroxide.
A process for preparing a water-containing settable mortar, comprising mixing components a) to f) to a dry mortar and admixing the amount of water required for processing to a settable mortar, optionally adding further individual components subsequently to the preparation of the water-containing settable mortar.
A process for preparing water-containing settable cementitious mortar compositions, comprising separately adding individual components a) to f) to water and mixing to give a water-containing, settable composition.
A process for preparing setting-retarded cementitious mortar compositions, comprising adding to a mixture comprising cement and optional filler, a formulated redispersible powder comprising at least one compound e) selected from the group consisting of zinc oxide, zinc hydroxide, and zinc hydroxy-carbonate, optionally a thickener c) and/or optionally one or more alkali metal hydroxides and/or alkaline earth metal hydroxides.
Dependencies are inferred from the claim text.