Cement-based plasters using water retention agents prepared from raw cotton linters
OwnerWilfried Hohn, Dieter Schweizerinventors
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Abstract
A mixture composition of a cellulose ether made from raw cotton linters and at least one additive is used in a dry cement based plaster (or render) composition wherein the amount of the cellulose ether in the render composition is significantly reduced. When this render composition is mixed with water and applied to a substrate, the water retention and thickening and/or sag resistance of the wet plaster are comparable or improved as compared to when using conventional similar cellulose ethers.
Claims43
A mixture composition for use in a render composition comprising
- a) a cellulose ether in an amount of 20 to 99.9 wt % selected from the group consisting of alkylhydroxyalkyl celluloses, hydroxyalkyl celluloses, and mixtures thereof, prepared from raw cotton linters, and
- b) at least one additive in an amount of 0.1 to 80 wt % selected form the group consisting of organic or inorganic thickening agents, anti-sag agents, air entraining agents, wetting agents, defoamers, superplasticizers, dispersants, calcium-complexing agents, retarders, accelerators, water repellants, redispersible powders, biopolymers, and fibres,
- wherein when the mixture is used in a dry render formulation and mixed with a sufficient amount of water, the formulation will produce a plaster mortar that can be applied to substrates, wherein the amount of the mixture in the plaster mortar is significantly reduced while water retention and thickening and/or sag-resistance of the wet plaster mortar are comparable or improved as compared to when using conventional similar cellulose ethers.
A dry render composition comprising at least hydraulic cement, fine aggregate material, and a water-retaining agent of at least one cellulose ether prepared from raw cotton linters,
- wherein the dry render composition, when mixed with a sufficient amount of water, produces a plaster mortar which can be applied on substrates, wherein the amount of water retaining agent in the plaster mortar is significantly reduced while the water retention and thickening and/or sag-resistance of the wet plaster mortar are comparable or improved as compared to when using conventional similar cellulose ethers.
Dependencies are inferred from the claim text.