Aqueous coating substance, method for the production thereof, and use thereof
AssigneeBASF Coatings GmbH
InventorBernhard Steinmetz
Life of this patent
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Abstract
The present invention relates to an aqueous coating material comprising at least one stabilized, saturated or unsaturated polyurethane and at least one alkoxylated monoalcohol, to a process for preparing the coating material, and to its use.
Claims16
An aqueous coating material comprising (a) at least one polyurethane that is stabilized either ionically or nonionically, (b) at least one wetting and/or dispersing agent, and (c) at least one alkoxylated monoalcohol of the following formula
- R-[AO]n—H
- wherein the alkoxylated monoalcohol is present in an amount of 0.1 to 5% by weight, based on the weight of the coating material, the radical R being an alkyl radical having 8 to 20 C atoms, the index n being an integer from 1 to 5, and the radical [AO] representing an alkylene oxide radical.
A method of increasing a pinholing limit and/or reducing a pinhole count, comprising adding an alkoxylated monoalcohol of the formula R-[AO]n—H to a polyurethane-containing coating material in an amount of 0.1 to 5% by weight, based on the weight of the coating material, wherein the radical R is an alkyl radical having 8 to 20 C atoms, the index n is an integer from 1 to 5, and the radical [AO] is an alkylene oxide radical and the method of increasing a pinholing limit and/or reducing a pinhole count is in comparison with a polyurethane-containing coating material without the alkoxylated monoalcohol of the formula R-[AO]n—H as defined above.
A method of increasing hiding power of a coating material, comprising adding an alkoxylated monoalcohol of the formula R-[AO]n-H to a pigmented polyurethane-containing coating material in an amount of 0.1 to 5% by weight based on the weight of the pigmented polyurethane-containing coating material, wherein the radical R is an alkyl radical having 8 to 20 C atoms, the index n is an integer from 1 to 5, and the radical [AO] is an alkylene oxide radical and the method of increasing hiding power is in comparison with a pigmented polyurethane-containing coating material without the alkoxylated monoalcohol of the formula R-[AO]n—H as defined above.
Dependencies are inferred from the claim text.