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A platform for research: civil engineering, architecture and urbanism
Solvent free waterborne polyurethane coatings for wood floors
New pathways were explored to make aqueous polyurethane dispersions without the co-solvent n-methylpyrolidone (NMP). This includes methods to process these materials with alternate co-solvents as well as with co-solvents that can be removed from the product during processing. Chemical modifications of the polyurethane were incvestigated in order to use these alternative processes. New co-solvent free polyurethane dispersions, useful as coatings for wood floors, have been developed using an alternative process. These materials have outstanding properties, are low odor, and free of NMP. Because of the fact that NMP is a suspected fetotoxin, the search for a NMP free route has led to different approaches towards NMP free polyurethane dispersions already described. These approaches all have drawbacks. Potential solvents for prepolymer mixing process are discussed. It has been shown that the prepolymer mixing process can be used with acetone instead of NMP, despite the somewhat lower solvating power of acetone, if one adapts the process and/ot the recipe. The resulting dispersions allow the formulation of coatings with the same or even better properties as a wood floor coating than dispersions made by the prepolymer mixing process using NMP.
Solvent free waterborne polyurethane coatings for wood floors
New pathways were explored to make aqueous polyurethane dispersions without the co-solvent n-methylpyrolidone (NMP). This includes methods to process these materials with alternate co-solvents as well as with co-solvents that can be removed from the product during processing. Chemical modifications of the polyurethane were incvestigated in order to use these alternative processes. New co-solvent free polyurethane dispersions, useful as coatings for wood floors, have been developed using an alternative process. These materials have outstanding properties, are low odor, and free of NMP. Because of the fact that NMP is a suspected fetotoxin, the search for a NMP free route has led to different approaches towards NMP free polyurethane dispersions already described. These approaches all have drawbacks. Potential solvents for prepolymer mixing process are discussed. It has been shown that the prepolymer mixing process can be used with acetone instead of NMP, despite the somewhat lower solvating power of acetone, if one adapts the process and/ot the recipe. The resulting dispersions allow the formulation of coatings with the same or even better properties as a wood floor coating than dispersions made by the prepolymer mixing process using NMP.
Solvent free waterborne polyurethane coatings for wood floors
Gertzmann, Rolf (author) / Irle, Christoph (author) / Schmitt, Peter (author)
2007
13 Seiten, 9 Bilder, 5 Tabellen, 9 Quellen
Conference paper
English
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