Composition and process for the generation of a clear or translucent emissive coating
AssigneeChemetall GmbH
InventorsNoel Smith, Charles J. Gruszka, Aaron Thompson, Michael Deemer
Life of this patent
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Abstract
A composition for applying a clear or translucent and colorless or nearly colorless emissive coating on a metallic surface comprising in a dispersion a) 50 to 300 g/L of at least one of clear or translucent organic polymeric substances of a binder, and b) 30 to 300 g/L of sheet silicate pigments having a TE value for the thermal emissivity of at least 0.40, having a particle size distribution of which d50 is in the range of 0.3 to 80 μm. Processes for applying the composition and elements prepared therefrom are also disclosed.
Claims3
A composition for applying a clear or translucent and colorless or nearly colorless emissive coating to a substrate surface, the composition consisting of:
- a) a binder consisting of:
- 50 to 300 g/L of ethylene acrylic copolymer;
- b) 30 to 300 g/L of mica;
- c) 0.05 to 30 g/L of an amine selected from the group consisting of N,N-dimethylisopropylamine, 2-[(1-methylpropyl)amino]ethanol, and combinations thereof;
- d) 0.05 to 150 g/L of at least one defoamer;
- and
- e) water;
- wherein the mica has a TE value in accordance with ASTM C-1371-04a for the thermal emissivity of at least 0.40 and a particle size distribution of which d50 is in a range of from 0.4 μm to 60 μm;
- wherein the composition has a weight ratio of mica to binder in a range from 0.3:1 to 1:1;
- and
- wherein when the emissive coating is prepared from the composition, said emissive coating has a total solar reflectance TSR in accordance with ASTM C-1549-04 of at least 0.55, and a solar reflectance index SRI calculated in accordance with ASTM E 1980-01 of at least 40%.
Dependencies are inferred from the claim text.