Pigments for filtering the solar spectrum
AssigneeSun Chemical Corporation
InventorsJonathan Daniel Doll, Paul Andrew Merchak, John Aldred Nimmo, Aaron M. Hollman
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Abstract
The present technology relates to a transparent coating system or film which comprises a transparent, polymeric material, one or more pearlescent pigments, and one or more transparent dyes, organic pigments, organic pigment derivatives or inorganic pigments. The coating may be used to give well-defined transmission and reflection spectra in the visible region while having a high degree of reflection in the NIR region.
Claims14
A transparent coating system for light filtering between 400-2500 nm, comprised of a transparent polymeric binder, one or more pearlescent pigments, and one or more absorption pigments selected from organic pigments, organic pigment derivatives and/or inorganic pigments, having a total pigment loading;
- in a wet film, of between about 0.5%-20%, by weight;
- and
- wherein
- a. TSR of the pigment blend between the wavelengths of about 400 nm-2500 nm, is in the range of about 40%-85%;
- and
- b. TST of the pigment blend between the wavelengths of about 400 nm-2500 nm, is in the range of about 40%-85%;
- and
- wherein the ratio of the
- percent transmission at 660 nm to the percent transmission at 730 nm is in the range of about 0.5-2.0.
A transparent coating system for light filtering between 400-2500 nm, that is comprised of a transparent polymeric binder, one or more pearlescent pigments, and one or more absorption pigments selected from organic pigments, organic pigment derivatives and/or inorganic pigments, having a total pigment loading in a wet film, is between about 0.5%-20%, by weight;
- and
- wherein
- the TST of the pigment blend at about 5% total pigment loading is in the range of:
- a. about 40%-70% between the wavelengths of 400 nm and 495 nm;
- b. about 25%-65% between the wavelengths of 495 nm and 590 nm;
- and
- c. about 60%-95% between the wavelengths of 590 nm and 750 nm;
- and
- the TSR of the pigment blend between the wavelengths of about 400 nm-2500 nm, is in the range of about 10%-40%;
- and
- wherein the ratio of the
- percent transmission at 660 nm to the percent transmission at 730 nm is in the range of about 0.5-2.0.
Dependencies are inferred from the claim text.