Patent ID: 6194484
Filing Date: 2001-02-27
Classification: C09D

Abstract:
A coating material comprisinga) a binding agent having a transparency of at least 30% in the range of visible light from 0.35 to 0.7 .mu.m and at least 20% in the range of the thermal infrared from 5 to 100 .mu.mb) particles which are selected from at least one of the group consisting offirst plate-shaped particles which reflect in the wavelength range of the thermal infrared from 5 to 100 .mu.m and whose dimensions are L.times.B.times.T, L=5-100 .mu.m, B=5-100 .mu.m and T=0.1-5 .mu.m, whereby L=length, B=breadth, and T=thickness,first spherical particles which backscatter (Mie backscattering) in the wavelength range of thermal infrared from 5 to 100 .mu.m and have a degree of transmission in this wavelength range of at least 20% and are present as monocrystals, wherein the average diameter d of said spherical particles is determined by the formulad=10.mu.m/2.1.multidot.(n.sub.T10 -n.sub.B10),whereinn.sub.T10 =refractive index of said spherical particle at the wavelength 10 .mu.m andn.sub.B10 =refractive index of said binding agent at the wavelength 10 .mu.m, andsecond spherical particles which have a hollow space in the dry state that are comprised of a material that has a degree of transmission in the range of the thermal infrared from 5 to 100 .mu.m of >20% and reflect in the wavelength range of the thermal infrared from 5 to 100 .mu.m and whose average diameter is 2 to 20 .mu.mc) particles which are selected from at least one of the group consisting ofsecond particles which reflect in the wavelength range of visible light from 0.35 to 0.7 .mu.m and have a degree of transmission in the wavelength range of the thermal infrared from 5 to 100 .mu.m of >20% and which are present as monocrystalst wherein the average diameter d of said second particle is determined by the formulad=0.55.mu.m/2.1.multidot.(n.sub.T0.55 -n.sub.B0.55),whereinn.sub.T0.55 =refractive index of said second particle at the wavelength 0.55 .mu.m andn.sub.B0.55 =refractive index of said binding agent at the wavelength 0.55 .mu.m, andpolymer pigments particles having a degree of transmission in the thermal infrared range of 5 to 100 .mu.m of >20% and having a hollow space in the dry state, wherein the average diameter of said polymer pigment particles is 0.2 to 2 .mu.md) third spherical particles which are electrically conducting and have an absorption in the range of the thermal infrared from 5 to 25 .mu.m of <80% and whose average diameter is 0.1 to 2 .mu.me) at least one additive conventionally used in coatings.