| 摘要 |
PCT No. PCT/DE96/00069 Sec. 371 Date Sep. 17, 1998 Sec. 102(e) Date Sep. 17, 1998 PCT Filed Jan. 11, 1996 PCT Pub. No. WO96/22337 PCT Pub. Date Jul. 25, 1996A coating material having reflective properties in two wavelength ranges and absorbent properties in a third wavelength range. The coating material comprises a binder, flaky first particles, and second particles. The binder has a transparency greater than 40% in the wavelength ranges of from 0.4 to 0.7 mu m and from 10 to 50 mu m and a refractive index n in the wavelength ranges less than 2.0. The coating material comprises from 20 to 30 percent by weight, based on the wet weight of the coating material, of the flaky first particles. The flaky first particles have a thickness less than 10 mu m and a surface area (lengthxwidth) greater than 100 mu m2 and a reflectivity R greater than 40% in the wavelength range of from 10 to 50 mu m. The second particles at least partially overlap the first particles. The second particles have a transparency greater than 40% only in the wavelength ranges of from 0.4 to 0.7 mu m and from 10 to 50 mu m, but an absorption greater than 20% in the wavelength range of from 1.0 to 2.0 mu m, as well as a refractive index in the wavelength range of from 0.4 to 0.7 mu m greater than that of the binder. The size of the second particles are selected such that there is an optimum back scattering and thus reflective effect in the wavelength range of from 0.4 to 0.7 mu m. |
