DYNAMIC RESPONSE COMPONENTS WITH AESTHETIC PROPERTIES

摘要

The composition comprises: (a) a compound of formula (I), (b) a polymeric matrix comprising a crosslinked polymer, the matrix having a viscosity value comprised from 1×10⁻³ to 1×10¹² Pa·s, (c) a redox pair, and (d) a solvent, the compound of formula (I) and the redox pair being embedded in the polymeric matrix; and wherein: R₁ and R₂ are selected from: a (C₁-C₂₀)alkyl; (C₁-C₂₀)alkyl substituted; a 2 to 20-member heteroalkyl; a 2 to 20-member heteroalkyl substituted; (C₂-C₂₀)alkenyl; (C₂-C₂₀)alkenyl substituted; (C₂-C₂₀)alkynyl; (C₂-C₂₀)alkynyl substituted; and a known ring system; R₃ to R₁₀ are selected from hydrogen; (C₁-C₂₀)alkyl; (C₁-C₂₀)alkyl substituted; and nitro; and X is a monocharged anion.;The present invention also relates to processes for its preparation and to devices comprising it.;The multichromic composition shows a short switching time and low transmission in the most visible range, which makes it effective in blocking the whole visible radiation in smart windows.;