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Artificial Opals as Effect Pigments in Clear‐Coatings
Author(s) -
Egen Marc,
Braun Lydia,
Zentel Rudolf,
Tännert Klaus,
Frese Peter,
Reis Oliver,
Wulf Martin
Publication year - 2004
Publication title -
macromolecular materials and engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.913
H-Index - 96
eISSN - 1439-2054
pISSN - 1438-7492
DOI - 10.1002/mame.200300152
Subject(s) - materials science , coating , polymer , dispersity , emulsion , colloidal crystal , chemical engineering , crystal (programming language) , structural coloration , polymerization , thermal stability , composite material , colloid , polymer chemistry , photonic crystal , optoelectronics , computer science , engineering , programming language
Summary: In this paper, we describe the use of artificial opals from polymer beads as effect pigments in transparent industrial and automotive coatings. For this purpose, we synthesized monodisperse colloids from fluorinated methacrylates by surfactant‐free emulsion polymerization. The fluorinated monomers, in combination with crosslinking, lead to a refractive index contrast, thermal stability, and solvent resistivity necessary for use as effect pigments. After crystallization of the monodisperse polymer beads, crystal flakes with iridescent colors can be obtained. The crystal flakes can act as effect pigments in various transparent industrial and automotive coatings. Due to photonic crystal behavior of effect pigments, color flops up to 100 nm are observed.Crystal flakes of CS ‐7 as effect pigments in a transparent coating. The diameter of the tube is 5 mm.