Weather-resistant pearlescent pigments, process for the production and use thereof

  • US 9,631,097 B2
  • Filed: 09/30/2013
  • Issued: 04/25/2017
  • Est. Priority Date: 10/02/2012
  • Status: Active Grant
First Claim
Patent Images

1. A weather-resistant pearlescent pigment, comprising:

  • a coated or uncoated platelet-shaped substrate which is selected from the group consisting of synthetic mica platelets, glass platelets, SiO2 platelets, Al2O3 platelets, synthetic boehmite platelets, BiOCl platelets and mixtures thereof,a chromophoric coating comprising at least one highly refractive metal oxide, anda top layer,wherein the top layer comprises the following layer sequence;

    a) a first layer comprising tin oxide and/or tin hydroxide and/or hydrated tin oxide,b) a second cerium-containing layer consisting of cerium oxide and/or cerium hydroxide and/or hydrated cerium oxide,c) an organic-chemical coating applied to the cerium-containing layer which comprises one or more oligomeric silane(s), wherein the oligomeric silane(s) have one or more amino groups and the oligomeric silane(s) are chemically bonded with the cerium-containing layer.

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