Humidity-resistant bluish luster pigments

Details Humidity-resistant bluish luster pigments Humidity-resistant bluish luster pigments

C - Chemistry, Metallurgy

09

C

C09C 3/12 (2006.01) A61K 8/29 (2006.01) A61K 8/58 (2006.01) A61Q 1/02 (2006.01) A61Q 19/00 (2006.01) C03C 1/10 (2006.01) C04B 33/14 (2006.01) C08K 9/02 (2006.01) C09C 1/00 (2006.01) C09D 5/36 (2006.01)

Patent

CA 2215215

14 Humidity-resistant bluish luster pigments Humidity-resistant bluish luster pigments based on titania-coated silicatic platelets heated in a reducing atmosphere are obtainable by reaction of the reduced platelets with a silane of the general formula I RaSiXb where: I R is a C1-C10-alkyl radical with substituted in the .omega.-position by a glycidoxy group, by an amino group, by a hydroxyl group or by a monoalkylamino group or an alkoxy radical whose alkyl chains may each contain up to 10 carbon atoms and may be interrupted by from 1 to 5 ether oxygen atoms or imino groups, the radicals R for a > 1 being identical or different; X is C1-C4-alkoxy; a is 1 or 2; and b is 2 or 3, subject to the proviso that a + b = 4.

Pigments bleuâtres lustrés résistant à l'humidité, sur des lamelles de silicates revêtues d'oxyde de titane, chauffées dans une atmosphere réductrice; ils peuvent être obtenus par réaction des lamelles réduites avec un silane de formule générale RaSiXb, où R est un radical alkyle C1-C10 avec substitution en oméga par un groupe glycidoxy, amino, hydroxyle, monoalkylamino ou un alcoxy dont les chaînes alkyles peuvent contenir chacune jusqu'à 10 atomes de carbone, interrompus par 1 à 5 atomes d'oxygène d'éthers-oxydes ou par des groupes imino; les radicaux R pour a > 1 sont identiques ou différents; X est un alcoxy; a est 1 ou 2; b est 2 ou 3, à la condition que a + b = 4.

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