PIGMENT MIXTURE OF PVD ALUMINIUM EFFECT PIGMENTS AND THIN ALUMINIUM EFFECT PIGMENTS FROM MILLING, PROCESS FOR PREPARATION THEREOF AND USE THEREOF
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United States of America Patent
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Issued Date -
Apr 14, 2011
app pub date -
Jun 25, 2009
filing date -
Jun 25, 2008
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Abandoned
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Abstract
A mixture of aluminum effect pigments, the mixture comprising: a) PVD aluminum effect pigments (PVD Al) which, in a thickness distribution as determined via thickness counting by scanning electron microscopy (SEM) and represented as cumulative frequency distribution, have an H.sub.50,PVD value in a range from 10 nm to 7 nm, b) aluminum effect pigments (conv.-Al) which have been produced by milling methods and, in a thickness distribution as determined via thickness counting by scanning electron microscopy (SEM) and represented as cumulative frequency distribution, have an h.sub.50,conv. value in a range from 15 nm to 100 nm, and c) a solvent or solvent mixture, with the proviso that the weight ratio of PVD Al to conv. Al is 99:1 to 1:99 and the solvent content is at least 30% by weight, based on the total weight of the mixture. The disclosure further relates to a process for preparing the mixture and to the use of the mixture.
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