Patent No. U.S. 7,645,336 B2
Clariant has received a patent for an azo pigment formulation comprised of 4,4’-diaminodicyclohexyl-methane wherein a fraction of trans,trans-isomer is at least 25% based on a total amount of 4,4’-diaminodicyclohexylmethane.
Clariant Patents Azo Pigment Preparation
Published April 6, 2010
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