Polyphosphoric acid swelling of organic pigments

Details Polyphosphoric acid swelling of organic pigments Polyphosphoric acid swelling of organic pigments

C - Chemistry, Metallurgy

09

B

C09B 67/14 (2006.01) C09B 67/16 (2006.01)

Patent

CA 2428311

A method of conditioning an organic crude pigment by treating, under high shear, 1 part by weight of the crude pigment and about 0.5 to 1.9 parts by weight of polyphosphoric acid or polyphosphoric acid methyl ester at a temperature ranging from about 90 to 160 C.

La présente invention a trait à un procédé de conditionnement d'un pigment organique naturel consistant à traiter, sous un cisaillement élevé, 1 partie en poids du pigment naturel et environ 0,5 à 1,9 parties en poids d'acide polyphosphorique ou d'ester méthylique d'acide polyphosphorique à une température comprise entre 90 et 160 ·C.

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