Patent Number: 6,251,177

Title: Solid phthalocyanine preparations

Abstract: Solid preparations of metal-containing or metal-free phthalocyanine dyes, a) which have an average particle size of greater than 100 .mu.m, and b) which have a pH of greater than or equal to 10 when dissolved in 10 times the amount of water, are particularly suitable for the dyeing and printing of paper, after dissolution in water.

Inventors: Stawitz; Josef-Walter (Odenthal, DE)

Assignee: Bayer Aktiengesellschaft

International Classification: C09B 67/00 (20060101); C09D 11/00 (20060101); D21H 21/28 (20060101); D21H 21/14 (20060101); C09B 067/22 (); C08K 005/34 ()

Expiration Date: 06/26/2018