Dyestuff solutions, their preparation and their use for dyeing paper

US4282000A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Manfred Groll · Leverkusen, DE
• Friedhelm Muller · Odenthal, DE

Key dates

• Filing date: Jan 25, 1980
• Grant date: Aug 4, 1981
• Expiry date: Jan 25, 2000

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S8/919
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Aqueous solutions of copper phthalocyanine-sulphonic acid salts of the formula ##STR1## in which Cu--Pc a copper phthalocyanine radical, PA0 m a number from 1.8 to 3.0, PA0 q a number from 1.0 to 2.0, with the proviso that the sum m+q is a number from 2.8 to 4.0, and PA0 M.sup..sym. a mixture of A.sub.n.sup..sym. and an ammonium ion of the formula ##STR2## wherein A.sup..sym. represents an alkali metal ion or NH.sub.4 ion, PA0 n represents a number from 0.8 to 2.0, PA0 m has the meaning indicated above, PA0 R.sub.1 and R.sub.2 designate hydrogen, C.sub.1 --C.sub.4 --alkyl or a radical --(CH.sub.2 --CH.sub.2 --O).sub.p --H and PA0 R.sub.3 designates the radical --(CH.sub.2 --CH.sub.2 --O).sub.p --H, wherein PA0 p is 1, 2, 3, 4, 5 or 6, process for the preparation of these solutions and their use for dyeing paper.