Storage-stable solution of a copper phthalocyanine reactive dyestuff
AssigneeBayer Aktiengesellschaft
InventorsJoachim Wolff, Karlheinz Wolf
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Abstract
A new storage-stable solution of the reactive dyestuff of the formula ##STR1## wherein CuPc=the radical of a Cu phthalocyanine dyestuff, m=1, 2 or 3, n=1, 2 or 3, m+n=3 to 4 and M.sup..sym. =H.sup..sym., an alkali metal cation or an ammonium ion, is provided. The storage-stable solution according to the invention is characterized in that it contains 10-35% by weight of reactive dyestuff (1), 10-30% by weight of solubilizing agent, 0-10% by weight of anionic dispersing agent, 0-7% by weight of inorganic salts, such as Na.sub.2 SO.sub.4, Li.sub.2 SO.sub.4 and the like, and 0.1-3% by weight of buffer (pH 4-7), the remainder to make up to 100% by weight being water.
Claims7
Aqueous solution of the reactive dyestuff of the formula ##STR4## wherein CuPc=the radical of a Cu phthalocyanine dyestuff,
- m=1, 2 or 3,
- n=1, 2 or 3,
- m+n=3 to 4 and
- M.sym.=H.sym., an alkali metal cation or an ammonium ion, containing 10-35% by weight of reactive dyestuff (1), 10-30% by weight of solubilising agent selected from lower aliphatic or cyclic amides, N-alkylpyrrolidones, N-vinylpyrrolidones or polymers thereof, aliphatic sulphoxides, dimethylsulphone, diethylsulphone, thiourea and urea and the associated derivatives.
- - 10% by weight of anionic dispersing agent,
- 0-7% by weight of inorganic salt and
- 0.1-3% by weight of buffer (ph 4-7).
Dependencies are inferred from the claim text.