Sunproof water-soluble dye, method for preparing same and application thereof

Abstract

The invention relates to sunproof water-soluble dye having the general formula (1), a method for preparing the same and application thereof. The sunproof water-soluble dye imports the group of hindered amine 4-Z-2,2,6,6-tetramethylpiperidine and the water-soluble group of sulfonic groups based on the common water-insoluble dye, so that under a condition of ensuring good water solubility of the dye, the light stability of the dye is improved, and the sunproof property of the dye is also improved. In a general formula(1), A represents a dye matrix selected from a group formed by dioxazine dye, anthraquinone dye and phthalocyanine dye which are water-insoluble; R1 represents a general formula(2): -(SO2-R)m(2); R2 represents a general formula(3): -(SO3H)n(3); in the general formula(2) and the general formula(3), m and n are both a natural number, preferably m is a natural number between 1 and 16, and n is a natural number between 0 and 2.

Description

technical field The present invention relates to a light-fast water-soluble dye and its preparation method, in particular to a light-fast water-soluble dye and its preparation method and application. The group hindered amine 4-Z-2,2,6,6-tetramethylpiperidinamine and the water-soluble group sulfonic acid group ensure the good water solubility of the dye and improve its light stability, thereby improving the resistance drying performance. Background technique There are many kinds of direct dyes or reactive dyes, complete chromatogram, bright color, low price, easy to match colors, and simple dyeing or printing methods, but the biggest disadvantage is that most of these dyes have insufficient color fastness and low color fixation rate. The weather resistance is poor, and it is easy to decompose under the action of the external environment, causing the dyed object to fade, etc., which affects the dyeing performance of these dyes. Aiming at the defects of poor color fastness, p...

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Problems solved by technology

There are many kinds of direct dyes or reactive dyes, complete chromatogram, bright color, low price, easy to match colors, and simple dyeing or printing methods, but the biggest disadvantage is that most of these dyes have insufficient c

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