Polycarboxylic acid dye with low polymerization degree
AssigneeDalian University of Technology
InventorsShufen Zhang, Bingtao Tang, Wei Ma
Life of this patent
Estimating the term…
Abstract
The present invention provides a polycarboxylic acid dye with low polymerization degree, which is formed by using a macromolecule skeleton of polymaleic acid linked to an azo chromophore, an azo-metal complexation chromophore or an anthraquinone chromophore via a bridge group of amide or ester bond. The dye is useful for dyeing and printing leather, protein fiber, cellulose fiber and synthetic fiber.
Claims2
A polycarboxylic acid dye with low polymerization degree, characterized in that the dye is a polymerized polycarboxylic acid dye having a macromolecule skeleton of polymaleic acid linked to a chromophore via a bridge group of amide or ester bond, having a structural formula of:
- in formula (1), the structural component A comprises, mainly comprises or consists of the following monomer units which are linked randomly, in block or alternately in arbitrary sequence present with the numbers of n1, n2 and n3:
- wherein each of the structural component A can independently have same or different n1, same or different n2 and/or same or different n3,
- wherein,
- M is H, Na, K or a quaternary ammonium positive ion of formula 1-1:
- in formula 1-1, r1, r2, r3 and r4 are hydrogen, a C1-C12 linear alkyl, or a C1-C12 linear alkenyl, wherein the r1, r2, r3 and r4 can be same or different;
- n1=1-100, preferably 1-20;
- n2=0-100, preferably 0-10;
- n3=1-100, preferably 1-50;
- and n=an integer of 1-10000, preferably 1-1000;
- X=O or NH, linked to a chromophore;
- D is a chromophoric group bearing an azo, azo-metal complexed or anthraquinone structure.
Dependencies are inferred from the claim text.