Basic titanium sol dye-fixing agent as well as preparation method and application thereof

Abstract

The invention provides a basic titanium sol dye-fixing agent. The basic titanium sol dye-fixing agent is prepared through sol-gel reaction on butyl titanate, water, alcohol, a catalyst and a silane coupling agent serving as raw materials according to a molar ratio of (1 to 3) to (8 to 16) to (18 to 25) to (2.0 to 3.5) to (0.001 to 0.01). The invention also provides a preparation method of the basic titanium sol dye-fixing agent. The basic titanium sol dye-fixing agent and the preparation method of the basic titanium sol dye-fixing agent disclosed by the invention have the advantages that the colour fastness to light of woods can be obviously improved.

Description

technical field [0001] The invention relates to the technical field of color fixing agents, in particular to an alkaline titanium sol color fixing agent and its preparation method and application. Background technique [0002] Under the action of the concentration gradient of the dye solution and the capillary force of the wood, the reactive dye diffuses into the interior of the wood along the wood vessels and pits until it reaches equilibrium. At this time, the reactive dye is combined with the wood fiber through the van der Waals force, and the force is weak, and it adheres to the surface and interior of the wood. The reactive dyes may fade, which makes the color fastness and color fastness of wood poor, especially the color fastness to rubbing, washing and light. In order to solve the problem of poor color fixation and color fastness of reactive dyes on wood, the reactive groups of reactive dyes and the cellulose in wood fibers can be made under alkaline conditions by uti...

AI Technical Summary

Problems solved by technology

[0003] Although the traditional color fixing agent soda ash can improve the color fastness of wood, its strong alkalinity will hydrolyze 20-40% of reactive dyes, reducing the probability of reactive dyes reacting with wood fibers to form covalent bonds; Dyes are easily adsorbed on the surface of wood to form multi-layered associations, which hinder the further adsorption and diffusion of dye molecules, resulting in floating colors, which not only make the color fixation rate and color fastness not much improved, but also increase water consumption and Environmental pollution; at the same time, adding a large amount of soda ash makes the printing and dyeing wastewater contain a large amount of inorganic salts, which intensifies the difficulty of biological treatment of printing and dyeing wastewater

Chinese patent CN104589444B discloses a preparation method of alkaline silica sol color fixing agent. Although the color fixing rate, soaping resistance and color fastness to rubbing have been improved, the color fastness to light has not been effectively improved. It is easy to cause fading and affect the service life of stained wood

Images