High-settling-resistant and high-color depth pigment nanocapsule coating as well as preparation method and application

Abstract

The invention discloses a high-settling-resistant and high-color depth pigment nanocapsule coating which has good settling resistance. The invention further discloses a preparation method of the high-settling-resistant and high-color depth pigment nanocapsule coating. The preparation method comprises the following steps: putting a great deal of low-density inert volatile decamethylcyclopentasiloxane or octamethylcyclotetrasiloxane into an acrylic monomer, and carrying out nano capsulation treatment on an organic pigment through fine emulsion polymerization, thereby obtaining a uniform and stable nano capsule coating. The coating is green and environmental-friendly in preparation process, easy in raw material obtaining, simple in process and high in color coating efficiency. The invention further provides application of the pigment nanocapsule coating to fabric coating printing, a dark fabric of which a K / S value is greater than or equal to 25 can be made, the air permeability retentionrate of the printed fabric is greater than 70%, the stiffness amplification of the printed fabric is less than 30%, the dry / wet friction resistance solidness of the printed fabric is greater than orequal to grade 4, and the objective hand feeling grade of the printed fabric is greater than or equal to 4.

Description

technical field [0001] The invention relates to the technical field of pigment capsule coatings in fine chemical industry, in particular to the preparation and application of in-situ fine emulsion polymerization of pigment nanocapsule coatings with high anti-sedimentation and high color depth. Background technique [0002] Pigment printing is to use the principle of adhesive to form a film on the surface of the fabric. With the help of the adhesive effect of the adhesive, the colorant particles that have no affinity and reactivity to the fabric are adhered to the fabric to obtain the desired coloring effect. technology. This coloring principle makes it widely applicable to fabrics, especially for the coloring of a large number of blended fabrics without selectivity, which can greatly simplify the coloring process and improve the authenticity rate and processing speed of processed products. [0003] The nano-encapsulation of pigments can pre-coat the binder polymer on the su...

AI Technical Summary

Problems solved by technology

More importantly, the polymer on the surface of the pigment capsules has a strong adhesion ability. Once the pigment capsules collide, they are easy to gather into blocks and "caking" occurs, which is not conducive to the stability of the system.

At present, for this type of problem, the common solution in industry is to add a large amount of emulsifier and dispersant, but the actual situation shows that even if a large amount of emulsifier and dispersant are added in the emulsion, it cannot be kept for a long time without sedimentation, and Once the pigment capsules settle to the bottom of the container, the polymers on the surface of the capsules will bond to form irreversible aggregates, seriously affecting the quality of the paint

[0005] It is difficult to make dark fabrics mainly because the pigment capsules prepared by in-situ miniemulsion polymerization, too much organic pigment will cause the original pigment / monomer dispersion to gel and cannot be prepared by miniemulsion polymerization

At present, studies have shown that the mass fraction of organic pigments in the pigment capsule film is difficult to exceed 12%, and the total amount of paint used by pigment capsules in pigment printing is usually small. At the same time, it is difficult to ensure the color depth and brightness

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