2 results about "Pigment molecule" patented technology

The application provides a triarylmethane derivative, a pigment dispersion liquid, a preparation method thereof and a photoresist, and relates to the field of photoresists. The structural general formula of the triarylmethane derivative is: wherein X1 is selected from one of long-chain alkyl groups with a length of C1-C12, X2 is selected from hydrogen or an alkyl group, X3 is selected from one of H, an alkyl group and an aromatic group, and Q is selected from one of a carboxyl group, a sulfonic acid group and a phosphoric acid group. The triarylmethane derivative can generate strong van der Waals force and pi-pi conjugation effect with pigment molecules in a colorant by virtue of the large-plane conjugated triarylmethane skeleton, so as to be firmly anchored on the surface of the pigment particles; the strong polar functional groups such as the sulfonic acid group in the molecular structure of the triarylmethane derivative are combined with the alkaline dispersant, the side long-chain alkyl groups fully act on the dispersion medium, and the re-aggregation of the nano pigment particles is effectively prevented through strong steric hindrance and electrostatic stabilization mechanism, so that the problem of poor dispersion stability is solved.

This invention discloses a high-transparency core-shell composite pigment yellow 74, its preparation method, and its applications. Using nano-silica hollow microspheres as nucleating agents and structural carriers, a heterogeneous nucleation-in-situ coating mechanism is employed. During the coupling reaction stage, pigment molecules generated by diazonium salt coupling are induced to grow directionally and densely coat the microsphere surface, forming a stable core-shell structure with inorganic hollow spheres as the core and organic pigments as the shell. This invention significantly improves pigment utilization and transparency while maintaining a relatively unchanged hue, meeting the requirements for color stability in high-end applications. No organic dispersants or surfactants are added throughout the reaction process. The pigment particle size refinement and high transparency are achieved through structural design rather than additive modification, avoiding the defects caused by dispersant residues, such as poor system compatibility, reduced weather resistance, and increased production costs.