Preparation of pigment particle agglutination dispersion, resin composition and color filter

Abstract

The invention provides a method of producing easily filtered agglutinin; wherein, for the procedure of producing temporary aqueous paste adopting purging operation as the represent when the organic nanoparticle aqueous dispersant is phase changed to form organic nanoparticle non-aqueous dispersant (that is: the procedure of adopting filter to need waste a lot of time), the invention converts the nanoparticle in the organic nanoparticle aqueous dispersant into easily filtered agglutinin. The invention provides a method of producing organic nanometer dye particle agglutinin; wherein the organic nanometer dye particle dispersed in the aqueous medium acts with at least an organic low molecular compound with molecular weight less than 1000 and at least an organic high molecular compound with weight average molar mass more than 1000 to agglutinate the organic nanometer dye particle and then separate.

Description

technical field [0001] The invention relates to a preparation method for phase-transferring an aqueous dispersion of organic nano-pigment particles into a non-aqueous medium to obtain a non-aqueous dispersion of organic nano-pigment particles. More specifically, the present invention relates to a method of converting organic nanopigment particles in an aqueous dispersion of organic nanopigment particles, which has been difficult to filter, into easily filterable aggregates, and separating the aggregates through a filtration operation , and redisperse it in a non-aqueous medium to obtain a non-aqueous dispersion of organic nano-pigment particles. Background technique [0002] In recent years, studies on particle size reduction have been underway. In particular, the purpose of research is to reduce the particle size to a nanometer size (for example, in the range of 10 nm to 100 nm), which is difficult to produce by pulverization, precipitation, and the like. In addition, the...

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Problems solved by technology

Therefore, there is such a disadvantage that even if the nanoparticles can be dispersed under high concentration conditions, a large amount of dispersing aid must be used, so when the viscosity is low such as inkjet ink, and the content rate of the polymer compound is extremely low In the case of , these techniques are difficult to directly apply

But, when adopting this method, there is such problem: because in this method, water-based particle will go through such form that agglomerates strongly at once, so the efficiency that pigment is surrounded by resin deteriorates, and it is difficult to redisperse (for example, See Patent Documents 7 to 8, etc.)

In addition, when using such a method, in order to make a water-based paste, it is necessary to filter the water-based nano-pigment particles directly with a filter in the state of primary particles or filter with a filter in an aggregated state, but this method exists such The problem: it takes a lot of time to filter, which is very inefficient in industry, and the operation is very complicated

However, the method described in Non-Patent Document 2 is limited to low-concentration inorganic particles, organic pigments are not mentioned in Non-Patent Document 2, and the final dispersion medium is a non-volatile ionic liquid, so Non-Patent Document 2 The method described in 2 is not suitable for industrial use

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