Method for preparing nano pigment water-borne dispersion

A water-based dispersion and colorant technology, applied in organic dyes, pigment slurries, pharmaceutical formulations, etc., can solve problems such as lack of particle size distribution and color properties research, and achieve motion/migration inhibition and blocking, firm bonding, reducing The effect of free volume

Inactive Publication Date: 2007-06-13
SHANGHAI JIAO TONG UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

Their methods mainly focus on how to improve the retention stability and light stability of dyes in latex p

Method used

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  • Method for preparing nano pigment water-borne dispersion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Modified miniemulsion polymerization:

[0028] 0.65g sodium lauryl sulfate and 0.1g part of pH regulator sodium bicarbonate are dissolved in a beaker with 100g deionized water as the water phase; 16g styrene, 2g Methyl methacrylate and 1.9g of crosslinking agent divinylbenzene were added to another beaker, and then 1.3g of C.I. Solvent Red 168, 0.16g of droplet nucleation accelerator and 0.08g of reactive hindered amine light stabilizer were added GW-628, completely dissolved and used as the oil phase; pour the water phase into the oil phase, mechanically stir at 1200 rpm at room temperature for 20 minutes, and then finely emulsify in an ultrasonic homogenizer under an ice-water bath , the ultrasonic power is 450 watts, and the fine emulsion is obtained after 15 minutes of fine emulsification; the prepared fine emulsion is put into a 250ml four-necked flask connected with stirring, a thermometer, a condenser tube and a nitrogen pipe, and nitrogen gas is introduced f...

Embodiment 2

[0033] According to Example 1, the oil phase in the miniemulsion polymerization was changed to 2g of C.I. Solvent Yellow 163, and the rest of the formulations and processes were the same.

[0034] Finally obtain 137g of yellow nano pigment aqueous dispersion, wherein solid content is 18.5wt.%; Show excellent aqueous dispersion properties (see table 1), compare corresponding dyestuff and have greatly improved light fastness / weather property (see table 2 ); from the comparison of the absorbance in the UV-Vis spectrum of Fig. 1 (see curve 2 in Fig. 1 and curve 5 in Fig. 1), it can be known that the dyestuff in the nano-color material particle has excellent binding fastness.

Embodiment 3

[0036] According to Example 1, the oil phase in the miniemulsion polymerization was changed to 0.8g C.I. Solvent Green 28, and the rest of the formula and process were the same.

[0037] Finally obtain 135.7g of green nano-pigment aqueous dispersion, wherein solid content is 17.8wt.%; Show excellent aqueous dispersion property (see table 1), relatively corresponding dyestuff has the light fastness / weather property that greatly promotes (see table 2).

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Abstract

This invention discloses a kind of aqueous dispersion of the nano pigment and its preparation method. The said method is fixing the hydrophobic colorant fully dissolved in polymer monomers into the nano microballoons of the cross linking polymers at the molecule-separate and colorant-aggregative-phase state by using the modified polyreaction in fine latex to obtain the seeds of prepolymerization, then constructing a modified and protective cross linking encloser of the polymer by the enveloping polyreaction, and finally making the nano pigment grains stably disperse in the water medium dissolved with the surface activating agent at a low concentration. The invented aqueous dispersion of the nano pigment is suitable for aqueous ink-jet color marking ink in high performance and color-screened distemper pieces used for making liquid crystal display devices. It can also be applied in pigmentation of the coatings, pigment materials of the high-end cosmetics and so on.

Description

technical field [0001] The invention relates to a method for preparing a color material, in particular to a method for preparing a nano color material aqueous dispersion. The nano-pigment water-based dispersion is suitable for high-performance water-based color inkjet printing inks and color pastes for making color filters for liquid crystal displays. In addition, it can also be used for paint coloring and high-end cosmetic colorants. Background technique [0002] In a broad sense, pigment particles smaller than 100nm in scale, composites of dyes or pigments and their dispersion systems can be called nanocolorants. The characteristics of the nano pigments of the present invention are: they are significantly different from the nano pigments (nanopigments) obtained by physical methods such as mechanical grinding, ultrafine pulverization or gas phase method. In terms of system structure, this type of nano-colorant is a type of nano-composite that combines hydrophobic dyes as c...

Claims

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Application Information

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IPC IPC(8): C09B69/10C09B67/46C09D17/00A61K8/04A61Q1/02
Inventor 胡振锟张青薛敏钊盛巧蓉刘燕刚
Owner SHANGHAI JIAO TONG UNIV
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