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A method for regulating the particle size of microcapsule pigments

A technology of microcapsules and microcapsule wall materials, applied in the field of pigments, to achieve the effect of easy realization, narrow distribution range and small particle size

Active Publication Date: 2017-10-31
HUAWEI TEHCHNOLOGIES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem mainly solved by the present invention is to provide a method for regulating the particle size of microcapsule pigments, which can effectively control the dispersion stability of pigments, improve the controllability of the particle size of polymerization products, and solve the problems existing in the preparation of microcapsule pigments by suspension polymerization. Inadequacies

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1)) Preparation of pigment pre-dispersion: Add organic pigment, microcapsule wall material monomer and dispersant I into the ball mill at a mass ratio of 1:6:5, and grind for 5 hours at a speed of 20r / min to obtain a uniform slurry , which is the pigment pre-dispersion; wherein, the microcapsule wall material monomer includes styrene, butyl acrylate and methacrylic acid with a mass ratio of 2:1.5:0.2; the dispersant I has a concentration of 0.05mol / The aqueous solution of sodium tetradecylbenzenesulfonate of L;

[0024] (2) Pre-polymerization reaction: Add 2,2′-azobisisobutyronitrile, an initiator accounting for 1% of the mass of the microcapsule wall material monomer, to the pigment pre-dispersion liquid obtained in step (1), and stir and mix well , heating to 45-50°C, and pre-polymerizing for 30-40 minutes under stirring to obtain a pre-polymerized product;

[0025] (3) Homogenization treatment: add dispersant II (magnesium hydroxide and tricalcium phosphate at a r...

Embodiment 2

[0029] (1)) Preparation of pigment pre-dispersion: add organic pigment, microcapsule wall material monomer and dispersant I into the ball mill at a mass ratio of 1:8:10, and grind for 3 hours at a speed of 50r / min to obtain a uniform slurry , which is the pigment pre-dispersion liquid; wherein, the microcapsule wall material monomer comprises styrene, butyl acrylate and methacrylic acid with a mass ratio of 2:1.5:0.3; the dispersant I is a concentration of 0.5mol / The aqueous solution of sodium cetylbenzenesulfonate of L;

[0030] (2) Pre-polymerization reaction: Add 2,2′-azobisisobutyronitrile, an initiator accounting for 1% of the mass of the microcapsule wall material monomer, to the pigment pre-dispersion liquid obtained in step (1), and stir and mix well , heating to 45-50°C, and pre-polymerizing for 30-40 minutes under stirring to obtain a pre-polymerized product;

[0031] (3) Homogenization treatment: add dispersant II (magnesium hydroxide and tricalcium phosphate at a...

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Abstract

The invention discloses a method for regulating the particle size of a microcapsule pigment, which comprises the following steps: (1) preparing a pigment pre-dispersion liquid; (2) pre-polymerization; (3) homogenization treatment; (4) polymerization; ( 5) Separation of products. A method for regulating the particle size of microcapsule pigments in the present invention is simple to operate and easy to realize. It can effectively control the dispersion stability of pigments through the selection and use of dispersants, combined with pre-polymerization, homogenization treatment and polymerization steps. , and improve the controllability of the particle size of the polymerization product, the prepared microcapsule pigment has a small particle size and a narrow distribution range, thereby improving the stability and application performance of the pigment.

Description

technical field [0001] The invention relates to the field of pigments, in particular to a method for regulating the particle size of microcapsule pigments. Background technique [0002] Organic pigments not only have many varieties, complete color spectrum, and bright colors, but also have excellent durability, heat resistance and other application properties, which meet the requirements of high-grade coatings, plastics and high-grade printing inks. However, organic pigments have low surface polarity, strong lipophilicity, and are difficult to wet and disperse in the water phase, making them prone to aggregation during application and affecting performance. [0003] In recent years, experts and scholars at home and abroad have used methods such as microemulsion polymerization, emulsion polymerization, miniemulsion polymerization, and suspension polymerization to efficiently and stably coat organic pigments in polymer particles to prepare corresponding organic pigment microca...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F212/08C08F220/18C08F220/06C08F2/18C08F2/44B01J13/14
Inventor 范建平
Owner HUAWEI TEHCHNOLOGIES CO LTD
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