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Resin particle aggregate, method for manufacturing same and application of same

一种树脂粒子、聚集体的技术，应用在涂层等方向，能够解决树脂粒子易扬起、难处理、流动性差等问题，达到良好柔焦效果的效果

Active Publication Date: 2014-05-07
SEKISUI PLASTICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, resin particles with a smaller particle size are more difficult to handle due to easy dust generation, poor fluidity, etc.
Therefore, at present, a plurality of resin particles are aggregated (aggregated) into resin particle aggregates by using spray drying or the like to facilitate handling.

Method used

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  • Resin particle aggregate, method for manufacturing same and application of same
  • Resin particle aggregate, method for manufacturing same and application of same
  • Resin particle aggregate, method for manufacturing same and application of same

Examples

Experimental program
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Effect test

Embodiment approach ）

[0049] (resin particle aggregates)

[0050] The resin particle aggregate of the present invention is a resin particle aggregate formed by aggregating (aggregating) a plurality of resin particles (primary particles) composed of polymers of vinyl monomers, and comprising 100 parts by mass of the resin particles With 1 to 5 parts by mass of surfactant, the resin particles are crosslinked by 9 to 50 mass % of crosslinkable monomers relative to the total mass of the resin particles, and the inorganic components in the aggregates of the resin particles The content is 0.5% by mass or less; the ratio of the volume average particle diameter D2 of the particles contained in the dispersion liquid obtained by dispersing the resin particle aggregates in water to the volume average particle diameter D1 of the resin particles D2 / D1 is 15 or less. Here, the volume average particle diameter D2 is measured by the following measurement method: 0.50 g of the resin particle aggregate is mixed wit...

Embodiment ）

[0124] Hereinafter, although an Example and a comparative example demonstrate this invention, this invention is not limited to these.

[0125] (Measurement method of mass average molecular weight of seed particles)

[0126] The mass average molecular weight of the seed particles is measured using gel permeation chromatography (GPC; Gel Permeation Chromatography). The measured mass average molecular weight is the equivalent mass average molecular weight of polystyrene (PS). The measurement method is as follows. First, 50 mg of a sample was dissolved in 10 ml of tetrahydrofuran (THF). The resulting solution was filtered through a 0.45 μm non-aqueous chromato disc. The obtained filtrate was analyzed by GPC, and the PS conversion mass average molecular weight was measured. The measurement conditions of GPC are as follows.

[0127] GPC apparatus: Trade name "Gel Permeation Chromatograph HLC-8020" manufactured by TOSOH Co., Ltd.

[0128] Column: 2 pieces of "TSKgel GMH XL-L" (...

Embodiment 1）

[0153] (Manufacture of seed particles)

[0154] First, 250 g of methyl methacrylate as a monofunctional vinylic monomer (first vinylic monomer) and 5 g of n-octyl mercaptan as a chain transfer agent were mixed to prepare 255 g of a monomer mixture. Furthermore, 1.5 g of potassium persulfate as a polymerization initiator was dissolved in 18.5 g of deionized water as an aqueous medium to obtain 20 g of an aqueous potassium persulfate solution.

[0155] Thereafter, 1000 g of deionized water as an aqueous medium was put into a polymerizer equipped with a stirrer and a thermometer, and 255 g of the monomer mixture was supplied to the polymerizer. Then, while stirring the contents of the polymerizer with the stirrer, the air in the polymerizer was replaced with nitrogen, and the internal temperature of the polymerizer was raised to 70°C. Furthermore, after continuing the stirring, while maintaining the internal temperature of the polymerizer at 70° C., 20 g of the aqueous potassium...

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Abstract

The present invention relates to a resin particle aggregate which is formed by a plurality of resin particles formed of vinyl monomer polymers. The present invention contains 100 parts by mass of the resin particle, and 1 to 5 parts by mass of a surfactant. The resin particle is cross-linked by a cross-linkable monomer of 10 to 50 wt% with respect to all mass of the resin particle. The content of an inorganic component in the resin particle aggregate is 0.5 wt% or less, and a ratio (D2 / D1) of a volume average particle diameter (D2) of a particle which is contained in a dispersive liquid, which is the resin particle aggregate dispersed in water, to a volume average particle diameter (D1) of the resin particle is 15 or less.

Description

technical field [0001] The present invention relates to a resin particle aggregate formed by aggregating a plurality of resin particles composed of polymers of vinyl monomers, for example, constituting a light diffuser plate used as a component of a liquid crystal display device, Resin particle aggregates that can be suitably used as light diffusing agents for light diffusing members such as optical films (antiglare films, light diffusing films, etc.) and lighting covers, their production methods, and uses (light diffusing resin composition, coating composition, optical film and external preparation). Background technique [0002] So far, acrylic cross-linked resin particles or styrene-based cross-linked resin particles have been widely used as light diffusing agents formulated in light diffusing members such as lighting housings, light diffusing films and light diffusing plates of liquid crystal display devices; coatings Use a matting agent, etc. In order to make such res...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L57/00C08F2/18C08L25/00C08L33/06
CPCC08F2/18C08F2/22C08F212/08C08F212/36C08L33/08C08L2312/00C09D125/06C09D133/08C09D133/12C08L25/06C08L33/12
Inventor 寺本健三
Owner SEKISUI PLASTICS CO LTD
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