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Hollow particles, production method therefor, and aqueous dispersion containing hollow particles

A hollow, granular technology, applied in the direction of microsphere preparation, microcapsule preparation, nanotechnology for materials and surface science, etc., to achieve excellent heat resistance and dispersibility

Pending Publication Date: 2021-04-30
ZEON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in conventionally known production methods, it is difficult to produce hollow particles with high porosity and excellent heat resistance while controlling the particle diameter.

Method used

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  • Hollow particles, production method therefor, and aqueous dispersion containing hollow particles
  • Hollow particles, production method therefor, and aqueous dispersion containing hollow particles
  • Hollow particles, production method therefor, and aqueous dispersion containing hollow particles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0247]Hereinafter, the present invention will be more specifically described, but the present invention is not limited to these examples. In addition, as long as there is no special instructions, parts and% are quality reference.

[0248]In the present embodiment and the comparative example, the test method performed is as described below.

[0249]1. Manufacture of hollow resin particles

manufacture example 1

[0251](1) Preparation of mixed liquid

[0252]First, the following materials (A1) to (D1) are mixed. The resulting mixture was used as an oil phase.

[0253](A1) 40 parts of methacrylic acid

[0254](B1) 60 parts of dimethylacrylate ethylene glycol

[0255](C1) 2,2'-azo bis (2,4-dimethylanitrile) (oil-soluble polymerization initiator, WAKO Pure Chemicalindustries, Ltd., product name: V-65) 3 copies

[0256](D1) 270 cyclohexane

[0257]Next, 4.0 parts of (E) surfactant was added to 800 parts (F) ion exchange water. The resulting mixture was taken as aqueous phase.

[0258]The mixture was prepared by mixing the aqueous phase and the oil phase.

[0259](2) Suspension

[0260]The mixture was stirred by a in-line emulsified disperser to suspend the suspension of the monomer droplets of the inner coated cyclohexane (the suspension of the inner cyclohexane was prepared.

[0261](3) Polymerization process

[0262]In a nitrogen environment, the suspension was stirred at a temperature condition at 65 ° C for 4 hours, and the...

manufacture example 2～ manufacture example 3

[0267]In the "(1) mixed liquid preparation step of the production example 1, the material is obtained by the same manufacturing method in the same manner as in the formula 1, in addition to the material and the amount of addition, and the addition of the production example 1. According to the observation of the scanning electron microscope and the value of the void ratio, it is confirmed that these particles are spherical and have a hollow portion.

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Abstract

Provided are hollow particles that are light and have better heat resistance and dispersibility than conventional particles, a production method therefor, and an aqueous dispersion containing the hollow particles. The hollow particles are characterized in that: the hollow particles comprise hollow resin particles having surfaces covered with inorganic fine particles; the volume average particle size is 0.1 to 9.0 [MU]m; the porosity is 55 to 95%; repeating units constituting the resin in the hollow resin particles include crosslinkable monomer units and the content of the crosslinkable monomer units is 25 to 100 parts by mass per 100 parts by mass of the resin; the inorganic fine particles have a primary particle size of 10 to 120 nm; and the inorganic fine particles are contained in an amount of 5 to 180 parts by mass relative to 100 parts by mass of the hollow resin particles.

Description

Technical field[0001]The present invention relates to an excellent heat resistance and a conventional hollow particle and a method of manufacturing a method thereof, and a water dispersion comprising the hollow particles.Background technique[0002]The hollow particles can be well scattered in good scattering light, reducing the permeability of light, and therefore an organic pigment excellent in optical properties such as opacity, whiteness, etc., and is widely used in an organic pigment excellent in optical properties such as opacity, whiteness. Purpose of paper coating compositions.[0003]Further, in the use of aqueous coating, paper coating composition, etc., in order to improve the lightness, insulation and opacity of the coating, heat insulation and opacity, etc., it is desirable to increase the void ratio of the added hollow particles. . However, in a conventionally known manufacturing method, it is difficult to control hollow particles having a high void ratio and excellent hea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/22C08F220/10C08J7/04
CPCB01J13/22B01J13/14B01J13/203C08F222/102C08K2003/265C08K2003/2227C08K3/36C08F220/06C08F220/14C08F220/1804C08L35/02C08F220/10C08J7/04B01J13/04B82Y30/00B82Y40/00C08F2/18C08F12/36C08F20/06C08F20/14C08F20/40
Inventor 平田刚矢吹希
Owner ZEON CORP