Coating composition dispersion, aqueous composite-particle dispersion, and process for producing aqueous composite-particle dispersion

A technology for water-based composite particles and coating compositions, which can be used in coatings, latex paints, etc., and can solve the problems of poor dispersion stability and cohesion of mixed compounds.

Inactive Publication Date: 2019-04-02
ASAHI KASEI KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] However, this composition has the problem that the dispersion stability of the mixed complex is very poor, and aggregation occurs during storage.

Method used

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  • Coating composition dispersion, aqueous composite-particle dispersion, and process for producing aqueous composite-particle dispersion
  • Coating composition dispersion, aqueous composite-particle dispersion, and process for producing aqueous composite-particle dispersion
  • Coating composition dispersion, aqueous composite-particle dispersion, and process for producing aqueous composite-particle dispersion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～13

[0533] [Examples 1-13] [Comparative Examples 1-3]

[0534] The measurement methods and raw materials used in Examples and Comparative Examples are shown below.

[0535] [Quantitative Analysis Method of Mass of Phosphorus Atoms Relative to Total Mass of Composite Particles]

[0536] Quantification of phosphorus atoms relative to the total mass of composite particles is carried out by dialyzing a desired latex sample while maintaining alkalinity, followed by freeze-drying, and performing ICP emission analysis on the obtained sample. .

[0537] The detailed procedure is as follows.

[0538] (1) Dialysis and drying of latex samples

[0539] Dilute the aqueous composite particle dispersion with 0.001 equivalent NaOH (1.0mM NaOH aqueous solution) to 20 times, and filter it on multiple ultrafiltration membranes (Vivaspin 6, molecular weight cut-off: 100,000 (100K), membrane material: PES, manufactured by Sartorius StedimBiotech Gmbh) An appropriate volume of the diluted aqueous c...

Synthetic example 1

[0652] [Synthesis Example 1 (Synthesis of High Molecular Polymer Particles (A))]

[0653] Aquaron (registered trademark) KH-10 (polyoxyethylene-1-(alkyloxymethyl) with concentration adjusted to 15% by mass was added to a reaction vessel equipped with a stirrer, a reflux cooler, a dropping tank, and a thermometer. Base) Alkyl ether ammonium sulfate, manufactured by Daiichi Kogyo Sangyaku Co., Ltd.) 40 g, the temperature in the reaction vessel was raised to 78° C. under a nitrogen atmosphere, and then 15 g of a 2% aqueous solution of ammonium persulfate was added.

[0654] After 5 minutes, a mixture of the following substances, 50 g of 2% aqueous solution of ammonium persulfate and 700 g of ion-exchanged water was flowed into the reactor for 180 minutes: 185 g of methyl methacrylate, 300 g of cyclohexyl methacrylate, methacrylic acid Butyl 200g, 2-ethylhexyl acrylate 250g, 2-hydroxyethyl methacrylate 50g, methacrylic acid 10g, acrylic acid 5g, PPME (2-methacryloxyethyl phosphate...

Embodiment 1

[0659] After adjusting the aqueous dispersion of the high molecular polymer particle (A) of the above [Synthesis Example 1] to pH 9.5 with ammonia, water was added to adjust the concentration to 40.0% by mass, and 250.0 g of it was dropped into a reflux cooler, dripping In the reactor of the liquid tank, the thermometer and the stirring device, the temperature was raised to 60°C.

[0660] Aquaron (registered trademark) KH-10 (30 g) adjusted to a concentration of 10% by mass was slowly added thereto.

[0661] After raising the temperature of the dispersion in the reactor to 70° C. under a nitrogen atmosphere, 45 g of ammonium persulfate (2% aqueous solution) was added.

[0662] After 5 minutes, 3.2 g of methyl methacrylate, 4.8 g of cyclohexyl methacrylate, 7.76 g of butyl acrylate and PPME (methacryloyloxy ethyl phosphate, Toho Chemical Industry Co., Ltd.) 0.24g, Neopelex (registered trademark) G-15 (aqueous solution of sodium dodecylbenzenesulfonate, manufactured by Kao Corp...

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Abstract

A coating composition dispersion that comprises: at least one aqueous composite-particle dispersion (C) which comprises an aqueous medium comprising water and composite particles dispersed in the aqueous medium, the composite particles comprising particles (A) and a polymer layer (B) which covers at least some of the surface of the particles (A) and containing phosphorus atoms in an amount of 0.12mass% or smaller with respect to the total mass of the composite particles; and an aqueous resin dispersion (D). In the coating composition dispersion, the solid mass ratio of the aqueous composite-particle dispersion (C) to the aqueous resin dispersion (D) is (solid mass of component (C)) / (solid mass of component (D)) = 100 / 0 to 1 / 99. The coating composition dispersion has a weatherability improvement value represented by the expression [the absolute value of (Delta b0- Delta b)] / ( Delta b0+ Delta b) of 0.15 or higher, wherein Delta b is the color difference of a coating film formed from thecoating composition dispersion and Delta b0 is the color difference of a coating film formed from the aqueous resin dispersion (D).

Description

technical field [0001] The present invention relates to coating composition dispersions, aqueous composite particle dispersions and methods for their manufacture. Background technique [0002] In recent years, water-based composite particle dispersions, that is, water-based paints obtained from latex, have attracted attention in the coating field as materials for switching from organic solvent-based to water-based materials. [0003] However, compared with organic solvent-based paints, water-based coating materials obtained from aqueous composite particle dispersions have the problem of not yet showing sufficient physical properties in terms of pigment dispersibility, water resistance, stain resistance, and hardness. [0004] Here, the aqueous composite particle dispersion refers to a liquid in which a polymer is dissolved and / or dispersed in water. [0005] Conventionally, in the field of aqueous composite particle dispersions, techniques for introducing various functional...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D201/00C08F2/22C09D5/02C09D133/00C09D157/04C09D157/06
CPCC08F2/22C09D5/02C09D157/06C08F220/1806C08F265/06C08F285/00C09D151/003C08F220/1804C08F220/1808C08F220/14C08F220/20C08F220/06C08F212/30C08F230/02C08F220/34C08F220/56C08F216/1491C08F220/36C09D133/00C09D157/04C09D201/00C09D5/00C09D133/062C09D133/066
Inventor 山内丰昭佐佐木惠吉沼伦春
Owner ASAHI KASEI KK
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