Aqueous dispersoid of fluorine-containing seed polymer particles and aqueous coating combination

A technology of polymer particles and aqueous dispersions, applied in the direction of coating, etc., can solve the problems of reduced compatibility, phase separation, white turbidity of fluoropolymers, and achieve the effect of excellent compatibility

Active Publication Date: 2014-03-12
DAIKIN IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, if the ratio of the acrylic monomer used for seed polymerization is increased, there is a problem that the compatibility with the fluorine-containing polymer decreases, and phase separation occurs during film formation, resulting in cloudiness.

Method used

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  • Aqueous dispersoid of fluorine-containing seed polymer particles and aqueous coating combination
  • Aqueous dispersoid of fluorine-containing seed polymer particles and aqueous coating combination
  • Aqueous dispersoid of fluorine-containing seed polymer particles and aqueous coating combination

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0111] Add the VdF / TFE / CTFE copolymer (=72.1 / 14.9 / 13 (mol%)) 128.2 parts by mass of an aqueous dispersion (solid content concentration: 46.8% by mass) of particles, 14.3 parts by mass of Newcol 707SF and 85.2 parts by mass of ion-exchanged water were added thereto and mixed well to prepare an aqueous dispersion.

[0112] Next, after heating in a water bath with stirring until the internal temperature reaches 75° C., 88.1 parts by mass of methyl methacrylate (MMA), 49.0 parts by mass of n-butyl acrylate (BA), and 1.5 parts by mass of acrylic acid were continuously added dropwise for 3 hours. (AA), 0.7 parts by mass of a mixed monomer of γ-methacryloxypropyltriethoxysilane, and 22.1 parts by mass of ammonium persulfate (APS) (1 mass % aqueous solution), and polymerization was performed. After the dropwise addition of the mixed monomers was terminated, aging was carried out for another 2 hours. After aging, the reaction solution was cooled to room temperature to terminate the re...

Embodiment 2

[0115] Add the VdF / TFE / CTFE copolymer (=72.1 / 14.9 / 13 (mol%)) 213.5 parts by mass of an aqueous dispersion (solid content concentration: 46.8% by mass) of particles, 14.3 parts by mass of Newcol 707SF and 55.5 parts by mass of ion-exchanged water were added thereto and mixed well to prepare an aqueous dispersion.

[0116] Next, after heating in a water bath with stirring until the internal temperature reaches 75° C., 63.2 parts by mass of methyl methacrylate (MMA), 35.7 parts by mass of n-butyl acrylate (BA), and 1.1 parts by mass of acrylic acid were continuously added dropwise for 3 hours. (AA), 0.5 parts by mass of a mixed monomer of γ-methacryloxypropyltriethoxysilane, and 15.8 parts by mass of ammonium persulfate (APS) (1 mass % aqueous solution), and polymerization was performed. After the dropwise addition of the mixed monomers was terminated, aging was carried out for another 2 hours. After aging, the reaction solution was cooled to room temperature to terminate the re...

Embodiment 3

[0119]In Example 2, as monomers for seed polymerization, 62.2 parts by mass of methyl methacrylate (MMA), 35.7 parts by mass of n-butyl acrylate (BA), 1.1 parts by mass of acrylic acid (AA), 1.0 parts by mass of γ - Except for methacryloxypropyltriethoxysilane, seed polymerization was carried out in the same manner as in Example 2 to obtain an aqueous dispersion of a fluorine-containing seed polymer having a solid content concentration of 51.0% by mass. The obtained fluorine-containing seed polymer had a fluorine content of 29% by mass, a particle diameter of 195 nm, and a minimum film-forming temperature of 52.2°C.

[0120] Using the aqueous dispersion of the fluorine-containing seed polymer, the haze value of the produced film was measured while changing the drying temperature (1 day at 40° C., 10 minutes at 100° C., and 5 minutes at 150° C.). The results are listed in Table 1.

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Abstract

The invention provides an aqueous dispersoid of fluorine-containing seed polymer particles serving as a film formation component for an aqueous coating combination. Although the ratio of acrylic acid ester polymers during seed polymerization is high, the acrylic acid ester polymers are highly compatible with the fluorine-containing polymer serving as seed particles, and can provide transparent films. The invention relates to an aqueous dispersoid of fluorine-containing seed polymer particles and an aqueous coating combination containing the aqueous dispersoid. A fluorine-containing polymer containing at least one fluoro-alkene unit is served as a seed particle and is obtained by polymerization of monomer mixtures containing acrylic acid ester monomers and ethylene monomer containing hydrolyzed monosilane, wherein the content of the acrylic acid ester monomer unit is, by mass, 40-400 parts relative to 100 parts of the fluorine-containing polymer particles, and the content of the ethylene monomer containing hydrolyzed monosilane is by mass, 0.1-2 parts relative to 100 parts of the acrylic acid ester monomer unit.

Description

technical field [0001] The present invention relates to an aqueous dispersion and an aqueous coating composition using fluorine-containing seed polymer particles, wherein, although the proportion of seed-polymerized acrylate polymer is large, the phase of the fluorine-containing polymer as the seed particles is With excellent compatibility, the water-based dispersion and water-based coating composition can provide a transparent coating film. Background technique [0002] Fluorine-containing seed polymers using acrylic monomers as monomers for seed polymerization exhibit chemical resistance, solvent resistance, heat resistance, stain resistance, and processing of acrylic polymers properties, transparency, adhesion, and film-forming properties, and as raw materials for various products, or coating film-forming components of paints, it is used in a wide range of industrial fields such as the automobile industry, the semiconductor industry, the chemical industry, and paints. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/14C08F220/18C08F220/06C08F230/08C08F214/22C08F214/26C08F214/28C08F214/24C09D133/12
Inventor 井本克彦西井秀实长门大岛野真由美福原良成
Owner DAIKIN IND LTD
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