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Water-based coating composition, coating film, and coated article

A technology of water-based coatings and compositions, applied in the direction of coatings, latex paints, etc., can solve the problems of water resistance reduction and achieve excellent water resistance

Inactive Publication Date: 2020-11-20
DAI NIPPON TORYO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] Therefore, although it is considered that avoiding the use of the odor component itself is the most reliable solution, for example, as described in Patent Document 1, when sodium hydroxide or the like is used instead of ammonia as the neutralizing agent used in the preparation of the emulsion, there may be The problem of reduced water resistance

Method used

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  • Water-based coating composition, coating film, and coated article
  • Water-based coating composition, coating film, and coated article
  • Water-based coating composition, coating film, and coated article

Examples

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Embodiment

[0131] Hereinafter, although an Example is given and this invention is demonstrated in more detail, this invention is not limited at all by the following Example.

Synthetic example 1

[0133] In a 5-neck flask equipped with a stirrer, reflux condenser, thermometer, dropping device and nitrogen inlet pipe, add 200 parts by mass of ion-exchanged water and 6.0 parts by mass of non-reactive emulsifier a, while purging the reactor with nitrogen For replacement, after raising the temperature to 80°C, 1.0 parts by mass of potassium persulfate was added, and then, 190 parts by mass of methyl methacrylate and 250 parts by mass of butyl acrylate, which had been stirred and mixed in another container in advance, were added dropwise over 3.5 hours. parts, 10 parts by mass of acrylic acid, 220 parts by mass of ion-exchanged water, and 30.0 parts by mass of non-reactive emulsifier a. Then, after aging at 80° C. for 2 hours while continuing to stir, a mixture of 2.7 parts by mass of ion-exchanged water and 0.3 parts by mass of a 70% aqueous solution of tert-butyl hydroperoxide was added to the reactor, and then continuously dripped over 5 minutes. A mixture of 9.7 parts by...

Embodiment 1

[0150] Put 6.5 parts by mass of ion-exchanged water into the mixer, slowly add 1.0 parts by mass of dispersant, 0.2 parts by mass of antifoaming agent, and 20.0 parts by mass of titanium oxide under stirring environment, and mix until the particle size reaches 50 μm or less after the addition is complete. Next, 70.0 parts by mass of the resin dispersion of Synthesis Example 4, 2.0 parts by mass of a viscosity modifier, and 0.3 parts by mass of an antifoaming agent were slowly added to the mixer under stirring environment, and after thorough mixing, the water-based coating composition of Example 1 was obtained.

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Abstract

The present invention relates to a water-based coating composition that exhibits an excellent water resistance even with the use of an odorless neutralizing agent or a neutralizing agent resistant toodor generation. The present invention more particularly relates to a water-based coating composition comprising: an acrylic resin containing a constituent unit derived from a reactive emulsifier; anda neutralizing agent selected from the group consisting of alkaline organic compounds having a boiling point higher than 260 deg C and alkaline inorganic compounds excluding ammonia, the water-basedcoating composition being characterized in that the acrylic resin is dispersed in the state of an emulsion in the water-based coating composition.

Description

technical field [0001] The present invention relates to a water-based coating composition, a coating film obtained from the water-based coating composition, and a coated article having the coating film, and particularly relates to the use of an odorless neutralizing agent or a neutralizing agent that is less likely to cause odor A water-based coating composition that is excellent in water resistance even in the case of Background technique [0002] In recent years, interior and exterior architectural coatings, especially interior coatings, have been required to switch from solvent-based coatings to water-based coatings from the viewpoint of air pollution, odor, and safety. Water-based paints with water-based emulsions as binders occupy the mainstream. However, a small amount of volatile organic compounds (VOCs) contained in water-based paints still remains as a problem of odor, and further reduction thereof is strongly demanded. [0003] Aqueous emulsions and paints using ...

Claims

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Application Information

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IPC IPC(8): C09D5/02C09D133/00C09D7/61C09D7/63
CPCC09D7/61C09D7/63C09D5/02C09D133/00
Inventor 中野裕太斋藤磨美早川哲平大川峻平镰田由佳常盘勇斗高久优太八木泽隼
Owner DAI NIPPON TORYO CO LTD