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Stain resistant matte aqueous coating composition and method for forming stain resistant matte aqueous coated film

A pollution-resistant, water-based coating technology, applied in coatings and other directions, can solve problems such as coating film pollution and achieve excellent weather resistance

Active Publication Date: 2021-11-16
KANSAI PAINT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] According to the coatings described in Patent Documents 2 and 3, they can show a matte appearance and have excellent followability to the substrate. In the case of packaging, there is a problem that the coating film is easily contaminated by long-term exposure. Therefore, it is necessary to develop a water-based matte coating with excellent stain resistance.

Method used

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  • Stain resistant matte aqueous coating composition and method for forming stain resistant matte aqueous coated film
  • Stain resistant matte aqueous coating composition and method for forming stain resistant matte aqueous coated film
  • Stain resistant matte aqueous coating composition and method for forming stain resistant matte aqueous coated film

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Embodiment

[0101] Hereinafter, although an Example demonstrates this invention more concretely, this invention is not limited to these Examples. In addition, "parts" and "%" in the following examples mean "parts by mass" and "% by mass", respectively.

[0102] Manufacture of water-based resin

manufacture example 1

[0104] 350 parts of deionized water and 10 parts of Newcol 707SF (Note 1) were added to a reaction vessel equipped with a thermometer, a thermostat, a stirrer, and a dropping device, stirred and mixed in a nitrogen stream, and the temperature was raised to 85°C. Next, 3% of the pre-emulsion part and 80 parts of 2.5% ammonium persulfate aqueous solution which emulsified the component of the following composition were added in reaction container, and it held at 85 degreeC for 20 minutes.

[0105]

[0106]

[0107] Then, the remaining pre-emulsion and 80 parts of 2.5% ammonium persulfate aqueous solution were dripped in the reaction container over 4 hours, and aging was performed for 2 hours after the dropwise addition was completed. Then, it cooled to 30 degreeC, and adjusted so that the solid content may be 47 % and pH may become 8.0 using ammonia water and deionized water. Next, it discharged|emitted while filtrating with the nylon cloth of 200 meshes, and obtained the w...

manufacture example 2～4

[0110] In said manufacture example 1, except having made the monomer composition into the compounding shown in following Table 1, it synthesize|combined similarly to manufacture example 1, and obtained water-based resin (A-2) - (A-4).

[0111] [Table 1]

[0112]

[0113] Manufacture of White Pigment Component Dispersion Paste

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Abstract

PROBLEM TO BE SOLVED: To provide a matte type aqueous coating composition capable of achieving both of stain resistance and weather resistance for long time and excellent in backing followability, and a method for forming a coated film using the same. SOLUTION: There are provided a stain resistant matte aqueous coating composition containing an aqueous resin (A), a pigment content (B) and a glycol ether compound (C), where glass transition temperature of the aqueous resin (A) is 10 DEG C or more, copolymerization percentage of the aromatic vinyl compound is 40 mass% or less, the pigment content (B) contains a coloring pigment (b1), a flaky loading pigment (b2) and a loading pigment (b3) other than (b2), (b1) is 5 pts.mass or more, (b2) is 50 pts.mass or more, (b3) is 20 pts.mass or more based on 100 pts.mass of the solid content of the aqueous resin (A), (C) is in a range of 5 to 25 pts.mass, and a pigment body concentration is 35% or more.

Description

[0001] This application is a divisional application of Chinese Patent Application No. 201510489689.3 with the same title of invention, and the original application date is August 11, 2015. technical field [0002] The present invention relates to a stain-resistant matte water-based paint composition and a method for forming a stain-resistant matte coating film using the composition. Background technique [0003] In recent years, customers' needs for interior and exterior wall coatings such as buildings have diversified, and awareness of finishing gloss that affects the appearance impression is changing. In particular, on the outer wall, conventionally, a high-quality glossy finish is preferred, but the demand for a so-called matte finish with a dull appearance and low gloss is increasing. [0004] In general, the matting coating used to form matting coating finishing can be designed by the following methods: the method of using the refractive index difference of the resin; t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D133/12C09D125/14C09D133/08C09D7/61C09D7/63C08F220/14C08F212/08C08F220/18C08F220/20C08F230/08C08F220/06
Inventor 井上刚
Owner KANSAI PAINT CO LTD
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