A kind of antiseptic-free water-based architectural coating and preparation method thereof

A technology for architectural coatings without preservatives, applied in antifouling/underwater coatings, biocide-containing paints, coatings, etc., which can solve the problems of adverse health and environmental protection, poor washability of paint films, etc., to achieve inhibition The effect of microbial reproduction

Active Publication Date: 2022-05-06
SHANGHAI EXCILON NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to address the above-mentioned common water-based architectural coatings in the prior art. In order to prolong the shelf life of the coatings, antibacterial and antiseptic additives are usually added, which will volatilize into the air after painting, which is not conducive to health and environmental protection, and is easy to cause the washability of the paint film. Defects such as poor performance provide a water-based architectural coating without preservatives and a preparation method thereof

Method used

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  • A kind of antiseptic-free water-based architectural coating and preparation method thereof
  • A kind of antiseptic-free water-based architectural coating and preparation method thereof
  • A kind of antiseptic-free water-based architectural coating and preparation method thereof

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Effect test

Embodiment 1

[0044] This embodiment relates to a waterborne architectural coating composition without preservatives, the composition of which is shown in Table 1.

[0045] The preparation steps are as follows:

[0046] (1) Preparation of color paste: mix polyorganometallic siloxane, dispersant, aluminum-magnesium hydrotalcite, inorganic filler, pigment, deionized water, and 65% defoamer evenly, and grind on a grinder until the fineness is less than 20 μm. Filter with a 300-mesh filter cloth to obtain the color paste;

[0047] (2) Thickener is mixed with 8% transparent solution with deionized water, stand-by;

[0048] (3) After mixing the color paste, thickener, water-based acrylic resin, and remaining defoamer evenly, add organic acid in small amounts several times while stirring, and measure the pH value of the paint each time until the pH value of the paint reaches 4-5; In this embodiment, the amount of organic acid finally added is 1%, and the pH value of the coating is 4.1.

[0049]...

Embodiment 2

[0051] This embodiment relates to a waterborne architectural coating composition without preservatives, the composition of which is shown in Table 1.

[0052] The preparation steps are as follows:

[0053] (1) Preparation of color paste: mix polyorganometallic siloxane, dispersant, aluminum-magnesium hydrotalcite, inorganic filler, pigment, deionized water, and 80% defoamer evenly, and grind on a grinder until the fineness is less than 20 μm. Filter with a 300-mesh filter cloth to obtain the color paste;

[0054] (2) The thickener is prepared into a 10% transparent solution with deionized water for use;

[0055] (3) After mixing the color paste, thickener, water-based acrylic resin, and remaining defoamer evenly, add organic acid in small amounts several times while stirring, and measure the pH value of the paint each time until the pH value of the paint reaches 4-5; In this embodiment, the amount of organic acid finally added is 5%, and the pH value of the coating is 4.8. ...

Embodiment 3

[0058] This embodiment relates to a waterborne architectural coating composition without preservatives, the composition of which is shown in Table 1.

[0059] The preparation steps are as follows:

[0060] (1) Preparation of color paste: mix polyorganometallic siloxane, dispersant, aluminum-magnesium hydrotalcite, inorganic filler, pigment, deionized water, and 50% defoamer evenly, and grind on a grinder until the fineness is less than 20 μm. Filter with a 300-mesh filter cloth to obtain the color paste;

[0061] (2) Thickener is mixed with 5% transparent solution with deionized water, stand-by;

[0062] (3) After mixing the color paste, thickener, water-based acrylic resin, and remaining defoamer evenly, add organic acid in small amounts several times while stirring, and measure the pH value of the paint each time until the pH value of the paint reaches 4-5; In this embodiment, the amount of organic acid finally added is 3%, and the pH value of the coating is 4.6.

[0063]...

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Abstract

The invention discloses a water-based architectural coating without preservatives and a preparation method thereof; the composition comprises: polyorganometallic siloxane 20-30%, water-based acrylic resin 1-5%, dispersant 0.2-0.5%, disinfectant Foaming agent 0.2-0.5%, inorganic filler 15-20%, pigment 15-25%, thickener 1-2%, aluminum-magnesium hydrotalcite 5-10%, organic acid 1-5%, deionized water balance. The water-based architectural coating of the present invention does not add antibacterial and antiseptic additives, and the coating system is acidic, so that most microorganisms cannot survive, and is rich in metal cations, which can destroy bacteria and mold cell membranes and cell walls in the coating tank, and can inhibit the occurrence of coatings in the tank. Mildew, with a shelf life of up to 5 years; and after painting, the coating has high hardness, good air permeability, good water and alkali resistance, and a washing resistance of more than 100,000 times.

Description

technical field [0001] The invention belongs to the technical field of building materials, and relates to a preservative-free water-based architectural coating and a preparation method thereof. Background technique [0002] At present, water-based architectural coatings mainly include latex paint and silicate paint. When water-based architectural coatings are produced, water is usually used as the medium, and synthetic resin emulsion is added as a film-forming substance. Surfactants, thickeners, dispersants Agents, defoamers, leveling agents, film-forming aids, etc. These raw materials are nutrients that bacteria and molds can use; the pH of most architectural coating systems is close to neutral or weakly alkaline, which provides a very suitable environment for microorganisms. The living environment will cause the paint to mildew during long-term storage and circulation, resulting in acidification, discoloration, blackening, and odor, and even cause emulsion breakage and har...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D183/14C09D5/14
CPCC09D183/14C09D5/14C08K3/26
Inventor 李力锋赵杰张亚莉郁观贞曾旻旻
Owner SHANGHAI EXCILON NEW MATERIALS
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