Formaldehyde-removing coating with sound insulation effect and preparation method thereof

Abstract

The present application relates to the technical field of paint preparation, and discloses a formaldehyde-removing paint with sound insulation and a preparation method thereof. The formaldehyde-removing paint with sound insulation comprises a benzyl acrylate emulsion, a defoaming agent, a leveling agent, a film forming agent, a dispersing agent and water, and further comprises sound insulation fillers and formaldehyde adsorption fillers. The sound insulation fillers are selected from hollow glass microbeads, and the formaldehyde adsorption fillers are diatomite. The sound insulation fillers and the formaldehyde adsorption fillers are added to the paint, so that the prepared paint has sound insulation and formaldehyde adsorption. In particular, the modified diatomite prepared by the method is further added, and compared with the unmodified diatomite, the formaldehyde adsorption of the paint is greatly improved.

Description

Technical Field

[0001] This invention relates to the field of coating preparation technology, specifically to a formaldehyde-removing coating with sound insulation properties and its preparation method. Background Technology

[0002] Styrene-acrylic emulsion is a polymer material obtained by emulsion copolymerization of styrene and acrylate monomers. Due to its excellent properties such as good adhesion, transparent film, water resistance, oil resistance, heat resistance, and aging resistance, it is widely used in the production of architectural coatings, metal surface latex coatings, floor coatings, paper adhesives, and other adhesives.

[0003] For example, Chinese invention patent CN201010269978.X discloses a styrene-acrylic emulsion thermal insulation coating, which contains 70 parts styrene-acrylic emulsion, 35 parts closed-cell perlite, 36 parts ethylenediamine, 10 parts polypropylene fiber, 45 parts acrylic resin, 12 parts potassium sodium silicate, 5 parts triethanolamine, 10 parts phenol, 6 parts binder, 10 parts turpentine, 65 parts water, 2 parts preservative, 15 parts kaolin, 3 parts thickener, and 1 part film-forming aid. While this styrene-acrylic emulsion thermal insulation coating exhibits good thermal insulation, water resistance, and alkali resistance, it does not have formaldehyde removal properties, and its sound insulation capabilities need further improvement. Summary of the Invention

[0004] In order to overcome at least one of the technical problems existing in the prior art, the present invention provides a formaldehyde-removing coating with sound insulation function and a method for preparing the same.

[0005] The above-mentioned technical problem to be solved by the present invention is achieved through the following technical solution:

[0006] This invention provides a formaldehyde-removing coating with sound insulation properties, comprising styrene-acrylic emulsion, defoamer, leveling agent, film-forming agent, dispersant, and water; in addition, it also comprises sound-insulating filler and formaldehyde-adsorbing filler.

[0007] This invention incorporates sound-insulating fillers and formaldehyde-adsorbing fillers, enabling the prepared coating to possess both sound-insulating and formaldehyde-adsorbing properties.

[0008] Preferably, the sound-insulating filler is selected from hollow glass microspheres.

[0009] Preferably, the formaldehyde adsorption filler is diatomaceous earth.

[0010] Preferably, the diatomaceous earth is modified diatomaceous earth;

[0011] The modified diatomaceous earth was prepared by the following method:

[0012] (1) Take diatomaceous earth, add it to water, and stir until it is evenly mixed to obtain a diatomaceous earth dispersion;

[0013] (2) Add cobalt chloride and titanium chloride to the diatomaceous earth dispersion and stir until uniform. Then add sodium hydroxide, heat to 50-70°C, continue stirring for 3-6 hours, and then filter to separate the solid mixture.

[0014] (3) The solid mixture is calcined at 800-1200℃ for 3-6 hours; after calcination, the calcined solid is taken to obtain the modified diatomaceous earth.

[0015] The inventors discovered in their research that adding modified diatomaceous earth prepared by the method described above can significantly improve the formaldehyde adsorption capacity of coatings compared to adding unmodified diatomaceous earth.

[0016] Preferably, the ratio of diatomaceous earth to water in step (1) is 1 kg: 10-20 L.

[0017] Most preferably, the ratio of diatomaceous earth to water in step (1) is 1 kg: 15 L.

[0018] Preferably, in step (2), the ratio of diatomaceous earth dispersion to cobalt chloride, titanium chloride and sodium hydroxide is 10-20L: 0.10-0.15kg: 0.15-0.20kg: 0.20-0.30kg.

[0019] Most preferably, in step (2), the ratio of diatomaceous earth dispersion to cobalt chloride, titanium chloride and sodium hydroxide is 15L:0.13kg:0.19kg:0.24kg.

[0020] Preferably, an auxiliary agent is also added in step (2).

[0021] Preferably, the ratio of diatomaceous earth dispersion to additive is 10-20 L: 0.1-0.2 kg.

[0022] Most preferably, the ratio of diatomaceous earth dispersion to additives is 15L:0.15kg.

[0023] Preferably, the additive is composed of sodium methylene dinaphthalene sulfonate and sodium octadecyl toluene sulfonate.

[0024] Preferably, the weight ratio of sodium methylene dinaphthalene sulfonate and sodium octadecyl toluene sulfonate is 1-3:1-3.

[0025] Further research by the inventors revealed that the addition of additives is crucial in the modification process of diatomaceous earth. Studies have shown that modified diatomaceous earth prepared with the addition of additives composed of sodium methylene dinaphthalene sulfonate and sodium octadecyl toluene sulfonate can significantly improve the formaldehyde adsorption capacity of coatings compared to modified diatomaceous earth prepared without the addition of additives composed of sodium methylene dinaphthalene sulfonate and sodium octadecyl toluene sulfonate.

[0026] Preferably, in step (3), the solid mixture is calcined at 1000°C for 5 hours; after calcination, the calcined solid is taken to obtain the modified diatomaceous earth.

[0027] Preferably, the formaldehyde-removing coating with sound insulation function comprises the following raw material components in parts by weight:

[0028] Styrene-acrylic emulsion 80-120 parts; sound insulation filler 30-50 parts; formaldehyde adsorption filler 20-30 parts; defoamer 1-3 parts; leveling agent 1-5 parts; dispersant 1-3 parts; film forming agent 4-8 parts; water 50-70 parts.

[0029] Preferably, the formaldehyde-removing coating with sound insulation function comprises the following raw material components in parts by weight:

[0030] 90-110 parts of styrene-acrylic emulsion; 30-40 parts of sound insulation filler; 20-25 parts of formaldehyde adsorption filler; 1-2 parts of defoamer; 2-4 parts of leveling agent; 1-2 parts of dispersant; 4-6 parts of film-forming agent; 50-60 parts of water.

[0031] Most preferably, the formaldehyde-removing coating with sound insulation function comprises the following raw material components in parts by weight:

[0032] 100 parts of styrene-acrylic emulsion; 40 parts of sound insulation filler; 25 parts of formaldehyde adsorption filler; 1 part of defoamer; 2 parts of leveling agent; 2 parts of dispersant; 5 parts of film-forming agent; 60 parts of water.

[0033] The present invention also provides a method for preparing the above-mentioned formaldehyde-removing coating with sound insulation function, which includes the following steps:

[0034] The formaldehyde-removing coating with sound insulation effect is obtained by uniformly dispersing styrene-acrylic emulsion, defoamer, leveling agent, film-forming agent, dispersant, sound-insulating filler, formaldehyde-adsorbing filler and water.

[0035] Beneficial effects: This invention provides a novel formaldehyde-removing coating with sound insulation properties; by adding sound-insulating fillers and formaldehyde-adsorbing fillers, the prepared coating has both sound insulation and formaldehyde adsorption properties; in particular, the addition of modified diatomaceous earth prepared by the method described in this invention can significantly improve the formaldehyde adsorption effect of the coating compared to adding unmodified diatomaceous earth. Detailed Implementation

[0036] The present invention will be further explained below with reference to specific embodiments, but the embodiments do not limit the present invention in any way.

[0037] The raw materials used in the following examples are all conventional raw materials that can be purchased by those skilled in the art through conventional means.

[0038] Example 1: Formaldehyde-removing coating with sound insulation properties

[0039] Raw material composition by weight: 100 parts styrene-acrylic emulsion; 40 parts sound insulation filler; 25 parts formaldehyde adsorption filler; 1 part defoamer; 2 parts leveling agent; 2 parts dispersant; 5 parts film-forming agent; 60 parts water;

[0040] The sound-insulating filler is hollow glass microspheres;

[0041] The formaldehyde adsorption filler is diatomaceous earth.

[0042] Preparation method: The formaldehyde-removing coating with sound insulation effect is obtained by uniformly dispersing styrene-acrylic emulsion, defoamer, leveling agent, film-forming agent, dispersant, sound-insulating filler, formaldehyde adsorption filler and water.

[0043] Example 2: Formaldehyde-removing coating with sound insulation properties

[0044] Raw material composition by weight: 100 parts styrene-acrylic emulsion; 40 parts sound insulation filler; 25 parts formaldehyde adsorption filler; 1 part defoamer; 2 parts leveling agent; 2 parts dispersant; 5 parts film-forming agent; 60 parts water;

[0045] The sound-insulating filler is hollow glass microspheres;

[0046] The formaldehyde adsorption filler is modified diatomaceous earth;

[0047] The modified diatomaceous earth was prepared by the following method:

[0048] (1) Take diatomaceous earth, add it to water, and stir evenly to obtain diatomaceous earth dispersion; wherein, the ratio of diatomaceous earth to water is 1kg:15L.

[0049] (2) Add cobalt chloride and titanium chloride to the diatomaceous earth dispersion and stir until uniform. Then add sodium hydroxide, heat to 60°C, continue stirring for 4 hours, and filter to separate the solid mixture. The ratio of the amount of diatomaceous earth dispersion to cobalt chloride, titanium chloride and sodium hydroxide is 15L:0.13kg:0.19kg:0.24kg.

[0050] (3) The solid mixture is calcined at 1000℃ for 5 hours; after calcination, the calcined solid is taken to obtain the modified diatomaceous earth.

[0051] Preparation method: The formaldehyde-removing coating with sound insulation effect is obtained by uniformly dispersing styrene-acrylic emulsion, defoamer, leveling agent, film-forming agent, dispersant, sound-insulating filler, formaldehyde adsorption filler and water.

[0052] Example 3: Formaldehyde-removing coating with sound insulation properties

[0053] Raw material composition by weight: 100 parts styrene-acrylic emulsion; 40 parts sound insulation filler; 25 parts formaldehyde adsorption filler; 1 part defoamer; 2 parts leveling agent; 2 parts dispersant; 5 parts film-forming agent; 60 parts water;

[0054] The sound-insulating filler is hollow glass microspheres;

[0055] The formaldehyde adsorption filler is modified diatomaceous earth;

[0056] The modified diatomaceous earth was prepared by the following method:

[0057] (1) Take diatomaceous earth, add it to water, and stir evenly to obtain diatomaceous earth dispersion; wherein, the ratio of diatomaceous earth to water is 1kg:15L.

[0058] (2) Add an auxiliary agent to the diatomaceous earth dispersion, then add cobalt chloride and titanium chloride and stir evenly. Next, add sodium hydroxide, heat to 60°C, continue stirring for 4 hours, and then filter to separate the solid mixture. The ratio of the amount of diatomaceous earth dispersion to cobalt chloride, titanium chloride and sodium hydroxide is 15L:0.13kg:0.19kg:0.24kg; the ratio of the amount of diatomaceous earth dispersion to the auxiliary agent is 15L:0.15kg; the auxiliary agent is composed of sodium methylene dinaphthalene sulfonate and sodium octadecyl toluene sulfonate in a weight ratio of 1:1.

[0059] (3) The solid mixture is calcined at 1000℃ for 5 hours; after calcination, the calcined solid is taken to obtain the modified diatomaceous earth.

[0060] Preparation method: The formaldehyde-removing coating with sound insulation effect is obtained by uniformly dispersing styrene-acrylic emulsion, defoamer, leveling agent, film-forming agent, dispersant, sound-insulating filler, formaldehyde adsorption filler and water.

[0061] Example 4: Formaldehyde-removing coating with sound insulation properties

[0062] Raw material composition by weight: 100 parts styrene-acrylic emulsion; 40 parts sound insulation filler; 25 parts formaldehyde adsorption filler; 1 part defoamer; 2 parts leveling agent; 2 parts dispersant; 5 parts film-forming agent; 60 parts water;

[0063] The sound-insulating filler is hollow glass microspheres;

[0064] The formaldehyde adsorption filler is modified diatomaceous earth;

[0065] The modified diatomaceous earth was prepared by the following method:

[0066] (1) Take diatomaceous earth, add it to water, and stir evenly to obtain diatomaceous earth dispersion; wherein, the ratio of diatomaceous earth to water is 1kg:15L.

[0067] (2) Add an auxiliary agent to the diatomaceous earth dispersion, then add cobalt chloride and titanium chloride and stir evenly. Next, add sodium hydroxide, heat to 60°C, continue stirring for 4 hours, and then filter to separate the solid mixture. The ratio of the amount of diatomaceous earth dispersion to cobalt chloride, titanium chloride and sodium hydroxide is 15L:0.13kg:0.19kg:0.24kg; the ratio of the amount of diatomaceous earth dispersion to the auxiliary agent is 15L:0.15kg; the auxiliary agent is sodium methylene dinaphthalene sulfonate.

[0068] (3) The solid mixture is calcined at 1000℃ for 5 hours; after calcination, the calcined solid is taken to obtain the modified diatomaceous earth.

[0069] Preparation method: The formaldehyde-removing coating with sound insulation effect is obtained by uniformly dispersing styrene-acrylic emulsion, defoamer, leveling agent, film-forming agent, dispersant, sound-insulating filler, formaldehyde adsorption filler and water.

[0070] Example 5: Formaldehyde-removing coating with sound insulation properties

[0071] Raw material composition by weight: 100 parts styrene-acrylic emulsion; 40 parts sound insulation filler; 25 parts formaldehyde adsorption filler; 1 part defoamer; 2 parts leveling agent; 2 parts dispersant; 5 parts film-forming agent; 60 parts water;

[0072] The sound-insulating filler is hollow glass microspheres;

[0073] The formaldehyde adsorption filler is modified diatomaceous earth;

[0074] The modified diatomaceous earth was prepared by the following method:

[0075] (1) Take diatomaceous earth, add it to water, and stir evenly to obtain diatomaceous earth dispersion; wherein, the ratio of diatomaceous earth to water is 1kg:15L.

[0076] (2) Add an auxiliary agent to the diatomaceous earth dispersion, then add cobalt chloride and titanium chloride and stir evenly. Next, add sodium hydroxide, heat to 60°C, continue stirring for 4 hours, and then filter to separate the solid mixture. The ratio of the amount of diatomaceous earth dispersion to cobalt chloride, titanium chloride and sodium hydroxide is 15L:0.13kg:0.19kg:0.24kg; the ratio of the amount of diatomaceous earth dispersion to the auxiliary agent is 15L:0.15kg; the auxiliary agent is sodium octadecyl toluenesulfonate.

[0077] (3) The solid mixture is calcined at 1000℃ for 5 hours; after calcination, the calcined solid is taken to obtain the modified diatomaceous earth.

[0078] Preparation method: The formaldehyde-removing coating with sound insulation effect is obtained by uniformly dispersing styrene-acrylic emulsion, defoamer, leveling agent, film-forming agent, dispersant, sound-insulating filler, formaldehyde adsorption filler and water.

[0079] Experimental example: Formaldehyde adsorption capacity test

[0080] A formaldehyde detector was fixed to the side wall of a 10L glass bottle; then the bottle was sealed with a stopper containing an injection tube; 1L of the paint to be tested was injected through the injection tube; then formaldehyde was injected through the injection tube to bring the formaldehyde concentration in the glass bottle to 10mg / m³. 3 Record the formaldehyde concentration from the formaldehyde detector after sealing and storing for one day.

[0081] Following the above method, the formaldehyde adsorption effect of the formaldehyde-removing coatings with sound insulation function prepared in Examples 1 to 5 was tested; each group of coatings was tested 5 times, and the average value was taken; the test results are shown in Table 1.

[0082] Table 1. Formaldehyde adsorption test results

[0083] Experimental group 1 The formaldehyde-removing coating with sound insulation properties prepared in Experimental Group 1 <![CDATA[8.5mg / m 3 <!-- 4 -->]]> Experimental group 2 The formaldehyde-removing coating with sound insulation properties prepared in Experimental Group 1 <![CDATA[5.7mg / m 3 ]]> Experimental group 3 The formaldehyde-removing coating with sound insulation properties prepared in Experimental Group 1 <![CDATA[3.1mg / m 3 ]]> Experimental group 4 The formaldehyde-removing coating with sound insulation properties prepared in Experimental Group 1 <![CDATA[4.9mg / m 3 ]]> Experimental group 5 The formaldehyde-removing coating with sound insulation properties prepared in Experimental Group 1 <![CDATA[4.5mg / m 3 ]]>

[0084] As can be seen from the experimental results in Table 1, the formaldehyde concentration in experimental group 1 was 8.5 mg / m³. 3 Compared to the original formaldehyde concentration of 10 mg / m³ 3 The formaldehyde content was significantly reduced; this indicates that the present invention, by adding diatomaceous earth as a formaldehyde adsorption filler, enables the prepared coating to have formaldehyde adsorption properties.

[0085] As can be seen from the experimental results in Table 1, the formaldehyde concentration in experimental group 2 was significantly reduced compared to that in experimental group 1. This indicates that adding modified diatomaceous earth prepared by the method described in this invention to the coating can significantly improve the formaldehyde adsorption capacity of the coating compared to adding unmodified diatomaceous earth.

[0086] As can be seen from the experimental results in Table 1, the formaldehyde concentration in experimental group 3 was significantly reduced compared to that in experimental group 2. This indicates that the addition of additives is crucial in the modification process of diatomaceous earth. The above experiments show that the modified diatomaceous earth prepared with the additives composed of sodium methylene dinaphthalene sulfonate and sodium octadecyl toluene sulfonate can significantly improve the formaldehyde adsorption capacity of the coating compared to the modified diatomaceous earth prepared without the additives composed of sodium methylene dinaphthalene sulfonate and sodium octadecyl toluene sulfonate.

[0087] As can be seen from the experimental results in Table 1, although the formaldehyde concentration in experimental groups 4 and 5 was lower than that in experimental group 2, the reduction was not significant; the reduction was much smaller than that in experimental group 3. This indicates that in the modification process of diatomaceous earth, modified diatomaceous earth prepared by adding an additive composed of sodium methylene dinaphthalene sulfonate and sodium octadecyl toluene sulfonate must significantly improve the formaldehyde adsorption capacity of the coating compared to modified diatomaceous earth prepared without the additive. However, modified diatomaceous earth prepared by adding only sodium methylene dinaphthalene sulfonate or sodium octadecyl toluene sulfonate cannot significantly improve the formaldehyde adsorption capacity of the coating.

Claims

1. A formaldehyde-removing coating with sound insulation properties, comprising a styrene-acrylic emulsion, a defoamer, a leveling agent, a film-forming agent, a dispersant, and water, characterized in that, It also includes sound insulation filler and formaldehyde adsorption filler; The formaldehyde adsorption filler is diatomaceous earth; The diatomaceous earth mentioned is modified diatomaceous earth; The modified diatomaceous earth was prepared by the following method: (1) Take diatomaceous earth, add it to water, and stir evenly to obtain a diatomaceous earth dispersion; (2) Add cobalt chloride and titanium chloride to the diatomaceous earth dispersion and stir until uniform. Then add sodium hydroxide, heat to 50~70℃, continue stirring for 3~6h, and then filter to separate the solid mixture. (3) The solid mixture is calcined at 800~1200℃ for 3~6h; after calcination, the calcined solid is taken to obtain the modified diatomaceous earth.

2. The formaldehyde-removing coating with sound insulation function according to claim 1, characterized in that, The sound-insulating filler is selected from hollow glass microspheres.

3. The formaldehyde-removing coating with sound insulation function according to claim 1, characterized in that, In step (1), the ratio of diatomaceous earth to water is 1kg:10~20L.

4. The formaldehyde-removing coating with sound insulation function according to claim 1, characterized in that, In step (2), the ratio of diatomaceous earth dispersion to cobalt chloride, titanium chloride and sodium hydroxide is 10~20L:0.10~0.15kg:0.15~0.20kg:0.20~0.30kg.

5. The formaldehyde-removing coating with sound insulation function according to claim 1, characterized in that, In step (3), the solid mixture is calcined at 1000℃ for 5 hours; after calcination, the calcined solid is taken to obtain the modified diatomaceous earth.

6. The formaldehyde-removing coating with sound insulation function according to claim 1, characterized in that, The raw material components comprise the following parts by weight: Styrene-acrylic emulsion 80-120 parts; sound insulation filler 30-50 parts; formaldehyde adsorption filler 20-30 parts; defoamer 1-3 parts; leveling agent 1-5 parts; dispersant 1-3 parts; film forming agent 4-8 parts; water 50-70 parts.

7. The formaldehyde-removing coating with sound insulation function according to claim 1, characterized in that, The raw material components comprise the following parts by weight: 90-110 parts of styrene-acrylic emulsion; 30-40 parts of sound insulation filler; 20-25 parts of formaldehyde adsorption filler; 1-2 parts of defoamer; 2-4 parts of leveling agent; 1-2 parts of dispersant; 4-6 parts of film-forming agent; 50-60 parts of water.

8. The method for preparing the formaldehyde-removing coating with sound insulation effect according to any one of claims 1 to 7, characterized in that, It includes the following steps: The formaldehyde-removing coating with sound insulation effect is obtained by uniformly dispersing styrene-acrylic emulsion, defoamer, leveling agent, film-forming agent, dispersant, sound-insulating filler, formaldehyde-adsorbing filler and water.