CN109385206B

CN109385206B - Mineral paint and preparation method thereof

Info

Publication number: CN109385206B
Application number: CN201811284879.1A
Authority: CN
Inventors: 刘丰高; 雷桂奇; 唐子林
Original assignee: Guangdong Huaxin New Material Co ltd
Current assignee: Guangdong Huaxin New Material Co ltd
Priority date: 2018-10-31
Filing date: 2018-10-31
Publication date: 2020-11-24
Anticipated expiration: 2038-10-31
Also published as: CN109385206A

Abstract

The invention discloses a mineral paint which comprises the following components in percentage by mass: 0.3-0.5% of polymer modified bentonite, 20-25% of organic silicon emulsion, 5-10% of pure acrylic emulsion, 10-15% of pigment, 20-40% of filler, 0.3-0.6% of defoaming agent, 0.2-0.4% of wetting agent, 0.5-0.8% of dispersing agent, 0.4-0.6% of antifreezing agent, 3-5% of thickening agent, 0.1-0.3% of neutralizing agent, 0.3-0.5% of preservative and the balance of water. The mineral paint is prepared by compounding diatomite with a filler consisting of a plurality of components, an organic silicon emulsion with good film forming property, a pure acrylic emulsion and various auxiliaries without VOC and formaldehyde, and the prepared mineral paint not only has good effect of adsorbing VOC and formaldehyde, but also can better remove VOC and formaldehyde. The invention also discloses a preparation method of the mineral paint.

Description

Mineral paint and preparation method thereof

Technical Field

The invention belongs to the technical field of wall coatings, and particularly relates to a mineral paint and a preparation method thereof.

Background

With the coming of the third pollution period marked by 'indoor air pollution', people are more and more looking to breathe pure air, and the air is polluted more and more by harmful substances in decoration, so that the health of people is seriously affected, and even more, the people directly threaten the life of people.

Most of the existing wall paints in the market are added with a solvent containing a large amount of VOC and formaldehyde and an auxiliary agent containing a large amount of residual monomers to improve the storage and application properties of the products.

The main components of the seaweed mud mineral paint are original ecological minerals such as seaweed mud, the mineral components of the seaweed mud mainly comprise opal and varieties thereof, and the mineral components of the seaweed mud are clay minerals, namely hydromica, kaolinite and mineral debris. The mineral debris comprises quartz, feldspar, biotite, organic matters and the like, and the content of the organic matters is from trace to more than 30 percent. However, the diatomite and the diatom ooze are only singly added into a plurality of wall paints, so that the effect of adsorbing VOC can be achieved, and the effect of removing VOC is not achieved.

For example, in the emulsion with the glass transition temperature of about 20 ℃ usually adopted by the wall paint in the existing market, a large amount of film-forming auxiliary agent with a very low boiling point is required to be added to change the film-forming temperature of the wall paint, but the VOC content of the wall paint is increased in the process; most of the existing wall paint thickeners adopt alkali swelling thickeners and associative type and polyurethane thickeners, and the thickeners contain a large amount of residual monomers and VOC; the existing wall paint neutralizer uses a large amount of organic ammonia to adjust the pH value, and a large amount of ammonia odor is generated in the construction process, so that the health of constructors is influenced; the existing wall paint is usually treated by adding ethylene glycol and propylene glycol, the antifreeze is solvent-based and has a boiling point lower than 290 ℃, and the addition of the antifreeze in the wall paint is equivalent to the addition of VOC; similarly, most of the existing wall paint preservatives are of the kasong type, and the preservatives contain formaldehyde, so that the environment is not protected.

Disclosure of Invention

The invention aims to provide a mineral paint which is prepared by compounding diatomite with a filler consisting of a plurality of components, an organic silicon emulsion with good film forming property, a pure acrylic emulsion and various auxiliaries without VOC and formaldehyde.

The invention also aims to provide a preparation method of the mineral paint, which has simple process and low cost.

The first object of the present invention is achieved by the following technical solutions: the mineral paint comprises the following components in percentage by mass:

in the above-mentioned components of the mineral paint:

preferably, the polymer modified bentonite of the invention is prepared by purifying and modifying hectorite. Recommended but not limited to from south Beijing Haimines New materials science and technology company.

The thickening and anti-settling effect of the paint is achieved in the mineral paint, and the paint fluidity is improved to improve the can opening appearance effect of the paint.

Preferably, the silicone emulsion of the present invention is Wacker silicone SILRES BS 1306 CN. Recommended but not limited to, for sale by Guangdong lake science and technology Limited.

Preferably, the pure acrylic emulsion of the invention is produced by Guangdong Bade Fukui Co., Ltd, and the model number of the pure acrylic emulsion is RS-2205.

The wall paint in the existing market usually adopts emulsion with the glass transition temperature of about 20 ℃, and a large amount of film-forming auxiliary agent with a very low boiling point is required to be added to change the film-forming temperature of the wall paint, so that the VOC content of the wall paint is increased.

According to the invention, according to the national standard that the room temperature is lower than 10 ℃ and no construction is carried out, the organic silicon emulsion and the pure acrylic emulsion with the glass transition temperature of 5 ℃ are adopted, so that the production cost can be effectively reduced without adding a film-forming auxiliary agent.

The acrylic emulsion has the functions of assisting the organic silicon emulsion in forming a film, increasing the scrub resistance and the efficient packing of the wall paint, and further increasing the compactness of the formed film.

Preferably, the pigment is titanium dioxide.

Preferably, the filler is prepared from the following raw materials in parts by mass: ultra-fine aluminum silicate: 2-3, heavy calcium carbonate: 15-25, talc powder: 2-3, calcining kaolin: 5-10 parts of nano titanium dioxide/white carbon black composite photocatalytic material 2-5 parts of diatomite: 3 to 5.

Preferably, the filler is prepared from the following raw materials in parts by mass: ultra-fine aluminum silicate: 2.5, ground calcium carbonate: 20. talc powder: 2.5, calcined kaolin: 8. 3.5 parts of nano titanium dioxide/white carbon black composite photocatalytic material, diatomite: 4.

the ultrafine aluminum silicate in the filler has good anti-settling effect when matched with the suspension property of other powder materials in a formula system, can increase the whiteness and contrast ratio of a product in the same white pigment, and can replace a part of white pigment to reduce the production cost.

The ground limestone has good suspension property in a formula system, and is beneficial to completely wrapping powder by the emulsion so as to increase the dustproof effect of the wall paint.

Further, the ground calcium carbonate is preferably 3000 mesh ground calcium carbonate.

The talcum powder increases the fineness of the wall paint in a formula system, so that the hand sensitivity is improved.

Further, the calcined kaolin is preferably 4000 mesh calcined kaolin.

The nano titanium dioxide/white carbon black composite photocatalytic material has the main functions of increasing the aldehyde removal rate and the aldehyde removal durability of the wall paint in a formula system.

The diatomite has the main function in the formula system of assisting the aldehyde removal rate and the aldehyde removal durability of the nano titanium dioxide/white carbon black composite photocatalytic material by utilizing the functional characteristics of the diatomite.

Preferably, the defoamer of the present invention is a silicone defoamer, type W-082 or DF-7015, recommended for, but not limited to, sale by Melamine chemical Co.

Preferably, the humectants of the present invention are of the type FA182 or FN211, recommended for sale but not limited to by the Millettia chemical company, Inc.

Preferably, the dispersant of the present invention is recommended to be, but not limited to, a type manufactured by Rohm and Haas

One or more of a quick and easy dispersant of sodium polyacrylate salt of KUAIYI, a recommended but not limited to ammonium polycarboxylate dispersant model SN-5027 available from ropsaceae, and a dispersant model SN-DISPERSANT 5029 available from ropsaceae.

Preferably, the antifreeze of the present invention is preferably, but not limited to, an antifreeze manufactured by Acksu corporation under the type BCD 42A.

The existing antifreezing treatment of the wall paint is usually to add ethylene glycol and propylene glycol, and the antifreezing agent is solvent-based and has a boiling point lower than 290 ℃, is added in the wall paint, and is added with VOC.

The invention adopts BCD42A antifreeze agent produced by Acksu company, which is an antifreeze agent improved aiming at the defects of several antifreeze agents commonly used in the prior art, does not contain VOC, has the addition amount of one third of the existing antifreeze agent, and is beneficial to reducing the production cost.

Preferably, the thickening agent of the invention is maltose thickening agent and hydroxyethyl cellulose.

Further, the maltose thickener is recommended but not limited to maltose thickener manufactured by Jinan Mingde chemical company, Inc., and the hydroxyethyl cellulose is recommended but not limited to hydroxyethyl cellulose manufactured by Luzhou North chemical industry, Inc.

Most of the existing wall paint thickeners adopt alkali swelling thickeners and associative type and polyurethane thickeners, and the thickeners contain a large amount of residual monomers and VOC.

The maltose thickener and the hydroxyethyl cellulose are matched for use, and residual monomers and VOC are not generated.

Preferably, the neutralizing agent is sodium silicate, which is produced by Fushan Zhongshengmuio glass factories and has the model of ZF 32-40A.

The prior neutralizing agent for the wall paint uses a large amount of organic ammonia to adjust the pH value, and can generate a large amount of ammonia odor in the construction process so as to influence the health of constructors.

Preferably, the preservative of the present invention is potassium sorbate preservative manufactured by Zheng Zhou Qianshuo food additives Co.

Most of the preservatives of the existing wall paint adopt kasong preservatives, the preservatives contain formaldehyde, and the food-grade potassium sorbate preservatives adopted by the invention do not contain substances harmful to human health.

Therefore, the mineral paint of the invention has obvious difference from the existing wall paint in the aspects of polymer modified bentonite, organic silicon emulsion, pure acrylic emulsion, thickening agent, neutralizing agent, antifreezing agent, preservative and the like.

The second object of the present invention is achieved by the following technical solutions: the preparation method of the mineral paint comprises the following steps:

(1) selecting a neutralizing agent, a preservative and part of water, and dissolving to prepare a solution a;

(2) selecting polymer modified bentonite, organic silicon emulsion, pure acrylic emulsion, a thickening agent and part of water, and uniformly dispersing to obtain a solution b;

(3) selecting pigment, filler, defoamer, wetting agent, dispersant, antifreeze and residual water, dispersing at high speed, and grinding until the fineness is less than or equal to 50 to obtain solution c;

(4) and adding the solution c into the solution b, dispersing at a medium speed until uniformly mixing to obtain a mixed solution, and then adding the solution a into the mixed solution, and dispersing at a low speed until uniformly mixing to obtain the mineral paint.

The amount of the part of water in the step (1) is 0.01-0.02% of the total mass of the water.

In the step (2), the amount of the part of water is 5-10% of the total mass of the water.

In the step (3), the rotation speed during high-speed dispersion is 1000-1500 rpm, more preferably 1200 rpm, and the dispersion time is 5-15 min.

In the step (4), the rotation speed is 600-100 rpm, preferably 800 rpm, and the dispersion time is 15-25 min.

In the step (4), the rotation speed during slow dispersion is 300-500 rpm, preferably 400 rpm, and the dispersion time is 8-15 min.

Compared with the prior art, the invention has the following advantages: aiming at the problems that most of wall paints in the existing market are added with a VOC-containing solvent and a lot of auxiliary agents with residual monomers to improve the storage and construction performance of products, and a lot of wall paints are only added with diatomite and diatom ooze singly and only can play roles in adsorbing and not removing VOC, the invention adopts the collocation of polymer modified bentonite, organic silicon emulsion, pure acrylic emulsion, various auxiliary agents and different fillers to improve the storage and construction performance of the wall paints, and the diatomite and the nano titanium dioxide/white carbon black composite photocatalytic material are used in the fillers in a matched way, so that the adsorption effect of the diatomite can be increased, and meanwhile, harmful substances such as VOC, formaldehyde and the like can be well removed.

Detailed Description

Example 1

The mineral paint provided by the embodiment comprises the following components in percentage by mass:

wherein:

the polymer modified bentonite is prepared by purifying and modifying hectorite and is purchased from Nanjing Hamming new materials science and technology company Limited.

The silicone emulsion was Wake silicone SILRES BS 1306CN, sold by Guangdong lake science Inc.

The pure acrylic emulsion is produced by Guangdong Bade Fukuji Co., Ltd, and the model number of the pure acrylic emulsion is RS-2205.

The pigment is titanium dioxide.

The filler is prepared from the following raw materials in parts by mass: 2 parts of superfine aluminum silicate, 25 parts of heavy calcium carbonate, 2 parts of talcum powder, 10 parts of calcined kaolin, 2 parts of nano titanium dioxide/white carbon black composite photocatalytic material and 5 parts of diatomite.

The ground calcium carbonate is 3000 mesh ground calcium carbonate.

The calcined kaolin was 4000 mesh calcined kaolin.

The defoamer is an organic silicon defoamer with the model number of W-082 sold by MEIREN CHEMICAL CORPORATION.

The humectant is sold under the model number FA182 by the Millipore chemical company, Inc.

The dispersant is of the type manufactured by Rohm and Haas

Sodium polyacrylate salt of KUAIYI.

The antifreeze was an antifreeze manufactured by aksu corporation under model number BCD 42A.

The thickener is maltose thickener produced by Jinan Mingde chemical company Limited.

The neutralizer is sodium silicate, is produced by Foshan Mitsubishi glass factories, and has the model of ZF 32-40A.

The antiseptic is potassium sorbate antiseptic, and is produced by Zhengzhou Qianshuo food additive Co.

The preparation method of the mineral paint comprises the following steps:

(2) selecting polymer modified bentonite, a thickening agent, an organic silicon emulsion, a pure acrylic emulsion and part of water, and uniformly dispersing to obtain a solution b;

The amount of the part of water in the step (1) is 0.02 percent of the total mass of the water.

The amount of water used in step (2) is approximately 10% of the total water amount.

And (3) the rotating speed during high-speed dispersion in the step (3) is 1200 revolutions per minute, and the dispersion time is 10 min.

And (4) in the step (4), the rotating speed is 800 revolutions per minute when medium-speed dispersion is carried out, and the dispersion time is 20 min.

In the step (4), the rotating speed is 400 rpm when the slow speed dispersion is carried out, and the dispersion time is 12 min.

Example 2

wherein:

The pigment is titanium dioxide.

The filler is prepared from the following raw materials in parts by mass: 3 parts of superfine aluminum silicate, 15 parts of heavy calcium carbonate, 3 parts of talcum powder, 5 parts of calcined kaolin, 5 parts of nano titanium dioxide/white carbon black composite photocatalytic material and 3 parts of diatomite.

The ground calcium carbonate is 3000 mesh ground calcium carbonate.

The calcined kaolin was 4000 mesh calcined kaolin.

The defoamer is an organic silicon defoamer with the model of DF-7015, sold by Meiren chemical Co.

The humectant was sold under the model FN211 by US R.C..

The dispersant is of the type manufactured by Rohm and Haas

Sodium polyacrylate salt of KUAIYI.

The preparation method of the mineral paint comprises the following steps:

The amount of the water used in the step (1) is 0.01 percent of the total mass of the water.

The amount of water used in step (2) is approximately 5% of the total water amount.

Example 3

wherein:

The pigment is titanium dioxide.

The filler is prepared from the following raw materials in parts by mass: 2.5 parts of superfine aluminum silicate, 20 parts of heavy calcium carbonate, 2.5 parts of talcum powder, 8 parts of calcined kaolin, 3.5 parts of nano titanium dioxide/white carbon black composite photocatalytic material and 4 parts of diatomite.

The ground calcium carbonate is 3000 mesh ground calcium carbonate.

The calcined kaolin was 4000 mesh calcined kaolin.

The dispersant is of the type manufactured by Rohm and Haas

Sodium polyacrylate salt of KUAIYI.

The preparation method of the mineral paint comprises the following steps:

The amount of the part of water in the step (1) is 0.015 percent of the total mass of the water.

The amount of water used in step (2) is approximately 8% of the total water.

The mineral paints of examples 1 to 3 were tested by the test center, and the items, indexes and test results are shown in table 1 below.

Table 1 general properties of mineral paints and coating films prepared according to examples 1 to 3 of the present invention.

As can be seen from Table 1, the mineral paints in examples 1 to 3 of the present invention have good indexes and meet the product quality requirements.

TABLE 2 Formaldehyde scavenging Properties of mineral paint coatings prepared in examples 1-3

As can be seen from table 2, the mineral paints in examples 1 to 3 of the present invention have formaldehyde purification rates of 80.4%, 83.8% and 85.3%, respectively, and persistence of formaldehyde purification effects of 90.2%, 93.7% and 91.6%, respectively, and have high formaldehyde removal efficiency and no VOC residue.

The components listed in the invention, the upper limit, the lower limit and the interval value of the components can realize the invention, and the examples are not listed. The present invention has been described above by referring to a part of specific embodiments, and it should be noted that the above-mentioned specific embodiments are only used for further description of the present invention and do not represent a limitation to the scope of the present invention. Other insubstantial modifications and adaptations of the present invention can be made without departing from the scope of the present invention.

Claims

1. The mineral paint is characterized by comprising the following components in percentage by mass:

0.3 to 0.5 percent of polymer modified bentonite

20-25% of organic silicon emulsion

5-10% of pure acrylic emulsion

10 to 15 percent of pigment

20-40% of filler

0.3 to 0.6 percent of defoaming agent

0.2 to 0.4 percent of wetting agent

0.5 to 0.8 percent of dispersant

0.4 to 0.6 percent of antifreezing agent

3 to 5 percent of thickening agent

0.1 to 0.3 percent of neutralizer

0.3 to 0.5 percent of preservative

The balance of water;

the polymer modified bentonite is prepared by purifying and modifying hectorite;

the organic silicon emulsion is watt-gram organic silicon SILRESBS 1306 CN;

the filler is prepared from the following raw materials in parts by mass: ultra-fine aluminum silicate: 2-3, heavy calcium carbonate: 15-25, talc powder: 2-3, calcining kaolin: 5-10 parts of nano titanium dioxide/white carbon black composite photocatalytic material 2-5 parts of diatomite: 3-5;

the antifreeze is an antifreeze which is produced by Acksu company and has the model number of BCD 42A; the thickening agent is maltose thickening agent and hydroxyethyl cellulose; the neutralizing agent is sodium silicate; the preservative is a potassium sorbate preservative.

2. Mineral paint according to claim 1, characterized in that: the pure acrylic emulsion is purchased from Guangdong Bade Fukutowards Co.

3. Mineral paint according to claim 1, characterized in that: the pigment is titanium dioxide.

4. Mineral paint according to claim 1, characterized in that: the filler is prepared from the following raw materials in parts by mass: ultra-fine aluminum silicate: 2.5, ground calcium carbonate: 20. talc powder: 2.5, calcined kaolin: 8. 3.5 parts of nano titanium dioxide/white carbon black composite photocatalytic material, diatomite: 4.

5. mineral paint according to claim 1, characterized in that: the defoaming agent is an organic silicon defoaming agent with the model of W-082 or DF-7015; the wetting agent is FA182 or FN 211; the dispersant is one or more of polyacrylic acid sodium salt, polycarboxylic acid ammonium salt and dispersant with model number SN-DISPERSANT 5029 produced by Loupco.

6. A method of preparing a mineral paint as claimed in any one of claims 1 to 5, comprising the steps of: