Wall surface renovation coating and preparation method thereof

Abstract

The preparation method comprises the following steps: adding an antiseptic bactericide MV into a proper amount of water, uniformly stirring and dispersing, adding bentonite, and uniformly stirring and dispersing at a medium speed; adding an anti-freezing agent, an anti-cracking agent, a thickening water-retaining agent, a coalescing agent, a wetting agent, a dispersing agent and a prepared defoaming agent NXZ, stirring and dispersing uniformly, adjusting the pH value of the system, stopping the machine, adding the self-made acrylic emulsion, and stirring and dispersing uniformly; and continuously adding rutile titanium dioxide, 70-mesh snowflake white, ground calcium carbonate A200, 80-mesh snowflake white, 90-mesh snowflake white and a defoaming agent NXZ, and dispersing at a high speed until no particles are formed, thereby obtaining the wall renovation coating. The coating has excellent adhesive force, good filling performance, excellent crack resistance, waterproof performance and partial heat preservation effect, can be used after a barrel is opened, can be formed through one-time construction, and is high in construction efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of coatings, and in particular to a wall renovation coating and a preparation method thereof. Background Art

[0002] In recent years, the transaction volume of new houses in the market has been gradually decreasing, and the proportion of old house renovation has continued to increase. The construction process of traditional architectural paint renovation products is to apply one coat of interface agent, hang mesh, two coats of mortar putty, and then one coat of primer and two coats of topcoat. This renovation process requires water and electricity to mix mortar putty on site, causing powder tip pollution. The proportion of labor costs and material costs in the domestic coatings industry is changing year by year, and labor costs are getting higher and higher. Simplifying the construction process and vigorously developing time-saving, labor-saving, and labor-saving products has become a top priority.

[0003] Therefore, it is urgent to develop coatings that do not require interface treatment, mesh hanging, mortar putty leveling, and one coat of primer and two coats of topcoat. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a wall renovation paint and a preparation method thereof. The paint is a decorative material composed of a polymer emulsion, anti-cracking fibers, high-quality fillers and functional additives, which is specially used for the reinforcement and leveling of renovation base surfaces. The paint has excellent adhesion, good filling properties, excellent anti-cracking performance, waterproof performance and partial thermal insulation effect. It can be used as soon as the barrel is opened and can be directly constructed and formed in one step, which saves time, labor and effort, and can also achieve the decorative effect of existing paints with environmentally friendly paints.

[0005] The purpose of the present invention is achieved through the following technical solutions:

[0006] First, the present invention provides an acrylic emulsion, which is prepared from the following raw materials in parts by weight: 20-30 parts of methyl methacrylate, 5-10 parts of isobutyl acrylate, 1-3 parts of methacrylic acid, 1-5 parts of hydroxyethyl methacrylate, 0.5-3 parts of N-(hydroxymethyl) acrylamide, 3-10 parts of Conson 678 resin, 0.05-0.5 parts of ammonium persulfate, 0.01-0.5 parts of sodium dodecylbenzene sulfonate, 0.05-0.5 parts of emulsifier OP-10, 0.1-0.3 parts of preservative and fungicide MBS, and an appropriate amount of water.

[0007] Furthermore, the acrylic emulsion is prepared from the following raw materials in parts by weight: 20 to 30 parts of methyl methacrylate, 5 to 10 parts of isobutyl acrylate, 1 to 3 parts of methacrylic acid, 1 to 5 parts of hydroxyethyl methacrylate, 0.5 to 3 parts of N-(hydroxymethyl) acrylamide, 3 to 10 parts of Conson 678 resin, 0.05 to 0.5 parts of ammonium persulfate, 0.01 to 0.5 parts of sodium dodecylbenzene sulfonate, 0.05 to 0.5 parts of emulsifier OP-10, 0.1 to 0.3 parts of preservative and fungicide MBS, and an appropriate amount of water.

[0008] Furthermore, the acrylic emulsion has a solid content of 45-48% and a glass transition temperature Tg of 48-51°C.

[0009] Secondly, the present invention provides a method for preparing the acrylic emulsion, which specifically comprises the following steps:

[0010] Add an appropriate amount of water to the reaction container, heat it to 90°C, add 100% sodium dodecylbenzene sulfonate, 100% emulsifier OP-10 and 100% Conson 678 resin, stir and mix evenly, cool it to 80-83°C, add 10-20% ammonium persulfate, stir and mix evenly to form a prepolymer solution;

[0011] After 100% of methyl methacrylate, 100% of isobutyl acrylate, 100% of methacrylic acid, 100% of hydroxyethyl methacrylate and 100% of N-(hydroxymethyl) acrylamide are mixed and stirred evenly, and then added dropwise into the prepolymer solution together with 50-70% of ammonium sulfate, and the dropping time is controlled to be 4 hours; continue to add 20-30% of ammonium sulfate, heat to 85-90° C. and stir to react for 1 hour, adjust the pH value of the system, cool down, add 100% of the preservative and fungicide MBS, stir and disperse, and discharge to obtain an acrylic emulsion.

[0012] Thirdly, the present invention provides a wall renovation paint, which comprises the following raw materials in parts by weight: 10-15 parts of acrylic emulsion, 15-25 parts of 70 mesh snow white, 25-35 parts of heavy calcium A200, 10-20 parts of 80 mesh snow white, 5-15 parts of 90 mesh snow white, 2-4 parts of rutile titanium dioxide, 0.1-1 part of bentonite, 0.1-0.5 parts of antiseptic and fungicide MV, 0.1-1 part of antifreeze, 0.5-1.5 parts of anti-cracking agent,

[0013] 0.1-1 part thickening and water-retaining agent, 0.1-1 part film-forming aid, 0.01-1 part wetting agent, 0.1-0.5 part dispersant, 0.1-0.5 part defoaming agent NXZ, and appropriate amount of water.

[0014] Furthermore, the dispersant is an ammonium salt dispersant, and the ammonium salt dispersant is at least one of SN-5027, CA-2500, OROTAN963, and DISPERSANT 6227.

[0015] Furthermore, the wetting agent is a non-ionic wetting agent, and the non-ionic wetting agent is at least one of LCN-407, BD-405, and BD-109.

[0016] Furthermore, the thickening and water-retaining agent is at least one of carboxymethyl cellulose (CMC cellulose), hydroxyethyl cellulose (HEC cellulose), hydroxymethyl cellulose (HMC cellulose), and hydroxypropyl methyl cellulose (HPMC cellulose).

[0017] Furthermore, the pH regulator is one of AMP-95 and MA-95.

[0018] Furthermore, the film-forming aid is alcohol ester-12.

[0019] Furthermore, the antifreeze agent is ethylene glycol and / or propylene glycol.

[0020] Furthermore, the anti-cracking agent is formed by mixing polypropylene fiber and wood fiber in a mass ratio of 2:5.

[0021] Fourthly, the present invention provides a method for preparing the above-mentioned wall renovation paint, which specifically comprises the following steps:

[0022] Add 100% of the formula amount of the antiseptic bactericide MV to an appropriate amount of water, stir and disperse evenly, add 100% of the formula amount of bentonite, stir and disperse evenly;

[0023] Then add 100% of the formula amount of antifreeze agent, anti-cracking agent, thickening and water-retaining agent, film-forming aid, wetting agent and dispersant, and 50% of the formula amount of defoamer NXZ, stir and disperse evenly;

[0024] Adjust the pH value of the system, stop the machine, add 100% of the formula amount of acrylic emulsion, and stir to disperse evenly;

[0025] Continue to add 100% of the formula amount of rutile titanium dioxide, 70 mesh snowflake white, heavy calcium A200, 80 mesh snowflake white, 90 mesh snowflake white and 50% of the formula amount of defoamer NXZ, disperse at high speed until there is no granulation, and discharge the material.

[0026] The beneficial effects of the present invention are:

[0027] The decorative material of the present invention, which is composed of polymer emulsion, anti-cracking fiber, high-quality filler and functional additives and is specially used for reinforcing and leveling the renovation base surface, has excellent adhesion, good filling property, excellent anti-cracking performance, waterproof performance and partial thermal insulation effect, is ready for use after opening the barrel, can be directly constructed and formed in one time, saves time, labor and effort, and can achieve the environmentally friendly coating with the decorative effect of existing coatings. It is the preferred supporting product for the renovation of tile surfaces of old buildings.

[0028] The acrylic emulsion synthesized by the present invention is modified by introducing some functional monomers, and a large amount of polar monomers containing hydroxyl and carboxyl groups are added to make the emulsion better chelate or form hydrogen bonds with the mosaic tile base layer when forming a film, thereby generating stronger adhesion, so that the adhesion requirement can be met without adding a silane coupling agent, and a large amount of MMA is added to improve the hardness of the emulsion. DETAILED DESCRIPTION

[0029] In order to further understand the present invention, preferred embodiments of the present invention are described below in conjunction with examples. However, it should be understood that these descriptions are only for further illustrating the features and advantages of the present invention, rather than limiting the claims of the present invention.

[0030] The reagents or instruments used in the present invention without indicating the manufacturer are all conventional products that can be purchased from the market.

[0031] Example 1

[0032] (1) Preparation of acrylic emulsion

[0033] The specific material components and preparation process are as follows:

[0034]

[0035]

[0036] (2) The specific material components and preparation process of the wall renovation coating are as follows:

[0037]

[0038] Example 2

[0039] The difference between Example 2 and Example 1 is that: (2) wall renovation paint is prepared, and the specific preparation process is as follows:

[0040]

[0041] Example 3

[0042] The difference between Example 3 and Example 1 is that: (2) wall renovation paint is prepared, and the specific preparation process is as follows:

[0043]

[0044]

[0045] The construction procedure of the wall renovation coatings prepared in Examples 1 to 3 is as follows:

[0046] (1) Construction process: base inspection and treatment → wall renovation paint → topcoat;

[0047] (2) Construction method: batch coating, dosage is about 0.45-0.55㎡ / time / kg;

[0048] (3) Construction preparation: Stir evenly before construction.

[0049] The wall renovation coatings prepared in Examples 1 to 3 were subjected to performance tests. The performance test items and standards were in accordance with JG / T24-2018. The test results are shown in Table 1.

[0050] Table 1

[0051]

[0052]

[0053] According to the disclosure of the above description, those skilled in the art to which the present invention belongs may also make appropriate changes and modifications to the above embodiments. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the present invention should also fall within the scope of protection of the claims of the present invention. In addition, although some specific terms are used in this specification, these terms are only for the convenience of description and do not constitute any limitation to the present invention.

Claims

1. A wall renovation paint, characterized in that: The invention comprises the following raw materials in parts by weight: 10-15 parts of acrylic emulsion, 15-25 parts of 70-mesh snow white, 25-35 parts of heavy calcium A200, 10-20 parts of 80-mesh snow white, 5-15 parts of 90-mesh snow white, 2-4 parts of rutile titanium dioxide, 0.1-1 part of bentonite, 0.1-0.5 parts of preservative and bactericidal agent MV, 0.1-1 parts of antifreeze agent, 0.5-1.5 parts of anticracking agent, 0.1-1 parts of thickening and water-retaining agent, 0.1-1 parts of film-forming aid, 0.01-1 parts of wetting agent, 0.1-0.5 parts of dispersant, 0.1-0.5 parts of defoaming agent NXZ, and appropriate amount of water.

2. The wall renovation paint according to claim 1, characterized in that: The acrylic emulsion is prepared from the following raw materials in parts by weight: 20 to 30 parts of methyl methacrylate, 5 to 10 parts of isobutyl acrylate, 1 to 3 parts of methacrylic acid, 1 to 5 parts of hydroxyethyl methacrylate, 0.5 to 3 parts of N-(hydroxymethyl) acrylamide, 3 to 10 parts of Conson 678 resin, 0.05 to 0.5 parts of ammonium persulfate, 0.01 to 0.5 parts of sodium dodecylbenzene sulfonate, 0.05 to 0.5 parts of emulsifier OP-10, 0.1 to 0.3 parts of preservative and fungicide MBS, and an appropriate amount of water.

3. The wall renovation paint according to claim 2, characterized in that: The acrylic emulsion is prepared from the following raw materials in parts by weight: 23.5 parts of methyl methacrylate, 7 parts of isobutyl acrylate, 1.5 parts of methacrylic acid, 2 parts of hydroxyethyl methacrylate, 1 part of N-(hydroxymethyl) acrylamide, 5 parts of Conson 678 resin, 0.13 parts of ammonium persulfate, 0.1 parts of sodium dodecylbenzene sulfonate, 0.15 parts of emulsifier OP-10, 0.2 parts of preservative and fungicide MBS, and an appropriate amount of water.

4. The wall renovation paint according to claim 2, characterized in that: The acrylic emulsion is prepared by the following steps: Add an appropriate amount of water to the reaction container, heat it to 90°C, add 100% sodium dodecylbenzene sulfonate, 100% emulsifier OP-10 and 100% Conson 678 resin, stir and mix evenly, cool it to 80-83°C, add 10-20% ammonium persulfate, stir and mix evenly to form a prepolymer solution; After 100% of methyl methacrylate, 100% of isobutyl acrylate, 100% of methacrylic acid, 100% of hydroxyethyl methacrylate and 100% of N-(hydroxymethyl) acrylamide are mixed and stirred evenly, and then added dropwise into the prepolymer solution together with 50-70% of ammonium sulfate, and the dropping time is controlled to be 4 hours; continue to add 20-30% of ammonium sulfate, heat to 85-90° C. and stir to react for 1 hour, adjust the pH value of the system, cool down, add 100% of the preservative and fungicide MBS, stir and disperse, and discharge to obtain an acrylic emulsion.

5. The wall renovation paint according to claim 2, characterized in that: The acrylic emulsion has a solid content of 45-48% and a glass transition temperature Tg of 48-51°C.

6. The wall renovation paint according to claim 1, characterized in that: The anti-cracking agent is prepared by mixing polypropylene fiber and wood fiber in a mass ratio of 2:

5.

7. The wall renovation paint according to claim 1, characterized in that: The dispersant is an ammonium salt dispersant; The wetting agent is a non-ionic wetting agent; The thickening and water-retaining agent is at least one of carboxymethyl cellulose, hydroxyethyl cellulose, hydroxymethyl cellulose and hydroxypropyl methyl cellulose; The film-forming aid is alcohol ester-12; The antifreeze agent is ethylene glycol and / or propylene glycol.

8. The wall renovation paint according to claim 7, characterized in that: The ammonium salt dispersant is at least one of SN-5027, CA-2500, OROTAN963, and DISPERSANT 6227.

9. The wall renovation paint according to claim 7, characterized in that: The nonionic wetting agent is at least one of LCN-407, BD-405, and BD-109.

10. A method for preparing the wall renovation paint according to any one of claims 1 to 9, characterized in that: The steps include: Add 100% of the formula amount of the antiseptic bactericide MV to an appropriate amount of water, stir and disperse evenly, add 100% of the formula amount of bentonite, stir and disperse evenly; Then add 100% of the formula amount of antifreeze agent, anti-cracking agent, thickening and water-retaining agent, film-forming aid, wetting agent and dispersant, and 50% of the formula amount of defoamer NXZ, stir and disperse evenly; Adjust the pH value of the system, stop the machine, add 100% of the formula amount of acrylic emulsion, and stir to disperse evenly; Continue to add 100% of the formula amount of rutile titanium dioxide, 70 mesh snowflake white, heavy calcium A200, 80 mesh snowflake white, 90 mesh snowflake white and 50% of the formula amount of defoamer NXZ, disperse at high speed until there is no granulation, and discharge the material.

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