Durable stain-resistant easy-to-construct two-component glaze paint and preparation method thereof

Abstract

The invention relates to durable stain-resistant easy-to-construct two-component glaze paint and a preparation method thereof, and relates to the technical field of paints.The durable stain-resistant easy-to-construct two-component glaze paint is prepared from, by weight, a component A, a component B, a component C and a component D, the component A is prepared from 55-65 parts of hydroxyl-containing acrylic emulsion, 0.2-0.5 part of base material wetting agent, 22-30 parts of pigment filler, 4-8 parts of water and 1.5-3.0 parts of wax-containing dispersion, and the component D is prepared from, by weight, 5-10 parts of water; 1.8 to 5.0 parts of other auxiliary agents; the component B comprises a water dispersible isocyanate curing agent and the like. According to the double-component latex paint, hydroxyl in the component A reacts with isocyanate groups in the component B, so that a compact paint film is formed through crosslinking and curing, and then the overall moisture content is reduced, a high-proportion wax-containing dispersion is increased, and a base material wetting agent with a low HLB value is used; the stain resistance of a paint film can be further improved, the recoatability of the paint film is obviously improved, oil shrinkage and other abnormalities are avoided, and the defects in the prior art are overcome.

Description

Technical Field

[0001] The invention relates to the technical field of coatings, and in particular to a durable, stain-resistant and easy-to-apply two-component glaze paint and a preparation method thereof. Background Art

[0002] In the field of building decoration materials, latex paint has long dominated the market with its low cost, excellent decorative effect and good substrate protection function. It can not only provide rich and diverse colors and textures for indoor and outdoor walls, but also resist daily wear and tear to a certain extent, extending the service life of buildings. However, as people's requirements for the quality of living environment are increasing, the limitations of traditional latex paint in some performances are gradually emerging, especially the problem of insufficient stain resistance.

[0003] Traditional latex paints are often difficult to effectively resist common stains in daily life, such as oil stains, water stains, dust, etc. Once contaminated, it is often difficult to restore the original state by simply wiping, which not only affects the beauty of the wall, but also increases the cost and difficulty of maintenance. This defect limits the application of latex paint in the field of high-end decoration, especially in places with extremely high requirements for cleanliness and beauty, such as family living rooms, restaurants, hospitals, schools, etc.

[0004] In view of this, there is an urgent need in the market for a new type of coating product that can maintain the original advantages of latex paint and significantly improve its stain resistance. As an innovative coating solution, water-based two-component glaze paint has attracted much attention due to its environmental friendliness, high gloss and excellent durability. However, how to further improve the stain resistance of glaze paint while ensuring good construction performance has become a major challenge in the current research and development of coating technology.

[0005] Therefore, developing a water-based two-component glaze paint that is durable, stain-resistant and easy to construct can not only effectively solve the problem of poor stain resistance of traditional latex paint and meet the market demand for high-quality, easy-to-maintain decorative materials, but also promote technological progress in the building decoration materials industry, and has extremely broad market application prospects and significant social and economic benefits. Summary of the invention

[0006] In order to solve the above problems, the present invention provides a durable, stain-resistant and easy-to-apply two-component glaze paint and a preparation method thereof.

[0007] In a first aspect, the present invention provides a durable, stain-resistant and easy-to-apply two-component glaze paint, wherein the durable, stain-resistant and easy-to-apply two-component glaze paint comprises the following components in parts by weight:

[0008] Component A: 55-65 parts of hydroxyl-containing acrylic emulsion, 0.2-0.5 parts of substrate wetting agent, 22-30 parts of pigments and fillers, 4-8 parts of water, 1.5-3.0 parts of wax-containing dispersion, and 1.8-5.0 parts of other additives;

[0009] Component B: water dispersible isocyanate curing agent;

[0010] Wherein, the mass percentage of water in the A component is ≤8%, and the HLB value of the substrate wetting agent is ≤6;

[0011] The hydroxyl content of the hydroxyl-containing acrylic emulsion is greater than 4.5% based on solid content.

[0012] Furthermore, the weight ratio of the component A to the component B is 100:(15-20).

[0013] Furthermore, the pigment filler includes one or more of titanium dioxide, heavy calcium powder and wollastonite.

[0014] Furthermore, the other auxiliary agents include one or more of a dispersant, a film-forming auxiliary agent, a defoaming agent, a thickener, a preservative, a mildewproof agent and a dustproof agent.

[0015] Furthermore, the mass percentage of NCO in the water-dispersible isocyanate curing agent is 19.5-22%, and the other additives are composed of a dispersant, a film-forming aid, a defoaming agent, a thickener, a preservative, a mildew inhibitor and a dust inhibitor in a weight ratio of (0.4-1.2): (1-3): (01-0.6): (0.2-0.8): (0.1-0.5): (0.1-0.6): (0-1.0).

[0016] Furthermore, the substrate wetting agent includes at least one of polyether polyol and fatty alcohol alkoxy polymer.

[0017] Furthermore, the wax-containing dispersion is polyethylene wax.

[0018] In a second aspect, the present invention provides a method for preparing the durable, stain-resistant and easy-to-apply two-component glaze paint according to any one of the first aspects, the preparation method comprising the following steps:

[0019] Stir and mix water, pigments, fillers and some other additives to obtain pigment and filler slurry;

[0020] Adding a substrate wetting agent and a wax-containing dispersion into the pigment and filler slurry, stirring and mixing, to obtain an intermediate mixed slurry;

[0021] Adding hydroxyl-containing acrylic emulsion and other remaining additives into the intermediate mixed slurry, the durable, stain-resistant and easy-to-apply two-component glaze paint is obtained.

[0022] Furthermore, when preparing the pigment and filler slurry, other additives added are dispersant, defoamer accounting for 1 / 3 to 1 / 2 of the total weight of the defoamer, and thickener accounting for 1 / 3 to 1 / 2 of the total weight of the thickener.

[0023] The above technical solution provided by the embodiment of the present invention has at least the following advantages compared with the prior art:

[0024] The embodiment of the present invention provides a two-component glaze paint that is durable, stain-resistant and easy to construct. The two-component latex paint provided by the present invention is based on the reaction of hydroxyl groups in component A and isocyanate groups in component B, thereby cross-linking and curing to form a dense paint film, and then by reducing the overall moisture content, increasing a high proportion of wax-containing dispersions and using a substrate wetting agent with a low HLB value, the stain resistance of the paint film can be further improved, and its recoatability can be significantly improved, and abnormalities such as oil shrinkage will not occur, thereby making up for the shortcomings of the prior art. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution of the present invention will be clearly and completely described in combination with the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] Unless otherwise specified, various raw materials, reagents, instruments and equipment used in the present invention can be purchased from the market or prepared by existing methods.

[0027] In a first aspect, the present invention provides a durable, stain-resistant and easy-to-apply two-component glaze paint, wherein the durable, stain-resistant and easy-to-apply two-component glaze paint comprises the following components in parts by weight:

[0028] Component A: 55-65 parts of hydroxyl-containing acrylic emulsion, 0.2-0.5 parts of substrate wetting agent, 22-30 parts of pigments and fillers, 4-8 parts of water, 1.5-3.0 parts of wax-containing dispersion, and 1.8-5.0 parts of other additives;

[0029] Component B: water dispersible isocyanate curing agent;

[0030] Wherein, the mass percentage of water in the A component is ≤8%, and the HLB value of the substrate wetting agent is ≤6.

[0031] The present invention provides for the first time a durable, stain-resistant and easy-to-apply two-component glaze paint. The two-component latex paint provided by the present invention is based on the reaction of hydroxyl groups in component A and isocyanate groups in component B, thereby cross-linking and curing to form a dense paint film, and then by reducing the overall moisture content, increasing a high proportion of wax-containing dispersions and using a substrate wetting agent with a low HLB value, the stain resistance of the paint film can be further improved and its recoatability can be significantly improved, and abnormalities such as oil shrinkage will not occur, thereby making up for the shortcomings of the prior art.

[0032] In some specific embodiments, the weight ratio of the component A to the component B is 100:(15-20).

[0033] In some specific embodiments, the pigments and fillers include one or more of titanium dioxide, heavy calcium powder and wollastonite.

[0034] In some specific embodiments, the other auxiliary agents include one or more of a dispersant, a film-forming aid, a defoaming agent, a thickener, a preservative, a mildew preventer and a dust preventer.

[0035] In some specific embodiments, the mass percentage of NCO in the water-dispersible isocyanate curing agent is 19.5-22%, and the other additives are composed of a dispersant, a film-forming aid, a defoaming agent, a thickener, a preservative, a mildew inhibitor and a dust suppressant in a weight ratio of (0.4-1.2): (1-3): (01-0.6): (0.2-0.8): (0.1-0.5): (0.1-0.6): (0-1.0).

[0036] In some specific embodiments, the substrate wetting agent includes at least one of a polyether polyol and a fatty alcohol alkoxy polymer.

[0037] In some specific embodiments, the wax dispersion is polyethylene wax.

[0038] In a second aspect, the present invention provides a method for preparing the durable, stain-resistant and easy-to-apply two-component glaze paint according to any one of the first aspects, the preparation method comprising the following steps:

[0039] Stir and mix water, pigments, fillers and some other additives to obtain pigment and filler slurry;

[0040] Adding a substrate wetting agent and a wax-containing dispersion into the pigment and filler slurry, stirring and mixing, to obtain an intermediate mixed slurry;

[0041] Adding hydroxyl-containing acrylic emulsion and other remaining additives into the intermediate mixed slurry, the durable, stain-resistant and easy-to-apply two-component glaze paint is obtained.

[0042] In some specific embodiments, when preparing the pigment and filler slurry, other additives added are dispersant, defoamer accounting for 1 / 3 to 1 / 2 of the total weight of the defoamer, and thickener accounting for 1 / 3 to 1 / 2 of the total weight of the thickener.

[0043] The raw materials involved in the durable, stain-resistant, easy-to-apply two-component glaze paint and its preparation method provided by the embodiments of the present invention, unless otherwise specified or explained, can be directly commercially available products or can be homemade according to existing publicly available preparation methods; at the same time, the operating steps involved in the preparation method of the durable, stain-resistant, easy-to-apply two-component glaze paint, unless otherwise specified or explained, can be carried out according to the conventional preparation methods of existing coatings in the field or using existing equipment, and will not be described one by one here.

[0044] The present invention will be further described below in conjunction with specific examples. It should be understood that these examples are intended only to illustrate the present invention and are not intended to limit the scope of the present invention. The experimental methods in the following examples that do not specify specific conditions are usually measured according to national standards. If there is no corresponding national standard, then the conditions recommended by the manufacturer are followed.

[0045] Example 1

[0046] This example provides a durable, stain-resistant, and easy-to-apply two-component glaze paint, comprising the following components in parts by weight:

[0047] Component A: 60 parts of hydroxyl-containing acrylic emulsion, 0.4 parts of substrate wetting agent, 28 parts of pigments and fillers, 5.4 parts of water, 2.0 parts of wax-containing dispersion, 4.2 parts of other additives (0.8 parts of dispersant, 2 parts of film-forming aid, 0.2 parts of preservative, 0.2 parts of mildewproofing agent, 0.4 parts of defoaming agent, 0.6 parts of thickener);

[0048] Component B: water dispersible isocyanate curing agent;

[0049] The weight ratio of component A to component B is 100:20;

[0050] The hydroxyl-containing acrylic emulsion is Wanhua Archsol 8573 emulsion;

[0051] The substrate wetting agent is RP 0244, which has an HLB value of 6;

[0052] The pigment and filler is titanium dioxide;

[0053] The wax-containing dispersion is Mitsui Chemicals WH104;

[0054] The dispersant is TEGO-755W;

[0055] The film-forming aid is lauryl alcohol ester;

[0056] The preservative is MBS5050;

[0057] The mildewcide is Troy 7026;

[0058] The defoamer is Clariant NXZ;

[0059] The thickener is Gaotai XS-71;

[0060] The water-dispersible isocyanate curing agent is Aquolin 270 from Wanhua Chemical.

[0061] The preparation method of the above-mentioned durable, stain-resistant and easy-to-apply two-component glaze paint comprises the following steps:

[0062] Stir and mix water, pigments, fillers and some other additives to obtain pigment and filler slurry;

[0063] Adding a substrate wetting agent and a wax-containing dispersion into the pigment and filler slurry, stirring and mixing, to obtain an intermediate mixed slurry;

[0064] Adding hydroxyl-containing acrylic emulsion and other remaining additives to the intermediate mixed slurry to obtain the durable, stain-resistant and easy-to-apply two-component glaze paint;

[0065] Among them, when preparing the pigment and filler slurry, other additives added are dispersant, defoamer accounting for 1 / 2 of the total defoamer weight and thickener accounting for 1 / 2 of the total thickener weight.

[0066] Example 2

[0067] This example provides a durable, stain-resistant, easy-to-apply two-component glaze paint and a preparation method thereof. The only difference from Example 1 is that the amount of each raw material in the durable, stain-resistant, easy-to-apply two-component glaze paint is adjusted to: Component A: 55 parts of hydroxyl-containing acrylic emulsion, 0.5 parts of substrate wetting agent, 32 parts of pigment filler, 6.7 parts of water, 1.8 parts of wax-containing dispersion, 4 parts of other additives (0.8 parts of dispersant, 1.8 parts of film-forming aid, 0.2 parts of preservative, 0.2 parts of mildewcide, 0.4 parts of defoamer, 0.6 parts of thickener); Component B: water-dispersible isocyanate curing agent; the weight ratio of component A to component B is 100:20; the remaining steps and parameters are the same.

[0068] Example 3

[0069] This example provides a durable, stain-resistant, easy-to-apply two-component glaze paint and a preparation method thereof, which differs from Example 1 only in that the weight ratio of the component A to the component B is 100:18; the remaining steps and parameters are the same.

[0070] Comparative Example 1

[0071] The only difference between this example and Example 1 is that the substrate wetting agent is adjusted to EH-9, whose HLB value is 12.5; the other steps and parameters are the same.

[0072] Comparative Example 2

[0073] The only difference between this example and Example 1 is that the mass percentage of water in the A component is 20%, and specifically the amount of water is adjusted to 20 parts; the remaining steps and parameters are the same.

[0074] Comparative Example 3

[0075] The only difference between this example and Example 1 is that the amount of the wax-containing dispersion is adjusted to 0 parts (ie, no wax-containing dispersion is added); the remaining steps and parameters are the same.

[0076] Comparative Example 4

[0077] The only difference between this example and Example 1 is that the hydroxyl-containing acrylic emulsion is adjusted to Polyli water-based resin AH06, whose hydroxyl content is 2.0%; the remaining steps and parameters are the same.

[0078] Test Case

[0079] In this example, the performance of the two-component glaze paint provided in Examples 1 to 3 and Comparative Examples 1 to 3 was tested.

[0080] Early stain resistance test method: Under standard environment, use a Wenzheng ballpoint pen to paint on the paint film. After standing for 1 minute, use a cloth soaked in alcohol to wipe back and forth. If it can be completely wiped off, it passes the test. If it cannot be completely wiped off, it fails the test.

[0081] Long-term stain resistance test method: Under standard environment, use a Wenzheng brand ballpoint pen to paint on the paint film, let it stand for 7 days, and use a cloth soaked in alcohol to wipe it back and forth. If it can be completely wiped off, it passes the test, and if it cannot be completely wiped off, it fails the test;

[0082] Construction performance test method: Under standard conditions, on the putty wall that has been painted with primer, use a roller (the length of the roller bristles is greater than 1 cm) to dip in paint and then roll on the paint (rolling back and forth in a "W-shaped" manner, twice). After drying for 8 hours, use a roller (the length of the roller bristles is greater than 1 cm) to dip in paint and roll on the second coat of paint on the basis of the first coat that has been applied (rolling back and forth in a "W-shaped" manner, twice). Observe the entire process to see if there is any oil shrinkage. If there is no oil shrinkage, the test passes; if there is oil shrinkage, the test fails.

[0083] The test results are shown in Table 1.

[0084] Table 1

[0085]

[0086] It can be seen from Table 1 that: by comparing Comparative Example 1 with Example 1, it is found that when a wetting agent with a high HLB value is used, the product has better stain resistance, but poor construction performance, and oil shrinkage is likely to occur during construction, which cannot meet the requirements; by comparing Comparative Example 2 with Example 1, it is found that when the water content in component A is too high, the hydroxyl groups contained in the water affect the reaction between the hydroxyl groups in the acrylic emulsion and the curing agent, resulting in a decrease in the strength of the paint film and a decrease in stain resistance, which cannot meet the requirements; by comparing Comparative Example 3 with Example 1, it is found that when no wax-containing dispersion is added, the initial stain resistance is good, but the stain resistance is poor after a long time, and the use requirements are not met; by comparing Comparative Example 4 with Example 1, it is found that when the hydroxyl content of the acrylic emulsion in component A is low, its stain resistance will also be poor, and the use requirements cannot be met.

[0087] The foregoing is merely a specific embodiment of the present invention, which enables those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A durable, stain-resistant and easy-to-apply two-component glaze paint, characterized in that: The durable, stain-resistant and easy-to-apply two-component glaze paint comprises the following components in parts by weight: Component A: 55-65 parts of hydroxyl-containing acrylic emulsion, 0.2-0.5 parts of substrate wetting agent, 22-30 parts of pigments and fillers, 4-8 parts of water, 1.5-3.0 parts of wax-containing dispersion, and 1.8-5.0 parts of other additives; Component B: water dispersible isocyanate curing agent; Wherein, the mass percentage of water in the A component is ≤8%, and the HLB value of the substrate wetting agent is ≤6; The hydroxyl content of the hydroxyl-containing acrylic emulsion is greater than 4.5% based on solid content.

2. The durable, stain-resistant and easy-to-apply two-component glaze paint according to claim 1, characterized in that: The weight ratio of the A component to the B component is 100:(15-20).

3. The durable, stain-resistant and easy-to-apply two-component glaze paint according to claim 1, characterized in that: The pigments and fillers include one or more of titanium dioxide, heavy calcium powder and wollastonite.

4. The durable, stain-resistant and easy-to-apply two-component glaze paint according to claim 1, characterized in that: The other auxiliary agents include one or more of a dispersant, a film-forming auxiliary agent, a defoaming agent, a thickener, a preservative, a mildewproof agent and a dustproof agent.

5. The durable, stain-resistant and easy-to-apply two-component glaze paint according to claim 1, characterized in that: The mass percentage of NCO in the water-dispersible isocyanate curing agent is 19.5-22%; the other additives are composed of a dispersant, a film-forming aid, a defoaming agent, a thickener, a preservative, a mildew preventer and a dust preventer in a weight ratio of (0.4-1.2):(1-3):(01-0.6):(0.2-0.8):(0.1-0.5):(0.1-0.6):(0-1.0).

6. The durable, stain-resistant and easy-to-apply two-component glaze paint according to claim 1, characterized in that: The substrate wetting agent includes at least one of a polyether polyol and a fatty alcohol alkoxy polymer.

7. The durable, stain-resistant and easy-to-apply two-component glaze paint according to claim 1, characterized in that: The wax-containing dispersion is polyethylene wax.

8. A method for preparing the durable, stain-resistant and easy-to-apply two-component glaze paint according to any one of claims 1 to 7, characterized in that: The preparation method comprises the following steps: Stir and mix water, pigments, fillers and some other additives to obtain pigment and filler slurry; Adding a substrate wetting agent and a wax-containing dispersion into the pigment and filler slurry, stirring and mixing, to obtain an intermediate mixed slurry; Adding hydroxyl-containing acrylic emulsion and other remaining additives into the intermediate mixed slurry, the durable, stain-resistant and easy-to-apply two-component glaze paint is obtained.

9. The method for preparing the durable, stain-resistant and easy-to-apply two-component glaze paint according to claim 8, characterized in that: When preparing the pigment and filler slurry, other additives added are dispersant, defoamer accounting for 1 / 3 to 1 / 2 of the total weight of the defoamer, and thickener accounting for 1 / 3 to 1 / 2 of the total weight of the thickener.

Images