A durable, stain-resistant, easy-to-apply two-component glaze paint and its preparation method

Abstract

The present invention relates to a durable, stain-resistant, and easy-to-apply two-component glaze paint and a preparation method thereof, and relates to the technical field of coatings. The durable, stain-resistant, and easy-to-apply two-component glaze paint comprises the following components, measured by weight: component A: 55-65 parts of a hydroxyl-containing acrylic emulsion, 0.2-0.5 parts of a substrate wetting agent, 22-30 parts of a pigment and filler, 4-8 parts of water, 1.5-3.0 parts of a wax-containing dispersion, and 1.8-5.0 parts of other additives; and component B: a water-dispersible isocyanate curing agent, etc. The two-component latex paint provided by the present invention is based on the reaction of the hydroxyl groups in component A with the isocyanate groups in component B, thereby cross-linking and curing to form a dense paint film. Then, by reducing the overall moisture content, adding a high proportion of the wax-containing dispersion, 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, without abnormalities such as oil shrinkage, thereby making up for the shortcomings of the existing technology.

Description

Technical Field

[0001] The present 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 held a dominant position, thanks to its low cost, excellent decorative effects, and excellent substrate protection. It not only provides a rich variety of colors and textures for interior and exterior walls, but also offers a degree of resistance to daily wear and tear, extending the lifespan of buildings. However, as people's demands for higher-quality living environments continue to rise, the limitations of traditional latex paint are becoming increasingly apparent, particularly its lack of stain resistance.

[0003] Traditional latex paints often struggle to effectively resist common stains in everyday life, such as oil, water, and dust. Once contaminated, they are often difficult to restore to their original state with a simple wipe, which not only affects the aesthetics of the wall but also increases the cost and difficulty of maintenance. This shortcoming has limited the application of latex paint in high-end decoration, especially in places with extremely high requirements for cleanliness and aesthetics, such as home living rooms, restaurants, hospitals, and schools.

[0004] Given this, there is an urgent need for a new coating product that maintains the inherent advantages of latex paint while significantly improving stain resistance. As an innovative coating solution, water-based two-component glaze paint has attracted considerable attention for its environmental friendliness, high gloss, and excellent durability. However, ensuring good workability while further enhancing stain resistance remains a major challenge in current coatings technology research and development.

[0005] Therefore, the development of 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. It 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 two-component glaze paint that is durable, stain-resistant and easy to construct and a preparation method thereof.

[0007] In a first aspect, the present invention provides a two-component glaze paint that is durable, stain-resistant, and easy to apply. The 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 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 component A 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 pigments and fillers include 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 mildew preventer and a dust preventer.

[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 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).

[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 base material wetting agent and a wax-containing dispersion to 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 to obtain the durable, stain-resistant and easy-to-apply two-component glaze paint.

[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] An 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. 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, without abnormalities such as oil shrinkage, thereby making up for the shortcomings of the existing technology. DETAILED DESCRIPTION

[0025] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction 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 making creative efforts 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 two-component glaze paint that is durable, stain-resistant, and easy to apply. The 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 dispersion, and 1.8-5.0 parts of other additives;

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

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

[0031] The present invention provides for the first time 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. 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, without abnormalities such as oil shrinkage, thereby making up for the shortcomings of the existing technology.

[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 suppressant.

[0035] In some specific embodiments, 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 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 base material wetting agent and a wax-containing dispersion to 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 to obtain the durable, stain-resistant and easy-to-apply two-component glaze paint.

[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 and 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 used as commercially available products or can be homemade according to existing public preparation methods; at the same time, the operating steps involved in the preparation method of the durable, stain-resistant and 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 to illustrate the present invention only and are not intended to limit the scope of the invention. The experimental methods in the following examples where specific conditions are not specified are generally measured in accordance with national standards. If there are no corresponding national standards, then the methods are carried out in accordance with general international standards, conventional conditions, or the conditions recommended by the manufacturer.

[0045] Example 1

[0046] This example provides a long-lasting, 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 mildewcide, 0.4 parts of defoamer, 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 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 mildew inhibitor is Troy 7026;

[0058] The defoamer is Clariant NXZ;

[0059] The thickener is Gaotai XS-71;

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

[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 base material wetting agent and a wax-containing dispersion to the pigment and filler slurry, stirring and mixing, to obtain an intermediate mixed slurry;

[0064] Adding hydroxyl-containing acrylic emulsion and remaining other 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, and 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, and 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 defoaming agent, 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, and easy-to-apply two-component glaze paint and a preparation method thereof. The only difference from Example 1 is 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 remaining 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%, 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] This example performs a performance test on the two-component glaze paints provided in Examples 1 to 3 and Comparative Examples 1 to 3.

[0080] Early stain resistance test method: Under standard conditions, use a Wenzheng brand ballpoint pen to paint on the paint film. After the paint is left for 1 minute, use a cloth soaked in alcohol to wipe back and forth. If the paint 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 conditions, use a Wenzheng brand ballpoint pen to paint on the paint film. After painting, let it stand for 7 days. 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.

[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 the paint and then roll it on (rolling back and forth in a "W-shaped" manner, 2 times). After it has dried for 8 hours, use a roller (the length of the roller bristles is greater than 1 cm) to dip the paint and roll on the second coat of paint on the basis of the first coat (rolling back and forth in a "W-shaped" manner, 2 times). Observe the entire process to see if there is any oil shrinkage. If there is no oil shrinkage, the test is passed; if there is oil shrinkage, the test is failed.

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

[0084] Table 1

[0085]

[0086] As shown in Table 1, when a wetting agent with a high HLB value is used, the product exhibits better stain resistance, but poor workability, with oil shrinkage easily occurring during construction, failing to meet the requirements. Comparison of Comparative Example 2 with Example 1 reveals that when the water content in component A is too high, the hydroxyl groups in the water affect the reaction between the hydroxyl groups in the acrylic emulsion and the curing agent, resulting in decreased film strength and stain resistance, failing to meet the requirements. Comparison of Comparative Example 3 with Example 1 reveals that when no wax-containing dispersion is added, the initial stain resistance is good, but after a long period of time, the stain resistance is poor, failing to meet the requirements. Comparison of Comparative Example 4 with Example 1 reveals that when the hydroxyl content of the acrylic emulsion in component A is low, the stain resistance is also poor, failing to meet the requirements.

[0087] The foregoing description is intended only to provide specific embodiments of the present invention, which will enable those skilled in the art to understand and implement the present invention. Various modifications to these embodiments will be readily 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 is not intended to be limited to the embodiments shown herein, but is intended to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A long-lasting, 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 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 component A 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 component A to the component B 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 mildew preventer and a dust preventer.

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 inhibitor and a dustproof agent 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 base material wetting agent and a wax-containing dispersion to 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 to obtain the durable, stain-resistant and easy-to-apply two-component glaze paint.

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