Polyurea gloss oil for high-performance ceramic tiles and application of polyurea gloss oil

Abstract

The invention relates to polyurea gloss oil for a high-performance ceramic tile and application of the polyurea gloss oil. The coating is prepared from polyaspartic acid ester resin, polyester resin, polyisocyanate, an ultraviolet light absorber and a flatting agent. According to the invention, polyaspartic acid ester resin is used as matrix resin, so that a coating film has good adhesive force with surfaces difficult to attach such as ceramic and glass, and the coating has a waterproof function due to good water resistance of polyurea; by adding the polyester resin, the toughness of the paint film is improved, and the problem that the paint film becomes brittle due to too low environment temperature is avoided; the paint film is cured by adding polyisocyanate; the weather resistance of a protected workpiece is improved by adding the ultraviolet absorbent, and the paint film has a mirror surface leveling effect by adding the leveling agent; the used resins belong to a high-solid low-viscosity type, so that the coating has ultralow VOC (volatile organic compound) environment-friendly characteristic, the two components can be directly constructed after being mixed, and the mixed solid content is greater than or equal to 95%.

Description

Technical Field

[0001] The invention belongs to the application fields of tile protection, brick joint filling and overall ground waterproofing, and relates to a high-performance polyurea varnish for tiles composed of polyaspartic acid ester resin, polyester resin, polyisocyanate, ultraviolet absorber and leveling agent and a preparation method thereof. Background Art

[0002] At present, the floor tiles of bathrooms, outdoor swimming pool walls, and landscape pools in my country are exposed all year round, which leads to damage after bumping and discoloration after sunlight. In addition, the tiles themselves do not have waterproof function, and a waterproof coating process needs to be added before installing the tiles. The present invention is intended to coat the tiles with polyurea varnish as a whole after installation, and protect the tiles as a whole according to the characteristics of this product, improve the bump resistance, weather resistance and overall water resistance, and eliminate the waterproof coating process before installing the tiles.

[0003] The use of polyaspartic acid resin solves the adhesion problem between varnish and tiles, making the coating waterproof as a whole. The high solid and low viscosity properties of the resin give the coating ultra-low VOC properties.

[0004] The use of polyester resin improves the flexibility of the paint film, making the tile coated with polyurea varnish more resistant to bumps and bumps, and will not cause the paint film to become brittle, especially when the ambient temperature is extremely low.

[0005] By adding UV absorbers, the UV shielding ability of polyurea varnish is improved, thereby effectively protecting the tiles from discoloration under sunlight conditions.

[0006] By adding leveling agent, polyurea varnish has mirror leveling effect, which greatly improves the decorative effect of the coating. Summary of the invention

[0007] The purpose of the present invention is to improve the protection of ceramic tiles by coating polyurea varnish, greatly reducing the probability of ceramic tiles being damaged due to bumps; the polyurea varnish is transparent and bright, so that the decorativeness of the ceramic tiles is improved; and because it has the characteristic of shielding ultraviolet light waves, the ceramic tiles are not easy to change color; the polyurea varnish has excellent water resistance, and can save the waterproof coating process on the ground and wall where the ceramic tiles are installed. It is composed of polyaspartic acid ester resin, polyester resin, polyisocyanate, ultraviolet absorber, and leveling agent.

[0008] To achieve the above purpose, the present invention discloses the following technical contents: A high-performance polyurea varnish for ceramic tiles, characterized in that the coating is composed of the following raw materials in parts by weight: Main raw material ratio (1) Preparation of component 1 Polyaspartic acid resin F520 88.2 Polyester resin SY944 9.8 Ultraviolet absorber UV400 1 Leveling agent EFKA3600 1.0 Preparation of component 2 Polyisocyanate HT-100 100 Construction ratio Component 1 50 Component 2 50 Description of the above ingredients: The polyaspartic acid ester resin is F520 from Feiyang Company, the polyester resin is SY944 from Covestro Company, the polyisocyanate is HT-100 from Wanhua Company, the ultraviolet absorber is UV-400 from BASF Company, and the leveling agent is EFKA-3600 from BASF Company.

[0009] The present invention further discloses a method for preparing a high-performance polyurea varnish for ceramic tiles, which is characterized by the following steps: (1) Preparation of component 1 Add polyaspartic acid resin F520 into a stainless steel basin, stir at a low speed of 300-500 rpm, then add polyester resin SY944, then add ultraviolet absorber UV400, add leveling agent EFKA3600, then stir at a high speed of 1200-1500 rpm for 30 minutes, filter and package after passing the test; (2) Preparation of component 2 Use filling machine to pack polyisocyanate HT-100 according to the formula quantity.

[0010] (3) Paint mixing during construction Add component 1 to the paint mixing can, add component 2 according to the ratio, stir with a paint mixing stick for 1-2 minutes and apply on the tile surface.

[0011] The present invention uses polyaspartic acid ester resin F520 as the main resin, which has excellent adhesion to substrates such as glass, ceramic tiles, and aluminum alloys. Since F520 resin has high solid and low viscosity characteristics, its solid content is 96% and its viscosity is 700-2000mPa.s, thereby reducing the VOC emission of the system. The polyurea varnish prepared by using F520 resin also has good water resistance, and the waterproof coating of the bottom layer of the ceramic tile can be omitted. Directly applying polyurea varnish on this surface can also play a waterproof function; by adding polyester SY944, the flexibility of the paint film can be effectively improved, and the brittleness of the polyurea varnish film caused by too low temperature can be avoided. SY944 resin also has high solid and low viscosity characteristics, its solid content is 96%, and its rotational viscosity is 4000-7000mPa.s, thereby reducing the VOC emission of the system; by adding ultraviolet absorber Tinuvin UV400 can shield most of the ultraviolet light from the polyurea paint film. The ultraviolet absorber UV400 belongs to the triazine product, which has an excellent absorption and shielding effect on the short-wave light waves with the strongest energy, and can effectively protect the tiles from obvious discoloration due to sunlight. The solid content of UV400 is 100% and does not contain VOC. The leveling property of the polyurea paint film is improved by adding the leveling agent EFKA3600. EFKA3600 is a fluorine-modified acrylic system product, which helps the paint film to form a mirror effect. The polyurea paint film after adding is smoother and brighter, and the solid content of EFKA3600 is 100% and does not contain VOC. Polyisocyanate HT-100 is added to solidify the paint film. The HT-100 curing agent is a trimer structure, which has the characteristics of fast drying, high solid and low viscosity. Its solid content is 100% and the viscosity is 1750-3250mPa.s. It can be directly coated or brushed without adding organic solvents.

[0012] The high-performance polyurea varnish for ceramic tiles disclosed in the present invention has the following positive effects compared with the prior art: The polyaspartic resin F520 used has good adhesion on the surfaces of glass, ceramics and tiles, ensuring that the paint film on the tiles is not easy to fall off after being coated with polyurea varnish.

[0013] The polyurea used has excellent water resistance so the system has waterproof function.

[0014] Because of the addition of polyester resin, the paint film has better low-temperature resistance than other polyurea coating products on the market, and the paint film will not become brittle and crack under extremely low temperature conditions.

[0015] The materials used in the present invention are all high-solid and low-VOC types, and the VOC in the polyurea varnish is ≤5%, which is an environmentally friendly product.

[0016] The addition of triazine UV absorber Tinuvin 400 can shield most of the short-wave UV waves with the strongest destructive energy, better protecting the tiles from discoloration due to sunlight. DETAILED DESCRIPTION

[0017] The present invention is described below by specific embodiments. Unless otherwise specified, the technical means used in the present invention are methods known to those skilled in the art. In addition, the embodiments should be understood as illustrative rather than limiting the scope of the present invention, and the essence and scope of the present invention are limited only by the claims. For those skilled in the art, various changes or modifications to the material composition and dosage in these embodiments, without departing from the essence and scope of the present invention, also belong to the protection scope of the present invention.

[0018] The raw materials and reagents used in the present invention are all commercially available, wherein the polyaspartic acid resin F520 is purchased from Shenzhen Feiyang Junyan New Materials Co., Ltd., the polyester resin SY944 is purchased from DSM, the ultraviolet absorber Tinuvin 400 is purchased from BASF, the leveling agent EFKA-3600 is purchased from BASF, and the curing agent polyisocyanate HT-100 is purchased from Wanhua Chemical Co., Ltd. Example

[0019] Polyurea varnish for high performance ceramic tiles Main raw material ratio: (1) Preparation of component 1 Polyaspartic acid resin F520 88.2 Polyester resin SY944 9.8 Ultraviolet absorber UV400 1 Leveling agent EFKA3600 1.0 (2) Preparation of component 2 Polyisocyanate HT-100 100 (3) Construction ratio Component 1 50 Component 2 50 Example

[0020] Preparation method of polyurea varnish for high-performance ceramic tiles (1) Preparation of component 1 Add polyaspartic acid resin F520 according to the formula in a stainless steel basin, stir at a low speed of 300-500 rpm, then add polyester resin SY944, then add ultraviolet absorber UV400, add leveling agent EFKA3600, then switch to high speed 1200-1500 rpm and stir for 30 minutes. After passing the test, filter and package; (2) Preparation of component 2 Use filling machine to pack polyisocyanate HT-100 according to the formula quantity.

[0021] (3) Paint mixing during construction Before painting or coating, add component 1 to the paint mixing can, add component 2 according to the ratio, stir with a paint mixing stick for 1-2 minutes and then apply on the tile surface. The mixed polyurea varnish needs to be used up within 1 hour. If more than 1 hour has passed, the polyurea varnish that has been added with curing agent cannot be used anymore.

[0022]

[0023]

[0024] Example 3 Effects of adding different amounts of polyaspartic acid resin F520 and polyester resin SY944 on adhesion and -40°C impact resistance

[0025] The results show that the ratio of F520 polyaspartic acid resin to SY944 polyester resin at 10:0 and 9:1 can meet the cross-cut adhesion level 0, while the -40℃ impact resistance of the ratio of 10:0 does not meet the technical indicators. With the increase of the proportion of SY944 polyester resin, the adhesion of polyurea varnish on tiles becomes worse, and the -40℃ impact resistance is improved. Under the premise of meeting the adhesion of the tile surface, the -40℃ impact resistance is ensured. Therefore, the ratio of F520 polyaspartic acid resin to SY944 polyester resin is 9:1.

[0026] Example 4 Examples of practical applications

[0027] Conclusion: The high-performance polyurea varnish for ceramic tiles of the present invention has excellent adhesion to the ceramic tile surface, and the paint film still has good impact resistance under -40°C environmental conditions; the product can have a waterproof function due to its excellent water resistance; the polyurea varnish of the present invention is an ultra-high solid content environmentally friendly coating product, and the mixed solid content is ≥95%; the paint film has good absorption and shielding functions for ultraviolet light waves, ensuring that the ceramic tiles coated with the polyurea varnish will not undergo obvious discoloration under long-term sunlight exposure conditions.

Claims

1. A high-performance polyurea varnish for ceramic tiles, characterized in that The primer is composed of the following raw materials in parts by weight: Main raw material ratio (1) Preparation of component 1 Polyaspartic acid resin F520 88.2 Polyester resin SY944 9.8 UV absorber Tinuvin 400 1 Leveling agent EFKA3600 1.0 Preparation of component 2 Polyisocyanate HT-100 100 Construction ratio Component 1 50 Component 2:

50.

2. The method for preparing a high-performance polyurea varnish for ceramic tiles according to claim 1, characterized in that Proceed as follows: (1) Preparation of component 1 Add polyaspartic acid resin F520 into a stainless steel basin, stir at a low speed of 300-500 rpm, then add polyester resin SY944, then add ultraviolet absorber UV400, add leveling agent EFKA3600, then stir at a high speed of 1200-1500 rpm for 30 minutes, filter and package after passing the test; (2) Preparation of component 2 Use filling machine to pack polyisocyanate HT-100 according to the formula quantity; (3) Paint mixing during construction Add component 1 to the paint mixing can, add component 2 according to the ratio, stir with a paint mixing stick for 1-2 minutes and apply on the tile surface.

3. Application of the polyurea varnish for high-performance ceramic tiles as claimed in claim 1 for ceramic tile surface coating.

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