Scratch-resistant coating for pen writing wall cloth and preparation method of scratch-resistant coating
By combining self-made polyester resin with modified polysiloxane masterbatch and erucamide, the problems of insufficient transparency and scratch resistance of pen-writing wallpaper coatings were solved, achieving a coating effect with high transparency and scratch resistance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-01-20
- Publication Date
- 2026-04-14
AI Technical Summary
Existing pen-writing wallpaper coatings have insufficient transparency and limited scratch resistance, affecting aesthetics and lifespan.
The coating uses a combination of self-made polyester resin, modified polysiloxane masterbatch, and erucamide to improve transparency and scratch resistance through chemical bonding and surface migration mechanisms. The coating preparation process includes premixing, melt extrusion, and screening.
It improves the transparency and scratch resistance of the coating, extends its service life, and maintains the original color and texture of the wallpaper.
Smart Images
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Abstract
Description
Technical Field
[0001] This invention belongs to the field of coating technology, specifically relating to a scratch-resistant coating for pen-writing wallpaper and its preparation method. Background Technology
[0002] Writing wallpaper is a wall decoration material that combines decoration and functionality. By coating the surface of the wallpaper substrate with a specific functional coating, it allows for repeated writing and drawing with whiteboard markers, pens, and other writing tools, and easy erasing. It is widely used in various settings such as children's rooms, school classrooms, office conference rooms, and early childhood education centers. It satisfies the aesthetic needs of spatial decoration while providing a convenient medium for creative expression, knowledge transfer, and interactive communication. With the increasing demand for functional and personalized spaces, the market demand for writing wallpaper continues to grow, giving rise to many brands specializing in this field. Among the more well-known brands is Vescom's WallWorks series of writing wallpaper.
[0003] However, although many writing wall coverings have emerged on the market, they generally have two shortcomings that are difficult to balance: First, they lack transparency, and after the coating cures, they easily cover up the original pattern and color of the wall covering, affecting the saturation and original aesthetics of the wall covering. Second, they have limited scratch resistance. Under the slight scratches of daily writing, cleaning, or even moving furniture, the coating will show scratches, matte bands, or partial peeling, which can easily shorten its service life.
[0004] Therefore, how to give the surface higher scratch resistance while maintaining the original color layers and clear texture of the wallpaper has become the key breakthrough that needs to be made in the pen-writing wallpaper coating technology. Summary of the Invention
[0005] The purpose of this invention is to provide a scratch-resistant coating for pen-writing wallpaper and its preparation method, which solves the problems of poor transparency and scratch resistance in existing pen-writing wallpaper coating technologies.
[0006] The objective of this invention can be achieved through the following technical solutions: The first aspect of the present invention provides a method for preparing a scratch-resistant coating for pen-writing wallcovering, comprising the following steps: cleaning dust and oil stains from the surface of the pen-writing wallcovering, and after plastering, puttingtying, and sanding, applying paint to the surface of the pen-writing wallcovering using a roller coating machine, and drying to obtain a scratch-resistant coating for pen-writing wallcovering.
[0007] As a preferred embodiment of the present invention, the thickness of the coating applied by the roller coating machine is 0.2-0.5 mm; and the drying temperature is 35-45℃.
[0008] As a preferred embodiment of the present invention, the raw materials for preparing the coating, by weight, include: The ingredients are: 75-85 parts self-made polyester resin, 2-3 parts modified polysiloxane masterbatch, 1-2.5 parts erucamide, 6-8 parts curing agent, 1-1.5 parts leveling agent, 0.2-0.4 parts antioxidant, and 1-1.2 parts benzoin.
[0009] As a preferred embodiment of the present invention, the self-made polyester resin comprises the following parts by weight: 45-65 parts neopentyl glycol, 48-75 parts hexanediol, 70-85 parts terephthalic acid, 10-14 parts isophthalic acid, 4-9 parts modifier, 5-8 parts ε-polylysine, 5-9 parts acrylic resin, and 0.1-0.2 parts monobutyltin oxide.
[0010] Furthermore, the modified material is prepared by mixing dodecanoic acid, cyclohexane oxide and tetrabutyl titanate, purging with nitrogen, and stirring under controlled temperature to obtain the modified material.
[0011] Furthermore, the molar ratio of dodecanoic acid to cyclohexane oxide is 1:2-2.2; the amount of tetrabutyl titanate added is 4-5% of the total mass of dodecanoic acid and cyclohexane oxide.
[0012] Furthermore, the temperature of the temperature-controlled stirring is 75-80℃, and the time is 1.5-2h.
[0013] Furthermore, the acrylic resin has an acid value of 20-40 mgKOH / g and a Tg of 40-50℃.
[0014] Preferably, the acrylic resin has an acid value of 33 mgKOH / g and a Tg of 45℃.
[0015] Furthermore, the method for preparing the self-made polyester resin is as follows: Under nitrogen atmosphere, neopentyl glycol and hexanediol are mixed and stirred under controlled temperature. Then, terephthalic acid, modifier, acrylic resin, ε-polylysine and monobutyltin oxide are added sequentially and kept at controlled temperature. The mixture is then cooled down until isophthalic acid is added and kept at that temperature. The acid value is measured under vacuum, the vacuum is broken and the material is discharged to obtain the self-made polyester resin.
[0016] Furthermore, the temperature for temperature-controlled stirring is 155-165℃ for 30-60 minutes; the temperature for temperature control and heat preservation is 245-255℃ until the resin becomes transparent; the temperature for cooling is 225-235℃; the temperature for heat preservation with isophthalic acid is 1.5-2 hours; and the acid value is measured by vacuuming until the acid value is 31-35 mgKOH / g.
[0017] As a preferred embodiment of the present invention, the curing agent includes triglycidyl isocyanurate; the leveling agent includes at least one of leveling agent PV-88, leveling agent GLP-503 and leveling agent GLP505; and the antioxidant includes at least one of antioxidant 168, antioxidant 1076 and antioxidant 1010.
[0018] As a preferred embodiment of the present invention, the method for preparing the coating includes: The raw materials are premixed and then melt-extruded using a twin-screw extruder. After being pressed, crushed, and sieved, the coating is obtained.
[0019] Furthermore, the main screw of the twin-screw extruder has a rotational speed of 180-200 r / min, a screw section temperature range of 170-185℃, and a die head temperature of 190-200℃; the sieving is performed through a 150-160 mesh sieve.
[0020] A second aspect of the present invention provides a scratch-resistant coating for room temperature pen-writing wallpaper prepared by the above-described preparation method.
[0021] The beneficial effects of this invention are: (1) In order to obtain a high-transparency coating suitable for pen-written wall coverings, the present invention adaptably selects acrylic resin with an acid value and viscosity within a suitable range to chemically bond with polyester molecular chains, which effectively reduces the refractive index of polyester resin and improves transparency. At the same time, the present invention also adds ε-polylysine to disrupt the orderly arrangement of molecular chains in the polyester resin system molecular chains, and adds modifiers to introduce ester groups, hydroxyl groups, and cyclohexyl groups, and reduces the crystallinity of the system with their certain degree of branching. Therefore, the self-made polyester resin obtained in this way can effectively improve its transparency when used in the preparation of coatings.
[0022] (2) In this invention, the modified material is prepared by first preparing dodecanoic acid and cyclohexane oxide and then added to the self-made polyester resin system. Compared with the one-pot method of directly adding the two raw materials, the pre-prepared modified material can reduce the generation of by-products and interference with other components, which is beneficial to increasing the transparency of the system.
[0023] (3) The present invention incorporates modified polysiloxane masterbatch, which has a high molecular weight, large molecular volume and small intermolecular forces, resulting in a low surface energy and a tendency to migrate to the surface; while the added erucamide with a small surface tension can easily migrate to the surface of the finished product to form a thin lubricating layer, so the two can work together to increase the scratch resistance of the coating. Detailed Implementation
[0024] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.
[0025] The acrylic resin used in this invention is of type MB-7922, brand: Mitsubishi, with an acid value of 33 mgKOH / g and a Tg of 45℃, and was purchased from Guangzhou Jinkai Chemical Co., Ltd. The modified polysiloxane masterbatch used: containing 50% non-reactive ultra-high molecular weight silica gel, model: PP50S12, purchased from: Nagase (China) Co., Ltd. The above will not be elaborated upon further.
[0026] Example 1 A method for preparing a scratch-resistant coating for pen-writing wallcovering includes the following steps: cleaning dust and oil stains from the surface of the pen-writing wallcovering, and after plastering, puttingtying, and sanding, applying paint to the surface of the pen-writing wallcovering using a roller coating machine, and drying to obtain the scratch-resistant coating for pen-writing wallcovering. The thickness of the coating applied by the roller coating machine is 0.2 mm; the drying temperature is 45°C. The raw materials for preparing the coating, by weight, include: 75 parts of self-made polyester resin, 2 parts of modified polysiloxane masterbatch, 2.5 parts of erucamide, 6 parts of curing agent, 1.2 parts of leveling agent, 0.2 parts of antioxidant, and 1 part of benzoin; The curing agent includes triglycidyl isocyanurate; The leveling agent includes leveling agent PV-88; The antioxidant includes antioxidant 1076; The self-made polyester resin comprises the following parts by weight: 45 parts neopentyl glycol, 75 parts hexanediol, 70 parts terephthalic acid, 10 parts isophthalic acid, 9 parts modifier, 5 parts ε-polylysine, 5 parts acrylic resin, and 0.1 parts monobutyltin oxide; The modified material is prepared by mixing dodecanoic acid, cyclohexane oxide and tetrabutyl titanate in a molar ratio of 1:2.1, purging with nitrogen, and stirring at 75°C for 1.5 hours to obtain the modified material. The amount of tetrabutyl titanate added is 4.5% of the total mass of dodecanoic acid and cyclohexane oxide; The method for preparing the self-made polyester resin is as follows: Under nitrogen atmosphere, neopentyl glycol and hexanediol were mixed and stirred at 155°C for 60 minutes. Then, terephthalic acid, modifier, acrylic resin, ε-polylysine and monobutyltin oxide were added sequentially and kept at 245°C until the resin became transparent. The temperature was then lowered to 225°C and isophthalic acid was added and kept at 1.5 hours. The acid value was measured under vacuum and found to be 31 mgKOH / g. The vacuum was then broken and the material was discharged to obtain the self-made polyester resin. The preparation method of the coating includes: The raw materials are premixed and then melt-extruded using a twin-screw extruder. After being pressed, crushed, and sieved, the coating is obtained. The twin-screw extruder has a main screw speed of 180 r / min, a screw section temperature range of 178℃, and a die head temperature of 190℃; the sieving is a 150 mesh sieve.
[0027] Example 2 A method for preparing a scratch-resistant coating for pen-writing wallcovering includes the following steps: cleaning dust and oil stains from the surface of the pen-writing wallcovering, and after plastering, puttingtying, and sanding, applying paint to the surface of the pen-writing wallcovering using a roller coating machine, and drying to obtain the scratch-resistant coating for pen-writing wallcovering. The thickness of the coating applied by the roller coating machine is 0.3 mm; the drying temperature is 35°C. The raw materials for preparing the coating, by weight, include: 80 parts of self-made polyester resin, 3 parts of modified polysiloxane masterbatch, 1 part of erucamide, 7 parts of curing agent, 1.5 parts of leveling agent, 0.3 parts of antioxidant, and 1.1 parts of benzoin; The curing agent includes triglycidyl isocyanurate; The leveling agent includes leveling agent GLP-503; The antioxidant includes antioxidant 168; The self-made polyester resin comprises the following parts by weight: 65 parts neopentyl glycol, 48 parts hexanediol, 85 parts terephthalic acid, 12 parts isophthalic acid, 4 parts modifier, 8 parts ε-polylysine, 9 parts acrylic resin, and 0.15 parts monobutyltin oxide. The modified material is prepared by mixing dodecanoic acid, cyclohexane oxide and tetrabutyl titanate in a molar ratio of 1:2, purging with nitrogen, and stirring at 80°C for 2 hours to obtain the modified material. The amount of tetrabutyl titanate added is 4% of the total mass of dodecanoic acid and cyclohexane oxide; The method for preparing the self-made polyester resin is as follows: Under nitrogen atmosphere, neopentyl glycol and hexanediol were mixed and stirred at 165°C for 30 minutes. Then, terephthalic acid, modifier, acrylic resin, ε-polylysine and monobutyltin oxide were added sequentially and kept at 250°C until the resin became transparent. The temperature was then lowered to 235°C and isophthalic acid was added and kept at 2 hours. The acid value was measured under vacuum and found to be 32 mgKOH / g. The vacuum was then broken and the material was discharged to obtain the self-made polyester resin. The preparation method of the coating includes: The raw materials are premixed and then melt-extruded using a twin-screw extruder. After being pressed, crushed, and sieved, the coating is obtained. The twin-screw extruder has a main screw speed of 190 r / min, a screw section temperature range of 170℃, and a die head temperature of 195℃; the sieving is a 160 mesh sieve.
[0028] Example 3 A method for preparing a scratch-resistant coating for pen-writing wallcovering includes the following steps: cleaning dust and oil stains from the surface of the pen-writing wallcovering, and after plastering, puttingtying, and sanding, applying paint to the surface of the pen-writing wallcovering using a roller coating machine, and drying to obtain the scratch-resistant coating for pen-writing wallcovering. The thickness of the coating applied by the roller coating machine is 0.5 mm; the drying temperature is 40°C. The raw materials for preparing the coating, by weight, include: The mixture consisted of 85 parts of self-made polyester resin, 2.5 parts of modified polysiloxane masterbatch, 1.8 parts of erucamide, 8 parts of curing agent, 1 part of leveling agent, 0.4 parts of antioxidant, and 1.2 parts of benzoin. The curing agent includes triglycidyl isocyanurate; The leveling agent includes leveling agent GLP505; The antioxidant includes antioxidant 1010; The self-made polyester resin comprises the following parts by weight: 55 parts neopentyl glycol, 62 parts hexanediol, 78 parts terephthalic acid, 14 parts isophthalic acid, 6.5 parts modifier, 6.5 parts ε-polylysine, 7 parts acrylic resin, and 0.2 parts monobutyltin oxide; The modified material is prepared by mixing dodecanoic acid, cyclohexane oxide and tetrabutyl titanate in a molar ratio of 1:2.2, purging with nitrogen, and stirring at 78°C for 2 hours to obtain the modified material. The amount of tetrabutyl titanate added is 5% of the total mass of dodecanoic acid and cyclohexane oxide; The method for preparing the self-made polyester resin is as follows: Under nitrogen atmosphere, neopentyl glycol and hexanediol were mixed and stirred at 160°C for 45 minutes. Then, terephthalic acid, modifier, acrylic resin, ε-polylysine and monobutyltin oxide were added sequentially and kept at 255°C until the resin became transparent. The temperature was then lowered to 230°C and isophthalic acid was added and kept for 2 hours. The acid value was measured under vacuum and found to be 35 mgKOH / g. The vacuum was then broken and the material was discharged to obtain the self-made polyester resin. The preparation method of the coating includes: The raw materials are premixed and then melt-extruded using a twin-screw extruder. After being pressed, crushed, and sieved, the coating is obtained. The twin-screw extruder has a main screw speed of 200 r / min, a screw section temperature range of 185℃, and a die head temperature of 200℃; the sieving is a 160 mesh sieve.
[0029] Comparative Example 1 Compared to Example 3, the difference is that acrylic resin is not added, but everything else remains the same.
[0030] Comparative Example 2 Compared to Example 3, the difference is that ε-polylysine is not added, while the rest remains the same.
[0031] Comparative Example 3 Compared with Example 3, the difference is that no modified material is added, but everything else remains the same.
[0032] Comparative Example 4 Compared with Example 3, the difference is that the modified raw material is added directly in one pot, that is: The self-made polyester resin comprises the following parts by weight: 55 parts neopentyl glycol, 62 parts hexanediol, 78 parts terephthalic acid, 14 parts isophthalic acid, 6.5 parts modifier, 3.2 parts dodecanoic acid, 3 parts cyclohexane oxide, 0.3 parts tetrabutyl titanate, 6.5 parts ε-polylysine, 7 parts acrylic resin, and 0.2 parts monobutyltin oxide; The method for preparing the self-made polyester resin is as follows: Under nitrogen atmosphere, neopentyl glycol and hexanediol were mixed and stirred at 160°C for 45 minutes. Then, terephthalic acid, dodecanoic acid, cyclohexane oxide, tetrabutyl titanate, acrylic resin, ε-polylysine, and monobutyltin oxide were added sequentially and kept at 255°C until the resin became transparent. The temperature was then lowered to 230°C and isophthalic acid was added and kept for 2 hours. The acid value was measured under vacuum and found to be 35 mg KOH / g. The vacuum was then broken and the material was discharged to obtain the self-made polyester resin. Everything else remains the same.
[0033] Comparative Example 5 Compared with Example 3, the difference is that no modified polysiloxane masterbatch is added, while the rest remains the same.
[0034] Comparative Example 6 Compared with Example 3, the difference is that erucamide is not added, but everything else remains the same.
[0035] Test case (1) Transmittance test: Referring to GB / T 2410-2008, the coatings prepared in Examples 1-3 and Comparative Examples 1-4 were sprayed onto standard square pieces with the same thickness. After curing, the transmittance was tested at room temperature using a transmittance haze meter with a C light source. The results are shown in Table 1. (2) Scratch resistance test: The coatings prepared in Examples 1-3 and Comparative Examples 4-5 were uniformly rolled onto 10cm×5cm×5cm 25# tinplate test samples and dried at 200℃ for 5min to obtain test samples. The scratch resistance of the test samples was tested according to GB / T 9279-2007. The results are shown in Table 1.
[0036] Table 1 As can be seen from the comparison of the transmittance data of the examples and comparative examples in Table 1, the acrylic resin selected in this invention can effectively reduce the refractive index of the polyester resin and improve its transparency. At the same time, the ε-polylysine added in this invention can penetrate into the molecular chain of the polyester resin system and disrupt the orderly arrangement of the molecular chain. The added modifier can introduce ester groups, hydroxyl groups, and cyclohexyl groups and reduce the crystallinity of the system with their certain degree of branching. Therefore, the self-made polyester resin obtained in this way can effectively improve its transparency when used for coating preparation. As can be seen from the comparison of scratch resistance data of the examples and comparative examples in Table 1, the modified polysiloxane masterbatch and erucamide added in this invention can effectively improve the scratch resistance of the coating, thus reflecting that the coating has better scratch resistance.
[0037] In the description of this specification, the references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
[0038] The above description is merely an example and illustration of the present invention. Those skilled in the art can make various modifications or additions to the specific embodiments described, or use similar methods to replace them, as long as they do not deviate from the invention or exceed the scope defined in the claims, all of which should fall within the protection scope of the present invention.
Claims
1. A method for preparing a scratch-resistant coating for pen-writing wallpaper, characterized in that, Includes the following steps: Clean the dust and oil stains from the surface of the pen-writing wallpaper. After plastering, puttingtying, and sanding, apply the paint to the surface of the pen-writing wallpaper using a roller coating machine and dry it to obtain a scratch-resistant coating for the pen-writing wallpaper. The raw materials for preparing the coating, by weight, include: The ingredients are: 75-85 parts self-made polyester resin, 2-3 parts modified polysiloxane masterbatch, 1-2.5 parts erucamide, 6-8 parts curing agent, 1-1.5 parts leveling agent, 0.2-0.4 parts antioxidant, and 1-1.2 parts benzoin.
2. The method for preparing the scratch-resistant coating for pen-writing wallpaper according to claim 1, characterized in that, The self-made polyester resin comprises the following parts by weight: 45-65 parts neopentyl glycol, 48-75 parts hexanediol, 70-85 parts terephthalic acid, 10-14 parts isophthalic acid, 4-9 parts modifier, 5-8 parts ε-polylysine, 5-9 parts acrylic resin, and 0.1-0.2 parts monobutyltin oxide.
3. The method for preparing the scratch-resistant coating for pen-writing wallpaper according to claim 2, characterized in that, The modified material is prepared by mixing dodecanoic acid, cyclohexane oxide and tetrabutyl titanate, purging with nitrogen, and stirring under controlled temperature to obtain the modified material.
4. The method for preparing the scratch-resistant coating for pen-writing wallpaper according to claim 3, characterized in that, The molar ratio of dodecanoic acid to cyclohexane oxide is 1:2-2.2; the amount of tetrabutyl titanate added is 4-5% of the total mass of dodecanoic acid and cyclohexane oxide.
5. The method for preparing the scratch-resistant coating for pen-writing wallpaper according to claim 2, characterized in that, The acrylic resin has an acid value of 33 mgKOH / g and a Tg of 45℃.
6. The method for preparing the scratch-resistant coating for pen-writing wallpaper according to claim 2, characterized in that, The method for preparing the self-made polyester resin is as follows: Under nitrogen atmosphere, neopentyl glycol and hexanediol are mixed and stirred at a controlled temperature. Then, terephthalic acid, modifier, acrylic resin, ε-polylysine and monobutyltin oxide are added sequentially and kept at a controlled temperature. The mixture is then cooled down until isophthalic acid is added and kept at a controlled temperature. The acid value is measured under vacuum, the vacuum is broken and the material is discharged to obtain the self-made polyester resin.
7. The method for preparing the scratch-resistant coating for pen-writing wallpaper according to claim 6, characterized in that, The temperature for temperature-controlled stirring is 155-165℃ for 30-60 minutes; the temperature for temperature control and heat preservation is 245-255℃ until the resin becomes transparent; the temperature for cooling is 225-235℃; the temperature for heat preservation with isophthalic acid is 1.5-2 hours; the temperature for vacuuming and acid measurement is 31-35 mgKOH / g after vacuuming.
8. The method for preparing the scratch-resistant coating for pen-writing wallpaper according to claim 1, characterized in that, The curing agent includes triglycidyl isocyanurate; the leveling agent includes at least one of leveling agent PV-88, leveling agent GLP-503 and leveling agent GLP505; the antioxidant includes at least one of antioxidant 168, antioxidant 1076 and antioxidant 1010.
9. The method for preparing the scratch-resistant coating for pen-writing wallpaper according to claim 1, characterized in that, The preparation method of the coating includes: The raw materials are premixed and then melt-extruded using a twin-screw extruder. After being pressed, crushed, and sieved, the coating is obtained. The twin-screw extruder has a main screw speed of 180-200 r / min, a screw section temperature range of 170-185℃, and a die head temperature of 190-200℃; the sieving is a 150-160 mesh sieve.
10. A scratch-resistant coating for room temperature pen-writing wallpaper prepared by the preparation method according to any one of claims 1-9.