Non-stick pan coating, method for its production and pan

Abstract

The present application relates to the technical field of non-stick pot coating, and proposes a non-stick pot coating, a preparation method thereof and a pot. The non-stick pot coating comprises the following components in parts by weight: 45-50 parts of silicon carbide, 20-30 parts of silicon nitride, 100-120 parts of aluminum nitride, 20-40 parts of modified alumina, 140-160 parts of saturated polyester resin, 100-120 parts of silicone resin, 1-2 parts of lubricating grease, and the modifier of the modified alumina is a compound containing amino and carboxyl groups. Through the above technical solution, the problem of poor wear resistance and adhesion of the non-stick pot coating in the related art is solved.

Description

Technical Field

[0001] This invention relates to the field of non-stick pan coating technology, specifically to a non-stick pan coating, its preparation method, and cookware. Background Technology

[0002] Non-stick pans are widely used cookware in modern society. Because food doesn't stick to the bottom during cooking, they not only provide a pleasant cooking experience but also make cleaning easier. Therefore, non-stick pans have become an essential tool in both home cooking and professional kitchens. The non-stick property of non-stick pans is primarily due to the non-stick coating. However, currently available non-stick coatings generally have poor abrasion resistance and adhesion, which significantly shortens the lifespan of non-stick pans. Therefore, researching a non-stick coating with good abrasion resistance and adhesion is crucial for those skilled in the art. Summary of the Invention

[0003] This invention proposes a non-stick pan coating, its preparation method, and the cookware thereof, which solves the problems of poor wear resistance and adhesion of non-stick pan coatings in related technologies.

[0004] The technical solution of the present invention is as follows: This invention proposes a non-stick pan coating comprising the following components in parts by weight: 45-50 parts silicon carbide, 20-30 parts silicon nitride, 100-120 parts aluminum nitride, 20-40 parts modified alumina, 140-160 parts saturated polyester resin, 100-120 parts organosilicon resin, and 1-2 parts lubricating grease. The modifier for the modified alumina is a compound containing amino and carboxyl groups.

[0005] As a further technical solution, the compound containing amino and carboxyl groups includes 2-amino-4,5-dicarboxyimidazole and / or N-(5-amino-1-carboxypentyl)iminodiacetic acid.

[0006] As a further technical solution, the compound containing amino and carboxyl groups includes 2-amino-4,5-dicarboxyimidazole and N-(5-amino-1-carboxypentyl)iminodiacetic acid in a mass ratio of 1:9 to 9:1.

[0007] This invention further enhances the wear resistance and adhesion of non-stick cookware coatings by using a compound of 2-amino-4,5-dicarboxyimidazole and N-(5-amino-1-carboxypentyl)iminodiacetic acid in a mass ratio of 1:9 to 9:1.

[0008] As a further technical solution, the mass ratio of 2-amino-4,5-dicarboxyimidazole and N-(5-amino-1-carboxypentyl)iminodiacetic acid is 1:3 to 3:1.

[0009] This invention further enhances the wear resistance and adhesion of the non-stick pan coating by limiting the mass ratio of 2-amino-4,5-dicarboxyimidazole and N-(5-amino-1-carboxypentyl)iminodiacetic acid to 1:3 to 3:1.

[0010] As a further technical solution, the raw materials for the modifier-modified alumina include alumina and modifier in a mass ratio of 20:1~5.

[0011] As a further technical solution, the raw materials for the modifier-modified alumina include alumina and modifier in a mass ratio of 20:3~4.

[0012] This invention further enhances the wear resistance and adhesion of non-stick pan coatings by limiting the raw materials of the modified alumina to include alumina and a modifier in a mass ratio of 20:3~4.

[0013] As a further technical solution, the particle size of the alumina is 5 μm.

[0014] As a further technical solution, the preparation method of the modified alumina includes the following steps: The modifier was dissolved in tetrahydrofuran, alumina was added and mixed evenly, filtered, and dried to obtain modifier-modified alumina.

[0015] This invention proposes a method for preparing a non-stick pan coating, comprising the following steps: Saturated polyester resin, silicone resin, and lubricating grease are mixed evenly, and silicon carbide, modified alumina, aluminum nitride, and silicon nitride are added and dispersed evenly to obtain a non-stick pan coating.

[0016] This invention provides a cookware comprising the aforementioned non-stick coating or a non-stick coating prepared by the aforementioned method. The non-stick coating prepared by this invention can be used in various cast iron cookware, such as cast iron frying pans, cast iron steak pans, and cast iron stew pots, exhibiting excellent non-stick properties, wear resistance, and adhesion.

[0017] The working principle and beneficial effects of this invention are as follows: In this invention, compounds containing amino and carboxyl groups are selected as modifiers to modify alumina, thereby enhancing the bonding between alumina and resin and cookware. By combining it with components such as silicon carbide, silicon nitride, aluminum nitride, saturated polyester resin, organosilicon resin, and lubricating grease, and by adjusting and optimizing the content of each component, the adhesion between the non-stick coating and the iron pot and the dispersibility of alumina in the coating material are enhanced, thus solving the problems of poor wear resistance and adhesion of the non-stick coating. Detailed Implementation

[0018] 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.

[0019] In the following examples and comparative examples, the parameters of the raw materials are as follows: The saturated polyester resin is Toyobo saturated polyester resin GK-250; The silicone resin is Dow Corning silicone resin RSN-0805; Silicon carbide: particle size 1μm; Alumina: Particle size 5μm; Aluminum nitride: particle size 3μm; Silicon nitride: Particle size 500nm; All lubricating greases are hydrogenated castor oil.

[0020] Example 1 A non-stick coating for cookware, the preparation method of which includes the following steps: S1. Dissolve 1 part of 2-amino-4,5-dicarboxyimidazole in 50 parts of tetrahydrofuran, add 20 parts of alumina, sonicate for 20 min, filter, and dry to obtain modified alumina. S2. Mix 140 parts of saturated polyester resin, 100 parts of organosilicon resin, and 1 part of lubricating grease for 30 minutes until uniform. Then add 45 parts of silicon carbide, 20 parts of modified alumina, 100 parts of aluminum nitride, and 20 parts of silicon nitride. Homogenize for 3 hours to obtain a non-stick pan coating.

[0021] Example 2 A non-stick coating for cookware, the preparation method of which includes the following steps: S1. Dissolve 10 parts of N-(5-amino-1-carboxypentyl)iminodiacetic acid in 100 parts of tetrahydrofuran, add 40 parts of alumina, sonicate for 20 min, filter, and dry to obtain modified alumina. S2. Mix 160 parts of saturated polyester resin, 120 parts of silicone resin, and 2 parts of lubricating grease for 30 minutes until uniform. Then add 50 parts of silicon carbide, 40 parts of modified alumina, 120 parts of aluminum nitride, and 30 parts of silicon nitride. Homogenize for 4 hours to obtain a non-stick coating.

[0022] Example 3 The only difference from Example 1 is that 2-amino-4,5-dicarboxyimidazole is replaced with an equal amount of N-(5-amino-1-carboxypentyl)iminodiacetic acid.

[0023] Example 4 A non-stick coating for cookware, the preparation method of which includes the following steps: S1. Dissolve 0.1 parts of 2-amino-4,5-dicarboxyimidazole and 0.9 parts of N-(5-amino-1-carboxypentyl)iminodiacetic acid in 50 parts of tetrahydrofuran, add 20 parts of alumina, sonicate for 20 min, filter, and dry to obtain modified alumina. S2. Mix 140 parts of saturated polyester resin, 100 parts of organosilicon resin, and 1 part of lubricating grease for 30 minutes until uniform. Then add 45 parts of silicon carbide, 20 parts of modified alumina, 100 parts of aluminum nitride, and 20 parts of silicon nitride. Homogenize for 3 hours to obtain a non-stick pan coating.

[0024] Example 5 The only difference from Example 4 is that 0.9 parts of 2-amino-4,5-dicarboxyimidazole and 0.1 parts of N-(5-amino-1-carboxypentyl)iminodiacetic acid are used.

[0025] Example 6 The only difference from Example 4 is that 0.25 parts of 2-amino-4,5-dicarboxyimidazole and 0.75 parts of N-(5-amino-1-carboxypentyl)iminodiacetic acid are used.

[0026] Example 7 The only difference from Example 4 is that 0.75 parts of 2-amino-4,5-dicarboxyimidazole and 0.25 parts of N-(5-amino-1-carboxypentyl)iminodiacetic acid are used.

[0027] Example 8 The only difference from Example 4 is that 3.75 parts of 2-amino-4,5-dicarboxyimidazole and 1.25 parts of N-(5-amino-1-carboxypentyl)iminodiacetic acid are used.

[0028] Example 9 The only difference from Example 4 is that 2.25 parts of 2-amino-4,5-dicarboxyimidazole and 0.75 parts of N-(5-amino-1-carboxypentyl)iminodiacetic acid are used.

[0029] Example 10 The only difference from Example 4 is that: 3 parts of 2-amino-4,5-dicarboxyimidazole and 1 part of N-(5-amino-1-carboxypentyl)iminodiacetic acid.

[0030] Comparative Example 1 A non-stick coating for cookware, the preparation method of which includes the following steps: Mix 140 parts of saturated polyester resin, 100 parts of silicone resin, and 1 part of lubricating grease for 30 minutes until uniform. Then add 45 parts of silicon carbide, 20 parts of alumina, 100 parts of aluminum nitride, and 20 parts of silicon nitride. Homogenize for 3 hours to obtain a non-stick pan coating.

[0031] Test case The non-stick pan coatings prepared in Examples 1-10 and Comparative Example 1 were tested for wear by grinding with a grinding wheel for 200 revolutions under a 250g weight, using tinplate as the substrate and tinplate as the substrate, according to the method in GB / T1768-2006. The wear amount of the non-stick pan coating was tested. The non-stick pan coatings prepared in Examples 1-10 and Comparative Example 1 were sprayed onto the surface of the non-stick pan substrate and baked to obtain a coating with a dry film thickness of 25μm. The adhesion was tested according to the method in GB / T 4893.4-2013, and the results are shown in Table 1.

[0032] Table 1. Test results of wear and adhesion of the non-stick pan coatings prepared in Examples 1-10 and Comparative Example 1.

[0033] Compared with Comparative Example 1, the alumina in the non-stick pan coatings prepared in Examples 1, 3-10 is modified alumina. As a result, the wear amount in Examples 1, 3-10 is less than that in Comparative Example 1, and the adhesion is better than that in Comparative Example 1, indicating that the use of a modifier to modify alumina enhances the wear resistance and adhesion of the non-stick pan coating.

[0034] Compared with Examples 1 and 3, the modifier in the alumina of the non-stick pan coatings prepared in Examples 4 to 7 is a combination of 2-amino-4,5-dicarboxyimidazole and N-(5-amino-1-carboxypentyl)iminodiacetic acid in a mass ratio of 1:9 to 9:1. As a result, the wear amount of Examples 4 to 7 was less than that of Examples 1 and 3, and the adhesion was better than that of Examples 1 and 3. This indicates that the combination of 2-amino-4,5-dicarboxyimidazole and N-(5-amino-1-carboxypentyl)iminodiacetic acid in a mass ratio of 1:9 to 9:1 further enhances the wear resistance and adhesion of the non-stick pan coating.

[0035] Compared with Examples 4-5, the modifiers in the alumina modified by the modifiers in the non-stick pan coatings prepared in Examples 6-7 were 2-amino-4,5-dicarboxyimidazole and N-(5-amino-1-carboxypentyl)iminodiacetic acid in a mass ratio of 1:3 to 3:1. As a result, the wear amount in Examples 6-7 was less than that in Examples 4-5, indicating that the mass ratio of 2-amino-4,5-dicarboxyimidazole and N-(5-amino-1-carboxypentyl)iminodiacetic acid of 1:3 to 3:1 further enhanced the wear resistance of the non-stick pan coating.

[0036] Compared with Examples 7-8, the non-stick pan coatings prepared in Examples 9-10 contain alumina and modifier in a mass ratio of 20:3-4. As a result, the wear amount of Examples 9-10 is less than that of Examples 7-8, and the adhesion is better than that of Examples 7-8. This indicates that the alumina modified by the modifier, which contains alumina and modifier in a mass ratio of 20:3-4, further enhances the wear resistance and adhesion of the non-stick pan coating.

[0037] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A non-stick pan coating, characterized in that, The product comprises the following components in parts by weight: 45-50 parts silicon carbide, 20-30 parts silicon nitride, 100-120 parts aluminum nitride, 20-40 parts modified alumina, 140-160 parts saturated polyester resin, 100-120 parts organosilicon resin, and 1-2 parts lubricating grease. The modifier of the modified alumina is a compound containing amino and carboxyl groups. The compound containing amino and carboxyl groups includes 2-amino-4,5-dicarboxyimidazole and N-(5-amino-1-carboxypentyl)iminodiacetic acid in a mass ratio of 1:9 to 9:

1.

2. The non-stick pan coating according to claim 1, characterized in that, The mass ratio of 2-amino-4,5-dicarboxyimidazole to N-(5-amino-1-carboxypentyl)iminodiacetic acid is 1:3 to 3:

1.

3. The non-stick pan coating according to claim 1, characterized in that, The raw materials for the modified alumina include alumina and a modifier in a mass ratio of 20:1 to 5.

4. The non-stick pan coating according to claim 3, characterized in that, The raw materials for the modified alumina include alumina and a modifier in a mass ratio of 20:3~4.

5. The non-stick pan coating according to claim 3, characterized in that, The alumina has a particle size of 5 μm.

6. A non-stick pan coating according to any one of claims 1 to 5, characterized in that, The method for preparing the modified alumina includes the following steps: The modifier was dissolved in tetrahydrofuran, alumina was added and mixed evenly, filtered, and dried to obtain modifier-modified alumina.

7. A method for preparing a non-stick pan coating according to any one of claims 1 to 6, characterized in that, Includes the following steps: Saturated polyester resin, silicone resin, and lubricating grease are mixed evenly, and silicon carbide, modified alumina, aluminum nitride, and silicon nitride are added and dispersed evenly to obtain a non-stick pan coating.

8. A cookware, characterized in that, The non-stick coating includes the non-stick coating described in any one of claims 1 to 6 or the non-stick coating prepared by the preparation method described in claim 7.

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