Raw lacquer coating as well as preparation method and application thereof

Abstract

The invention belongs to the technical field of high polymer materials, and provides a raw lacquer coating and a preparation method and application thereof, the raw lacquer coating comprises the following components by mass: 200-400 parts of raw lacquer, 300-400 parts of a composite paint vehicle, 100-200 parts of concentrated soybean milk, 80-120 parts of a pigment, 200-300 parts of an accelerator, 1-10 parts of dimethyl silicone, and 550-600 parts of a solvent. The natural raw lacquer is taken as a modulation object, and the raw material is from plants, is green and environment-friendly and can be recycled and regenerated; other raw materials are also green and environment-friendly, and the concentrated soybean milk contains protein and lecithin, so that film formation and oxidative polymerization of the raw lacquer can be promoted when the concentrated soybean milk is added into the coating, and the curing speed is increased; the composite paint vehicle is prepared from the raw lacquer and the vegetable oil, the performance of a paint film is improved, and the vegetable oil plays a moisturizing role. The performance of the coating prepared from the natural raw lacquer is superior to that of similar coatings, and degradation and migration of harmful substances in plastic are avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of polymer materials, and particularly relates to a raw lacquer coating, a preparation method thereof, and an application thereof. Background Art

[0002] Plastic products are a common material with a very wide range of applications. Due to anti-aging, corrosion resistance, and poor heat resistance, they often have drawbacks such as powdering, deformation, and migration of additives, which affect their use. In order to overcome these drawbacks, coatings are often applied on the surface for protection. However, the adhesion and corrosion resistance of these coatings are poor, and these problems have not been well solved. Therefore, providing a coating that can comprehensively protect plastic products has become a hot issue in current research. Summary of the Invention

[0003] The purpose of the present invention is to overcome the defects in the prior art and provide a raw lacquer coating, a preparation method thereof, and an application thereof.

[0004] In order to achieve the above-mentioned invention purpose, the present invention provides the following technical solutions:

[0005] The present invention provides a raw lacquer coating, comprising the following components in parts by mass:

[0006] 200 - 400 parts of raw lacquer, 300 - 400 parts of composite paint, 100 - 200 parts of concentrated soybean milk, 80 - 120 parts of pigment, 200 - 300 parts of accelerator, 1 - 10 parts of dimethyl silicone, and 550 - 600 parts of solvent.

[0007] Preferably, the preparation method of the composite paint comprises the following steps:

[0008] (1) Stir the raw lacquer to obtain polymerized raw lacquer;

[0009] (2) Mix the polymerized raw lacquer and polymerized vegetable oil and then knead them to obtain the composite paint.

[0010] Preferably, the rotation speed of the stirring in step (1) is 450 - 500 rpm.

[0011] Preferably, the water content of the polymerized raw lacquer in step (1) is 3 - 5%, and the viscosity ≥ 450000 mPa·s.

[0012] Preferably, the polymerized vegetable oil in step (2) is rapeseed oil and / or tea oil; the viscosity of the polymerized vegetable oil is 3000000 - 3500000 mPa·s; the mass of the polymerized vegetable oil is 2 - 4% of the mass of the polymerized raw lacquer;

[0013] The kneading time in step (2) is 1.5 - 2 h.

[0014] Preferably, the method for preparing the concentrated soybean milk comprises the following steps:

[0015] Heat and concentrate the soybean milk to obtain the concentrated soybean milk;

[0016] The heating temperature is 80-120 °C;

[0017] The mass of the concentrated soybean milk is 50-70% of the mass of the soybean milk.

[0018] Preferably, the pigment comprises iron oxide red, titanium dioxide, lithopone, carbon black, phthalocyanine blue or azo red;

[0019] The promoter comprises one or more of vinyl silane, amino silane, epoxy silane and methacryloxy silane;

[0020] The solvent comprises turpentine and / or butanol.

[0021] The present invention also provides a method for preparing the raw lacquer coating, comprising the following steps:

[0022] Mix raw lacquer, composite paint, concentrated soybean milk, pigment, promoter, dimethyl silicone and solvent to obtain the raw lacquer coating.

[0023] Preferably, the mixing speed is 650-700 rpm and the time is 30-60 min.

[0024] The present invention also provides the application of the raw lacquer coating in plastic products.

[0025] The present invention provides a raw lacquer coating, comprising the following components in parts by mass: 200-400 parts of raw lacquer, 300-400 parts of composite paint, 100-200 parts of concentrated soybean milk, 80-120 parts of pigment, 200-300 parts of promoter, 1-10 parts of dimethyl silicone, and 550-600 parts of solvent. The present invention takes natural raw lacquer as the modulation object, and this raw material comes from plants, is green and environmentally friendly, and can be recycled; other raw materials in the present invention are also green and environmentally friendly. The concentrated soybean milk contains protein and lecithin, and adding it to the coating can promote the film formation of raw lacquer, oxidation polymerization, and accelerate the curing speed; the composite paint in the present invention is prepared from raw lacquer and vegetable oil, which improves the performance of the paint film, and the vegetable oil plays a moisturizing role. The coating prepared by the present invention using natural raw lacquer has better performance than similar coatings, and avoids the degradation and migration of harmful substances in plastics.

[0026] The present invention also provides a method for preparing the raw lacquer coating. Mix raw lacquer, composite paint, concentrated soybean milk, pigment, promoter, dimethyl silicone and solvent to obtain the raw lacquer coating; this method is simple and efficient, without complex process requirements, and is suitable for large-scale preparation. Detailed embodiments

[0027] The present invention provides a raw lacquer coating, comprising the following components in parts by mass:

[0028] 200 - 400 parts of raw lacquer, 300 - 400 parts of composite paint, 100 - 200 parts of concentrated soybean milk, 80 - 120 parts of pigment, 200 - 300 parts of accelerator, 1 - 10 parts of dimethyl silicone, and 550 - 600 parts of solvent.

[0029] In the present invention, the parts by mass of the raw lacquer are preferably 240 - 360 parts, more preferably 260 - 340 parts, and still more preferably 280 - 320 parts.

[0030] In the present invention, the parts by mass of the composite paint are preferably 310 - 390 parts, more preferably 320 - 380 parts, and still more preferably 340 - 360 parts.

[0031] In the present invention, the parts by mass of the concentrated soybean milk are preferably 120 - 180 parts, more preferably 130 - 170 parts, and still more preferably 140 - 160 parts.

[0032] In the present invention, the parts by mass of the pigment are preferably 85 - 115 parts, more preferably 90 - 110 parts, and still more preferably 95 - 105 parts.

[0033] In the present invention, the parts by mass of the accelerator are preferably 220 - 280 parts, more preferably 230 - 270 parts, and still more preferably 240 - 260 parts.

[0034] In the present invention, the parts by mass of the dimethyl silicone are preferably 2 - 9 parts, more preferably 3 - 8 parts, and still more preferably 4 - 7 parts.

[0035] In the present invention, the parts by mass of the solvent are preferably 555 - 595 parts, more preferably 560 - 590 parts, and still more preferably 570 - 580 parts.

[0036] In the present invention, the raw lacquer is obtained by wounding the phloem of the lacquer tree (Rhus verniciflua Stokes). It includes the lacquer tree sap obtained by wounding the phloem of lacquer trees such as Chinese lacquer tree (Toxicodendron uerniciflua) and Vietnamese lacquer tree (Toxicodendron succedance).

[0037] In the present invention, the preparation method of the composite paint comprises the following steps:

[0038] (1) Stir the raw lacquer to obtain polymerized raw lacquer;

[0039] (2) Knead after mixing the polymerized raw lacquer and the polymerized vegetable oil to obtain the composite paint.

[0040] In the present invention, the rotation speed of the stirring in step (1) is preferably 450 - 500 rpm, more preferably 460 - 490 rpm, and still more preferably 470 - 480 rpm.

[0041] In the present invention, the moisture content of the polymerized raw lacquer in step (1) is preferably 3 - 5%, more preferably 3.5 - 4.5%, and still more preferably 3.8 - 4.2%; the viscosity is preferably ≥450000 mpa·s, more preferably ≥460000 mpa·s, and still more preferably ≥470000 mpa·s.

[0042] In the present invention, the polymerized vegetable oil in step (2) is rapeseed oil and / or tea oil; the viscosity of the polymerized vegetable oil is preferably 3000000 - 3500000 mpa·s, more preferably 3100000 - 3400000 mpa·s, and still more preferably 3200000 - 3300000 mpa·s; the mass of the polymerized vegetable oil is preferably 2 - 4% of the mass of the polymerized raw lacquer, more preferably 2.5 - 3.5%, and still more preferably 2.8 - 3.2%.

[0043] In the present invention, the kneading time in step (2) is preferably 1.5 - 2 h, more preferably 1.6 - 1.9 h, and still more preferably 1.7 - 1.8 h.

[0044] In the present invention, the preparation method of the concentrated soybean milk comprises the following steps:

[0045] Heat and concentrate the soybean milk to obtain the concentrated soybean milk.

[0046] In the present invention, the soybean milk is obtained by grinding soybeans and water, and the mass ratio of soybeans to water is preferably 1:8 - 10, more preferably 1:8.5 - 9.5, and still more preferably 1:8.8 - 9.2.

[0047] In the present invention, the heating temperature is preferably 80 - 120 °C, more preferably 85 - 115 °C, and still more preferably 90 - 110 °C.

[0048] In the present invention, the mass of the concentrated soybean milk is preferably 50 - 70% of the mass of the soybean milk, more preferably 55 - 65%, and still more preferably 58 - 62%.

[0049] In the present invention, the pigment includes iron red, titanium dioxide, lithopone, carbon black, phthalocyanine blue or azo red.

[0050] In the present invention, the promoter comprises one or more of vinyl silane, amino silane, epoxy silane, and methacryloxy silane.

[0051] In the present invention, the solvent comprises turpentine and / or butanol. When both turpentine and butanol are present, their masses are equal.

[0052] The present invention also provides a method for preparing the raw lacquer coating, comprising the following steps:

[0053] Mix raw lacquer, composite paint, concentrated soybean milk, pigment, promoter, dimethyl silicone, and solvent to obtain the raw lacquer coating.

[0054] In the present invention, the rotation speed of the mixing is preferably 650 - 700 rpm, more preferably 660 - 690 rpm, and even more preferably 670 - 680 rpm; the time is preferably 30 - 60 min, more preferably 35 - 55 min, and even more preferably 40 - 50 min.

[0055] The present invention also provides the application of the raw lacquer coating in plastic products.

[0056] The technical solutions provided by the present invention will be described in detail below in conjunction with the embodiments, but they should not be construed as limiting the protection scope of the present invention.

[0057] Example 1

[0058] In this example, the natural raw lacquer is from the Mao Ba Yang Gang big lacquer tree in Toxicodendron vernicifluum. The raw lacquer of the Yang Gang big lacquer tree is obtained by wounding the phloem of the tree, and is abbreviated as Yang Gang big lacquer.

[0059] The preparation method of the composite paint is as follows: Stir the Yang Gang big lacquer at a rotation speed of 480 rpm until the water content is 4% and the viscosity is 450000 mPa·s to obtain polymerized raw lacquer; mix the polymerized raw lacquer and camellia oil (viscosity is 3400000 mPa·s, and the mass of camellia oil is 3% of the mass of the polymerized raw lacquer), and knead for 1.5 h to obtain the composite paint.

[0060] Grind soybeans and water into soybean milk according to a mass ratio of 1:9, and heat and concentrate the soybean milk to 60% of the original mass at 100 °C to obtain concentrated soybean milk.

[0061] Weigh the following raw materials in parts by mass:

[0062] 300 parts of Yang Gang big lacquer, 340 parts of composite paint, 150 parts of concentrated soybean milk, 100 parts of pigment, 267 parts of promoter, 6 parts of dimethyl silicone, and 570 parts of solvent.

[0063] The pigment is iron red, the promoter is vinyl silane, and the solvent is turpentine.

[0064] After mixing the raw materials evenly, stir at a speed of 680 rpm for 40 min to obtain the raw lacquer coating.

[0065] Example 2

[0066] In this example, the natural raw lacquer is from the Shaanxi Dahongpao lacquer tree among the Chinese lacquer trees (Toxicodendron verniciflua), and the raw lacquer of the Shaanxi Dahongpao lacquer tree is obtained by wounding the phloem, which is abbreviated as Shaanxi lacquer.

[0067] The preparation method of the composite paint is as follows: Stir the Shaanxi lacquer at a speed of 500 rpm until the water content is 3% and the viscosity is 450,000 mPa·s to obtain the polymerized raw lacquer; mix the polymerized raw lacquer and rapeseed oil (viscosity is 3,300,000 mPa·s, and the mass of rapeseed oil is 2% of the mass of the polymerized raw lacquer), and knead for 2 h to obtain the composite paint.

[0068] Grind soybeans and water into soy milk according to a mass ratio of 1:8, and heat and concentrate the soy milk to 50% of the original mass at 80 °C to obtain concentrated soy milk.

[0069] Weigh the following raw materials in parts by mass:

[0070] 230 parts of Shaanxi lacquer, 320 parts of composite paint, 120 parts of concentrated soy milk, 110 parts of pigment, 234 parts of promoter, 5 parts of dimethyl silicone, and 590 parts of solvent.

[0071] The pigment is titanium dioxide, the promoter is amino silane, and the solvent is butanol.

[0072] After mixing the raw materials evenly, stir at a speed of 700 rpm for 50 min to obtain the raw lacquer coating.

[0073] Example 3

[0074] In this example, the natural raw lacquer is from the Maoba Yanggang big lacquer tree, Shaanxi Dahongpao lacquer tree, and Vietnamese lacquer tree (Toxicodendron succedance) among the Chinese lacquer trees (Toxicodendron verniciflua). The raw lacquers obtained by wounding the phloem of the three are mixed in equal mass, which is abbreviated as mixed raw lacquer.

[0075] The preparation method of the composite paint is as follows: Stir the mixed raw lacquer at a speed of 450 rpm until the water content is 5% and the viscosity is 450,000 mPa·s to obtain polymerized raw lacquer; Mix the polymerized raw lacquer and rapeseed oil (viscosity is 3200000 mPa·s, and the mass of rapeseed oil is 4% of the mass of the polymerized raw lacquer), and knead for 1.8 h to obtain the composite paint.

[0076] Grind soybeans and water into soymilk according to a mass ratio of 1:9.5, and heat and concentrate the soymilk to 70% of its original mass at 90 °C to obtain concentrated soymilk.

[0077] Weigh the following raw materials in parts by mass:

[0078] 385 parts of mixed raw lacquer, 366 parts of composite paint, 180 parts of concentrated soymilk, 85 parts of pigment, 280 parts of accelerator, 8 parts of dimethyl silicone, and 570 parts of solvent.

[0079] The pigment is phthalocyanine blue, the accelerator is epoxy group silane, and the solvent is a mixture of turpentine and butanol with a mass ratio of 1:1.

[0080] After mixing the raw materials evenly, stir at a speed of 680 rpm for 40 min to obtain the raw lacquer coating.

[0081] Test the raw lacquer coatings prepared in Examples 1 to 3, and the results are shown in Table 1.

[0082] Table 1 Properties of Raw Lacquer Coatings

[0083]

[0084] Apply the coatings prepared in Examples 1 to 3 on the surface of plastic products. The wet film thickness is 25 - 35 microns, and test after standing for 7 days. The results are recorded in Table 2.

[0085] Table 2 Coating Properties

[0086]

[0087]

[0088] As can be seen from the above examples, the present invention provides a raw lacquer coating for plastic products. The present invention takes natural raw lacquer as the modulation object. This raw material comes from plants, is green and environmentally friendly, and can be recycled; The coating prepared by the present invention using natural raw lacquer has better performance than similar coatings, avoiding the degradation and migration of harmful substances in plastics. According to the results of the examples, the coating provided by the present invention meets all the detection conditions and is a coating with excellent performance.

[0089] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A raw lacquer coating, characterized in that, Comprising the following components in parts by mass: 200 - 400 parts of raw lacquer, 300 - 400 parts of composite paint, 100 - 200 parts of concentrated soybean milk, 80 - 120 parts of pigment, 200 - 300 parts of accelerator, 1 - 10 parts of dimethyl silicone, 550 - 600 parts of solvent.

2. The raw lacquer coating according to claim 1, characterized in that, The preparation method of the composite paint comprises the following steps: (1) Stir the raw lacquer to obtain polymerized raw lacquer; (2) Mix the polymerized raw lacquer and polymerized vegetable oil and then knead them to obtain the composite paint.

3. The raw lacquer coating according to claim 2, wherein The rotation speed of the stirring in step (1) is 450 - 500 rpm.

4. The raw lacquer coating according to claim 2 or 3, characterized in that, The water content of the polymerized raw lacquer in step (1) is 3 - 5%, and the viscosity ≥ 450000 mPa·s.

5. The raw lacquer coating according to claim 4, characterized in that, The polymerized vegetable oil in step (2) is rapeseed oil and / or camellia oil; the viscosity of the polymerized vegetable oil is 3000000 - 3500000 mPa·s; the mass of the polymerized vegetable oil is 2 - 4% of the mass of the polymerized raw lacquer; The kneading time in step (2) is 1.5 - 2 h.

6. The raw lacquer coating according to claim 1, 2, 3 or 5, characterized in that, The preparation method of the concentrated soybean milk comprises the following steps: Heat and concentrate the soybean milk to obtain concentrated soybean milk; The heating temperature is 80 - 120 °C; The mass of the concentrated soybean milk is 50 - 70% of the mass of the soybean milk.

7. The raw lacquer coating according to claim 6, characterized in that, The pigment comprises iron red, titanium dioxide, lithopone, carbon black, phthalocyanine blue or azo red; The accelerator comprises one or more of vinyl silane, amino silane, epoxy silane and methacryloxy silane; The solvent comprises turpentine and / or butanol.

8. The preparation method of the raw lacquer coating according to any one of claims 1 to 7, characterized in that, Comprising the following steps: Mix the raw lacquer, composite paint, concentrated soybean milk, pigment, accelerator, dimethyl silicone and solvent to obtain the raw lacquer paint.

9. The preparation method of the raw lacquer coating according to claim 8, wherein, The rotation speed of the mixing is 650 - 700 rpm, and the time is 30 - 60 min.

10. Application of the raw lacquer paint according to any one of claims 1 - 7 in plastic products.

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