A full-matt, non-frosting finish for wood at low temperature and a preparation method thereof

Abstract

The present application relates to the technical field of paint, especially to a full-matt anti-blooming finish paint for wood at low temperature and a preparation method thereof.The present application provides a full-matt anti-blooming finish paint for wood at low temperature, which solves the blooming phenomenon of the existing finish paint during the construction process at low temperature in winter, and can realize the construction of the non-blooming paint film at-10 DEG C, and has the characteristics of good flatness, good leveling property, high hardness and excellent fullness at low temperature.The full-matt anti-blooming finish paint does not need to adjust the spraying equipment, does not need to change the original construction method, can improve the delivery efficiency of furniture factory, and has wide application prospect.

Description

Technical Field

[0001] This invention relates to the field of coating technology, and in particular to a fully matte anti-blooming topcoat for use on wood at low temperatures and its preparation method. Background Technology

[0002] In recent years, with increased awareness of environmental protection, some practices in northern regions have changed. In winter, due to the limitations of burning wood for heating, some small and medium-sized furniture factories may face construction challenges. In this situation, these factories need to find alternative construction methods to adapt to current environmental requirements. Therefore, how to design a fully matte, anti-blooming topcoat for woodwork used at low temperatures to improve the product's low-temperature adaptability and thus enhance its competitiveness in the entire furniture coating industry has become a pressing technical problem to be solved in this field. Summary of the Invention

[0003] This invention, through extensive optimization and adjustment of the formula, proposes a fully matte anti-blooming topcoat for use at low temperatures, solving the problem of blooming paint film that occurs during application of existing topcoats in low-temperature winter conditions. The fully matte anti-blooming topcoat of this invention comprises component A, component B, and component C, wherein component A comprises the following components by weight:

[0004] 72-82 parts of soybean oil fatty acid modified alkyd resin

[0005] 1-3 parts of polyacetylacetonate antisettling agent

[0006] Defoamer 0.1~0.5 parts

[0007] 0.1~0.5 parts of wetting and dispersing agent

[0008] Leveling agent 0.1~0.5 parts

[0009] 5-9 parts matting agent

[0010] 5-10 parts of butyl acetate

[0011] 1-3 parts of propylene glycol methyl ether acetate;

[0012] The leveling agent is at least one of fluorocarbon modified polyacrylate leveling agent and polyether modified polydimethylsiloxane copolymer leveling agent.

[0013] Component B comprises the following components in parts by weight:

[0014] Trimer 35-40 parts

[0015] 40-50 parts of adduct

[0016] 10-25 parts of butyl acetate;

[0017] Component C comprises the following components in parts by weight:

[0018] 30-55 parts of butyl acetate

[0019] 15-20 parts of ethyl acetate or dimethyl carbonate

[0020] 5-25 parts of propylene glycol methyl ether acetate

[0021] 15-25 parts xylene.

[0022] This invention eliminates the factors causing paint film blooming caused by incompatible factors by using soybean oil fatty acid modified alkyd resin in combination with specific types of dispersants, leveling agents and anti-settling agents. It also eliminates the factors causing paint film blooming under low temperature conditions, so that the topcoat does not exhibit paint film blooming when used under low temperature conditions, thus improving the low temperature adaptability of the topcoat.

[0023] The specific resin, dispersant, and leveling agent system of this invention can promote the formation of a loose three-dimensional network structure of polyacetyl wax anti-settling agent in the system, which has good thixotropy and can make the whole system a stable homogeneous body that is not easy to settle. At the same time, during the drying process of the paint film, it can make the matting agent have a good arrangement effect and prevent the paint film from blooming.

[0024] Preferably, the weight ratio of component A, component B and component C is 1:(0.4~0.6):(0.4~0.6).

[0025] Preferably, the matting agent is a composite spherical matting agent.

[0026] The composite spherical matting agent has a small particle size, uniform particle size distribution, high porosity, low oil absorption, high matting efficiency, good coating transparency, and is easily dispersed and encapsulated by the soybean oil fatty acid modified alkyd resin used in this invention, resulting in a delicate feel.

[0027] Preferably, the trimer is a polyisocyanate trimer, and more preferably a toluene diisocyanate trimer.

[0028] Furthermore, this invention has found that by using the above-mentioned composite spherical matting agent and toluene diisocyanate trimer, the transparency and fullness of the topcoat of this invention can be significantly improved, thereby increasing construction efficiency and reducing construction costs.

[0029] Preferably, the defoamer is a mineral oil-based defoamer that does not contain silicone.

[0030] Preferably, the defoamer is a mixture of a defoaming polymer and a polysiloxane.

[0031] Preferably, the wetting and dispersing agent is a low molecular weight unsaturated polycarboxylic acid polymer solution.

[0032] In the system of the present invention, the wetting and dispersing agent can uniformly disperse the matting agent in the coating system, achieve stable dispersion of the matting agent particles, and be completely encapsulated by the system, thereby preventing the matting agent from being exposed on the paint film surface, which is more conducive to the stability of gloss and the smoothness of the paint film.

[0033] Preferably, the adduct is a toluene diisocyanate adduct.

[0034] Preferably, component A comprises the following components in parts by weight:

[0035] 78-80 parts of soybean oil fatty acid modified alkyd resin

[0036] 1-2 parts of polyacetylacetonate antisettling agent

[0037] 0.3-0.5 parts of defoamer

[0038] 0.4-0.5 parts of wetting and dispersing agent

[0039] Leveling agent 0.1~0.3 parts

[0040] 7-9 parts matting agent

[0041] 7-9 parts of butyl acetate

[0042] 2-3 parts of propylene glycol methyl ether acetate;

[0043] Component B comprises the following components in parts by weight:

[0044] Trimer 35-40 parts

[0045] 40-45 parts of adduct

[0046] 20-25 parts of butyl acetate;

[0047] Component C comprises the following components in parts by weight:

[0048] 30-40 parts of butyl acetate

[0049] 15-20 parts of ethyl acetate or dimethyl carbonate

[0050] 5-25 parts of propylene glycol methyl ether acetate

[0051] 20-25 parts xylene.

[0052] Furthermore, the present invention provides a method for preparing the all-matte anti-fading topcoat, comprising: mixing the components A, B and C evenly according to their respective component ratios, and then blending the components A, B and C evenly according to the usage ratio.

[0053] Preferably, the preparation method of component A includes: mixing soybean oil fatty acid modified alkyd resin, a portion of butyl acetate and polyacetyl wax antisettling agent, then adding defoamer, leveling agent and wetting and dispersing agent, then adding matting agent and dispersing to a fineness ≤20μm, and finally adding the remaining butyl acetate and propylene glycol methyl ether acetate to obtain component A.

[0054] Preferably, the portion of butyl acetate is 30% to 50% of the total weight of butyl acetate.

[0055] Preferably, soybean oil fatty acid modified alkyd resin, a portion of butyl acetate and polyacetyl wax antisettling agent are mixed and stirred at 500-800 r / min for 10-15 min. Then, defoamer, leveling agent and wetting and dispersing agent are added and stirred at 500-800 r / min for 10-15 min. Next, matting agent is added and stirred at 1000-1200 r / min for 20-30 min to disperse until the fineness is ≤20 μm. Finally, the remaining butyl acetate and propylene glycol methyl ether acetate are added to obtain component A (main agent).

[0056] As is known in the art, the dispersion may include operations of crushing, dispersing and mixing slurry raw materials of different viscosities. By operating the equipment at high speed, the materials are subjected to high-speed and intense shearing, crushing and dispersing to achieve the functions of rapid mixing, dissolving, dispersing and / or refining.

[0057] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0058] This invention proposes a fully matte, anti-blooming topcoat for low-temperature use, solving the problem of blooming paint film that occurs during application of existing topcoats in winter. It enables application at -10℃ without blooming during drying and features excellent film smoothness, leveling properties, high hardness, and fullness at low temperatures. This fully matte, anti-blooming topcoat requires no adjustment to spraying equipment or changes to existing application methods, and can improve delivery efficiency for furniture factories, demonstrating broad application prospects. Detailed Implementation

[0059] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this invention, not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0060] Unless otherwise specified, all methods used in the examples were conventional or performed according to techniques or conditions described in the literature in this field, or in accordance with the product instructions. Reagents and instruments used without specified manufacturers were all conventional products that could be purchased from legitimate channels.

[0061] Example 1

[0062] This embodiment provides a fully matte anti-fading topcoat (clear topcoat), composed of component A, component B, and component C. The preparation method of component A (main agent) includes:

[0063] Mix 80 kg of soybean oil fatty acid modified alkyd resin (Zhuhai Zhancheng New Material Co., Ltd., 1160-70), 3 kg of butyl acetate, and 1 kg of anti-settling agent (HX8800 produced by Guangzhou Huaxia Chemical Co., Ltd.) and stir at 500 r / min for 10 min.

[0064] Slowly add 0.4 kg of defoamer (BYK141 manufactured by BYK GmbH, Germany), 0.1 kg of leveling agent (BYK333 manufactured by BYK GmbH, Germany), and 0.5 kg of dispersant (BYK104 manufactured by BYK GmbH, Germany) and mix. Disperse at 500 r / min for 10 min.

[0065] Slowly add 8 kg of matting powder (ZC-518 matting powder produced by Shaoguan Ruijing New Material Technology Co., Ltd.), and stir and disperse at 1000 r / min for 20 min until the fineness is ≤20 μm;

[0066] Finally, add 4 kg of butyl acetate and 3 kg of propylene glycol methyl ether acetate, disperse evenly, and package separately.

[0067] The preparation methods for component B include:

[0068] 40 kg of trimer (OK-50AB from Zhuhai Zhancheng New Materials), 40 kg of adduct (L-75 produced by Bayer AG, Germany) and 20 kg of butyl acetate were mixed, dispersed evenly, and packaged separately.

[0069] The preparation methods of component C include:

[0070] Mix 55 kg of butyl acetate, 20 kg of xylene, 5 kg of propylene glycol methyl ether acetate and 20 kg of ethyl acetate evenly and package them separately.

[0071] Example 2

[0072] This embodiment provides a fully matte anti-fading topcoat (clear topcoat), composed of component A, component B, and component C. The preparation method of component A (main agent) includes:

[0073] Mix 78 kg of soybean oil fatty acid modified alkyd resin (Zhuhai Zhancheng New Material Co., Ltd., 1160-70), 3 kg of butyl acetate, and 1 kg of anti-settling agent (HX8800 produced by Guangzhou Huaxia Chemical Co., Ltd.) and stir at 500 r / min for 10 min.

[0074] Slowly add 0.4 kg of defoamer (BYK141 manufactured by BYK GmbH, Germany), 0.3 kg of leveling agent (AFCONA3777 manufactured by Evcona GmbH), and 0.5 kg of dispersant (BYK104 manufactured by BYK GmbH, Germany) and mix. Disperse at 500 r / min for 10 min.

[0075] Slowly add 8 kg of matting powder (Grace 7000 matting powder from the USA), and stir and disperse at 1000 r / min for 20 min until the fineness is ≤20 μm;

[0076] Finally, add 5.8 kg of butyl acetate and 3 kg of propylene glycol methyl ether acetate, disperse evenly, and package separately.

[0077] The preparation methods for component B include:

[0078] 40 kg of trimer (OK-50AB from Zhuhai Zhancheng New Materials), 40 kg of adduct (L-75T produced by Bogao Company) and 20 kg of butyl acetate were mixed, dispersed evenly, and packaged separately.

[0079] The preparation methods of component C include:

[0080] Mix and disperse 35 kg of butyl acetate, 25 kg of xylene, 25 kg of propylene glycol methyl ether acetate and 15 kg of dimethyl carbonate evenly and package them separately.

[0081] Comparative Example 1

[0082] This comparative example provides a fully matte anti-fading topcoat (clear topcoat), which differs from Example 1 only in that the soybean oil fatty acid modified alkyd resin is replaced with an equal amount of Changxing 3106-X-70 alkyd resin.

[0083] Comparative Example 2

[0084] This comparative example provides a fully matte anti-settling topcoat (clear topcoat), which differs from Example 1 only in that the anti-settling agent is replaced with an equal amount of Better BK-3229 polyamide wax paste.

[0085] Comparative Example 3

[0086] This comparative example provides a fully matte anti-fading topcoat (clear topcoat), which differs from Example 1 only in that the leveling agent is replaced with an equal amount of Better BF-6210 acrylate leveling agent.

[0087] Comparative Example 4

[0088] This comparative example provides a fully matte anti-fading topcoat (clear topcoat), which differs from Example 1 only in that the dispersant is replaced with an equal amount of gold-infused KEPERDISP®-608S.

[0089] Comparative Example 5

[0090] This comparative example provides a fully matte anti-fading topcoat (clear topcoat), which differs from Example 1 only in that the trimer is replaced with an equal amount of Covestro IL-1451.

[0091] Comparative Example 6

[0092] This comparative example provides a fully matte anti-fading topcoat (clear topcoat), which differs from Example 1 only in that the matting powder is replaced with an equal amount of Xinhui HD-150.

[0093] Experimental Example 1

[0094] The performance of the fully matte anti-blooming topcoat prepared in the above embodiments and comparative examples was tested. The test items and test results are shown in Table 1.

[0095] Table 1

[0096]

[0097] Experimental Example 2

[0098] The fully matte anti-blooming topcoat prepared in the above examples and comparative examples was compared with a commercially available PU fully matte clear topcoat of the same grade. The test process is as follows:

[0099] 1. Material processing: The material is a rectangular solid black wood board measuring 100cm*90cm. First, use 240# sandpaper to sand it to remove burrs and blow away the dust.

[0100] 2. Apply PU primer: Mix the PU primer (Zhancheng New Materials) with oil and spray at a rate of 110 g / m². 2 Polishing will be carried out after 24 hours;

[0101] 3: Repeat step 2 above;

[0102] 4. Sanding: Use 400# sandpaper to sand the surface until it is smooth, shiny, and free of bright spots, then use 600# sandpaper to polish it.

[0103] 5: The fully matte anti-fading topcoat prepared in the above examples and comparative examples was mixed with a commercially available PU fully matte clear topcoat of the same grade and sprayed on a test plate. The application viscosity was 12s, and the spraying rate was 110 g / m². 2 Dry at -10℃ for 12 hours.

[0104] The test items and test results are shown in Table 2.

[0105] Table 2

[0106]

[0107] Note: 5 points is the highest and 0 points is the lowest.

[0108] Therefore, it can be seen that the all-matte anti-blooming topcoat of the present invention can be applied at -10℃ without heating in the drying room, and can also obtain a smooth and perfect paint film without blooming. Moreover, the smoothness and uniformity of the paint film are good at low temperatures. Furthermore, by selecting matting powder and TDI trimer, the transparency and fullness of the all-matte anti-blooming topcoat used at low temperatures are greatly improved, thereby improving construction efficiency and reducing construction costs.

[0109] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A fully matte anti-fading topcoat, characterized in that, It includes components A, B, and C, wherein component A comprises the following parts by weight: The leveling agent is at least one of fluorocarbon modified polyacrylate leveling agent and polyether modified polydimethylsiloxane copolymer leveling agent. Component B comprises the following components in parts by weight: Trimer 35-40 parts 40-50 parts of adduct 10-25 parts of butyl acetate; Component C comprises the following components in parts by weight: The matting agent is a composite spherical matting agent; The trimer is a polyisocyanate trimer; The wetting and dispersing agent is a low molecular weight unsaturated polycarboxylic acid polymer solution; The adduct is a toluene diisocyanate adduct; The anti-settling agent is HX8800 produced by Guangzhou Huaxia Chemical Co., Ltd.

2. The all-matte anti-fading topcoat according to claim 1, characterized in that, The weight ratio of components A, B, and C is 1:(0.4–0.6):(0.4–0.6).

3. The all-matte anti-fading topcoat according to claim 1, characterized in that, The trimer is a toluene diisocyanate trimer.

4. The all-matte anti-fading topcoat according to claim 1, characterized in that, The defoamer is a mineral oil-based defoamer that does not contain silicone.

5. The all-matte anti-fading topcoat according to claim 1, characterized in that, Component A comprises the following components in parts by weight: Component B comprises the following components in parts by weight: Trimer 35-40 parts 40-45 parts of adduct 20-25 parts of butyl acetate; Component C comprises the following components in parts by weight:

6. The method for preparing the all-matte anti-fading topcoat according to any one of claims 1 to 5, characterized in that, include: Mix components A, B, and C evenly according to their respective proportions, and then blend components A, B, and C evenly according to the usage ratio.

7. The preparation method according to claim 6, characterized in that, The preparation method of component A includes: mixing soybean oil fatty acid modified alkyd resin, a portion of butyl acetate and anti-settling agent, then adding defoamer, leveling agent and wetting and dispersing agent, then adding matting agent and dispersing to a fineness ≤20μm, and finally adding the remaining butyl acetate and propylene glycol methyl ether acetate to obtain component A.

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