阅读说明：本技术 涂料组合物及涂布制品 (Coating composition and coated article ) 是由 张鸿仁 于 2020-06-18 设计创作，主要内容包括：一种涂料组合物,包括主接着剂、改质剂、平滑剂、填充剂、副接着剂、以及颜料。主接着剂占涂料组合物总重量的含量为约65.0～85.0wt％。改质剂占涂料组合物总重量的含量为约5.0～15.0wt％。平滑剂占涂料组合物总重量的含量为约5.0～15.0wt％。填充剂占涂料组合物总重量的含量为约1.0～3.0wt％。副接着剂占涂料组合物总重量的含量为约0.5～10.0wt％。颜料占涂料组合物总重量的含量为约1.0～10.0wt％。此涂料组合物不含有机溶剂,因此不会产生有机溶剂挥发的问题。(A coating composition includes a primary adhesive, a modifier, a smoothing agent, a filler, a secondary adhesive, and a pigment. The primary adhesive is present in an amount of about 65.0 to 85.0 wt% based on the total weight of the coating composition. The modifier is present in an amount of about 5.0 to 15.0 wt% based on the total weight of the coating composition. The smoothing agent is present in an amount of about 5.0 to 15.0 wt% based on the total weight of the coating composition. The filler is present in an amount of about 1.0 to 3.0 wt% based on the total weight of the coating composition. The secondary adhesive is present in an amount of about 0.5 to 10.0 wt% based on the total weight of the coating composition. The pigment is present in an amount of about 1.0 to 10.0 wt% based on the total weight of the coating composition. The coating composition does not contain an organic solvent, so that the problem of volatilization of the organic solvent is avoided.)

1. A coating composition, comprising:

a main adhesive, which accounts for 65.0-85.0 wt% of the total weight of the coating composition;

a modifier, which accounts for 5.0-15.0 wt% of the total weight of the coating composition;

a smoothing agent, which accounts for 5.0-15.0 wt% of the total weight of the coating composition;

a filler, which accounts for 1.0-3.0 wt% of the total weight of the coating composition;

a secondary adhesive, which accounts for 0.5-10.0 wt% of the total weight of the coating composition; and

the pigment accounts for 1.0-10.0 wt% of the total weight of the coating composition.

2. The coating composition of claim 1, wherein the primary adhesive comprises polyester, polyurethane, polyvinyl chloride, ethylene vinyl acetate copolymer, or combinations thereof.

3. The coating composition of claim 1, wherein the primary adhesive is an ethylene-vinyl acetate copolymer having a melting point of 70 ℃ to 100 ℃.

4. The coating composition of claim 3, wherein the ethylene-vinyl acetate copolymer contains vinyl acetate in an amount of 5.0 to 40.0 wt% based on the total weight of the ethylene-vinyl acetate copolymer.

5. The coating composition of claim 3, wherein the ethylene-vinyl acetate copolymer has a melt index of 20 to 90g/10 min.

6. The coating composition of claim 1, wherein the primary adhesive is a polyurethane having a melting point of 110 ℃ to 140 ℃.

7. The coating composition of claim 6, wherein the polyurethane has a melt index of 15 to 30g/10 min.

8. The coating composition of claim 1, wherein the modifier comprises low density polyethylene, high density polyethylene, linear low density polyethylene, or a combination thereof.

9. The coating composition of claim 1, wherein the smoothing agent comprises beeswax, white wax, microcrystalline wax, polyethylene wax, or a combination thereof.

10. The coating composition of claim 1, wherein the filler comprises talc, zinc stearate, calcium carbonate, or combinations thereof.

11. The coating composition of claim 1, wherein the secondary adhesive comprises a maleic resin, an alkylphenol resin, a pentaerythritol rosin ester, a hydrogenated petroleum resin, or a combination thereof.

12. The coating composition of claim 1, wherein the coating composition has a melting point of 100 ℃ to 180 ℃.

13. A coated article, comprising:

a substrate having a surface; and

a coating covering the surface of the substrate, and the coating comprising the coating composition of claim 1.

14. The coated article of claim 12, wherein the substrate is wood.

Technical Field

The invention relates to a coating composition and a coated product.

Background

Generally, common oil paint coatings added with organic solvents, such as nitrolacquer and the like, not only cause the problem of environmental pollution, but also damage human health due to volatilization of the organic solvents during drying. In addition, oil-based paint coatings typically require multiple applications to achieve the desired quality. In the process of multiple coating, after the oil paint coating is coated on the substrate, the next coating can be carried out after the oil paint coating is dried. Therefore, the coating efficiency using the oil paint coating is low, thereby affecting productivity.

In addition, although the common water paint has no problem of solvent volatilization, the common water paint is not easy to dry. Therefore, drying equipment (such as a dryer, a conveyor belt, etc.) is usually provided to accelerate drying, so that an additional space is required to accommodate the drying equipment. In addition, the aqueous paint easily absorbs moisture in the environment, resulting in unstable coating quality.

Disclosure of Invention

The invention aims to provide a coating composition which does not contain organic solvent and can simultaneously achieve the coating quality, and a coated product.

According to some embodiments of the present invention, there is provided a coating composition comprising a primary adhesive, a modifier, a leveler, a filler, a secondary adhesive, and a pigment. The primary adhesive is present in an amount of about 65.0 to 85.0 wt% based on the total weight of the coating composition. The modifier is present in an amount of about 5.0 to 15.0 wt% based on the total weight of the coating composition. The smoothing agent is present in an amount of about 5.0 to 15.0 wt% based on the total weight of the coating composition. The filler is present in an amount of about 1.0 to 3.0 wt% based on the total weight of the coating composition. The secondary adhesive is present in an amount of about 0.5 to 10.0 wt% based on the total weight of the coating composition. The pigment is present in an amount of about 1.0 to 10.0 wt% based on the total weight of the coating composition.

According to some embodiments of the present invention, the primary adhesive comprises Polyester (Polyester), Polyurethane (PU), Polyvinyl Chloride (PVC), Ethylene-vinyl acetate copolymer (EVA), or a combination thereof.

According to some embodiments of the invention, the primary adhesive is an ethylene-vinyl acetate copolymer having a melting point of about 70 ℃ to 100 ℃.

According to some embodiments of the present invention, the vinyl acetate is present in the ethylene-vinyl acetate copolymer in an amount of about 5.0 to 40.0 wt% based on the total weight of the ethylene-vinyl acetate copolymer.

According to some embodiments of the invention, the ethylene-vinyl acetate copolymer has a melt index of about 20 to 90g/10 min.

According to some embodiments of the invention, the primary adhesive is a polyurethane having a melting point of about 110 ℃ to 140 ℃.

According to some embodiments of the invention, the polyurethane has a melt index of about 15 to 30g/10 min.

According to some embodiments of the invention, the modifier comprises Low Density Polyethylene (LDPE), High Density Polyethylene (HDPE), Linear Low Density Polyethylene (LLDPE), or a combination thereof.

According to some embodiments of the invention, the smoothing agent comprises Beeswax (Beeswax), white Wax (Paraffin Wax), Microcrystalline Wax (Microcrystalline Wax), Polyethylene Wax (PE Wax), or combinations thereof.

According to some embodiments of the invention, the filler comprises talc (talc powder), zinc stearate (zinc stearate), Calcium stearate (Calcium stearate), Calcium carbonate (Calcium carbonate), or a combination thereof.

According to some embodiments of the present invention, the secondary adhesive includes Maleic acid resin (Maleic acid resin), alkylphenol resin (Alkyl phenolic resin), Rosin pentaerythritol ester (Rosin pentaerythrite ester), Hydrogenated petroleum resin (Hydrogenated hydrocarbon resin), or a combination thereof.

According to some embodiments of the invention, the coating composition has a melting point of about 100 to 180 ℃.

According to some embodiments of the present invention, there is provided a coated article comprising a substrate and a coating. The coating covers the surface of the substrate, and the coating comprises the coating composition described above.

According to some embodiments of the invention, the substrate comprises wood.

Compared with the prior art of nitrolacquer and other coatings which need to use organic solvents, the coating composition provided by the invention has the advantages that: the coating composition does not contain an organic solvent, so that the problem of volatilization of the organic solvent is avoided, and the coating composition is environment-friendly; when the coating composition is coated on a substrate, the coating composition can be quickly cured to form a coating which is attached to the surface of the substrate and is not sticky, so that the coating efficiency is improved; if the coating needs to be repeated, the time for waiting for forming can be greatly shortened; and drying equipment is not required to be additionally arranged, so that the space can be saved.

Drawings

Aspects of the present disclosure will become more fully apparent from the following detailed description when read in conjunction with the accompanying drawings. It is noted that, in accordance with standard practice in the industry, the various features are not drawn to scale. In fact, the dimensions of the various features may be arbitrarily increased or reduced for clarity of discussion.

FIG. 1 is a schematic view of a coated article according to certain embodiments of the present invention;

wherein, the notation:

100 coated article 110 substrate

112 substrate surface 120 coating

H1 thickness.

Detailed Description

In one aspect, the present invention provides a coating composition comprising a primary adhesive, a modifier, a smoothing agent, a filler, a secondary adhesive, and a pigment. In some embodiments, the coating composition has a melting point of 100 ℃ to 180 ℃. Details of the components of the coating composition are detailed below.

The content of the main adhesive in the total weight of the coating composition is 65.0-85.0 wt%. For example about 66, 68, 70, 72, 75, 80, 82 or 84 wt%. The primary adhesive in the above content range can provide the coating composition with good adhesion. If the content of the main adhesive is less than 65 wt%, the coating adhesion is poor; if the amount is more than 85% by weight, the coating composition has a high viscosity and is difficult to mold. In some embodiments, the primary adhesive comprises Polyester (Polyester), Polyurethane (PU), Polyvinyl Chloride (PVC), Ethylene-vinyl acetate copolymer (EVA), or combinations thereof.

In some embodiments, the primary adhesive may be an ethylene-vinyl acetate copolymer having a melting point of about 70 ℃ to 100 ℃. The main adhesive in the melting point range is close to the melting point of other components in the coating composition, and is suitable for the preparation operation of the coating composition. In addition, the melting point of the primary adhesive will affect the melting point of the coating composition. In some embodiments, vinyl acetate is present in an amount of about 5.0 to 40.0 wt%, such as about 7, 10, 15, 20, 23, 25, 30, 35, 37, 39 wt%, based on the total weight of the ethylene-vinyl acetate copolymer. The ethylene-vinyl acetate copolymer having the above vinyl acetate content has good adhesion and is suitable for use in paints. In some embodiments, the ethylene-vinyl acetate copolymer has a melt index of about 20 to 90g/10min, such as about 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85g/10 min. The coating composition comprising the ethylene-vinyl acetate copolymer having the melt index range has optimum adhesion to wood poles and is suitable for coating wood poles.

In other embodiments, the primary adhesive may be a polyurethane having a melting point of about 110 ℃ to 140 ℃. The coating composition comprising the polyurethane having the above melting point range as a main adhesive and other additives has the most suitable fluidity and viscosity for coating on wood poles. In some embodiments, the polyurethane has a melt index of about 15 to 30g/10min, such as about 17, 20, 22, 25, 28, 29g/10 min. Coating compositions comprising polyurethanes within this melt index range have optimal adhesion to wood poles.

The modifier accounts for 5.0-15.0 wt% of the total weight of the coating composition. For example about 7, 10, 11, 13 or 14 wt%. The modifier has good chemical stability and can resist acid, alkali and salt aqueous solution. Therefore, the addition of the modifier in the above content range can enhance the stability of the coating composition. In some embodiments, the modifier comprises Low Density Polyethylene (LDPE), High Density Polyethylene (HDPE), Linear Low Density Polyethylene (LLDPE), or combinations thereof.

The content of the smoothing agent in the total weight of the coating composition is 5.0-15.0 wt%. For example about 6, 8, 10, 13 or 14 wt%. If the content of the smoothing agent is less than 5 wt%, the surface of a coating formed after the coating composition is cured is rough; if the content of the smoothing agent is more than 15% by weight, the coating composition may have poor coating adhesion. In some embodiments, the smoothing agent comprises Beeswax (Beeswax), white Wax (Paraffin Wax), Microcrystalline Wax (Microcrystalline Wax), Polyethylene Wax (PE Wax), or a combination thereof.

The filler accounts for 1.0-3.0 wt% of the total weight of the coating composition. For example about 1.2, 1.5, 2, 2.3, 2.5 or 2.7 wt%. In some embodiments, the filler comprises talc (talc powder), zinc stearate (zinc stearate), Calcium stearate (Calcium stearate), Calcium carbonate (Calcium carbonate), or a combination thereof.

The content of the auxiliary adhesive in the total weight of the coating composition is 0.5-10.0 wt%. For example about 0.8, 1, 1.5, 3, 5, 7, 8 or 9. The addition of the auxiliary adhesive in the above-mentioned content range can provide the coating composition with good adhesion. If the content of the sub-adhesive is less than 0.5 wt%, the coating adhesion is poor; if it exceeds 10.0 wt%, the viscosity of the coating composition becomes too high, making molding difficult. In some embodiments, the secondary adhesive includes Maleic acid resin (Maleic acid resin), alkylphenol resin (Alkyl phenolic resin), pentaerythritol Rosin ester (Rosin pentaerythrite ester), Hydrogenated petroleum resin (Hydrogenated hydrocarbon resin), or a combination thereof.

The pigment accounts for 1.0-10.0 wt% of the total weight of the coating composition. For example about 2, 3, 5, 7, 8 or 9. In some embodiments, the pigment comprises an organic pigment, an inorganic pigment, or a combination thereof. In some embodiments, the pigment has good temperature resistance such that the pigment has good stability when the coating composition is in a molten state. By way of example, the pigment may be, but is not limited to, c.i. pigment White 6, c.i. pigment Red 101, 170, 185, c.i. pigment Orange 13, 34, c.i. pigment Yellow 1, 3, 42, 55, c.i. pigment Blue 15:1, 15:3, c.i. pigment Geen 7, c.i. pigment Black 7, c.i. pigment Violet 23, Aluminum (Aluminum), mica (mica), or iron oxide (ferrite oxide).

Another aspect of the present invention provides a coated article. Fig. 1 is a schematic perspective view of a coated article 100 according to some embodiments of the present invention. Referring to fig. 1, a coated article 100 includes a substrate 110 and a coating 120 covering a surface 112 of the substrate. In some embodiments, substrate 110 may include wood, but is not limited thereto. For example, the substrate 110 may be a wood-tipped pencil. It should be understood that the shape of the substrate 110 is not limited to that shown in FIG. 1, and that suitable substrates 110 may be selected as desired.

Coating 120 can include any of the coating compositions previously described. In some embodiments, coating 120 is a matte coating. In other embodiments, the coating 120 is a gloss coating. Specifically, the gloss effect exhibited by the surface of the coating 120 can be controlled by controlling the ratio of the leveler to the filler in the coating composition. In some embodiments, the coating 120 can protect the substrate 110 and has a slip-resistant effect. Specifically, the surface smoothness of the coating layer 120 can be controlled by controlling the ratio of the smoothing agent to the sub-adhesive in the coating composition. In some embodiments, the thickness H1 of the coating 120 is about 250-350 μm, but is not limited thereto. Specifically, as the temperature increases, the fluidity of the coating increases, and when the coating is applied to the substrate 110, the coating 120 having a small thickness can be formed. On the other hand, when the temperature is lowered and the fluidity of the coating is reduced, the coating can form a thick coating layer 120 when applied to the substrate 110. Therefore, the thickness of the coating layer 120 can be adjusted by controlling the fluidity of the coating material through temperature. In some embodiments, by adjusting the fluidity of the coating, only one application is required to obtain the desired thickness of the coating layer 120. In other embodiments, the coating may be repeatedly applied to the substrate 110 to obtain a multi-layered coating 120.

In some embodiments, the method of forming the coated article 100 may comprise the following steps. First, any of the coating compositions described above is mixed uniformly and heated to about 110 ℃ to 230 ℃ to form a fully molten coating. Then, the temperature of the coating is reduced to about 110-200 ℃, and the coating is placed in a coating hopper. Then, the coating temperature is maintained constant and the substrate 110 is passed through the coating hopper at a constant speed to uniformly apply the coating to the surface 112 of the substrate 110. Finally, the coating is cooled to solidify to form a coating 120 adhered to the surface 112 of the substrate 110 to form the coated article 100.

The following examples are presented to illustrate specific aspects of the present invention and to enable those of ordinary skill in the art to practice the invention. However, the following examples should not be construed as limiting the invention.

Example 1: and (4) preparing the coating.

100g of an ethylene-vinyl acetate copolymer, 10g of low-density polyethylene, 11g of white wax, 3g of calcium stearate, 2g of rosin pentaerythritol ester and 3.5g of a pigment were placed in a heating and stirring tank. The mixture was stirred for 10 minutes without heating to mix it uniformly. And then, starting the heating and stirring tank to 160 ℃, and heating while stirring to completely melt the mixture to form the coating.

Example 2: forming a coated article.

The coating material of example 1, which was melted uniformly, was cooled to 130 ℃ and allowed to thermally stabilize for 15 minutes, after which the coating material was allowed to flow into a coating hopper. The coating hopper was heated around to maintain the coating temperature at 130 ℃. Then, the log holder is conveyed at a fixed speed and passes through a coating hopper to complete one-time coating. Thereby, a coating layer having a thickness of about 300 μm was formed on the surface of the raw wood barrel, and a coated product was obtained.

Example 3: and (4) preparing the coating.

80g of polyvinyl chloride, 13g of low-density polyethylene, 15g of white wax, 2g of calcium stearate, 1g of rosin pentaerythritol ester and 4.5g of pigment are placed in a heating and stirring tank. The mixture was stirred for 10 minutes without heating to mix it uniformly. And then, starting the heating and stirring tank to 160 ℃, and heating while stirring to completely melt the mixture to form the coating.

Example 4: forming a coated article.

The coating melted uniformly in example 3 was cooled to 120 ℃ and allowed to flow into a coating hopper after 15 minutes of thermal stabilization. The coating hopper was heated around to maintain the coating temperature at 120 ℃. Then, the log holder is conveyed at a fixed speed and passes through a coating hopper to complete one-time coating. Thereby, a coating layer having a thickness of about 300 μm was formed on the surface of the raw wood barrel, and a coated product was obtained.

As described above, according to embodiments of the present invention, a coating composition and a coated article are provided. The coating composition does not contain an organic solvent, so that compared with a coating such as nitrolacquer which needs to use an organic solvent, the coating composition does not generate the problem of volatilization of the organic solvent, and is environment-friendly. In addition, when the coating composition is coated on a substrate, the coating composition can be quickly cured to form a coating which is attached to the surface of the substrate without adhesion, so that the coating efficiency is improved. If the coating is repeated, the time for waiting for forming can be greatly shortened. Therefore, no extra drying equipment is needed, and the space can be saved.