Solvent type crystal-permeable color paste as well as preparation method and application thereof

Abstract

The invention belongs to the technical field of coatings, and particularly relates to solvent-type crystal-permeable color paste as well as a preparation method and application thereof. The solvent-type crystal-permeable color paste comprises the following components in percentage by mass: 5%-10% of aldehyde ketone resin, 2%-7% of butyl acetate cellulose, 25%-40% of propylene glycol methyl ether acetate, 5%-15% of a dispersing agent, 15%-25% of nanoscale pigment and 20%-30% of butyl acetate, wherein the total mass of the solvent-type crystal-permeable color paste is 100%. In the solvent-type crystal penetration color paste, the aldehyde ketone resin has excellent nanoscale pigment wettability and dispersing performance, the butyl acetate cellulose contains butyryl besides hydroxyl and acetyl, the toughness and the water resistance are high, and the wider the solvent selection range is, the better the water resistance is. The propylene glycol methyl ether acetate and the butyl acetate are matched, so that the solubility of the nanoscale pigment and the resin can be improved. Through the combined action of all the components, the characteristics of excellent transparency, excellent color intensity, good permeability and the like are achieved.

Description

Technical Field

[0001] This application belongs to the technical field of coatings, and particularly relates to a solvent-based crystal-clear color paste, its preparation method and application. Background Art

[0002] Oil-based color paste is a kind of color paste with organic solvents as the dispersion medium, which is widely used in fields such as coatings, inks, plastics, etc. Oil-based color paste can provide high color saturation and bright colors, and is suitable for applications that require bright colors. Oil-based color paste has good solubility in a variety of organic solvents, can be compatible with various resins and solvents, and is convenient for formula design. At present, the oil-based color pastes sold on the market are all products formed by using alkyd resin or synthetic fatty acid resin as raw materials and adding wetting and dispersing agents to improve the dispersion of pigments, and they have advantages such as good coloring power and good covering power.

[0003] However, currently, oil-based color pastes generally have drawbacks such as poor permeability, transparency, and layering. Summary of the Invention

[0004] The purpose of this application is to provide a solvent-based crystal-clear color paste, its preparation method and application, aiming to solve the problems of poor permeability, transparency, and layering of existing oil-based color pastes to a certain extent.

[0005] To achieve the above application purpose, the technical solution adopted in this application is as follows:

[0006] In the first aspect, this application provides a solvent-based crystal-clear color paste. Based on the total mass of the solvent-based crystal-clear color paste being 100%, it includes the following components in mass percentage:

[0007]

[0008]

[0009] In some possible implementation manners, the nano-scale pigment includes nano-titanium dioxide.

[0010] In some possible implementation manners, the average particle size of the nano-titanium dioxide is 30nm - 50nm.

[0011] In some possible implementation manners, the nano-titanium dioxide is selected from rutile-type nano-titanium dioxide surface-treated with aluminum hydroxide.

[0012] In some possible implementation manners, the nano-titanium dioxide is selected from at least one of nano-titanium dioxide PGNR-B508L of Sichuan Jinyahui Technology Co., Ltd., nano-titanium dioxide PGNR-B508H of Sichuan Jinyahui Technology Co., Ltd., and nano-titanium dioxide TR-33 of Jiangxi Tianguang Titanium Industry.

[0013] In some possible implementation manners, the aldehyde-ketone resin is selected from the polymerization resins formed by polycondensation of aldehydes and ketones.

[0014] In some possible implementation manners, the cellulose acetate butyrate is selected from the cellulose acetate butyrate obtained by making acetic anhydride through the high-temperature cracking method of acetic acid and then making butyl anhydride through the acid anhydride exchange method of the acetic anhydride and butyric acid.

[0015] In some possible implementation manners, the dispersant is selected from the high-molecular structure of polyether-modified polyamide type combined with an unsaturated polycarboxylic acid and a polysiloxane copolymer solvent.

[0016] In some possible implementation manners, the aldehyde-ketone resin is selected from at least one of BASF A81, CFA-81 of Kelifu, and INT-120 of Yueyang Yingtai.

[0017] In some possible implementation manners, the cellulose acetate butyrate is selected from at least one of CAB381-20 of Eastman, CAB381-2 of Eastman, and Solus2100 of Wanbang Yucheng Chemical Industry.

[0018] In some possible implementation manners, the dispersant is selected from UNIQ SPERSE 680U and UNIQSPERSE 765S of Youka Company.

[0019] In some possible implementation manners, the solvent-based crystal-clear color paste has a Stormer viscosity of 55 ku to 65 ku at 25 °C.

[0020] In some possible implementation manners, the fineness of the solvent-based crystal-clear color paste is greater than 0 and not higher than 3 μm.

[0021] In a second aspect, the present application provides a preparation method of a solvent-based crystal-clear color paste, including the following steps:

[0022] Mix 5 parts to 10 parts of aldehyde-ketone resin, 2 parts to 7 parts of cellulose acetate butyrate, 25 parts to 35 parts of propylene glycol methyl ether acetate, 5 parts to 15 parts of dispersant, 15 parts to 25 parts of nano-level pigment, and 20 parts to 30 parts of butyl acetate for mixing treatment to make a paste-like semi-finished product;

[0023] Grind the semi-finished product to the target fineness to obtain the product of the solvent-based crystal-clear color paste.

[0024] In some possible implementation manners, the rotation speed of the mixing treatment is 600 rpm to 1500 rpm.

[0025] In some possible implementation manners, the target fineness is greater than 0 and not higher than 3 μm.

[0026] In some possible implementation manners, the solvent-based crystal clear color paste has a Stormer viscosity of 55 ku to 65 ku at 25 °C.

[0027] In a third aspect, the present application provides a coating material, which contains the above-mentioned solvent-based crystal clear color paste and / or the solvent-based crystal clear color paste prepared by the above method.

[0028] For the solvent-based crystal clear color paste provided in the first aspect of the present application, the aldehyde-ketone resin is the most excellent in terms of transparency, tolerance and weather resistance. Due to its excellent pigment wetting and dispersion properties, it is particularly suitable for formulating general-purpose pigment pastes, improving the compatibility of pigment pastes, increasing the pigment content and storage stability. In addition to hydroxyl and acetyl groups, cellulose acetate butyrate also contains butyryl groups. Generally, the acetyl group content is 6% to 33%, and the butyryl group content is 17% to 48%. The properties of cellulose acetate butyrate vary with the contents of the three groups. The content of butyryl groups has a great influence on solubility, flexibility, tensile strength, hardness, melting point, etc. As the butyryl group content increases, the density decreases, the toughness and water resistance increase, and the solvent selection range becomes wider. Therefore, a compound of aldehyde-ketone resin and cellulose acetate butyrate is used. Among them, the dosages and combinations of aldehyde-ketone resin and cellulose acetate butyrate directly affect the workability of the solvent-based crystal clear color paste. If the content is too low, the encapsulation of nano-scale pigments will be unstable. If the content is too high, there will be too much film-forming substance in the color paste, resulting in the overall performance of the film formed by the color paste becoming brittle, difficult to operate, and at the same time affecting the transparency of the film-forming substance, resulting in poor penetration and layering of the color paste. Nano-scale pigments in the color paste are nano-scale products. Due to their small particle size, such pigments have excellent transparency and color strength. At the same time, appropriate dosages are selected. If the content of nano-scale pigments in the color paste is too high, the viscosity of the color paste will increase, the cost pressure will be great, and the transparency of the color paste will be affected. If the content of nano-scale pigments is too low, the color paste will not be easily colored. The dosage of the dispersant is determined according to the dosage of nano-scale pigments. Too much or too little will cause floating color and blooming. Propylene glycol methyl ether acetate and butyl acetate are both solvents. The combination of propylene glycol methyl ether acetate and butyl acetate mainly considers the solubility in nano-scale pigments and resins. The dosages of propylene glycol methyl ether acetate and butyl acetate directly affect the operability and solubility of the color paste. Therefore, the dosages of propylene glycol methyl ether acetate and butyl acetate in the color paste of the present application are finally determined after the dosages of other components in the system have been determined. The ratio between the two is mainly determined according to the evaporation rate. Through the combined action of each component, the solvent-based crystal clear color paste of the present application has the characteristics of excellent transparency, excellent color strength and good permeability.

[0029] The preparation method of the solvent-based crystal-clear color paste provided by the second aspect of the present application is as follows: After mixing 5-10 parts of aldehyde-ketone resin, 2-7 parts of cellulose acetate butyrate, 25-35 parts of propylene glycol methyl ether acetate, 5-15 parts of dispersant, 15-25 parts of nano-grade pigment, and 20-30 parts of butyl acetate to form a paste-like semi-finished product, it is sanded to the target fineness to obtain the product of the solvent-based crystal-clear color paste. The preparation process is simple and suitable for large-scale industrial production and application. The prepared solvent-based crystal-clear color paste has the characteristics of excellent transparency, high color strength, and good permeability.

[0030] The coating provided by the third aspect of the present application contains the above-mentioned solvent-based crystal-clear color paste. This solvent-based crystal-clear color paste has the characteristics of excellent transparency, high color strength, and good permeability, and can be widely applied to various coatings. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0032] Figure 1 It is a schematic flowchart of the preparation method of the solvent-based crystal-clear color paste provided by the embodiment of the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0033] In order to make the technical problems to be solved, technical solutions, and beneficial effects of the present application clearer, the following further details the present application in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0034] In the present application, the term "and / or" describes the association relationship of associated objects and indicates that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. Where A and B can be singular or plural. The character " / " generally represents an "or" relationship between the front and back associated objects.

[0035] In the present application, "at least one" means one or more, and "a plurality" means two or more. "At least one (item)" or its similar expression refers to any combination of these items, including any combination of single item (item) or plural items (items). For example, "at least one (item) of a, b, or c", or "at least one (item) of a, b, and c" can both represent: a, b, c, a - b (that is, a and b), a - c, b - c, or a - b - c, where a, b, and c can be single or multiple respectively.

[0036] It should be understood that in various embodiments of the present application, the magnitudes of the serial numbers of the above processes do not imply the order of execution, and some or all of the steps can be executed in parallel or sequentially. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.

[0037] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms "a" and "the" used in the embodiments of the present application and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise.

[0038] The weights of the relevant components mentioned in the embodiments of the present application specification not only can refer to the specific contents of each component, but also can represent the proportional relationship of the weights between each component. Therefore, as long as the contents of the relevant components in the embodiments of the present application specification are scaled up or down proportionally, they are within the scope disclosed in the embodiments of the present application specification. Specifically, the mass described in the embodiments of the present application specification can be mass units well-known in the chemical industry such as μg, mg, g, kg, etc.

[0039] The terms "first" and "second" are only used for descriptive purposes, to distinguish objects such as substances from each other, and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. For example, without departing from the scope of the embodiments of the present application, the first XX can also be referred to as the second XX, and similarly, the second XX can also be referred to as the first XX. Thus, the features defined with "first" and "second" can explicitly or implicitly include one or more of such features.

[0040] The first aspect of the embodiments of the present application provides a solvent-based crystal clear color paste. Based on the total mass of the solvent-based crystal clear color paste being 100%, it includes the following components in mass percentage:

[0041]

[0042] The solvent-based crystal clear color paste provided by the first aspect of the embodiment of the present application. Aldehyde-ketone resin is the most excellent in terms of transparency, tolerance and weather resistance. Due to its excellent pigment wetting and dispersion properties, it is particularly suitable for formulating general-purpose pigment pastes, improving the compatibility of pigment pastes, increasing the pigment content and storage stability. And cellulose acetate butyrate contains not only hydroxyl and acetyl groups, but also butyryl groups. Generally, the acetyl group content is 6% - 33%, and the butyryl group content is 17% - 48%. The properties of cellulose acetate butyrate vary with the contents of the three groups. The content of butyryl group has a great influence on solubility, flexibility, tensile strength, hardness, melting point, etc. As the butyryl group content increases, the density decreases, the toughness and water resistance increase, and the solvent selection range becomes wider. Therefore, a compound of aldehyde-ketone resin and cellulose acetate butyrate is used. Among them, the dosage and combination of aldehyde-ketone resin and cellulose acetate butyrate directly affect the workability of the solvent-based crystal clear color paste. If the content is too low, it will lead to unstable encapsulation of nano-scale pigments. If the content is too high, there will be too much film-forming substance in the color paste, resulting in the overall performance of the color paste film becoming brittle, difficult to operate, and affecting the transparency of the film-forming substance, resulting in poor penetration and layering of the color paste. Nano-scale pigments in the color paste are nano-scale products. This type of pigment has excellent transparency and color strength due to its small particle size. At the same time, a suitable dosage is selected. If the content of nano-scale pigments is too high, the viscosity of the color paste will increase, the cost pressure will be great, and it will affect the transparency of the color paste. If the content of nano-scale pigments is too low, the color paste is not easy to color. The dosage of the dispersant is determined according to the dosage of nano-scale pigments. Too much or too little will cause floating color and blooming. Propylene glycol methyl ether acetate and butyl acetate are both solvents. The combination of propylene glycol methyl ether acetate and butyl acetate mainly considers the solubility in nano-scale pigments and resins. The dosage levels of propylene glycol methyl ether acetate and butyl acetate directly affect the operability and solubility of the color paste. Therefore, the dosages of propylene glycol methyl ether acetate and butyl acetate in the color paste of the embodiment of the present application are finally determined after the dosages of other components in the system have been determined. The ratio between the two is mainly determined according to the evaporation rate. Through the joint action of each component, the solvent-based crystal clear color paste of the embodiment of the present application has the characteristics of excellent transparency, excellent color strength, good permeability, etc.

[0043] The solvent-based crystal clear color paste of the embodiment of the present application has extremely high transparency, can maintain the natural texture and color of the substrate, and is suitable for applications that require a transparent effect. Moreover, the color paste can provide excellent gloss, making the surface of the coating or printed matter more bright and beautiful. The color paste can enhance the adhesion to the substrate and improve the durability and stability of the coating. The color paste can improve the leveling property of the coating, making the surface smoother and more uniform, and reducing defects such as orange peel and brush marks. At the same time, the color paste has excellent chemical resistance, can resist the erosion of chemical substances such as acids, alkalis, and solvents, and improves the durability of the coating.

[0044] In some possible implementation manners, in the solvent-based crystal-clear color paste, the mass percentage content of aldehyde-ketone resin can be any typical but non-limiting point value such as 5%, 6%, 7%, 8%, 9%, 10%, etc. or an interval value between any two point values; the mass percentage content of cellulose acetate butyrate can be any typical but non-limiting point value such as 2%, 3%, 4%, 5%, 6%, 7%, etc. or an interval value between any two point values; the mass percentage content of propylene glycol methyl ether acetate can be any typical but non-limiting point value such as 25%, 26%, 28%, 30%, 32%, 34%, 35%, 36%, 37%, 38%, 39%, 40%, etc. or an interval value between any two point values; the mass percentage content of the dispersant can be any typical but non-limiting point value such as 5%, 8%, 10%, 12%, 13%, 14%, 15%, etc. or an interval value between any two point values; the mass percentage content of the nano-level pigment can be any typical but non-limiting point value such as 15%, 18%, 20%, 22%, 23%, 24%, 25%, etc. or an interval value between any two point values; the mass percentage content of butyl acetate can be any typical but non-limiting point value such as 20%, 22%, 24%, 25%, 26%, 28%, 30%, etc. or an interval value between any two point values.

[0045] In some possible implementation manners, the nano-level pigment includes nano titanium dioxide. The oil absorption of nano titanium dioxide is relatively high. At this time, the solvent-based crystal-clear color paste is a solvent-based crystal-clear white paste, which is mainly applied to series of furniture products such as solid wood suites and solid wood high-end customization.

[0046] In some possible implementation manners, the average particle size of the nano titanium dioxide is 30 nm to 50 nm. Exemplarily, the average particle size of the nano titanium dioxide can be any typical but non-limiting point value such as 30 nm, 35 nm, 40 nm, 43 nm, 45 nm, 50 nm, etc. or an interval value between any two point values. In this case, the small particle size of the nano titanium dioxide is beneficial to being uniformly dispersed into the color paste, ensuring that the color paste has a certain covering power and making the color paste have excellent transparency. In some embodiments, the particle morphology of the nano titanium dioxide is nearly ellipsoidal.

[0047] In some possible implementation manners, the nano titanium dioxide is selected from rutile-type nano titanium dioxide surface-treated with aluminum hydroxide. In this case, the rutile-type nano titanium dioxide surface-treated with aluminum hydroxide improves the surface characteristics of the nano titanium dioxide, reduces the surface activation energy of the nano titanium dioxide, improves the dispersibility of the nano titanium dioxide, and finally achieves the dispersibility of the nano titanium dioxide in the terminal system. In some embodiments, when the nano titanium dioxide nucleates, it is subjected to liquid-phase surface treatment with an aluminum sulfate solution, and then washed, dried, and calcined to obtain rutile-type nano titanium dioxide surface-treated with aluminum hydroxide.

[0048] In some possible implementation manners, the nano-titanium dioxide is selected from at least one of nano-titanium dioxide PGNR-B508L of Sichuan Jinyahui Technology Co., Ltd., nano-titanium dioxide PGNR-B508H of Sichuan Jinyahui Technology Co., Ltd., and nano-titanium dioxide TR-33 of Jiangxi Tianguang Titanium Industry. These nano-titanium dioxides have good dispersibility and can improve the color strength of the solvent-based crystal clear color paste. Specifically, these nano-titanium dioxides have excellent light scattering properties, can significantly improve the hiding power of the color paste, and effectively cover the underlying color or pattern. Although these nano-titanium dioxides have high hiding power, they can also provide good transparency in specific formulations and are suitable for applications that require transparent or semi-transparent effects. In addition, these nano-titanium dioxides have excellent dispersion properties, can be evenly dispersed in the color paste, avoid agglomeration, improve the stability and use effect of the color paste. These nano-titanium dioxides also have excellent weather resistance, can resist the influence of ultraviolet rays, moisture and temperature changes, and extend the service life of the color paste.

[0049] In some possible implementation manners, the aldehyde-ketone resin is a polymer resin formed by polycondensation of aldehydes and ketones. In this case, the aldehyde-ketone resin has excellent nano-level pigment wetting and dispersion properties, is particularly suitable for formulating general-purpose nano-level pigment color pastes, improves the compatibility of nano-level pigment color pastes, and increases the content and storage stability of nano-level pigments.

[0050] In some possible implementation manners, the aldehyde-ketone resin is selected from at least one of BASF A81, CFA-81 of Kelifu, and INT-120 of Yueyang Yingtai. These aldehyde-ketone resins have multiple advantages such as excellent solubility, high gloss, adhesion, leveling property, chemical resistance, quick drying property, abrasion resistance, environmental protection and safety, and versatility in the color paste, can improve the compatibility of nano-level pigment color pastes, and increase the content and storage stability of nano-level pigments.

[0051] In some possible implementation manners, the cellulose acetate butyrate is prepared by making acetic anhydride from acetic acid by high-temperature cracking method, and then making butyl anhydride from acetic anhydride and butyric acid by acid anhydride exchange method. In some embodiments, using refined cotton linter as a catalyst with sulfuric acid, acetic acid and butyric acid as solvents to carry out homogeneous esterification reaction with acetic butyric anhydride to obtain a crude product, and then through hydrolysis, neutralization, precipitation, washing, cooking, and drying to obtain the final product of cellulose acetate butyrate. The solvent-based crystal clear white color paste is mainly used in the semi-transparent color correction system and has relatively high requirements for the wettability of the substrate. In the embodiments of the present application, through the screening of long-oil alkyd resin, castor oil resin, linseed oil resin, polyester modified resin and cellulose acetate butyrate, finally considering aspects such as transparency, weather resistance, tolerance of different resin systems and wettability, the blending method of aldehyde-ketone resin and cellulose acetate butyrate is selected.

[0052] In some possible implementation manners, cellulose acetate butyrate is selected from at least one of CAB381-20 of Eastman, CAB381-2 of Eastman, and Solus2100 of Wanbang Yucheng Chemical Industry. These cellulose acetate butyrates have excellent properties such as toughness, water resistance, wettability, and dispersibility. When combined with aldehyde-ketone resin, they can significantly improve the color strength, permeability, and transparency of solvent-based crystal clear color pastes. Among them, CAB-381-20 can effectively improve the leveling property of the color paste, enabling the color paste to be more evenly distributed on the surface of the substrate during application. It can also inhibit sagging and cratering phenomena, thereby reducing surface defects and improving the aesthetics and quality of the coating. CAB-381-20 can accelerate the release of the solvent from the paint film, helping to shorten the drying time of the color paste and improve production efficiency. When CAB-381-20 is added to the color paste, it can enhance the abrasion resistance, making the coating more durable. At the same time, it can also maintain the color stability, making the coating color more persistent and vivid. CAB381-2 of Eastman and Solus2100 of Wanbang Yucheng Chemical Industry also have similar effects to CAB-381-20.

[0053] In some possible implementation manners, the dispersant is selected from a polymer structure of a polyether-modified polyamide type combined with an unsaturated polycarboxylic acid and a polysiloxane copolymer solvent. Among them, the polymer structure product of the polyether-modified polyamide type has good dispersion and stability for both organic and inorganic nano-scale pigments, has a strong viscosity reduction effect, excellent transparency and gloss, and can effectively improve the color strength and saturation of nano-scale pigments. The unsaturated polycarboxylic acid and polysiloxane copolymer solvent has a high molecular weight and is a wetting dispersant used to control flocculation in solvent-based systems. It can effectively prevent floating and blooming when nano-titanium dioxide and colored nano-scale pigments are combined in medium-polarity to high-polarity coating systems, and the silicon-containing component has the property of improving floating and blooming.

[0054] In some possible implementation manners, the dispersant is selected from UNIQ SPERSE 680U and UNIQ SPERSE 765S of UCA Company. Among them, as a high-performance dispersant, UNIQ SPERSE 680U shows excellent wetting and dispersing properties for both inorganic nano-scale pigments and organic nano-scale pigments. Whether in aqueous systems or solvent-based systems, efficient nano-scale pigment dispersion can be achieved, improving the uniformity and stability of the color paste. As an anti-floating color and blooming dispersant, UNIQ SPERSE 765S can effectively prevent the floating color and blooming of nano-scale pigments in the color paste, further enhancing the dispersion effect of the color paste. In addition, UNIQ SPERSE 680U has a strong viscosity-reducing effect, which can significantly reduce the viscosity of the color paste, making the color paste easier to operate and spray during application. Compound advantage: When the two are compounded and used, the viscosity-reducing effect can be further enhanced, improving the fluidity and construction performance of the color paste. Moreover, UNIQ SPERSE 680U can significantly improve the color strength and saturation of nano-scale pigments, making the color paste present a more vivid and full color effect during application. After being compounded with UNIQ SPERSE 765S, this effect is further enhanced, making the color performance of the color paste more excellent. Both UNIQ SPERSE 680U and UNIQ SPERSE 765S have good storage stability, and can maintain the performance of the color paste unchanged for a long time. After the two are compounded, the storage stability of the color paste can be further improved, reducing the performance degradation caused by changes in storage conditions. Therefore, the compound of UNIQ SPERSE 680U and UNIQ SPERSE 765S of UCA Company used as a dispersant has advantages such as excellent dispersion performance, significant viscosity-reducing effect, improving the color strength and saturation of nano-scale pigments, good storage stability, and a wide range of application fields in the color paste.

[0055] In some possible implementation manners, the solvent-based crystal clear color paste has a Stormer viscosity of 55 ku to 65 ku at 25 °C; specifically, the Stormer viscosity can be any typical but non-limiting point value such as 55 ku, 56 ku, 57 ku, 58 ku, 59 ku, 60 ku, 61 ku, 62 ku, 63 ku, 64 ku, 65 ku or an interval value between any two point values. In this case, the solvent-based crystal clear color paste has a suitable viscosity for construction applications.

[0056] In some possible implementation manners, the fineness of the solvent-based crystal clear color paste is greater than 0 and not higher than 3 μm. Exemplarily, the fineness of the solvent-based crystal clear color paste can be 0.1 μm, 0.5 μm, 1 μm, 1.5 μm, 2 μm, 2.5 μm, 3 μm, 3.5 μm, 4 μm, 4.5 μm, 5 μm, etc., which are typical but non-limiting arbitrary point values or interval values between any two point values. The fineness has a great influence on the vividness and color intensity of nano-scale pigments. If the particle size is too large, it will affect the stability and is not conducive to dilution with solvents. If the particle size is too small, it will damage the structure of the nano-scale pigments themselves. When the fineness is greater than 0 and not higher than 3 μm, the transparency, permeability, color intensity and other properties of the solvent-based crystal clear color paste can be better improved.

[0057] The solvent-based crystal clear color paste in the above embodiments of the present application can be prepared by the following example methods.

[0058] In a second aspect, an embodiment of the present application provides a preparation method of a solvent-based crystal clear color paste, as shown in the attached Figure 1 figure, including the following steps:

[0059] S10. Mix 5 to 10 parts of aldehyde-ketone resin, 2 to 7 parts of cellulose acetate butyrate, 25 to 40 parts of propylene glycol methyl ether acetate, 5 to 15 parts of dispersant, 15 to 25 parts of nano-scale pigment, and 20 to 30 parts of butyl acetate for mixing treatment to make a paste-like semi-finished product;

[0060] S20. Grind the semi-finished product to the target fineness to obtain the product of the solvent-based crystal clear color paste.

[0061] The preparation method of the solvent-based crystal clear color paste provided by the embodiment of the present application mixes 5 to 10 parts of aldehyde-ketone resin, 2 to 7 parts of cellulose acetate butyrate, 25 to 40 parts of propylene glycol methyl ether acetate, 5 to 15 parts of dispersant, 15 to 25 parts of nano-scale pigment, and 20 to 30 parts of butyl acetate to make a paste-like semi-finished product, and then grinds it to the target fineness to obtain the product of the solvent-based crystal clear color paste. The preparation process is simple and is suitable for industrial large-scale production and application. The prepared solvent-based crystal clear color paste has excellent transparency, excellent color intensity, good permeability and other characteristics.

[0062] In some possible implementation manners, the rotation speed of the mixing treatment is 600 rpm to 1500 rpm. Exemplarily, the rotation speed of the mixing treatment can be 600 rpm, 700 rpm, 800 rpm, 900 rpm, 1000 rpm, 1100 rpm, 1200 rpm, 1300 rpm, 1400 rpm, 1500 rpm, etc., which are typical but non-limiting arbitrary point values or interval values between any two point values. In this case, each component can be dispersed and mixed at a high speed to make a paste-like semi-finished product.

[0063] In some possible implementation manners, the target fineness is greater than 0 and not higher than 3 μm. In this case, the fineness has a great influence on the vividness and color strength of the solvent-based crystal clear color paste, and at the same time ensures the stability of the solvent-based crystal clear color paste.

[0064] In some possible implementation manners, the Stormer viscosity of the solvent-based crystal clear color paste at 25 °C is 55 ku to 65 ku. In this case, the solvent-based crystal clear color paste has a suitable viscosity, which is convenient for construction applications.

[0065] In some possible implementation manners, the nano-pigment includes nano-titanium dioxide.

[0066] In some possible implementation manners, the average particle size of the nano-titanium dioxide is 30 nm to 50 nm.

[0067] In some possible implementation manners, the nano-titanium dioxide is selected from rutile nano-titanium dioxide surface-treated with aluminum hydroxide.

[0068] In some possible implementation manners, the nano-titanium dioxide is selected from at least one of nano-titanium dioxide PGNR-B508L of Sichuan Jinyahui Technology Co., Ltd., nano-titanium dioxide PGNR-B508H of Sichuan Jinyahui Technology Co., Ltd., and nano-titanium dioxide TR-33 of Jiangxi Tianguang Titanium Industry.

[0069] In some possible implementation manners, the aldehyde-ketone resin is a polymer resin formed by polycondensation of aldehydes and ketones.

[0070] In some possible implementation manners, the aldehyde-ketone resin is selected from at least one of BASF A81, CFA-81 of Kelifu, and INT-120 of Yueyang Yingtai.

[0071] In some possible implementation manners, the cellulose acetate butyrate is selected from cellulose acetate butyrate obtained by pyrolyzing acetic acid at high temperature to form acetic anhydride, and then reacting acetic anhydride with butyric acid by acid anhydride exchange method to form butyric anhydride.

[0072] In some possible implementation manners, the cellulose acetate butyrate is selected from at least one of CAB381-20 of Eastman, CAB381-2 of Eastman, and Solus2100 of Wanbang Yucheng Chemical Industry.

[0073] In some possible implementation manners, the dispersant is selected from a polymer structure of polyether-modified polyamide type combined with an unsaturated polycarboxylic acid and a polysiloxane copolymer solvent.

[0074] In some possible implementation manners, the dispersant is selected from UNIQ SPERSE 680U and UNIQSPERSE 765S of Youka Company.

[0075] The beneficial effects of the above embodiments of the present application have been discussed in detail above and will not be elaborated here.

[0076] In a third aspect, an embodiment of the present application provides a coating, which contains the above solvent-based crystal clear color paste and / or the solvent-based crystal clear color paste prepared by the above method.

[0077] The coating in the embodiment of the present application contains the above solvent-based crystal clear color paste, which has excellent transparency, excellent color strength, good permeability and other characteristics, and can be widely used in various coatings.

[0078] In some possible implementation manners, the solvent-based crystal clear color paste prepared in the embodiment of the present application is mainly used together with the main color rubbing agent, and is mainly applied in the fields of solid wood suites and whole-house customized furniture.

[0079] In some specific embodiments, the steps for brushing the paint film on a solid wood suite or whole-house customized furniture include: 1. Sanding the material; 2. Color rubbing (main color rubbing agent + solvent-based crystal clear color paste); 3. Base color correction (color correction main agent + solvent-based crystal clear color paste + colored color paste); 4. Primer; 5. Sanding; 6. Primer; 7. Sanding; 8. Color correction; 9. Sanding; 10. Topcoat.

[0080] To enable those skilled in the art to clearly understand the above implementation details and operations of the present application, and to significantly reflect the advanced performance of the solvent-based crystal clear color paste and its preparation method in the embodiments of the present application, the following technical solutions will be illustrated by multiple embodiments.

[0081] Example 1

[0082] A solvent-based crystal clear white paste, the components and weight ratios include: 6 kg of BASF A81 aldehyde-ketone resin, 2 kg of Eastman CAB381-20 cellulose acetate butyrate, 36 kg of propylene glycol methyl ether acetate, 6 kg of dispersants UNIQ SPERSE680U and UNIQ SPERSE 765S from Youka Company, 20 kg of nano-titanium dioxide PGNR-B508L (particle morphology is nearly ellipsoidal, average particle size is about 43 nm) from Sichuan Jinyahui Technology Co., Ltd. and 30 kg of acetate butyrate.

[0083] The preparation method of the solvent-based crystal clear white paste includes the steps:

[0084] Mix various component materials in proportion and disperse them at a high speed of 1000 rpm to prepare a paste-like semi-finished product; then grind it through a sand mill until the fineness is ≤ 3 μm to obtain a qualified solvent-based crystal clear white paste product.

[0085] Example 2

[0086] A solvent-based crystal-clear white paste, the components and weight ratios thereof include: 10 kg of BASF A81 aldehyde-ketone resin, 5 kg of Eastman CAB381-20 cellulose acetate butyrate, 30 kg of propylene glycol methyl ether acetate, 10 kg of UNIQ SPERSE680U and UNIQ SPERSE 765S dispersants from Youka Company, 15 kg of nano-titanium dioxide PGNR-B508L (particle morphology is nearly ellipsoidal, average particle size is about 43 nm) from Sichuan Jin Yahui Technology Co., Ltd., and 30 kg of acetate butyrate.

[0087] The preparation method of the solvent-based crystal-clear white paste in the embodiment of the present application refers to Example 1.

[0088] Example 3

[0089] A solvent-based crystal-clear white paste, the components and weight ratios thereof include: 5 kg of BASF A81 aldehyde-ketone resin, 7 kg of Eastman CAB381-20 cellulose acetate butyrate, 33 kg of propylene glycol methyl ether acetate, 10 kg of UNIQ SPERSE680U and UNIQ SPERSE 765S dispersants from Youka Company, 15 kg of nano-titanium dioxide PGNR-B508L (particle morphology is nearly ellipsoidal, average particle size is about 43 nm) from Sichuan Jin Yahui Technology Co., Ltd., and 30 kg of acetate butyrate.

[0090] The preparation method of the solvent-based crystal-clear white paste in the embodiment of the present application refers to Example 1.

[0091] Example 4

[0092] A solvent-based crystal-clear white paste, the components and weight ratios thereof include: 10 kg of BASF A81 aldehyde-ketone resin, 5 kg of Eastman CAB381-20 cellulose acetate butyrate, 25 kg of propylene glycol methyl ether acetate, 10 kg of UNIQ SPERSE680U and UNIQ SPERSE 765S dispersants from Youka Company, 20 kg of nano-titanium dioxide PGNR-B508L (particle morphology is nearly ellipsoidal, average particle size is about 43 nm) from Sichuan Jin Yahui Technology Co., Ltd., and 30 kg of acetate butyrate.

[0093] The preparation method of the solvent-based crystal-clear white paste in the embodiment of the present application refers to Example 1.

[0094] Example 5

[0095] A solvent-based crystal-clear white paste, the components and weight ratios include: 8 kg of BASF A81 aldehyde-ketone resin, 7 kg of Eastman CAB381-20 cellulose acetate butyrate, 30 kg of propylene glycol methyl ether acetate, 15 kg of dispersants UNIQ SPERSE680U and UNIQ SPERSE 765S from Youka Company, 20 kg of nano-titanium dioxide PGNR-B508L (particle morphology is nearly ellipsoidal, average particle size is about 43 nm) from Sichuan Jinyahui Technology Co., Ltd., and 20 kg of butyl acetate.

[0096] The preparation method of the solvent-based crystal-clear white paste in the embodiment of the present application refers to Example 1.

[0097] Example 6

[0098] A solvent-based crystal-clear white paste, the components and weight ratios include: 9 kg of BASF A81 aldehyde-ketone resin, 6 kg of Eastman CAB381-20 cellulose acetate butyrate, 35 kg of propylene glycol methyl ether acetate, 15 kg of dispersants UNIQ SPERSE680U and UNIQ SPERSE 765S from Youka Company, 15 kg of nano-titanium dioxide PGNR-B508L (particle morphology is nearly ellipsoidal, average particle size is about 43 nm) from Sichuan Jinyahui Technology Co., Ltd., and 20 kg of butyl acetate.

[0099] The preparation method of the solvent-based crystal-clear white paste in the embodiment of the present application refers to Example 1.

[0100] Comparative Example 1

[0101] A solvent-based crystal-clear white paste, the components and weight ratios include: 4 kg of BASF A81 aldehyde-ketone resin, 1 kg of Eastman CAB381-20 cellulose acetate butyrate, 36 kg of propylene glycol methyl ether acetate, 4 kg of dispersants UNIQ SPERSE680U and UNIQ SPERSE 765S from Youka Company, 20 kg of nano-titanium dioxide PGNR-B508L (particle morphology is nearly ellipsoidal, average particle size is about 43 nm) from Sichuan Jinyahui Technology Co., Ltd., and 35 kg of butyl acetate.

[0102] The preparation method of the solvent-based crystal-clear white paste in Comparative Example 1 refers to Example 1.

[0103] Comparative Example 2

[0104] A solvent-based crystal-clear white paste, the components and their weight ratios include: 7 kg of BASF A81 aldehyde-ketone resin, 5 kg of Eastman CAB381-20 cellulose acetate butyrate, 34 kg of propylene glycol methyl ether acetate, 4 kg of dispersants UNIQ SPERSE680U and UNIQ SPERSE 765S from Youka Company, 20 kg of nano-titanium dioxide PGNR-B508L (particle morphology is nearly ellipsoidal, average particle size is about 43 nm) from Sichuan Jin Yahui Technology Co., Ltd., and 30 kg of butyl acetate.

[0105] The preparation method of the solvent-based crystal-clear white paste of this Comparative Example 1 refers to Example 1.

[0106] Comparative Example 3

[0107] A solvent-based crystal-clear white paste, the components and their weight ratios include: 10 kg of BASF A81 aldehyde-ketone resin, 7 kg of Eastman CAB381-20 cellulose acetate butyrate, 34 kg of propylene glycol methyl ether acetate, 4 kg of dispersants UNIQ SPERSE680U and UNIQ SPERSE 765S from Youka Company, 20 kg of nano-titanium dioxide PGNR-B508L (particle morphology is nearly ellipsoidal, average particle size is about 43 nm) from Sichuan Jin Yahui Technology Co., Ltd., and 30 kg of butyl acetate.

[0108] The preparation method of the solvent-based crystal-clear white paste of this Comparative Example 1 refers to Example 1.

[0109] Comparative Example 4

[0110] A solvent-based crystal-clear white paste, the components and their weight ratios include: 7 kg of BASF A81 aldehyde-ketone resin, 5 kg of Eastman CAB381-20 cellulose acetate butyrate, 40 kg of propylene glycol methyl ether acetate, 4 kg of dispersants UNIQ SPERSE680U and UNIQ SPERSE 765S from Youka Company, 14 kg of nano-titanium dioxide PGNR-B508L (particle morphology is nearly ellipsoidal, average particle size is about 43 nm) from Sichuan Jin Yahui Technology Co., Ltd., and 30 kg of butyl acetate.

[0111] The preparation method of the solvent-based crystal-clear white paste of this Comparative Example 1 refers to Example 1.

[0112] In the solvent-based crystal-clear color pastes provided by the above examples and comparative examples, the components and their weight ratios are shown in Table 1 below:

[0113] Table 1

[0114]

[0115] To verify the progressiveness of the examples of this application, the following performance tests were carried out on the above examples and comparative examples respectively:

[0116] 1. Stormer viscosity test method at 25°C: The "viscosity" involved in the embodiments of the present application refers to the dynamic viscosity measured at a pressure of 101.325 kPa and a temperature of 23 ± 2°C, measured using a Stormer viscometer. The test method follows GB / T 1723-1993, and the unit is KU.

[0117] 2. Transparency test method: The "transparency" involved in the embodiments of the present application refers to the light transmittance of the test sample compared with the standard solution through a colorimetric tube at a constant temperature of 23°C to determine whether the test sample is turbid. The test method follows GB / T 1721-2008.

[0118] 3. Color strength test method: In the embodiments of the present application, "color strength is also called tinting strength". The color strength of the color paste is a measure of its ability to impart color to other materials. The determination method of the color strength of the present application follows GB / T5211.19-88.

[0119] 4. Penetration test method: The penetration of the coating refers to the ability of the coating to penetrate the surface of the substrate and form a protective layer. The penetration test method in the embodiments of the present application follows GB / T 18384-2002.

[0120] Table 2

[0121]

[0122] From the above test results, it can be seen that the solvent-based crystal clear color paste prepared in the embodiments of the present application has excellent transparency, high color strength, excellent color development, and good penetration. In addition, it can also be seen from the above test results that increasing the resin content will affect the viscosity and color strength, while too low resin content will lead to low color strength of the film-forming substance and reduced penetration.

[0123] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A solvent-based crystal clear color paste, characterized in that, Based on the total mass of the solvent-based crystal-clear color paste being 100%, it includes components with the following mass percentages:

2. The solvent-based crystal-clear color paste according to claim 1, wherein The nano-level pigment includes nano-titanium dioxide. And / or, the average particle size of the nano-titanium dioxide is 30nm to 50nm.

3. The solvent-based crystal-clear color paste according to claim 2, wherein The nano-titanium dioxide is selected from rutile-type nano-titanium dioxide surface-treated with aluminum hydroxide. And / or, the nano-titanium dioxide is selected from at least one of nano-titanium dioxide PGNR-B508L of Sichuan Jinyahui Technology Co., Ltd., nano-titanium dioxide PGNR-B508H of Sichuan Jinyahui Technology Co., Ltd., and nano-titanium dioxide TR-33 of Jiangxi Tianguang Titanium Industry.

4. The solvent-based crystal-clear color paste according to any one of claims 1 to 3, characterized in that, The aldehyde-ketone resin is selected from polymerization resins formed by polycondensation of aldehydes and ketones. And / or, the cellulose acetate butyrate is made by pyrolyzing acetic acid at high temperature to form acetic anhydride, and then using the acid anhydride exchange method with butyric acid to make butyric anhydride to obtain cellulose acetate butyrate. And / or, the dispersant is selected from a polymer structure of polyether-modified polyamide combined with an unsaturated polycarboxylic acid and a polysiloxane copolymer solvent.

5. The solvent-based crystal clear color paste according to claim 4, wherein, The aldehyde-ketone resin is selected from at least one of BASF A81, CFA-81 of Kelifu, INT-120 of Yueyang Yingtai, CB of Degussa, and KYA81 of Yueyang Keyuan. And / or, the cellulose acetate butyrate is selected from at least one of CAB381-20 of Eastman, CAB381-2 of Eastman, Solus2100 of Wanbang Yucheng Chemical Industry, CAB381-2 of Longbang, and CAB381-2 of Hongyan. And / or, the dispersant is selected from UNIQ SPERSE 680U and UNIQ SPERSE 765S of Youka Company.

6. The solvent-based crystal clear color paste according to any one of claims 1 to 3 or 5, characterized in that The solvent-based crystal-clear color paste has a Stormer viscosity of 55ku to 65ku at 25°C. And / or, the fineness of the solvent-based crystal-clear color paste is greater than 0 and not higher than 3μm.

7. A preparation method of a solvent-based crystal-clear color paste, characterized in that, It includes the following steps: Mix 5 to 10 parts of aldehyde-ketone resin, 2 to 7 parts of cellulose acetate butyrate, 25 to 35 parts of propylene glycol methyl ether acetate, 5 to 15 parts of dispersant, 15 to 25 parts of nano-level pigment, and 20 to 30 parts of acetic acid butyl ester to make a paste-like semi-finished product. Grind the semi-finished product to the target fineness to obtain the product of the solvent-based crystal-clear color paste.

8. The preparation method of the solvent-based crystal clear color paste according to claim 7, characterized in that, The rotation speed of the mixing process is 600rpm to 1500rpm.

9. The preparation method of the solvent-based crystal-clear color paste according to any one of claims 7 or 8, characterized in that, The target fineness is greater than 0 and not higher than 3μm; And / or, the solvent-based crystal-clear color paste has a Stormer viscosity of 55ku to 65ku at 25°C.

10. A coating, characterized in that, The coating contains the solvent-based crystal-clear color paste as described in any one of claims 1 to 6 and / or the solvent-based crystal-clear color paste prepared by the method as described in any one of claims 7 to 9.

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