Anti-ultraviolet herba lysimachiae mineral pigment and preparation method thereof

Abstract

The invention discloses an anti-ultraviolet euphorbia wolfiana mineral pigment and a preparation method, and relates to the technical field of pigments and preparation methods thereof, the euphorbia wolfiana mineral pigment comprises an ore pigment and an euphorbia wolfiana extract, and the euphorbia wolfiana extract is from the root of euphorbia wolfiana. The herba lysimachiae mineral pigment obtained by adding the herba lysimachiae extract into the mineral pigment does not influence the hue, lightness, saturation, covering power and the like of the pigment, can also improve the light resistance of the pigment, and has the advantages of aging resistance, discoloration delaying, bacteria resistance and the like.

Description

Technical Field

[0001] The invention relates to the technical field of pigments and preparation methods thereof, and in particular to an anti-ultraviolet wolfberry mineral pigment and a preparation method thereof. Background Art

[0002] Mineral pigments are a crucial component of coatings, and their properties significantly impact their functionality. Traditional mineral pigments, such as titanium dioxide and red iron oxide, are widely used in a variety of fields, including architecture, industry, and art, thanks to their excellent hiding power, tinting strength, and chemical stability. These pigments disperse evenly within coatings, forming a dense coating that effectively blocks moisture and oxygen erosion, thereby extending the lifespan of the coated object. However, with the continuous advancement of technology and increasing application demands, the performance of traditional mineral pigments is increasingly unable to meet the high-performance requirements of the modern coatings industry.

[0003] In recent years, composite inorganic pigments have emerged. By combining two or more inorganic compounds, they combine the advantages of multiple mineral pigments and exhibit even superior performance. Composite inorganic pigments not only inherit the excellent hiding power and tinting strength of traditional mineral pigments, but also enhance their weather resistance and chemical resistance to a certain extent, making them more widely applicable in complex environments. For example, in outdoor architectural coatings, composite inorganic pigments can better resist the erosion of harsh environments such as acid rain and salt spray, maintaining the paint's vibrant color and coating integrity.

[0004] However, despite their excellent durability and color retention, composite inorganic pigments still have significant shortcomings in terms of UV resistance. Long-term exposure to UV rays can damage the pigment's molecular structure, leading to fading and discoloration, as well as coating aging. This aging not only affects the coating's appearance but also reduces its protective properties and shortens its service life.

[0005] Therefore, how to improve the UV resistance of composite inorganic pigments has become a key issue that needs to be urgently addressed in the current coatings industry. Summary of the Invention

[0006] The object of the present invention is to provide an anti-ultraviolet wolfberry mineral pigment and a preparation method thereof, so as to solve the problem of low anti-ultraviolet ability of composite inorganic pigments in the prior art.

[0007] First, an embodiment of the present invention provides an anti-ultraviolet wolfberry mineral pigment, comprising a mineral pigment and a wolfberry extract, wherein the wolfberry extract is derived from the root of wolfberry.

[0008] As an optional embodiment, the mineral pigment includes one of cinnabar, realgar, orpiment, malachite and lapis lazuli.

[0009] As an optional embodiment, the wolfsbane extract can absorb ultraviolet rays.

[0010] Secondly, the embodiment of the present invention also provides a method for preparing an ultraviolet-resistant wolfsbane mineral pigment, comprising the following steps: S1: Grind the mineral pigment into powder; S2: sequentially preparing the extract of wolfsbane root and powdered mineral pigment, and drying them to obtain wolfsbane mineral pigment.

[0011] As an optional embodiment, the wolfsbane root extract is obtained by dissolving a crude wolfsbane root extract in ethanol; The wolfsbane root crude extract is obtained by crushing the wolfsbane root, soaking it in ethanol, and then sequentially performing concentration and evaporation, cooling and desugaring, and further concentration.

[0012] As an optional implementation method, during the soaking process, the mass ratio of wolfsbane roots to ethanol is 1:10-30, the soaking time is 5-10 days, and the cooling and desugaring time is 2-4 days.

[0013] As an optional implementation manner, during the concentration and evaporation process, 1 / 12 to 1 / 8 of the volume of ethanol is evaporated, and the mass ratio of wolfsbane root to ethanol in the wolfsbane root crude extract is 1:0.8 to 3.75.

[0014] As an optional implementation manner, in the process of dissolving the crude extract of wolfsbane root to prepare the wolfsbane root extract, the mass ratio of the crude extract of wolfsbane root to ethanol is 1:20-25.

[0015] As an optional implementation manner, the mass ratio of the mineral pigment to the wolfberry root extract in S2 is 1:1~5.

[0016] As an optional embodiment, the drying method in S2 includes naturally drying the mixture into powder within 20 to 30 hours.

[0017] Compared with the prior art, the embodiments of the present invention have the following advantages and beneficial effects: 1. The wolfsbane mineral pigment obtained by adding wolfsbane extract to the mineral pigment in the embodiment of the present invention not only does not affect the hue, brightness, saturation, hiding power, etc. of the pigment, but also can increase the light resistance of the pigment, and has the advantages of anti-aging, delayed discoloration, and antibacterial.

[0018] 2. The present invention enhances color fixation and anti-aging properties of a mineral pigment by mixing it with a prepared wolfsbane extract and then injecting the wolfsbane extract into the mineral pigment without altering its original color. This method has a simple process, convenient operation, and low processing cost, and can be widely used in coatings and painting materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 A flow chart for preparing the UV-resistant wolfsbane mineral pigment provided in an embodiment of the present invention; Figure 2 Schematic diagram of the UV-visible spectrophotometer test results of the root extract of Stellera abhamae in Example 1 of the present invention; Figure 3 For the actual picture, Figure 3 a is a real picture of the original mineral pigment. Figure 3 b is a real picture of wolfsbane extract; Figure 4 This is a comparison of the original realgar mineral pigment before and after aging. Figure 4 a is a real picture of the original realgar mineral pigment before aging. Figure 4 b is a real picture of the original realgar mineral pigment before aging; Figure 5 Comparison of wolfsbane and realgar mineral pigments before and after aging, Figure 5 a is a real picture of wolfsbane and realgar mineral pigment before aging. Figure 5 b is a real picture of the aged wolfberry and realgar mineral pigment; Figure 6 The figure is a comparison of the UV-visible reflectance spectra of Example 1 and the original realgar pigment; Figure 7 is a graph showing the ultraviolet reflectance of an embodiment of the present invention, wherein Figure 7 a is the ultraviolet reflectance curve of wolfsbane cinnabar; Figure 7 b is the ultraviolet reflectance curve of wolfsbane and realgar, Figure 7 c is the ultraviolet reflectance curve of wolfberry orpiment, Figure 7 d is the ultraviolet reflectance curve of wolfsbane lapis lazuli, Figure 7 e is the ultraviolet reflectance curve of wolfsbane malachite mineral pigment.

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0023] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0024] In the description of the present invention, it should be noted that the terms "first", "second", "third", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0025] Example The present invention provides a method for preparing an anti-ultraviolet wolfberry mineral pigment, comprising the following steps (eg Figure 1 shown): Step 1: Prepare the raw mineral pigments The primary processed powdered mineral pigments are used as the basis, and then the mineral pigments are ground and filtered twice through an agate mortar to ensure the uniformity of the pigment particle size. Five commonly used mineral pigments, cinnabar, realgar, orpiment, malachite, lapis lazuli samples (such as Figure 3 ).

[0026] Step 2: Prepare Wolfberry Root Extract The roots of wolfsbane are crushed, soaked in ethanol, evaporated and concentrated, and then desugared and further concentrated to obtain a wolfsbane root extract. The method comprises crushing the roots of wolfsbane, soaking the wolfsbane in ethanol for 5 to 10 days, wherein the mass ratio of the crushed wolfsbane roots to ethanol is 1:10 to 30, evaporating 1 / 12 to 1 / 8 of the volume of ethanol during evaporation and concentration, cooling and desugaring for 2 to 4 days, and then continuing to concentrate to obtain the wolfsbane root extract. The mass ratio of wolfsbane roots to ethanol in the wolfsbane root extract is 1:0.8 to 3.75.

[0027] Step 3: Prepare wolfsbane pigment 1. Dissolve the prepared wolfsbane root extract and ethanol in a mass ratio of 1:20-25 by stirring to form a wolfsbane extract (such as Figure 3 b); 2. Then, mix the mineral pigments (cinnabar, realgar, orpiment, malachite, lapis lazuli) and wolfsbane extract in a mass ratio of 1:1 to 5; 3. Let the prepared wolfsbane mineral pigment stand for 20 to 30 hours to dry naturally into powder.

[0028] It should be noted that while wolfsbane is a toxic plant, this toxicity is relative. Wolfsbane is a traditional Chinese medicine used not only in pharmaceuticals but also clinically to treat skin diseases, lung cancer, and other conditions. The median lethal dose (LD50) of wolfsbane root ethanol extract is 2080 mg / kg•bw, making it less toxic than nano-CuO (LD50: 200 mg / kg•bw) and nano-ZnO (LD50: 1656.91 mg / kg•bw). These data are based on available oral toxicity data.

[0029] Example 1: The present invention provides a method for preparing an anti-ultraviolet wolfberry mineral pigment, comprising the following steps: Step 1: Prepare the raw mineral pigments The primary processed powdered realgar pigment is used as the basis, and then the realgar pigment is secondary ground and filtered through an agate mortar to ensure the uniformity of the pigment particle size.

[0030] Step 2: Prepare Wolfberry Root Extract The roots of wolfsbane are crushed, soaked in ethanol, evaporated and concentrated, and then desugared and concentrated to obtain a wolfsbane root extract, which includes crushing the roots of wolfsbane and then soaking the wolfsbane in ethanol for 8 days, wherein the mass ratio of the crushed wolfsbane roots to ethanol is 1:20, 1 / 10 volume of ethanol is evaporated during evaporation and concentration, and the wolfsbane root extract is obtained after cooling and desugaring for 3 days and then concentrated. The mass ratio of wolfsbane roots to ethanol in the wolfsbane root extract is 1:2.

[0031] Step 3: Prepare wolfsbane pigment 1. Dissolve the prepared wolfsbane root extract and ethanol in a mass ratio of 1:22 by stirring to form a wolfsbane extract; 2. Then, mix the mineral pigment (realgar) and the wolfberry extract in a mass ratio of 1:3; 3. Let the prepared wolfsbane mineral pigment stand for 24 hours to dry naturally and form powder.

[0032] The root extract of wolfsbane prepared in the second step was tested by UV-visible spectrophotometer. The test results were as follows: Figure 2 As shown by Figure 2 It can be seen that the wolfberry root extract prepared in step 2 has a strong absorption capacity in the range of 200-400 nanometers, and has a stronger absorption capacity in the UVB band.

[0033] Example 2: The present invention provides a method for preparing an anti-ultraviolet wolfberry mineral pigment, comprising the following steps: Step 1: Prepare the raw mineral pigments The primary processed powdered realgar pigment is used as the basis, and then the realgar pigment is secondary ground and filtered through an agate mortar to ensure the uniformity of the pigment particle size.

[0034] Step 2: Prepare Wolfberry Root Extract The roots of wolfsbane are crushed, soaked in ethanol, evaporated and concentrated, and then desugared and concentrated to obtain a wolfsbane root extract, which includes crushing the roots of wolfsbane and then soaking the wolfsbane in ethanol for 5 days, wherein the mass ratio of the crushed wolfsbane roots to ethanol is 1:10, 1 / 12 of the volume of ethanol is evaporated during evaporation and concentration, and the wolfsbane root extract is obtained after cooling and desugaring for 2 days. The mass ratio of wolfsbane roots to ethanol in the wolfsbane root extract is 1:3.75.

[0035] Step 3: Prepare wolfsbane pigment 1. Dissolve the prepared wolfsbane root extract and ethanol in a mass ratio of 1:20 by stirring to form a wolfsbane extract; 2. Then, mix the mineral pigment (realgar) and the wolfberry extract in a mass ratio of 1:1; 3. Let the prepared wolfsbane mineral pigment stand for 20 hours to dry naturally into powder.

[0036] Example 3: The present invention provides a method for preparing an anti-ultraviolet wolfberry mineral pigment, comprising the following steps: Step 1: Prepare the raw mineral pigments The primary processed powdered realgar pigment is used as the basis, and then the realgar pigment is secondary ground and filtered through an agate mortar to ensure the uniformity of the pigment particle size.

[0037] Step 2: Prepare Wolfberry Root Extract The roots of wolfsbane are crushed, soaked in ethanol, evaporated and concentrated, and then desugared and concentrated to obtain a wolfsbane root extract, which includes crushing the roots of wolfsbane and then soaking the wolfsbane in ethanol for 10 days, wherein the mass ratio of the crushed wolfsbane roots to ethanol is 1:10, 1 / 8 of the volume of ethanol is evaporated during evaporation and concentration, and the wolfsbane root extract is obtained after cooling and desugaring for 4 days and then concentrated. The mass ratio of wolfsbane roots to ethanol in the wolfsbane root extract is 1:0.8.

[0038] Step 3: Prepare wolfsbane pigment 1. Dissolve the prepared wolfsbane root extract and ethanol in a mass ratio of 1:25 by stirring to form a wolfsbane extract; 2. Then, mix the mineral pigment (realgar) and the wolfberry extract in a mass ratio of 1:5; 3. Let the prepared wolfsbane mineral pigment stand for 30 hours to dry naturally and form powder.

[0039] Example 4: This embodiment of the present invention provides a method for preparing an anti-ultraviolet wolfberry mineral pigment. The difference from Example 1 is that in the third step, the mass ratio of the mineral pigment (realgar) to the wolfberry extract is 3:1.

[0040] Example 5: This embodiment of the present invention provides a method for preparing an anti-ultraviolet wolfberry mineral pigment. The difference from Example 1 is that in the third step, the mass ratio of the mineral pigment (realgar) to the wolfberry extract is 5:1.

[0041] Comparative Example 1: A method for preparing a mineral pigment is provided. The difference from Example 1 is that only mineral realgar is used and no wolfsbane extract is added.

[0042] Example 6: The present invention provides a method for preparing an anti-ultraviolet wolfberry mineral pigment, comprising the following steps: Step 1: Prepare the raw mineral pigments The cinnabar pigment is based on the primary processed powdered pigment, and then it is ground and filtered for the second time through an agate mortar to ensure the uniformity of the pigment particle size.

[0043] Step 2: Prepare Wolfberry Root Extract The roots of wolfsbane are crushed, soaked in ethanol, evaporated and concentrated, and then desugared and concentrated to obtain a wolfsbane root extract, which includes crushing the roots of wolfsbane and then soaking the wolfsbane in ethanol for 8 days, wherein the mass ratio of the crushed wolfsbane roots to ethanol is 1:20, 1 / 10 volume of ethanol is evaporated during evaporation and concentration, and the wolfsbane root extract is obtained after cooling and desugaring for 3 days and then concentrated. The mass ratio of wolfsbane roots to ethanol in the wolfsbane root extract is 1:2.

[0044] Step 3: Prepare wolfsbane pigment 1. Dissolve the prepared wolfsbane root extract and ethanol in a mass ratio of 1:22 by stirring to form a wolfsbane extract; 2. Then, mix the mineral pigment (cinnabar) and the wolfberry extract in a mass ratio of 1:3; 3. Let the prepared wolfsbane mineral pigment stand for 24 hours to dry naturally and form powder.

[0045] Example 7: The present invention provides a method for preparing an anti-ultraviolet wolfberry mineral pigment, comprising the following steps: Step 1: Prepare the raw mineral pigments The cinnabar pigment is based on the primary processed powdered pigment, and then it is ground and filtered for the second time through an agate mortar to ensure the uniformity of the pigment particle size.

[0046] Step 2: Prepare Wolfberry Root Extract The roots of wolfsbane are crushed, soaked in ethanol, evaporated and concentrated, and then desugared and concentrated to obtain a wolfsbane root extract, which includes crushing the roots of wolfsbane and then soaking the wolfsbane in ethanol for 5 days, wherein the mass ratio of the crushed wolfsbane roots to ethanol is 1:10, 1 / 12 of the volume of ethanol is evaporated during evaporation and concentration, and the wolfsbane root extract is obtained after cooling and desugaring for 2 days. The mass ratio of wolfsbane roots to ethanol in the wolfsbane root extract is 1:3.75.

[0047] Step 3: Prepare wolfsbane pigment 1. Dissolve the prepared wolfsbane root extract and ethanol in a mass ratio of 1:20 by stirring to form a wolfsbane extract; 2. Then, mix the mineral pigment (cinnabar) and the wolfberry extract in a mass ratio of 1:1; 3. Let the prepared wolfsbane mineral pigment stand for 20 hours to dry naturally into powder.

[0048] Example 8: This embodiment of the present invention provides a method for preparing an anti-ultraviolet wolfberry mineral pigment, comprising the following: Step 1: Prepare the raw mineral pigments The cinnabar pigment is based on the primary processed powdered pigment, and then it is ground and filtered for the second time through an agate mortar to ensure the uniformity of the pigment particle size.

[0049] Step 2: Prepare Wolfberry Root Extract The roots of wolfsbane are crushed, soaked in ethanol, evaporated and concentrated, and then desugared and concentrated to obtain a wolfsbane root extract, which includes crushing the roots of wolfsbane and then soaking the wolfsbane in ethanol for 10 days, wherein the mass ratio of the crushed wolfsbane roots to ethanol is 1:10, 1 / 8 of the volume of ethanol is evaporated during evaporation and concentration, and the wolfsbane root extract is obtained after cooling and desugaring for 4 days and then concentrated. The mass ratio of wolfsbane roots to ethanol in the wolfsbane root extract is 1:0.8.

[0050] Step 3: Prepare wolfsbane pigment 1. Dissolve the prepared wolfsbane root extract and ethanol in a mass ratio of 1:25 by stirring to form a wolfsbane extract; 2. Then, mix the mineral pigment (cinnabar) and the wolfberry extract in a mass ratio of 1:5; 3. Let the prepared wolfsbane mineral pigment stand for 30 hours to dry naturally and form powder.

[0051] Example 9: This embodiment of the present invention provides a method for preparing an anti-ultraviolet wolfberry mineral pigment. The difference from Example 6 is that in the third step, the mass ratio of the mineral pigment (cinnabar) to the wolfberry extract is 3:1.

[0052] Example 10: This embodiment of the present invention provides a method for preparing an anti-ultraviolet wolfberry mineral pigment. The difference from Example 6 is that in the third step, the mass ratio of the mineral pigment (cinnabar) to the wolfberry extract is 5:1.

[0053] Comparative Example 2: A method for preparing a mineral pigment is provided. The difference from Example 1 is that only mineral cinnabar is used and no wolfsbane extract is added.

[0054] Example 11: This embodiment of the present invention provides a method for preparing an anti-ultraviolet wolfberry mineral pigment, comprising the following steps: Step 1: Prepare the raw mineral pigments The orpiment pigment is made from powdered orpiment pigment that has been processed initially, and then it is ground and filtered for the second time through an agate mortar to ensure the uniformity of the pigment particle size.

[0055] Step 2: Prepare Wolfberry Root Extract The roots of wolfsbane are crushed, soaked in ethanol, evaporated and concentrated, and then desugared and concentrated to obtain a wolfsbane root extract, which includes crushing the roots of wolfsbane and then soaking the wolfsbane in ethanol for 8 days, wherein the mass ratio of the crushed wolfsbane roots to ethanol is 1:20, 1 / 10 volume of ethanol is evaporated during evaporation and concentration, and the wolfsbane root extract is obtained after cooling and desugaring for 3 days and then concentrated. The mass ratio of wolfsbane roots to ethanol in the wolfsbane root extract is 1:2.

[0056] Step 3: Prepare wolfsbane pigment 1. Dissolve the prepared wolfsbane root extract and ethanol in a mass ratio of 1:22 by stirring to form a wolfsbane extract; 2. Then, mix the mineral pigment (orpiment) and the wolfberry extract in a mass ratio of 1:3; 3. Let the prepared wolfsbane mineral pigment stand for 24 hours to dry naturally and form powder.

[0057] Example 12: This embodiment of the present invention provides a method for preparing an anti-ultraviolet wolfberry mineral pigment, comprising the following: Step 1: Prepare the raw mineral pigments The orpiment pigment is made from powdered orpiment pigment that has been processed initially, and then it is ground and filtered for the second time through an agate mortar to ensure the uniformity of the pigment particle size.

[0058] Step 2: Prepare Wolfberry Root Extract The roots of wolfsbane are crushed, soaked in ethanol, evaporated and concentrated, and then desugared and concentrated to obtain a wolfsbane root extract, which includes crushing the roots of wolfsbane and then soaking the wolfsbane in ethanol for 5 days, wherein the mass ratio of the crushed wolfsbane roots to ethanol is 1:10, 1 / 12 of the volume of ethanol is evaporated during evaporation and concentration, and the wolfsbane root extract is obtained after cooling and desugaring for 2 days. The mass ratio of wolfsbane roots to ethanol in the wolfsbane root extract is 1:3.75.

[0059] Step 3: Prepare wolfsbane pigment 1. Dissolve the prepared wolfsbane root extract and ethanol in a mass ratio of 1:20 by stirring to form a wolfsbane extract; 2. Then, mix the mineral pigment (orpiment) and the wolfberry extract in a mass ratio of 1:1; 3. Let the prepared wolfsbane mineral pigment stand for 20 hours to dry naturally into powder.

[0060] Example 13: The present invention provides a method for preparing an anti-ultraviolet wolfberry mineral pigment, comprising the following steps: Step 1: Prepare the raw mineral pigments The orpiment pigment is made from powdered orpiment pigment that has been processed initially, and then it is ground and filtered for the second time through an agate mortar to ensure the uniformity of the pigment particle size.

[0061] Step 2: Prepare Wolfberry Root Extract The roots of wolfsbane are crushed, soaked in ethanol, evaporated and concentrated, and then desugared and concentrated to obtain a wolfsbane root extract, which includes crushing the roots of wolfsbane, soaking the wolfsbane in ethanol for 10 days, wherein the mass ratio of the crushed wolfsbane roots to ethanol is 1:10, evaporating 1 / 8 of the volume of ethanol during evaporation and concentration, cooling and desugaring for 4 days, and then continuing to concentrate (supplementing the remaining ethanol volume after the second concentration), thereby obtaining the wolfsbane root extract.

[0062] Step 3: Prepare wolfsbane pigment 1. Dissolve the prepared wolfsbane root extract and ethanol in a mass ratio of 1:25 by stirring to form a wolfsbane extract; 2. Then, mix the mineral pigment (orpiment) and the wolfberry extract in a mass ratio of 1:5; 3. Let the prepared wolfsbane mineral pigment stand for 30 hours to dry naturally and form powder.

[0063] Example 14: This embodiment of the present invention provides a method for preparing an anti-ultraviolet wolfberry mineral pigment. The difference from Example 11 is that in the third step, the mass ratio of the mineral pigment (orpiment) to the wolfberry extract is 3:1.

[0064] Example 15: This embodiment of the present invention provides a method for preparing an anti-ultraviolet wolfberry mineral pigment. The difference from Example 6 is that in the third step, the mass ratio of the mineral pigment (orpiment) to the wolfberry extract is 5:1.

[0065] Comparative Example 3: A method for preparing a mineral pigment is provided. The difference from Example 11 is that only mineral orpiment is used and no wolfsbane extract is added.

[0066] Example 16: The present invention provides a method for preparing an anti-ultraviolet wolfberry mineral pigment, comprising the following steps: Step 1: Prepare the raw mineral pigments Using the primary processed powdered lapis lazuli pigment as the basis, the lapis lazuli pigment is then ground and filtered for the second time through an agate mortar to ensure the uniformity of the pigment particle size.

[0067] Step 2: Prepare Wolfberry Root Extract The roots of wolfsbane are crushed, soaked in ethanol, evaporated and concentrated, and then desugared and concentrated to obtain a wolfsbane root extract, which includes crushing the roots of wolfsbane and then soaking the wolfsbane in ethanol for 8 days, wherein the mass ratio of the crushed wolfsbane roots to ethanol is 1:20, 1 / 10 volume of ethanol is evaporated during evaporation and concentration, and the wolfsbane root extract is obtained after cooling and desugaring for 3 days and then concentrated. The mass ratio of wolfsbane roots to ethanol in the wolfsbane root extract is 1:2.

[0068] Step 3: Prepare wolfsbane pigment 1. Dissolve the prepared wolfsbane root extract and ethanol in a mass ratio of 1:22 by stirring to form a wolfsbane extract; 2. Then, mix the mineral pigment (lapis lazuli) and wolfsbane extract in a mass ratio of 1:3; 3. Let the prepared wolfsbane mineral pigment stand for 24 hours to dry naturally and form powder.

[0069] Example 17: This embodiment of the present invention provides a method for preparing an anti-ultraviolet wolfberry mineral pigment, comprising the following steps: Step 1: Prepare the raw mineral pigments Using the primary processed powdered lapis lazuli pigment as the basis, the lapis lazuli pigment is then ground and filtered for the second time through an agate mortar to ensure the uniformity of the pigment particle size.

[0070] Step 2: Prepare Wolfberry Root Extract The roots of wolfsbane are crushed, soaked in ethanol, evaporated and concentrated, and then desugared and concentrated to obtain a wolfsbane root extract, which includes crushing the roots of wolfsbane and then soaking the wolfsbane in ethanol for 5 days, wherein the mass ratio of the crushed wolfsbane roots to ethanol is 1:10, 1 / 12 of the volume of ethanol is evaporated during evaporation and concentration, and the wolfsbane root extract is obtained after cooling and desugaring for 2 days. The mass ratio of wolfsbane roots to ethanol in the wolfsbane root extract is 1:3.75.

[0071] Step 3: Prepare wolfsbane pigment 1. Dissolve the prepared wolfsbane root extract and ethanol in a mass ratio of 1:20 by stirring to form a wolfsbane extract; 2. Then, mix the mineral pigment (lapis lazuli) and wolfsbane extract in a mass ratio of 1:1; 3. Let the prepared wolfsbane mineral pigment stand for 20 hours to dry naturally into powder.

[0072] Example 18: This embodiment of the present invention provides a method for preparing an anti-ultraviolet wolfberry mineral pigment, comprising the following steps: Step 1: Prepare the raw mineral pigments Using the primary processed powdered lapis lazuli pigment as the basis, the lapis lazuli pigment is then ground and filtered for the second time through an agate mortar to ensure the uniformity of the pigment particle size.

[0073] Step 2: Prepare Wolfberry Root Extract The roots of wolfsbane are crushed, soaked in ethanol, evaporated and concentrated, and then desugared and concentrated to obtain a wolfsbane root extract, which includes crushing the roots of wolfsbane, soaking the wolfsbane in ethanol for 10 days, wherein the mass ratio of the crushed wolfsbane roots to ethanol is 1:10, evaporating 1 / 8 of the volume of ethanol during evaporation and concentration, cooling and desugaring for 4 days, and then continuing to concentrate (supplementing the remaining ethanol volume after the second concentration), thereby obtaining the wolfsbane root extract.

[0074] Step 3: Prepare wolfsbane pigment 1. Dissolve the prepared wolfsbane root extract and ethanol in a mass ratio of 1:25 by stirring to form a wolfsbane extract; 2. Then, mix the mineral pigment (lapis lazuli) and wolfsbane extract in a mass ratio of 1:5; 3. Let the prepared wolfsbane mineral pigment stand for 30 hours to dry naturally and form powder.

[0075] Example 19: This embodiment of the present invention provides a method for preparing an anti-ultraviolet wolfsbane mineral pigment. The difference from Example 16 is that in the third step, the mass ratio of the mineral pigment (lapis lazuli) to the wolfsbane extract is 3:1.

[0076] Example 20: This embodiment of the present invention provides a method for preparing an anti-ultraviolet wolfsbane mineral pigment. The difference from Example 16 is that in the third step, the mass ratio of the mineral pigment (lapis lazuli) to the wolfsbane extract is 5:1.

[0077] Comparative Example 4: A method for preparing a mineral pigment is provided. The difference from Example 16 is that only lapis lazuli is used and no wolfsbane extract is added.

[0078] Example 21: This embodiment of the present invention provides a method for preparing an anti-ultraviolet wolfberry mineral pigment, comprising the following steps: Step 1: Prepare the raw mineral pigments The primary processed powdered malachite pigment is used as the basis, and then the malachite pigment is secondary ground and filtered through an agate mortar to ensure the uniformity of the pigment particle size.

[0079] Step 2: Prepare Wolfberry Root Extract The roots of wolfsbane are crushed, soaked in ethanol, evaporated and concentrated, and then desugared and concentrated to obtain a wolfsbane root extract, which includes crushing the roots of wolfsbane and then soaking the wolfsbane in ethanol for 8 days, wherein the mass ratio of the crushed wolfsbane roots to ethanol is 1:20, 1 / 10 volume of ethanol is evaporated during evaporation and concentration, and the wolfsbane root extract is obtained after cooling and desugaring for 3 days and then concentrated. The mass ratio of wolfsbane roots to ethanol in the wolfsbane root extract is 1:2.

[0080] Step 3: Prepare wolfsbane pigment 1. Dissolve the prepared wolfsbane root extract and ethanol in a mass ratio of 1:22 by stirring to form a wolfsbane extract; 2. Then, mix the mineral pigment (malachite green) and the wolfsbane extract in a mass ratio of 1:3; 3. Let the prepared wolfsbane mineral pigment stand for 24 hours to dry naturally and form powder.

[0081] Example 22: The present invention provides a method for preparing an anti-ultraviolet wolfberry mineral pigment, comprising the following steps: Step 1: Prepare the raw mineral pigments The primary processed powdered malachite pigment is used as the basis, and then the malachite pigment is secondary ground and filtered through an agate mortar to ensure the uniformity of the pigment particle size.

[0082] Step 2: Prepare Wolfberry Root Extract The roots of wolfsbane are crushed, soaked in ethanol, evaporated and concentrated, and then desugared and concentrated to obtain a wolfsbane root extract, which includes crushing the roots of wolfsbane and then soaking the wolfsbane in ethanol for 5 days, wherein the mass ratio of the crushed wolfsbane roots to ethanol is 1:10, 1 / 12 of the volume of ethanol is evaporated during evaporation and concentration, and the wolfsbane root extract is obtained after cooling and desugaring for 2 days. The mass ratio of wolfsbane roots to ethanol in the wolfsbane root extract is 1:3.75.

[0083] Step 3: Prepare wolfsbane pigment 1. Dissolve the prepared wolfsbane root extract and ethanol in a mass ratio of 1:20 by stirring to form a wolfsbane extract; 2. Then, mix the mineral pigment (malachite green) and the wolfberry extract in a mass ratio of 1:1; 3. Let the prepared wolfsbane mineral pigment stand for 20 hours to dry naturally into powder.

[0084] Example 23: The present invention provides a method for preparing an anti-ultraviolet wolfberry mineral pigment, comprising the following steps: Step 1: Prepare the raw mineral pigments The primary processed powdered malachite pigment is used as the basis, and then the malachite pigment is secondary ground and filtered through an agate mortar to ensure the uniformity of the pigment particle size.

[0085] Step 2: Prepare Wolfberry Root Extract The roots of wolfsbane are crushed, soaked in ethanol, evaporated and concentrated, and then desugared and concentrated to obtain a wolfsbane root extract, which includes crushing the roots of wolfsbane, soaking the wolfsbane in ethanol for 10 days, wherein the mass ratio of the crushed wolfsbane roots to ethanol is 1:10, evaporating 1 / 8 of the volume of ethanol during evaporation and concentration, cooling and desugaring for 4 days, and then continuing to concentrate (supplementing the remaining ethanol volume after the second concentration), thereby obtaining the wolfsbane root extract.

[0086] Step 3: Prepare wolfsbane pigment 1. Dissolve the prepared wolfsbane root extract and ethanol in a mass ratio of 1:25 by stirring to form a wolfsbane extract; 2. Then, mix the mineral pigment (malachite green) and the wolfsbane extract in a mass ratio of 1:5; 3. Let the prepared wolfsbane mineral pigment stand for 30 hours to dry naturally and form powder.

[0087] Example 24: This embodiment of the present invention provides a method for preparing an anti-ultraviolet wolfsbane mineral pigment. The difference from Example 21 is that in the third step, the mass ratio of the mineral pigment (malachite green) to the wolfsbane extract is 3:1.

[0088] Example 25: This embodiment of the present invention provides a method for preparing an anti-ultraviolet wolfsbane mineral pigment. The difference from Example 21 is that in the third step, the mass ratio of the mineral pigment (malachite green) to the wolfsbane extract is 5:1.

[0089] Comparative Example 5: A method for preparing a mineral pigment is provided. The difference from Example 21 is that only mineral malachite is used and no wolfsbane extract is added.

[0090] Test and detection: 1. Accelerated light aging test: Instruments used: The CEL-HXF300-T3 xenon lamp light source system is used for daylight simulation. The xenon lamp light source is stable, and the spectrum emitted by the xenon lamp light source system is very close to the complete solar spectrum including ultraviolet (UV), visible light and infrared (IR).

[0091] Aging test related parameters: The irradiance was set to 16.6W in the visible light region, the filter in the optical path steering device was between 350nm and 780nm, the aging temperature was 40℃, the relative humidity was maintained at around 25%, the vertical distance between the sample and the light source was 47cm, and the light intensity was 1100W / m 2 .

[0092] Test results: Taking Example 1 (orange realgar) as an example, Figure 4 and Figure 5 As shown, a simulated sunlight aging experiment was also conducted, with a cumulative irradiation time of 72 hours, or a total of 7 days. A 3nh colorimeter was used to measure the Lab values ​​of realgar (Comparative Example 1) before and after aging and before and after the addition of wolfsbane (Example 1), and the ΔE, ΔL, Δa, and Δb values ​​were calculated. The degree of color change of the samples was determined according to relevant standards to understand the degree of fading of the painted wood components. The results are shown in Table 1 below, which shows that the addition of wolfsbane pigment significantly improves the anti-aging and color fixation capabilities.

[0093] Table 1

[0094] Reflectivity test: After 120 hours of aging test of wolfsbane mineral pigment and original mineral pigment, the UV-visible reflectance spectra of realgar before and after aging and before and after adding wolfsbane were tested by spectrometer. The results are as follows: Figure 6 As shown, it can be concluded that the reflectance of wolfsbane mineral pigment is lower than that of original mineral pigment before and after aging, and after 120 hours of aging, the reflectance change before and after aging is more stable in wolfsbane mineral pigment.

[0095] The UV-visible reflectance spectra of the pigments prepared in Examples 1 to 25 and Comparative Examples 1 to 5 are as follows: Figure 7 As shown by Figure 7 It can be seen that the absorption of ultraviolet light by raw cinnabar, realgar and orpiment is relatively small ( Figure 7 a. Figure 7 b. Figure 7 c), while the original lapis lazuli and malachite have higher absorption of ultraviolet light ( Figure 7 d. Figure 7 e). With the increase of the content of wolfsbane extract, the concentration of wolfsbane extract in the pigment increases, the pigment's absorption of ultraviolet rays is improved, and the anti-ultraviolet effect of cinnabar, realgar and orpiment is more obvious. Figure 7, wolfsbane extract can reduce the ultraviolet reflectance of original cinnabar, realgar and orpiment by more than 24%, 10% and 16% respectively. Taking into account the small actual amount of wolfsbane extract used, it is easy to cause the extract to reduce the wetting effect on the pigment, or excessive extract affects the chromaticity of the color itself. Therefore, in order to ensure the extraction effect, a mass ratio of 1:1~5 is selected as the optimization parameter. The above is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention can have various changes and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention. It should be noted that the structures or components illustrated in the accompanying drawings are not necessarily drawn to scale. At the same time, the present invention omits the description of known components and processing technologies and processes to avoid unnecessary limitations on the present invention.

Claims

1. An anti-ultraviolet wolfberry mineral pigment, characterized in that: The invention comprises mineral pigments and wolfsbane extract, which is obtained from the root of wolfsbane.

2. The UV-resistant wolfsbane mineral pigment according to claim 1, characterized in that: The mineral pigment includes one of cinnabar, realgar, orpiment, malachite and lapis lazuli.

3. The UV-resistant wolfsbane mineral pigment according to claim 2, characterized in that: The wolfsbane extract can absorb ultraviolet rays.

4. A method for preparing the UV-resistant wolfsbane mineral pigment according to any one of claims 1 to 3, characterized in that: The following steps are involved: S1: Grind the mineral pigment into powder; S2: sequentially preparing the extract of wolfsbane root and powdered mineral pigment, and drying them to obtain wolfsbane mineral pigment.

5. The method for preparing an anti-ultraviolet wolfberry mineral pigment according to claim 4, wherein: The wolfsbane root extract is obtained by dissolving a crude wolfsbane root extract in ethanol; The wolfsbane root crude extract is obtained by crushing the wolfsbane root, soaking it in ethanol, and then sequentially performing concentration and evaporation, cooling and desugaring, and further concentration.

6. The method for preparing an anti-ultraviolet wolfberry mineral pigment according to claim 5, characterized in that: During the soaking process, the mass ratio of wolfsbane roots to ethanol is 1:10~30, the soaking time is 5~10 days, and the cooling and desugaring time is 2~4 days.

7. The method for preparing an anti-ultraviolet wolfberry mineral pigment according to claim 5, characterized in that: During the concentration and evaporation process, 1 / 12 to 1 / 8 of the volume of ethanol is evaporated, and the mass ratio of the wolfsbane root to the ethanol in the wolfsbane root crude extract is 1:0.8 to 3.

75.

8. The method for preparing an anti-ultraviolet wolfberry mineral pigment according to claim 7, characterized in that: In the process of dissolving the crude extract of wolfsbane root to prepare the wolfsbane root extract, the mass ratio of the crude extract of wolfsbane root to ethanol is 1:20-25.

9. The method for preparing an anti-ultraviolet wolfberry mineral pigment according to claim 8, characterized in that: The mass ratio of the mineral pigment to the root extract of wolfsbane in S2 is 1:1~5.

10. The method for preparing an anti-ultraviolet wolfberry mineral pigment according to claim 4, characterized in that: The drying method described in S2 includes naturally drying the powder within 20 to 30 hours.

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