阅读说明：本技术 一种美术颜料及其制备方法 (Art pigment and preparation method thereof ) 是由 包春燕 肖琴 马雪松 于 2020-06-15 设计创作，主要内容包括：本发明公开一种美术颜料,其是由以下重量份配比的原料制成：瓜尔胶20～40份、蒸馏水10～20份、天然色素15～23份、甲基丙烯酸甲酯3～10份、叔丁基对苯二酚5～8份、聚乙二醇4～8份、钛白粉1～5份、滑石粉3～7份、丙烯酸乳胶7～12份、防沉降剂2～6份、表面活性剂2～6份。本发明采用合理配方制得美术颜料,该美术颜料性能优异,不但具有较好的耐光性、耐热性、耐候性、着色力和分散性等,而且品质细腻、色彩鲜艳、色泽鲜明、化学性质稳定、附着力强。(The invention discloses an art pigment which is prepared from the following raw materials in parts by weight: 20-40 parts of guar gum, 10-20 parts of distilled water, 15-23 parts of natural pigment, 3-10 parts of methyl methacrylate, 5-8 parts of tert-butyl hydroquinone, 4-8 parts of polyethylene glycol, 1-5 parts of titanium dioxide, 3-7 parts of talcum powder, 7-12 parts of acrylic latex, 2-6 parts of anti-settling agent and 2-6 parts of surfactant. The art pigment prepared by adopting a reasonable formula has excellent performance, good light resistance, heat resistance, weather resistance, tinting strength, dispersibility and the like, and has fine and smooth quality, bright color, stable chemical property and strong adhesive force.)

1. An art pigment is characterized by being prepared from the following raw materials in parts by weight: 20-40 parts of guar gum, 10-20 parts of distilled water, 15-23 parts of natural pigment, 3-10 parts of methyl methacrylate, 5-8 parts of tert-butyl hydroquinone, 4-8 parts of polyethylene glycol, 1-5 parts of titanium dioxide, 3-7 parts of talcum powder, 7-12 parts of acrylic latex, 2-6 parts of anti-settling agent and 2-6 parts of surfactant.

2. An art paint as claimed in claim 1, wherein: the anti-settling agent is selected from one of nonionic polyoxyethylene fatty alcohol ether, fatty alcohol-polyoxyethylene ether sodium sulfate and polyethylene glycol octadecanol ether.

3. An art paint as claimed in claim 1, wherein: the surfactant is sodium polyacrylate.

4. An art paint as claimed in claim 1, wherein: the natural pigment is selected from one of grape skin pigment, licorice pigment, chrysanthemum yellow pigment, safflower red pigment, purple cabbage pigment, black sesame pigment, lycopene, natural carotene, mixed carotenoid, corn yellow, annatto pigment, gardenia yellow pigment, gardenia green pigment, capsicum red pigment and pimento red pigment.

5. A process for producing an art pigment as claimed in any one of claims 1 to 4, which comprises the steps of:

(1) weighing the raw materials according to the weight part ratio, firstly putting the guar gum into distilled water for heating at the temperature of 80-85 ℃ for 30-60 min, stirring while heating for dissolving, and controlling the stirring speed to be 350-400 r/min to prepare adhesive glue solution;

(2) adding methyl methacrylate, tert-butyl hydroquinone and polyethylene glycol into the adhesive glue solution prepared in the step (1), and uniformly stirring at the stirring speed of 350-400 r/min and the stirring temperature of 40-70 ℃ to prepare a colloid;

(3) adding acrylic latex into the colloid prepared in the step (2), and uniformly stirring at the stirring speed of 350-400 r/min and the stirring temperature of 40-70 ℃ to obtain a mixed colloid;

(4) placing the natural pigment into the mixed colloid prepared in the step (3), stirring for 30-40 min at the stirring temperature of 80-95 ℃ and the stirring speed of 200-300 r/min, sequentially adding titanium dioxide, talcum powder, anti-settling agent and surfactant, and continuously stirring for 40-60 min at the same stirring temperature and stirring speed to obtain a crude color slurry;

(5) and (4) adding the coarse color slurry prepared in the step (4) into a hopper of a three-roller grinding machine, grinding for 3-5 times by the three-roller grinding machine, cooling a roller by circulating water, and allowing the ground feed liquid to flow into a storage barrel to obtain a finished product.

6. A process for producing an art pigment according to claim 5, wherein: in the step (5), the temperature of the circulating water is 18-20 ℃.

Technical Field

The invention relates to the field of pigments, in particular to an art pigment and a preparation method thereof.

Background

The pigment is a substance capable of coloring an object, is a commonly used material in art painting, and has a plurality of types. Currently, common art pigments are divided into organic pigments and inorganic pigments. Inorganic pigments are low in cost, relatively good in heat resistance and relatively stable in color, but are limited in color and hue and not vivid. Compared with common inorganic pigments, organic pigments generally have higher tinting strength, are easy to grind and disperse, are not easy to precipitate, have brighter colors, but have poorer sun-proof, heat-resistant and weather-resistant properties.

The art pigment on the market at present takes chemical monomers as main raw materials, the using medium and the working condition of the art pigment are not fully considered in the formula design process, the quality of the art pigment is uneven, and the problems of dull painting color, poor saturation, lighter coloring and the like exist after the art pigment is scrawled on paper, so that the quality of the art pigment is directly influenced.

Disclosure of Invention

Based on the technical problems, the invention provides an art pigment and a preparation method thereof.

The technical solution adopted by the invention is as follows:

an art pigment is prepared from the following raw materials in parts by weight: 20-40 parts of guar gum, 10-20 parts of distilled water, 15-23 parts of natural pigment, 3-10 parts of methyl methacrylate, 5-8 parts of tert-butyl hydroquinone, 4-8 parts of polyethylene glycol, 1-5 parts of titanium dioxide, 3-7 parts of talcum powder, 7-12 parts of acrylic latex, 2-6 parts of anti-settling agent and 2-6 parts of surfactant.

Preferably, the anti-settling agent is selected from one of nonionic polyoxyethylene fatty alcohol ether, fatty alcohol-polyoxyethylene ether sodium sulfate and polyethylene glycol octadecanol ether.

Preferably, the surfactant is sodium polyacrylate.

Preferably, the natural pigment is selected from one of grape skin pigment, licorice pigment, chrysanthemum yellow pigment, safflower red pigment, purple cabbage pigment, black sesame pigment, lycopene, natural carotene, mixed carotenoid, corn yellow, annatto pigment, gardenia yellow pigment, gardenia green pigment, capsicum red pigment and pimento red pigment.

A preparation method of art pigment comprises the following steps:

(1) weighing the raw materials according to the weight part ratio, firstly putting the guar gum into distilled water for heating at the temperature of 80-85 ℃ for 30-60 min, stirring while heating for dissolving, and controlling the stirring speed to be 350-400 r/min to prepare adhesive glue solution;

(2) adding methyl methacrylate, tert-butyl hydroquinone and polyethylene glycol into the adhesive glue solution prepared in the step (1), and uniformly stirring at the stirring speed of 350-400 r/min and the stirring temperature of 40-70 ℃ to prepare a colloid;

(3) adding acrylic latex into the colloid prepared in the step (2), and uniformly stirring at the stirring speed of 350-400 r/min and the stirring temperature of 40-70 ℃ to obtain a mixed colloid;

(4) placing the natural pigment into the mixed colloid prepared in the step (3), stirring for 30-40 min at the stirring temperature of 80-95 ℃ and the stirring speed of 200-300 r/min, sequentially adding titanium dioxide, talcum powder, anti-settling agent and surfactant, and continuously stirring for 40-60 min at the same stirring temperature and stirring speed to obtain a crude color slurry;

(5) and (4) adding the coarse color slurry prepared in the step (4) into a hopper of a three-roller grinding machine, grinding for 3-5 times by the three-roller grinding machine, cooling a roller by circulating water, and allowing the ground feed liquid to flow into a storage barrel to obtain a finished product.

Preferably, in the step (5), the temperature of the circulating water is 18-20 ℃.

The beneficial technical effects of the invention are as follows:

the art pigment prepared by adopting a reasonable formula has excellent performance, good light resistance, heat resistance, weather resistance, tinting strength, dispersibility and the like, and has fine and smooth quality, bright color, stable chemical change and strong adhesive force.

According to the invention, guar gum and natural pigment are mixed, and the wetting property of the pigment can be maintained for a long time by adding methyl methacrylate and polyethylene glycol, so that the pigment is not easy to dry and block after being placed for a long time, and meanwhile, the antioxidant property of the pigment can be effectively improved by adding tert-butyl hydroquinone, so that the pigment can still maintain the original color under the severe sun exposure environment; the addition of titanium dioxide can lead the pigment to have bright color, high covering power, strong tinting strength and strong stability, and can enhance the adhesive force of the pigment and prevent cracks; the addition of the talcum powder can ensure that the pigment has uniform density, good glossiness and smooth surface; meanwhile, the acrylic latex is added, so that the adhesive force of the pigment can be remarkably improved, the pigment is firmly combined with an attachment, and the pigment is not easy to fall off when being contacted by external force; the anti-settling agent can prevent settling and color separation of natural pigment fine particles, so that the physical stability of the pigment is enhanced; the surfactant is adsorbed on the surface of the pigment micromolecules through intermolecular force to play a dispersing role, and the pigment micromolecules are prevented from being agglomerated in the long-term storage process.

The preparation method of the art pigment is also an important component for preparing the art pigment with excellent performance, and the method also has the advantages of simple operation, high production efficiency and the like.

Detailed Description

The present invention provides an art pigment and a preparation method thereof, and the present invention is further described in detail below in order to make the purpose, technical scheme and effect of the present invention clearer and clearer.