Colored lacquer and method for preparing the same

Abstract

The application discloses a kind of colour lacquer and its preparation method, including the following raw materials: natural lacquer, solvent, talcum powder, levelling agent, modified pigment, auxiliary agent;Its specific formula includes the following raw materials: natural lacquer 100-200 parts, solvent 20-30 parts, talcum powder 10-20 parts, levelling agent 5-10 parts, modified pigment 8-12 parts, auxiliary agent 3-5 parts;Colour lacquer of the application adds levelling agent and talcum powder in raw material, talcum powder has excellent lubricating dispersion stability, can prevent particle settlement, improve the stability of lacquer, the reflectivity of colorful pigment to sunlight is higher, so it can achieve heat insulation effect while showing a variety of color, at the same time, by modifying pigment, and adding sodium polyacrylate in the process of modification, there is repulsion effect between levelling agent, improve the dispersion uniformity of pigment in lacquer mixture, make pigment disperse uniformly in a short time, so as to improve the aesthetic effect of colour lacquer.

Description

Technical Field

[0001] This invention relates to the field of lacquer coating technology, specifically to a colored lacquer and its preparation method. Background Technology

[0002] Lacquer, also known as natural lacquer, raw lacquer, earth lacquer, or simply Chinese lacquer, is a natural resin coating. It is a white, viscous emulsion that flows from the phloem of the lacquer tree after the bark is cut, and is processed to produce a coating. Natural lacquer is a traditional Chinese natural biomass resin coating, and is currently the only known natural resin coating that can cure naturally under its own biological oxidative enzymes. It possesses excellent properties such as superior performance, no pollution, and being environmentally friendly and renewable. In recent years, this bio-coating has received widespread attention, and due to its excellent properties, it has been widely used in lacquer painting, furniture, and architectural crafts. Although natural lacquer has many advantages, traditional natural lacquer has drawbacks such as demanding film-forming conditions, dark color, and long production cycles, which limit its widespread application in daily life.

[0003] Because the existing lacquer film is constantly exposed to the environment, it begins to discolor and lose its gloss after a period of use. Moreover, since the pigments are not easy to disperse evenly in the lacquer, it is necessary to stir for a long time in order to achieve uniform pigment dispersion. The increase in stirring time affects production efficiency, while stirring for a short time can easily cause uneven dispersion of pigments in colored lacquer, which can easily affect the aesthetic effect of colored lacquer. Summary of the Invention

[0004] In view of the deficiencies of the prior art, the purpose of this invention is to provide a colored lacquer and its preparation method to solve the problems mentioned in the background art.

[0005] The present invention solves the technical problem by adopting the following technical solution:

[0006] This invention provides a colored lacquer, comprising the following raw materials:

[0007] Natural lacquer, solvents, talc, leveling agents, modified pigments, and additives;

[0008] Its specific formula includes the following raw materials: 100-200 parts of natural lacquer, 20-30 parts of solvent, 10-20 parts of talc, 5-10 parts of leveling agent, 8-12 parts of modified pigment, and 3-5 parts of additives.

[0009] Preferably, the colored lacquer comprises the following raw materials:

[0010] 160 parts natural lacquer, 25 parts solvent, 15 parts talc, 8 parts leveling agent, 10 parts modified pigment, and 4 parts additives.

[0011] Preferably, the leveling agent is a polyacrylate wetting leveling agent, and the mass percentage of the leveling agent in the colored lacquer is 1-2%.

[0012] Preferably, the auxiliary agent includes a defoaming agent, a dispersing agent, and a thickening agent, the defoaming agent is 10-20 parts, the dispersing agent is 20-25 parts, and the thickening agent is 10-15 parts, and the viscosity of the thickening agent is 30000-120000 mPa·s at a temperature of 20-30℃.

[0013] Preferably, the defoaming agent is a polyether-modified silicone defoaming agent, the dispersing agent is a polypropionic acid ester dispersing agent containing a pigment affinity group, and the thickening agent is hydroxyethyl cellulose or an associated polyurethane thickening agent.

[0014] Preferably, the modified pigment is prepared by the following steps:

[0015] S1, calcining inorganic pigments by a calcination method to obtain inorganic pigment crude products, and crushing and dry grinding the inorganic pigment crude products to obtain inorganic pigment particles;

[0016] S2, inorganic pigment particles and sodium polyacrylate solution are weighed according to a weight ratio of 5:2-3, mixed, dispersed by a dispersing machine, heated and reacted to form a mixture A;

[0017] S3, the obtained mixture A is added into an octadecyl trimethyl ammonium chloride solution, the pH value is adjusted to 5.5 by nitric acid, then nitrogen protection is performed, the temperature is increased to 50℃, and oscillation reaction is performed for 12 hours, and then vacuum drying is performed at 45℃ for 24 hours, grinding is performed, and then the mixture is sieved through an 80-100 mesh sieve to obtain ultra-fine modified pigments.

[0018] Preferably, the inorganic pigment is mixed by one or more of iron oxide red, iron oxide yellow, phthalocyanine blue, cobalt blue, phthalocyanine green, titanium chrome yellow, phthalocyanine blue, and iron chrome black.

[0019] Preferably, the calcination method adopts electric furnace heating, the inorganic pigment particles are placed into a sintering furnace, the temperature is increased to 600℃ within 30 minutes, the calcination temperature is 600-800℃, the calcination time is 30-50 minutes, and then the temperature is decreased to room temperature.

[0020] The application also provides a colored lacquer and a preparation method thereof, including the following steps:

[0021] Step one, talc is weighed according to weight parts, crushed and dry ground, and then dried to control the water content of talc powder to be 10-20%, wherein the drying temperature of the talc powder is 50-65℃, and the drying time is 1-2 hours.

[0022] Step two, lacquer, talc powder, and leveling agent are added into a grinding machine, ground to 20-25 microns, and then added into a stirring machine for mixing.

[0023] Step three, the blender is stirred at 300-500 rpm, and then the modified pigment and additives are added in batches, and then stirred at a speed of 800 rpm or more for 20 minutes, until completely dissolved;

[0024] Step four, adjust the blender to 200-300 rpm, add solvent and mix for 10-12 hours, then pass through a 50 mesh sieve to obtain colored lacquer.

[0025] Preferably, the heating temperature in step three is 50-65℃, and the modified pigment and additives are added while stirring, and the stirring is stopped after heating to complete dissolution.

[0026] The colored lacquer prepared by the method has the following beneficial effects:

[0027] The colored lacquer of the present application adds leveling agent and talc powder to the raw materials. The talc powder has excellent lubricating and dispersing stability, can prevent particle settling, and improves the stability of the lacquer. The colored pigment has high reflectivity to sunlight, so it can achieve heat insulation effect while showing a variety of colors, expanding the application range of colored lacquer. At the same time, the pigment is modified, and sodium polyacrylate is added during the modification process, which has a repelling effect with the leveling agent, improving the uniformity of the pigment in the lacquer mixture, making the pigment disperse uniformly in a short time, thereby improving the aesthetic effect of the colored lacquer. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be described clearly and completely in conjunction with specific embodiments. Obviously, the described embodiments are only a part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0029] Embodiment 1.

[0030] The present application provides a colored lacquer, which comprises the following raw materials:

[0031] Natural lacquer, solvent, talc powder, leveling agent, modified pigment, additives;

[0032] The specific formula includes the following raw materials: natural lacquer 100 parts, solvent 20 parts, talc powder 10 parts, leveling agent 5 parts, modified pigment 8 parts, and additives 3 parts.

[0033] The leveling agent of this embodiment is a polyacrylate wetting leveling agent, and the mass percentage of the leveling agent in the colored lacquer is 1%.

[0034] The auxiliary agent of the embodiment includes a defoaming agent, a dispersant and a thickening agent, 10 parts of the defoaming agent, 20 parts of the dispersant and 10 parts of the thickening agent, and the viscosity of the thickening agent is 30000-120000 mPa·s at 20℃.

[0035] The defoaming agent of the embodiment is a polyether-modified silicone defoaming agent, the dispersant is a polypropionate dispersant containing a pigment affinity group, and the thickening agent is hydroxyethyl cellulose or an associated polyurethane thickening agent.

[0036] The modified pigment of the embodiment is prepared by the following steps:

[0037] S1, calcining the inorganic pigment by a calcination method to obtain inorganic pigment crude product, and crushing and dry grinding the inorganic pigment crude product to obtain inorganic pigment particles;

[0038] S2, mixing the inorganic pigment particles and the sodium polyacrylate solution according to a weight ratio of 5:2-3, dispersing by a disperser, and then heating to react to form a mixture A;

[0039] S3, adding the obtained mixture A into an octadecyl trimethyl ammonium chloride solution, adjusting the pH value to 5.5 by nitric acid, then protecting by nitrogen, increasing the temperature to 50℃, and then oscillating for 12 hours, vacuum drying at 45℃ for 24 hours after precipitation, grinding and passing through an 80-mesh sieve to obtain ultra-fine modified pigment.

[0040] The inorganic pigment of the embodiment is mixed by one or more of iron oxide red, iron oxide yellow, phthalocyanine blue, cobalt blue, phthalocyanine green, titanium chrome yellow, phthalocyanine blue and iron chrome black.

[0041] The calcination method of the embodiment uses an electric furnace for heating, and the inorganic pigment particles are put into a sintering furnace, the temperature is increased to 600℃ within 30 minutes, the calcination temperature is 600℃, the calcination time is 30 minutes, and the temperature is decreased to room temperature after calcination.

[0042] The color lacquer and the preparation method thereof of the embodiment include the following steps:

[0043] Step one, crushing and dry grinding talc according to weight parts, and drying the moisture to control the water content of the talc powder at 10%, wherein the drying temperature of the talc powder is 50℃, and the drying time is 1 hour

[0044] Step two, adding the lacquer, talc powder and leveling agent into a grinder, grinding to 20 microns, and then adding into a stirrer for mixing;

[0045] Step three, adding the modified pigment and the auxiliary agent into the stirrer in batches at a stirring speed of 300 revolutions / minute, and then stirring at a speed of more than 800 revolutions / minute for 20 minutes until completely dissolved;

[0046] Step four, adjust the blender to 200 revolutions per minute, add the solvent and stir evenly for 10 hours, and then pass through a 50-mesh screen to obtain the colored lacquer.

[0047] In step three of this embodiment, the heating temperature is 50℃, the modified pigment and the additive are added while stirring, and the stirring is stopped after heating to complete dissolution.

[0048] Example 2.

[0049] The present application of this embodiment provides a colored lacquer, which comprises the following raw materials:

[0050] Natural lacquer, solvent, talcum powder, leveling agent, modified pigment, additive;

[0051] The specific formula includes the following raw materials: natural lacquer 110 parts, solvent 25 parts, talcum powder 13 parts, leveling agent 8 parts, modified pigment 10 parts, and additive 4 parts.

[0052] The leveling agent of this embodiment is a polyacrylate wetting leveling agent, and the mass percentage of the leveling agent in the colored lacquer is 1.5%.

[0053] The additive of this embodiment includes a defoaming agent, a dispersant, and a thickening agent, with 18 parts of defoaming agent, 22 parts of dispersant, and 13 parts of thickening agent. The viscosity of the thickening agent is 30000-120000 mPa·s at a temperature of 25℃.

[0054] The defoaming agent of this embodiment is a polyether-modified silicone defoaming agent, the dispersant is a polypropionic acid ester dispersant containing a pigment affinity group, and the thickening agent is a hydroxyethyl cellulose or an associated polyurethane thickening agent.

[0055] The modified pigment of this embodiment is prepared by the following steps:

[0056] S1, calcine the inorganic pigment by calcination to obtain inorganic pigment crude product, and then crush and dry grind the inorganic pigment crude product to obtain inorganic pigment particles;

[0057] S2, mix the inorganic pigment particles and the sodium polyacrylate solution according to a weight ratio of 5:2-3, disperse them by a disperser, and then heat and react to form a mixture A;

[0058] S3, add the obtained mixture A into a solution of octadecyl trimethyl ammonium chloride, adjust the pH value to 5.5 with nitric acid, then protect it with nitrogen, heat it to 50℃, and then oscillate for 12 hours. After precipitation, vacuum dry it at an environment of 45℃ for 24 hours, grind it, and then pass it through a 90-mesh screen to obtain ultra-fine modified pigment.

[0059] The inorganic pigment of this embodiment is mixed by one or more of iron oxide red, iron oxide yellow, phthalocyanine blue, cobalt blue, phthalocyanine green, titanium chrome yellow, phthalocyanine blue, and iron chrome black.

[0060] The calcination method of the embodiment adopts electric furnace heating, and the inorganic pigment particles are placed in a sintering furnace, the temperature is raised to 600℃ within 30 minutes, the calcination temperature is 700℃, the calcination time is 40 minutes, and the temperature is lowered to room temperature after calcination.

[0061] The color lacquer of the embodiment and the preparation method thereof comprise the following steps:

[0062] Step one: the talc is weighed by weight parts, crushed and dry ground, and the moisture content is controlled at 15% after drying, wherein the drying temperature of the talc powder is 55℃, and the drying time is 1.5 hours

[0063] Step two: the lacquer, talc powder and leveling agent are added to a grinder and ground to 22 microns, and then added to a stirrer for mixing;

[0064] Step three: the modified pigment and the additive are added to the stirrer at a stirring speed of 350 revolutions per minute, and then stirred at a speed of more than 800 revolutions per minute for 20 minutes until completely dissolved;

[0065] Step four: the stirrer is adjusted to 250 revolutions per minute, the solvent is added and uniformly stirred and mixed for 11 hours, and then sieved through a 50 mesh sieve to obtain the color lacquer.

[0066] In step three of the embodiment, the heating temperature is 55℃, the modified pigment and the additive are added while stirring, and the stirring is stopped after heating to complete dissolution.

[0067] Embodiment 3.

[0068] The color lacquer of the embodiment of the present application comprises the following raw materials:

[0069] Natural lacquer, solvent, talc powder, leveling agent, modified pigment, additive;

[0070] The specific formula comprises the following raw materials: natural lacquer 200 parts, solvent 30 parts, talc powder 20 parts, leveling agent 10 parts, modified pigment 12 parts, and additive 5 parts.

[0071] The leveling agent of the embodiment is a polyacrylate wet leveling agent, and the mass percentage of the leveling agent in the color lacquer is 2%.

[0072] The additive of the embodiment comprises a defoaming agent, a dispersing agent and a thickening agent, wherein the defoaming agent is 20 parts, the dispersing agent is 25 parts, and the thickening agent is 15 parts, and the viscosity of the thickening agent is 120000 mPa·s at a temperature of 30℃.

[0073] The defoaming agent of the embodiment is a polyether modified silicone defoaming agent, the dispersing agent is a polypropionic acid ester dispersing agent containing a pigment affinity group, and the thickening agent is a hydroxyethyl cellulose or an associated polyurethane thickening agent.

[0074] The modified pigment of the embodiment is prepared by the following steps:

[0075] S1, calcining the inorganic pigment by a calcining method to obtain inorganic pigment crude product, and crushing and dry grinding the inorganic pigment crude product to obtain inorganic pigment particles;

[0076] S2, inorganic pigment particles and sodium polyacrylate solution are weighed according to a weight ratio of 5:2-3, mixed, dispersed by a dispersing machine, heated and reacted to form a mixture A;

[0077] S3, the obtained mixture A is added into a solution of octadecyl trimethyl ammonium chloride, the pH value is adjusted to 5.5 by nitric acid, then nitrogen protection is performed, the temperature is increased to 50℃, and oscillation reaction is performed for 12 hours, after precipitation, vacuum drying is performed at 45℃ for 24 hours, and after grinding, the ultra-fine modified pigment is obtained by passing through a 100 mesh sieve.

[0078] The inorganic pigment of the embodiment is mixed by one or more of iron oxide red, iron oxide yellow, phthalocyanine blue, cobalt blue, phthalocyanine green, titanium chrome yellow, phthalocyanine blue and iron chrome black.

[0079] The calcining method of the embodiment adopts electric furnace heating, the inorganic pigment particles are put into a sintering furnace, the temperature is increased to 600℃ within 30 minutes, the calcining temperature is 800℃, the calcining time is 50 minutes, and after calcining, the temperature is decreased to room temperature.

[0080] The color lacquer and the preparation method thereof of the embodiment comprise the following steps:

[0081] Step one, talc is weighed according to weight parts, crushed and dry ground, and the moisture content of the talc powder is controlled to be 20% by drying the moisture, wherein the drying temperature of the talc powder is 65℃, and the drying time is 2 hours

[0082] Step two, the lacquer, talc powder and leveling agent are added into a grinding machine, ground to 25 microns, and then added into a stirring machine for mixing;

[0083] Step three, the modified pigment and the additive are added into the stirring machine in batches at a stirring speed of 500 revolutions / minute, and then stirred at a speed of more than 800 revolutions / minute for 20 minutes until completely dissolved;

[0084] Step four, the stirring speed of the stirring machine is adjusted to 300 revolutions / minute, the solvent is added and uniformly stirred and mixed for 12 hours, and then the color lacquer is obtained by passing through a 50 mesh sieve.

[0085] In step three of the embodiment, the heating temperature is 65℃, the modified pigment and the additive are added while stirring, and the stirring is stopped after heating to completely dissolve.

[0086] The innovation of the present application lies in:

[0087] The color lacquer of the present application adds leveling agent and talcum powder in raw materials, the talcum powder has excellent lubricating and dispersing stability, can prevent particle sedimentation, improve the stability of the lacquer, the reflectivity of the color pigment to sunlight is higher, so it can achieve the effect of heat insulation while showing a variety of colors, expand the application range of the color lacquer, at the same time, the pigment is modified, and sodium polyacrylate is added in the modification process, which has repelling effect with the leveling agent, improves the dispersion uniformity of the pigment in the lacquer mixture, makes the pigment disperse uniformly in a short time, thereby improves the aesthetic effect of the color lacquer.

[0088] It will be obvious to a person skilled in the art that, without departing from the spirit or essential characteristics of the application, the present application can be implemented in other specific forms. The present examples are therefore to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the specification as such. All changes that come within the meaning of and equivalents to the claims are intended to be resolved in favour of the inventors. It is specifically intended that changes

[0089] Furthermore, it should be appreciated that, although the present specification describes particular embodiments, each of which contains only a single independent technical solution, the specification is merely provided for the sake of clarity and each of the technical solutions in the embodiments can be properly combined, to form other embodiments which can be understood by those skilled in the art.

Claims

1. A colored lacquer, characterized by, The paint comprises the following raw materials: Natural lacquer, solvent, talcum powder, leveling agent, modified pigment, additive; The specific formula The paint comprises the following raw materials: natural lacquer 100-200 parts, solvent 20-30 parts, talcum powder 10-20 parts, leveling agent 5-10 parts, modified pigment 8-12 parts, and additive 3-5 parts. The leveling agent is a polyacrylate wetting leveling agent. The additive comprises defoaming agent, dispersant and thickening agent, wherein the defoaming agent is 10-20 parts, the dispersant is 20-25 parts, and the thickening agent is 10-15 parts. The modified pigment is prepared by the following steps: S1, calcining the inorganic pigment by a calcining method to obtain inorganic pigment crude product, and then crushing and dry grinding the inorganic pigment crude product to obtain inorganic pigment particles; S2, mixing the inorganic pigment particles and sodium polyacrylate solution according to a weight ratio of 5:2-3, dispersing by a dispersing machine, and then heating to form a mixture A; S3, adding the mixture A into octadecyl trimethyl ammonium chloride solution, adjusting the pH value to 5.5 by nitric acid, then protecting by nitrogen, increasing the temperature to 50℃, and then oscillating for 12 hours, vacuum drying at 45℃ for 24 hours after precipitation, grinding and then passing through an 80-100 mesh sieve to obtain ultra-fine modified pigment.

2. The colored lacquer according to claim 1, characterized in that, The paint comprises the following raw materials: Natural lacquer 160 parts, solvent 25 parts, talcum powder 15 parts, leveling agent 8 parts, modified pigment 10 parts, and additive 4 parts.

3. The colored lacquer according to claim 1, wherein The defoaming agent is a polyether modified silicone defoaming agent, and the dispersant is a polypropionic acid ester dispersant containing pigment affinity groups.

4. The colored lacquer according to claim 1, wherein The inorganic pigment is mixed by one or more of red iron oxide, yellow iron oxide, cobalt blue, phthalocyanine green, titanium chrome yellow, phthalocyanine blue, and iron chrome black.

5. The colored lacquer according to claim 1, wherein The calcining method adopts electric furnace heating, the inorganic pigment particles are put into a sintering furnace, the temperature is increased to 600℃ within 30 minutes, the calcining temperature is 600-800℃, the calcining time is 30-50 minutes, and the temperature is decreased to room temperature after calcining.

6. The method for preparing colored lacquer according to any one of claims 1-5, characterized in that, The paint comprises the following steps: Step one, crushing and dry grinding talcum according to weight parts, and drying the moisture to control the water content of the talcum powder at 10-20%, wherein the drying temperature of the talcum powder is 50-65℃, and the drying time is 1-2 hours; Step two, adding natural lacquer, talcum powder and leveling agent into a grinding machine, grinding to 20-25 microns, and then adding into a stirring machine for mixing; Step three, adding modified pigment and additive into the stirring machine in batches at a stirring speed of 300-500 revolutions per minute, and then stirring at a speed of more than 800 revolutions per minute for 20 minutes until completely dissolved; Step four, adjusting the stirring machine to 200-300 revolutions per minute, adding solvent and uniformly stirring for 10-12 hours, and then passing through a 50 mesh sieve to obtain colored lacquer.

7. The method of claim 6, wherein the color Chinese lacquer is prepared by adding 0.1 to 1.0 parts by weight of the pigment to 100 parts by weight of the base lacquer. The heating temperature in step three is 50-65℃, the modified pigment and additive are added while stirring, and the stirring is stopped after heating to completely dissolve.