Mineral powder marking paint and production method thereof

Abstract

The invention discloses a mineral powder marking paint and a production method thereof, which belongs to the technical field of coatings, and comprises the following steps: preparing isoleucine grafted polyethylene glycol, mixing isoleucine with an activated polyethylene glycol solution to obtain isoleucine grafted polyethylene glycol; preparing modified nano-feather fibers, dispersing the nano-treated feather fibers into an acidified silane solution, filtering, and drying to obtain modified nano-feather fibers; and stirring water, potassium silicate, titanium dioxide, astaxanthin, an auxiliary agent, and the isoleucine grafted polyethylene glycol and the modified nano-feather fibers to uniformly mix to obtain a mineral powder marking paint. By using isoleucine modified polyethylene glycol, the water resistance of the coating is improved, by adding modified nano-feather fibers, the toughness of the coating is improved, and the coating is prevented from being easily cracked, and by adding astaxanthin, the coating is enhanced in anti-ultraviolet light and anti-oxidation ability, and the aging resistance is improved.

Description

Technical Field

[0001] The invention relates to the technical field of coatings, and in particular to a mineral powder line drawing coating and a production method thereof. Background Art

[0002] Inorganic coatings generally use silicate matrix as dispersion medium, which is non-toxic, free of VOC hazards such as free monomers, and will not decompose harmful substances at high temperatures. Inorganic coatings only consume certain resources during the production process and will not cause other environmental pollution. Inorganic coatings mainly use inorganic materials as film-forming substances, and the coatings have strong weather resistance after film formation.

[0003] Although inorganic coatings have many advantages over organic coatings, they also have some disadvantages. For example, mineral powder marking coatings have poor water resistance, easy cracking and aging.

[0004] The silicate in the mineral powder line marking paint can react with the substrate, enhancing the adhesion strength of the paint, so the paint has excellent adhesion and wear resistance. However, since the silicate in the paint itself can be dissolved in water, the -OH and metal ions such as Na+ and K+ in the generated gel have good hydrophilicity, making the three-dimensional silicate network formed by curing poor in water resistance. In addition, there are generally more brittle materials in the paint, such as calcium carbonate, glass powder, etc. Although these materials improve the wear resistance and strength of the paint, they reduce the toughness of the paint, causing the paint to be easily affected by pressure and other factors to produce cracks during actual application, accelerating the aging process of the paint and affecting the service life of the paint.

[0005] In the outdoor natural environment, mineral powder marking paint is often eroded by sunlight, rain, wind, and atmosphere. Especially under the irradiation of ultraviolet light, the electrons and holes of titanium dioxide in the titanium dioxide used in the paint can easily migrate to the surface of the material to form free radicals, causing the paint to oxidize, resulting in whitening, aging, loss of gloss, yellowing, and powdering of the paint.

[0006] Therefore, it is necessary to provide a mineral powder line drawing paint and a production method thereof to solve the problems existing in the above-mentioned prior art. Summary of the invention

[0007] In view of this, the present invention provides a mineral powder marking paint and a production method thereof. By using isoleucine-modified polyethylene glycol, the water resistance of the paint is improved. By adding modified nano-feather fibers, the toughness of the paint is improved to prevent the paint from cracking easily. In addition, astaxanthin is added to enhance the paint's resistance to ultraviolet light and oxidation, thereby improving aging resistance.

[0008] The specific scheme of the present invention is as follows: a method for producing a mineral powder line drawing coating comprises the following steps:

[0009] Step S1: preparing isoleucine-grafted polyethylene glycol, mixing isoleucine with an activated polyethylene glycol solution to obtain isoleucine-grafted polyethylene glycol;

[0010] Step S2: preparing modified nano-feather fibers, dispersing the nano-treated feather fibers into a γ-mercaptopropyltrimethoxysilane solution, filtering, and drying to obtain modified nano-feather fibers;

[0011] Step S3: water, potassium silicate, titanium dioxide, astaxanthin, additives, the isoleucine-grafted polyethylene glycol and the modified nano-feather fiber are stirred and evenly mixed to obtain a mineral powder marking paint.

[0012] The poor water resistance of mineral powder line painting is because water molecules can be inserted into the silicon-oxygen network of silicate molecules in the paint in the water environment, and react with Si-O-Si to form Si-OH. The Si-OH group is hydrophilic and can further react with water, resulting in further decomposition and rearrangement of the silicate structure, resulting in poor water resistance of the paint. By introducing isoleucine grafted polyethylene glycol, the amino group in isoleucine is used to react with the Si-OH group to generate Si-ON, which prevents the hydrolysis reaction from proceeding, thereby solving the problem of easy hydrolysis of water-based silicates in the paint. At the same time, the side chain structure of isoleucine in isoleucine grafted polyethylene glycol is -CH(CH3)-CH(CH3)2, and the methyl and isopropyl groups are both alkyl groups, which are non-polar, so they do not form hydrogen bonds with water molecules and do not dissolve in water, giving isoleucine a strong hydrophobicity, increasing the water resistance of isoleucine grafted polyethylene glycol, reducing the contact between the paint and water molecules, and further improving the water resistance of the paint.

[0013] This scheme modifies the nano-feather fibers by using γ-mercaptopropyltrimethoxysilane. The mercapto group can react chemically with the active groups of organic matter in the coating to form covalent bonds, while the siloxane group can react with the hydroxyl groups on the surface of inorganic materials to form siloxane bonds, so that the nano-feather fibers have good dispersibility and compatibility in the coating, avoiding agglomeration that affects the performance of the coating.

[0014] Use modified nano-feather fibers to improve the toughness of the coating. Feather fibers are mainly composed of keratin, which has high strength and elasticity. Keratin molecules are cross-linked through hydrogen bonds and disulfide bonds. This network structure makes feather fibers have good flexibility and durability. In addition, nano-feather fibers have a microporous structure that can absorb and disperse energy under the action of external forces, avoid stress concentration, reduce the generation of cracks in the coating, and achieve improved toughness and crack resistance of the coating.

[0015] By introducing astaxanthin, the stability of titanium dioxide under light conditions is improved. The multiple double bonds of astaxanthin can absorb some light, especially in the visible light region around 472nm, which protects titanium dioxide and improves its stability. Astaxanthin also has antioxidant ability and can effectively remove free radicals, preventing the coating from being oxidized and degraded by free radicals, thereby improving the anti-aging performance of the coating.

[0016] Potassium silicate can also react chemically with alkaline substances in the substrate to form a strong silicate network structure, thereby significantly improving the adhesion of the coating. It also has excellent high temperature resistance, is not easily affected by thermal expansion or aging, and is corrosion-resistant, allowing the coating to remain stable under various climatic conditions.

[0017] Preferably, in step S1: under ice bath conditions, N-hydroxysuccinimide (NHS) and dicyclohexylcarbodiimide (DCC) are added to a polyethylene glycol (PEG) solution and stirred for reaction to generate activated NHS-PEG; and isoleucine solution is slowly added to the activated NHS-PEG solution and stirred for reaction to generate isoleucine-grafted polyethylene glycol.

[0018] N-hydroxysuccinimide / dicyclohexylcarbodiimide can efficiently convert the terminal hydroxyl groups of polyethylene glycol into active esters. The active esters react very easily with the amino groups of isoleucine, have high selectivity and efficiency, and the by-products are easy to remove, which helps to obtain high-purity isoleucine-grafted polyethylene glycol.

[0019] Preferably, the stirring reaction speed under the ice bath condition is 400-600 r / min, and the reaction time is 4-6 h; the stirring speed of the isoleucine solution slowly added to the activated polyethylene glycol solution for stirring reaction is 400-600 r / min, and the reaction time is 10-14 h; the mass ratio of isoleucine to polyethylene glycol is 1:(14-18).

[0020] Preferably, in step S2: the feather fibers are cleaned, disinfected and cut into small segments of 1-2 mm; the feather fibers are nano-processed by ball milling technology to obtain powdered nano-feather fibers; the nano-feather fibers are ultrasonically dispersed in anhydrous ethanol, and then γ-mercaptopropyltrimethoxysilane solution is added for modification, and finally dried and solidified to obtain modified nano-feather fibers.

[0021] The feather fiber is at least one of chicken, duck and goose feather fibers; the ball milling speed is 900-1200r / min, and the ball milling time is 7-10h; the ultrasonic dispersion time is 20-40min, the curing temperature is 100-120°C, and the curing treatment time is 2-3h.

[0022] In step S3, the titanium dioxide is rutile; the auxiliary agents include inorganic acid, defoamer, epoxy coupling agent, thickener, pH regulator and acidified silane solution; the inorganic acid is phosphoric acid; the defoamer is defoamer BYK-012; the epoxy coupling agent is γ-glycidyloxypropyltrimethoxysilane; the thickener is hydroxyethyl cellulose or xanthan gum; the pH regulator is Dow AMP-95; and the acidified silane solution is acidified methyltrimethoxysilane solution.

[0023] Titanium dioxide, especially rutile type, has a very high refractive index and strong light scattering ability, making the paint surface uniform, bright and pure in color. At the same time, the high hardness and chemical stability of titanium dioxide make it have good wear resistance, reducing the wear and aging of the marking paint.

[0024] Preferably, calcium carbonate, isopentenyl chalcone and silicon-containing mineral powder are further added in step S3 and stirred and mixed evenly.

[0025] Isopentenyl chalcone has a conjugated double bond system, in which the α, β-unsaturated ketone part can effectively absorb ultraviolet rays of a specific wavelength (280-400nm region), which can make up for the problem that astaxanthin is easily decomposed under ultraviolet light, improve the stability of astaxanthin, and ensure that astaxanthin can exert its antioxidant and light resistance capabilities. Although isopentenyl chalcone has a strong ultraviolet light absorption capacity, it does not have the ability to absorb visible light. Astaxanthin can absorb visible light, and the combined action of the two can provide a wider range of light protection for coatings. Isopentenyl chalcone also has antioxidant ability, and can work together with astaxanthin to remove free radicals and improve the anti-aging performance of coatings.

[0026] Preferably, the silicon-containing mineral powder is at least one of talcum powder, zeolite powder and glass powder; and the stirring speed is 100-300 r / min.

[0027] To achieve the above object, the present invention further provides a mineral powder line drawing paint prepared by the above-mentioned production method of a mineral powder line drawing paint, comprising the following components in parts by weight:

[0028] 125-200 parts of water, 25-50 parts of potassium silicate, 10-20 parts of titanium dioxide, 0.5-2 parts of astaxanthin, 0.5-2 parts of isoleucine-grafted polyethylene glycol, 0.5-2 parts of modified feather nanofibers, and 12-19 parts of additives; the additives include 5-8 parts of inorganic acid, 1-2 parts of defoaming agent, 1-2 parts of epoxy coupling agent, 1-2 parts of thickener, 1-2 parts of pH regulator, and 3-6 parts of acidified silane solution.

[0029] Preferably, the following components in parts by weight are also included:

[0030] 5-15 parts of calcium carbonate; 0.5-2 parts of isopentenyl chalcone; 10-25 parts of silicon-containing mineral powder;

[0031] The raw materials of the isoleucine-grafted polyethylene glycol include 90-110 parts of polyethylene glycol, 8-12 parts of N-hydroxysuccinimide, 4-7 parts of dicyclohexylcarbodiimide, 5-7 parts of isoleucine and 3-6 parts of triethylamine;

[0032] The raw materials of the modified nano feather fiber include 3-5 parts of feather fiber and 30-50 parts of gamma-mercaptopropyltrimethoxysilane solution.

[0033] The above technical solution of the present invention includes at least the following beneficial effects:

[0034] (1) The present invention introduces isoleucine grafted polyethylene glycol and utilizes the amino group in isoleucine to react with the Si-OH group to generate Si-ON, thereby preventing the hydrolysis reaction from proceeding, thereby solving the problem of easy hydrolysis of water-based silicates in the coating; at the same time, the side chain structure -CH(CH3)-CH(CH3)2 of isoleucine in the isoleucine grafted polyethylene glycol is non-polar, which gives isoleucine a strong hydrophobicity, increases the water resistance of the isoleucine grafted polyethylene glycol, and improves the water resistance of the coating.

[0035] (2) The present invention introduces modified nano-feather fibers, and the network structure formed by the cross-linking of hydrogen bonds and disulfide bonds between keratin molecules in the feather fibers makes the feather fibers have good flexibility; and the microporous structure of the nano-feather fibers can avoid stress concentration and improve the toughness of the coating.

[0036] (3) The present invention introduces astaxanthin, whose multiple double bonds can absorb visible light and part of ultraviolet light, thereby improving the stability of titanium dioxide. Astaxanthin can effectively remove free radicals, prevent the coating from being oxidized and degraded by free radicals, and improve the anti-aging performance of the coating. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the embodiment of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described in combination with the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all the embodiments. Based on the described embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present invention.

[0038] The structural formula of the isopentenyl chalcone in the embodiment of the present invention is as follows, wherein the R group is generally H or -CH3:

[0039]

[0040] Example 1

[0041] Take 100 parts of polyethylene glycol PEG and add them to 1000 parts of dichloromethane solution. Add 10 parts of N-hydroxysuccinimide (NHS) and 6 parts of dicyclohexylcarbodiimide (DCC) under ice bath conditions, and stir at 400r / min for 4h to generate activated NHS-PEG. Take 6 parts of isoleucine and dissolve them in 600 parts of dichloromethane solution, then add 5 parts of triethylamine to neutralize the reaction system. Slowly add the isoleucine solution to the activated NHS-PEG solution, stir at 400r / min for 10h to generate isoleucine-grafted polyethylene glycol. Pour the reaction mixture into cold methanol to precipitate the solid, wash, filter, and dry to obtain isoleucine-grafted polyethylene glycol.

[0042] Take 4 parts of duck feather fiber, clean and disinfect, dry and cut into small segments of 1-2 mm, add to a ball mill, grind at 1100r / min for 9 hours to obtain powdered nano feather fiber. Add the nano feather fiber to anhydrous ethanol, ultrasonically disperse for 30 minutes, add 35 parts of γ-mercaptopropyltrimethoxysilane solution, stir slowly for 2 hours, filter, put the nano feather fiber into an oven, dry at 70°C for 1 hour, heat to 110°C, and solidify for 3 hours to obtain modified nano feather fiber.

[0043] According to weight parts, take 25 parts of potassium silicate, 15 parts of calcium carbonate powder, 11 parts of glass powder, 7 parts of talc, 7 parts of zeolite powder, and 5 parts of phosphoric acid, gradually and slowly add them into 125 parts of water, start stirring at 300r / min, then add 0.5 parts of isoleucine grafted polyethylene glycol and 1 part of defoamer, stir to ensure that the base material is fully dissolved and evenly dispersed, heat the mixed solution to 50°C, age for 30 hours to form a gel, add 6 parts of acidified silane solution and 1 part of pH regulator to the gel, continue stirring, add 0.5 parts of astaxanthin, 0.5 parts of isopentenyl chalcone, 1 part of modified nano feather fiber, and 15 parts of titanium dioxide, stir at 300r / min until the solution is evenly mixed, then add 1 part of epoxy coupling agent, and finally add 1 part of hydroxyethyl cellulose, stir at 300r / min to ensure that all ingredients are evenly dispersed, filter through a fine mesh, and obtain a marking coating.

[0044] Example 2

[0045] Take 90 parts of polyethylene glycol PEG and add them to 900 parts of dichloromethane solution. Add 8 parts of N-hydroxysuccinimide (NHS) and 4 parts of dicyclohexylcarbodiimide (DCC) under ice bath conditions, and stir at 450r / min for 4.5h to generate activated NHS-PEG. Take 5 parts of isoleucine and dissolve them in 500 parts of dichloromethane solution, and then add 4 parts of triethylamine to neutralize the reaction system. Slowly add the isoleucine solution to the activated NHS-PEG solution, stir at 450r / min for 11h to generate isoleucine-grafted polyethylene glycol. Pour the reaction mixture into cold methanol to precipitate the solid, wash, filter, and dry to obtain isoleucine-grafted polyethylene glycol.

[0046] Take 5 parts of goose feather fibers, clean and disinfect them, dry them and cut them into small pieces of 1-2 mm, add them into a ball mill, grind them at a speed of 1000r / min for 8 hours, and obtain powdered nano feather fibers. Add the nano feather fibers into anhydrous ethanol, ultrasonically disperse them for 30 minutes, add 30 parts of γ-mercaptopropyltrimethoxysilane solution, stir them slowly for 2 hours, filter them, put the nano feather fibers into an oven, dry them at 70°C for 1 hour, heat them to 110°C, and cure them for 2 hours to obtain modified nano feather fibers.

[0047] According to weight parts, take 30 parts of potassium silicate, 13 parts of calcium carbonate powder, 10 parts of glass powder, 6 parts of talc, 6 parts of zeolite powder, and 5 parts of phosphoric acid, gradually and slowly add them into 135 parts of water, start stirring at 300r / min, then add 0.5 parts of isoleucine grafted polyethylene glycol and 1 part of defoamer, stir to ensure that the base material is fully dissolved and evenly dispersed, heat the mixed solution to 50°C, age for 30 hours to form a gel, add 6 parts of acidified silane solution and 1 part of pH regulator to the gel, continue stirring, add 0.5 parts of astaxanthin, 0.5 parts of isopentenyl chalcone, 1 part of modified nano feather fiber, and 15 parts of titanium dioxide, stir at 300r / min until the solution is evenly mixed, then add 1 part of epoxy coupling agent, and finally add 1 part of hydroxyethyl cellulose, stir at 250r / min to ensure that all ingredients are evenly dispersed, filter through a fine mesh, and obtain a marking coating.

[0048] Example 3

[0049] Take 105 parts of polyethylene glycol PEG and add them to 1050 parts of dichloromethane solution. Add 12 parts of N-hydroxysuccinimide (NHS) and 6 parts of dicyclohexylcarbodiimide (DCC) under ice bath conditions, and stir at 500r / min for 5h to generate activated NHS-PEG. Take 7 parts of isoleucine and dissolve them in 700 parts of dichloromethane solution, and then add 3 parts of triethylamine to neutralize the reaction system. Slowly add the isoleucine solution to the activated NHS-PEG solution, stir at 500r / min for 12h to generate isoleucine-grafted polyethylene glycol. Pour the reaction mixture into cold methanol to precipitate the solid, wash, filter, and dry to obtain isoleucine-grafted polyethylene glycol.

[0050] Take 6 parts of goose feather fibers, clean and disinfect them, dry them and cut them into small pieces of 1-2 mm, add them into a ball mill, grind them at a speed of 1100r / min for 8.5 hours to obtain powdered nano feather fibers. Add the nano feather fibers into anhydrous ethanol, ultrasonically disperse them for 30 minutes, add 45 parts of γ-mercaptopropyltrimethoxysilane solution, stir them slowly for 2 hours, filter them, put the nano feather fibers into an oven, dry them at 70°C for 1 hour, heat them to 110°C, and cure them for 3 hours to obtain modified nano feather fibers.

[0051] According to weight, take 35 parts of potassium silicate, 11 parts of calcium carbonate powder, 8 parts of glass powder, 7 parts of talc, 5 parts of zeolite powder, and 6 parts of phosphoric acid, gradually and slowly add them into 150 parts of water, start stirring at 300r / min, then add 1 part of isoleucine grafted polyethylene glycol and 1.5 parts of defoamer, stir to ensure that the base material is fully dissolved and evenly dispersed, heat the mixed solution to 50°C, age for 30 hours to form a gel, add 5 parts of acidified silane solution and 1.5 parts of pH regulator to the gel, continue stirring, add 1 part of astaxanthin, 1 part of isopentenyl chalcone, 2 parts of modified nano feather fiber, and 20 parts of titanium dioxide, stir at 300r / min until the solution is evenly mixed, add 1.5 parts of epoxy coupling agent, and finally add 1.5 parts of hydroxyethyl cellulose, stir at 200r / min to ensure that all ingredients are evenly dispersed, filter through a fine mesh, and obtain a marking coating.

[0052] Example 4

[0053] Take 95 parts of polyethylene glycol PEG and add them to 950 parts of dichloromethane solution. Add 9 parts of N-hydroxysuccinimide (NHS) and 7 parts of dicyclohexylcarbodiimide (DCC) under ice bath conditions, and stir at 600r / min for 5.5h to generate activated NHS-PEG. Take 5 parts of isoleucine and dissolve them in 500 parts of dichloromethane solution, and then add 6 parts of triethylamine to neutralize the reaction system. Slowly add the isoleucine solution to the activated NHS-PEG solution, stir at 550r / min for 12h to generate isoleucine-grafted polyethylene glycol. Pour the reaction mixture into cold methanol to precipitate the solid, wash, filter, and dry to obtain isoleucine-grafted polyethylene glycol.

[0054] Take 3 parts of chicken feather fiber, clean and disinfect, dry and cut into small pieces of 1-2 mm, add to a ball mill, grind at 900r / min for 7 hours to obtain powdered nano feather fiber. Add the nano feather fiber to anhydrous ethanol, ultrasonically disperse for 20 minutes, add 50 parts of γ-mercaptopropyltrimethoxysilane solution, stir slowly for 2 hours, filter, put the nano feather fiber into an oven, dry at 70°C for 1 hour, heat to 100°C, and solidify for 2 hours to obtain modified nano feather fiber.

[0055] According to weight parts, take 40 parts of potassium silicate, 9 parts of calcium carbonate powder, 8 parts of glass powder, 5 parts of talc, 5 parts of zeolite powder, and 7 parts of phosphoric acid, gradually and slowly add them into 165 parts of water, start stirring at 300r / min, then add 1 part of isoleucine grafted polyethylene glycol and 1.5 parts of defoamer, stir to ensure that the base material is fully dissolved and evenly dispersed, heat the mixed solution to 50°C, age for 30 hours to form a gel, add 4 parts of acidified silane solution and 1.5 parts of pH regulator to the gel, continue stirring, add 1 part of astaxanthin, 1 part of isopentenyl chalcone, 2 parts of modified nano feather fiber, and 20 parts of titanium dioxide, stir at 300r / min until the solution is evenly mixed, add 1.5 parts of epoxy coupling agent, and finally add 1.5 parts of hydroxyethyl cellulose, stir at 150r / min to ensure that all ingredients are evenly dispersed, filter through a fine mesh, and obtain a marking coating.

[0056] Example 5

[0057] Take 110 parts of polyethylene glycol PEG and add them to 1100 parts of dichloromethane solution. Add 11 parts of N-hydroxysuccinimide (NHS) and 5 parts of dicyclohexylcarbodiimide (DCC) under ice bath conditions, and stir at 550r / min for 6h to generate activated NHS-PEG. Take 6 parts of isoleucine and dissolve them in 600 parts of dichloromethane solution, and then add 4 parts of triethylamine to neutralize the reaction system. Slowly add the isoleucine solution to the activated NHS-PEG solution, stir at 600r / min for 13h to generate isoleucine-grafted polyethylene glycol. Pour the reaction mixture into cold methanol to precipitate the solid, wash, filter, and dry to obtain isoleucine-grafted polyethylene glycol.

[0058] Take 5 parts of duck feather fiber, clean and disinfect, dry and cut into 1-2 mm small segments, add to a ball mill, grind at 1000r / min for 10 hours to obtain powdered nano feather fiber. Add the nano feather fiber to anhydrous ethanol, ultrasonically disperse for 30 minutes, add 40 parts of γ-mercaptopropyltrimethoxysilane solution, stir slowly for 2 hours, filter, put the nano feather fiber into an oven, dry at 70°C for 1 hour, heat to 110°C, and solidify for 2 hours to obtain modified nano feather fiber.

[0059] According to weight, take 45 parts of potassium silicate, 7 parts of calcium carbonate powder, 6 parts of glass powder, 4 parts of talc, 4 parts of zeolite powder, and 8 parts of phosphoric acid, gradually and slowly add them into 180 parts of water, start stirring at 300r / min, then add 2 parts of isoleucine grafted polyethylene glycol and 2 parts of defoaming agent, stir to ensure that the base material is fully dissolved and evenly dispersed, heat the mixed solution to 50°C, age for 30 hours to form a gel, add 3 parts of acidified silane solution and 2 parts of pH regulator to the gel, continue stirring, add 2 parts of astaxanthin, 2 parts of isopentenyl chalcone, 1 part of modified nano feather fiber, and 10 parts of titanium dioxide, stir at 300r / min until the solution is evenly mixed, then add 2 parts of epoxy coupling agent, and finally add 2 parts of hydroxyethyl cellulose, stir at 125r / min to ensure that all ingredients are evenly dispersed, filter through a fine mesh, and obtain a marking coating.

[0060] Example 6

[0061] Take 95 parts of polyethylene glycol PEG and add them to 950 parts of dichloromethane solution. Add 10 parts of N-hydroxysuccinimide (NHS) and 6 parts of dicyclohexylcarbodiimide (DCC) under ice bath conditions, and stir at 600r / min for 6h to generate activated NHS-PEG. Take 6 parts of isoleucine and dissolve them in 600 parts of dichloromethane solution, and then add 5 parts of triethylamine to neutralize the reaction system. Slowly add the isoleucine solution to the activated NHS-PEG solution, stir at 600r / min for 14h to generate isoleucine-grafted polyethylene glycol. Pour the reaction mixture into cold methanol to precipitate the solid, wash, filter, and dry to obtain isoleucine-grafted polyethylene glycol.

[0062] Take 5 parts of chicken feather fiber, clean and disinfect, dry and cut into small segments of 1-2 mm, add to a ball mill, grind at 1200r / min for 7 hours to obtain powdered nano feather fiber. Add the nano feather fiber to anhydrous ethanol, ultrasonically disperse for 40 minutes, add 35 parts of γ-mercaptopropyltrimethoxysilane solution, stir slowly for 2 hours, filter, put the nano feather fiber into an oven, dry at 70°C for 1 hour, heat to 120°C, and solidify for 2 hours to obtain modified nano feather fiber.

[0063] According to weight, take 50 parts of potassium silicate, 5 parts of calcium carbonate powder, 6 parts of glass powder, 2 parts of talc, 2 parts of zeolite powder, and 8 parts of phosphoric acid, gradually and slowly add them into 200 parts of water, start stirring at 300r / min, then add 2 parts of isoleucine grafted polyethylene glycol and 2 parts of defoaming agent, stir to ensure that the base material is fully dissolved and evenly dispersed, heat the mixed solution to 50°C, age for 30 hours to form a gel, add 3 parts of acidified silane solution and 2 parts of pH regulator to the gel, continue stirring, add 2 parts of astaxanthin, 2 parts of isopentenyl chalcone, 1 part of modified nano feather fiber, and 10 parts of titanium dioxide, stir at 300r / min until the solution is evenly mixed, then add 2 parts of epoxy coupling agent, and finally add 2 parts of hydroxyethyl cellulose, stir at 100r / min to ensure that all ingredients are evenly dispersed, filter through a fine mesh, and obtain a marking coating.

[0064] The present invention also carries out comparative examples and related tests.

[0065] Comparative Example 1

[0066] The difference between Comparative Example 1 and Example 3 is that isoleucine-grafted polyethylene glycol is not used, but polyethylene glycol is used instead of isoleucine-grafted polyethylene glycol. The other compositions and preparation methods are the same as those of Example 3, and a mineral powder marking coating is prepared.

[0067] Comparative Example 2

[0068] The difference between Comparative Example 2 and Example 3 is that the modified nano-feather fiber is not added, and the other compositions and preparation methods are the same as those of Example 3, and a mineral powder line drawing coating is prepared.

[0069] Comparative Example 3

[0070] The difference between Comparative Example 3 and Example 3 is that astaxanthin is not used, and other compositions and preparation methods are the same as those of Example 3, and a mineral powder line drawing coating is prepared.

[0071] Performance testing

[0072] The adhesion, water resistance, toughness and anti-aging properties of the marking coatings of Examples 1-6 and Comparative Examples 1-3 were tested according to the following standards.

[0073] The reference standard for the adhesion test is GB / T 5210-2006, and the evaluation index of the test result is the destructive strength. The greater the destructive strength, the better the adhesion. The reference standard for the water resistance test is GB / T 1733-1993, and the evaluation standard for the test result is whether there is blistering or shedding. The reference standard for the toughness test is GB / T 6742-2007, and the evaluation standard for the test result is whether there is cracking. The final test results are summarized in Table 1 below.

[0074] Table 1

[0075]

[0076] From the result data in Table 1, it can be clearly seen that the marking coatings obtained in Examples 1-6 of the present invention have good adhesion, water resistance and toughness, and can be used in various occasions such as road marking, parking lot marking and industrial ground marking.

[0077] According to the comparison between Comparative Example 1 and Examples 1-6, it can be seen that the use of polyethylene glycol instead of isoleucine-grafted polyethylene glycol causes blistering and shedding of the coating, which shows that isoleucine-grafted polyethylene glycol can effectively improve the water resistance of the coating; according to the comparison between Comparative Example 2 and Examples 1-6, it can be seen that the failure to use modified nano-feather fibers causes cracks in the coating, indicating that the modified nano-feather fibers have an effect on the toughness of the coating.

[0078] The wear resistance, oxidation resistance and UV resistance of the line marking coatings of Examples 1-6 and Comparative Examples 1-3 were tested according to the following standards.

[0079] The reference standard for the wear resistance test is GB / T 1768-2006, and the test result evaluation standard is (750g / 1000r) / mg. The smaller the wear mass, the better the wear resistance. The reference standard for the oxidation resistance test is GB / T 1766-2008, and the test result evaluation standard is whether powdering occurs. The reference standard for the UV resistance test is GB / T 1865-2009, and the test result evaluation standard is whether discoloration occurs. The final test results are summarized in Table 2 below.

[0080] Table 2

[0081]

[0082] According to the test results of Examples 1-6 in Table 2, it can be concluded that the wear resistance, oxidation resistance and UV resistance of the coating all meet the standards.

[0083] In Comparative Example 3, astaxanthin was not used, resulting in powdering and discoloration of the coating in the antioxidant and UV resistance tests, indicating that the use of astaxanthin has an impact on the antioxidant and UV resistance of the coating.

[0084] The above are preferred embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A method for producing a mineral powder line marking paint, It is characterized in that The following steps are involved: Step S1: preparing isoleucine-grafted polyethylene glycol, mixing isoleucine with an activated polyethylene glycol solution to obtain isoleucine-grafted polyethylene glycol; Step S2: preparing modified nano-feather fibers, dispersing the nano-treated feather fibers into a γ-mercaptopropyltrimethoxysilane solution, filtering, and drying to obtain modified nano-feather fibers; Step S3: water, potassium silicate, titanium dioxide, astaxanthin, additives, the isoleucine-grafted polyethylene glycol and the modified nano-feather fiber are stirred and evenly mixed to obtain a mineral powder marking paint.

2. The method for producing a mineral powder line marking paint according to claim 1, It is characterized in that In the step S1: adding N-hydroxysuccinimide and dicyclohexylcarbodiimide to a polyethylene glycol solution under ice bath conditions and stirring to react to generate activated polyethylene glycol; The isoleucine solution is slowly added into the activated polyethylene glycol solution and stirred for reaction to generate isoleucine-grafted polyethylene glycol.

3. The method for producing a mineral powder line marking paint according to claim 2, It is characterized in that The stirring reaction speed under the ice bath condition is 400-600r / min, and the reaction time is 4-6h; the stirring reaction speed of the isoleucine solution slowly added to the activated polyethylene glycol solution is 400-600r / min, and the reaction time is 10-14h; the mass ratio of isoleucine to polyethylene glycol is 1:(14-18).

4. The method for producing a mineral powder line marking paint according to claim 1, It is characterized in that In the step S2, the feather fibers are cleaned, disinfected and cut into small segments of 1-2 mm; the feather fibers are nano-processed by ball milling technology to obtain powdered nano-feather fibers; the nano-feather fibers are ultrasonically dispersed in anhydrous ethanol, and then γ-mercaptopropyltrimethoxysilane solution is added to perform modification treatment, and finally dried and solidified to obtain modified nano-feather fibers.

5. The method for producing a mineral powder line marking paint according to claim 4, It is characterized in that The feather fiber is at least one of chicken, duck and goose feather fibers; the ball milling speed is 900-1200r / min, and the ball milling time is 7-10h; the ultrasonic dispersion time is 20-40min, the curing temperature is 100-120°C, and the curing treatment time is 2-3h.

6. The method for producing a mineral powder road marking paint according to claim 1, It is characterized in that In step S3, the titanium dioxide is rutile; the auxiliary agents include inorganic acid, defoamer, epoxy coupling agent, thickener, pH regulator and acidified silane solution; the inorganic acid is phosphoric acid; the defoamer is defoamer BYK-012; the epoxy coupling agent is γ-glycidyloxypropyltrimethoxysilane; the thickener is hydroxyethyl cellulose or xanthan gum; the pH regulator is Dow AMP-95; and the acidified silane solution is acidified methyltrimethoxysilane solution.

7. The method for producing a mineral powder line marking paint according to claim 1, It is characterized in that In the step S3, calcium carbonate, isopentenyl chalcone and silicon-containing mineral powder are added and stirred to be uniformly mixed.

8. The method for producing a mineral powder line marking paint according to claim 7, It is characterized in that The silicon-containing mineral powder is at least one of talcum powder, zeolite powder and glass powder; in the step S3, after adding calcium carbonate, isopentenyl chalcone and silicon-containing mineral powder, the stirring speed is 100-300r / min.

9. A mineral powder marking paint, It is characterized in that The mineral powder line marking coating is prepared by the production method of any one of claims 1 to 8, and comprises the following components in parts by weight: 125-200 parts of water, 25-50 parts of potassium silicate, 10-20 parts of titanium dioxide, 0.5-2 parts of astaxanthin, 0.5-2 parts of isoleucine-grafted polyethylene glycol, 0.5-2 parts of modified feather nanofibers, and 12-19 parts of additives; The auxiliary agent comprises the following components in parts by weight: 5-8 parts of inorganic acid, 1-2 parts of defoaming agent, 1-2 parts of epoxy coupling agent, 1-2 parts of thickener, 1-2 parts of pH value regulator and 3-6 parts of acidified silane solution.

10. The mineral powder line marking paint according to claim 9, It is characterized in that The coating also includes the following components in parts by weight: 5-15 parts of calcium carbonate; 0.5-2 parts of isopentenyl chalcone; 10-25 parts of silicon-containing mineral powder; The raw materials of the isoleucine-grafted polyethylene glycol include 90-110 parts of polyethylene glycol, 8-12 parts of N-hydroxysuccinimide, 4-7 parts of dicyclohexylcarbodiimide, 5-7 parts of isoleucine and 3-6 parts of triethylamine; The raw materials of the modified nano feather fiber include 3-5 parts of feather fiber and 30-50 parts of gamma-mercaptopropyltrimethoxysilane.

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