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CN110591431A - Rare earth modified water-based alkyd resin antibacterial luminescent coating - Google Patents

Rare earth modified water-based alkyd resin antibacterial luminescent coating Download PDF

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Publication number
CN110591431A
CN110591431A CN201910820184.9A CN201910820184A CN110591431A CN 110591431 A CN110591431 A CN 110591431A CN 201910820184 A CN201910820184 A CN 201910820184A CN 110591431 A CN110591431 A CN 110591431A
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parts
rare earth
alkyd resin
modified waterborne
waterborne alkyd
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张武
康伦国
姚东生
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Shaoguan Union Chemical Co Ltd
Union Foshan Chemical Co Ltd
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Shaoguan Union Chemical Co Ltd
Union Foshan Chemical Co Ltd
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    • C08GMACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G63/00Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
    • C08G63/02Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds
    • C08G63/12Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds derived from polycarboxylic acids and polyhydroxy compounds
    • C08G63/46Polyesters chemically modified by esterification
    • C08G63/48Polyesters chemically modified by esterification by unsaturated higher fatty oils or their acids; by resin acids
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    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08GMACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G63/00Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
    • C08G63/78Preparation processes
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    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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    • C09D167/00Coating compositions based on polyesters obtained by reactions forming a carboxylic ester link in the main chain; Coating compositions based on derivatives of such polymers
    • C09D167/08Polyesters modified with higher fatty oils or their acids, or with natural resins or resin acids
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    • C09D5/00Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/14Paints containing biocides, e.g. fungicides, insecticides or pesticides
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    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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    • C09D5/00Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/22Luminous paints
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    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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    • C09D7/00Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40Additives
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    • C08L2205/02Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
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Abstract

The invention relates to a rare earth modified water-based alkyd resin antibacterial luminescent coating which comprises the following components in parts by weight: 35.0-55.0 parts of rare earth modified waterborne alkyd resin, 15.0-25.0 parts of fluorine modified waterborne alkyd resin, 0.0-25.0 parts of filler, 1.2-6.0 parts of assistant, 2.5-6.5 parts of solid glass beads, 3.5-6.5 parts of film-forming assistant and 10.0-30.0 parts of deionized water; the rare earth modified waterborne alkyd resin is mainly prepared by reacting vegetable oil, organic acid anhydride, carboxylic acid Schiff base, polyol, benzoic acid, dimethylolpropionic acid, a rare earth ethanol solution, a sodium ethoxide ethanol solution and a neutralizing agent; the rare earth modified waterborne alkyd resin antibacterial luminescent coating prepared by the invention does not need luminescent powder and an antibacterial agent, and has the characteristics of good aging resistance, difficult pulverization, lasting antibacterial property, long luminescence duration and the like.

Description

Rare earth modified water-based alkyd resin antibacterial luminescent coating
Technical Field
The invention relates to preparation of a water-based paint, in particular to a rare earth modified water-based alkyd resin antibacterial luminescent paint and a preparation method thereof, belonging to the technical field of water-based functional paints.
Background
With the rapid development of economy in China, the coating is more and more widely applied to industry, agriculture, national defense, scientific research and people's life, the coating is a liquid or fixed material which is coated on the surface of an object and forms a film under certain conditions to play a role in protection, decoration and specification, the existing coating has some defects, such as the decorated object surface is rigid and unchanged, the luminous effect cannot be displayed at night, part of raw materials are toxic or flammable and explosive, and have no environmental protection performance, so that the coating has harm to production and construction personnel, and meanwhile, the coating has a large amount of microorganisms, bacteria and germs in the environment, and most of the coating has no antibacterial effect, so that the coating with single performance cannot meet the diversified demands of the market.
The distribution of microorganisms in the environment is very wide, so that the survival and health of human beings are threatened by various bacteria and viruses all the time, almost all the abiotic surfaces have the microorganisms, at present, many antibacterial coatings are additive antibacterial coatings, and an antibacterial agent is added to achieve a certain antibacterial effect.
The energy storage luminescent materials applied to the coating at present mainly have two types, one type is a copper activated zinc sulfide series luminescent material; one is rare earth activated alkaline earth metal aluminate luminescent material. Copper-activated zinc sulfide series luminescent materials generally have short afterglow time, and radioactive elements are often doped in order to prolong the afterglow time, so that environmental pollution is caused. The rare earth activated alkaline earth metal aluminate luminescent material not only greatly prolongs afterglow time, but also does not contain radioactive elements, and is gradually and widely applied to the fields of traffic signs, safety signs, emergency signs in public places, decorative materials and the like. But most of the components are added in a physical doping mode, so that the components are difficult to disperse uniformly and easy to agglomerate, and the performance of the coating is influenced.
Chinese patent CN108659652A discloses an energy-storage luminous paint and a preparation method thereof. The energy storage luminous paint comprises the following components in percentage by mass: 15-25% of energy storage luminescent powder, 60-70% of water-based resin, 1-2% of polyamide wax and the balance of solvent. The energy storage luminescent powder comprises the following components in percentage by mass: 15-40% of strontium carbonate, 20-40% of barium metaaluminate, 30-50% of aluminum oxide, 1.5-2.5% of dysprosium oxide and 1-2% of europium oxide.
Chinese patent CN101250344A discloses an antibacterial coating and a preparation method thereof, which comprises the following raw materials in parts by weight: 1-10 parts of an antibacterial agent, 2-30 parts of an organic silicate, 10-40 parts of a silane coupling agent and 40-90 parts of water.
Said invention adopts external addition of antibacterial agent or energy-storing luminescent powder to make the paint possess a certain antibacterial property and luminescent property, but the additive type paint has the defects of non-uniform dispersion, easy migration, degradation, colour change, non-durable effect and environmental pollution, etc..
Disclosure of Invention
In order to solve the technical problems, the rare earth modified waterborne alkyd resin with the light-emitting performance and the antibacterial performance is introduced to be used as a film-forming substance of the paint without adding luminescent powder and an antibacterial agent, and the rare earth modified waterborne alkyd resin contains a Schiff base structure, so that the Schiff base compound has good bacteriostatic, bactericidal and antifungal effects; meanwhile, the rare earth ions are directly introduced into the water-based alkyd resin, and the energy efficiency transfer between the rare earth ions and the water-based alkyd resin can be effectively realized because the rare earth ions are directly connected with the water-based alkyd resin. So that the rare earth modified waterborne alkyd resin has good antibacterial property and luminescence property.
The invention aims to provide a rare earth modified waterborne alkyd resin and a preparation method thereof.
The invention also aims to provide the rare earth modified water-based alkyd resin antibacterial luminescent coating and a preparation method thereof.
In order to solve the technical problems, the invention adopts the following technical scheme: the invention relates to a rare earth modified water-based alkyd resin antibacterial luminescent coating which comprises the following components in parts by weight: 35.0-55.0 parts of rare earth modified waterborne alkyd resin, 15.0-25.0 parts of fluorine modified waterborne alkyd resin, 0.0-25.0 parts of filler, 1.2-6.0 parts of assistant, 2.5-6.5 parts of solid glass beads, 3.5-6.5 parts of film-forming assistant and 10.0-30.0 parts of deionized water.
The rare earth modified waterborne alkyd resin comprises the following components in parts by weight: 6.5-13.0 parts of vegetable oil, 6.5-15.0 parts of organic acid anhydride, 1.5-3.0 parts of carboxylic acid Schiff base, 6.0-12.0 parts of polyol, 1.0-2.5 parts of benzoic acid, 1.5-2.5 parts of dimethylolpropionic acid, 0.6-1.5 parts of rare earth ethanol solution, 0.7-2.0 parts of sodium ethoxide ethanol solution, 6.0-12.0 parts of xylene, 3.0-5.0 parts of neutralizer and 45.0-65.0 parts of deionized water.
Wherein the vegetable oil is one or more of dehydrated linseed oil, dehydrated tung oil, dehydrated rapeseed oil, dehydrated peanut oil, dehydrated soybean oil and dehydrated castor oil.
The organic acid anhydride is one or a combination of more of acetic anhydride, maleic anhydride, adipic acid and sebacic acid.
The polyhydric alcohol is one or a combination of more of propylene glycol, 1, 4-butanediol, hexanediol, neopentyl glycol, diethylene glycol, dipropylene glycol, trimethylolpropane, glycerol and pentaerythritol.
The rare earth ethanol solution is 0.1 mol.L-1Nd (NO)3)3Ethanol solution, Eu (NO)3)3Ethanol solution, Gd (NO)3)3Ethanol solution, Dy (NO)3)3One or a combination of several of ethanol solution.
The neutralizing agent is at least one of triethylamine, ammonia water and dimethylethanolamine.
The filler is one or a combination of more of mica powder, titanium dioxide, barium sulfate, lithopone, diatomite and kaolin.
The auxiliary agent comprises one or a combination of more of a flatting agent, a wetting agent, a dispersing agent, a defoaming agent, an anti-settling rheological agent and a pH regulator.
The particle size of the solid glass bead is 50-100 nm.
The film-forming assistant is one or a combination of a plurality of alcohol ester dodeca, propylene glycol monobutyl ether and monopropylene glycol methyl ether acetate.
The invention provides a preparation method of rare earth modified waterborne alkyd resin, which comprises the following steps:
a) adding vegetable oil, organic acid anhydride, polyol, dimethylolpropionic acid and dimethylbenzene in sequence according to the weight part of the formula in a multifunctional reaction kettle, and introducing N under the condition of low-speed stirring2To remove O in the reaction kettle2
b) Heating to 105-110 ℃ until reflux, keeping the temperature for 0.5h, removing part of water, quickly heating to 150-160 ℃, fully stirring until the materials are dissolved, stirring at a rotating speed of 200-400 r/min for heat preservation reaction for 1h, then heating to 180 ℃ at a speed of 20 ℃/h for heat preservation reaction for 1h, adding benzoic acid, continuing to carry out heat preservation reaction for 1-1.5 h, heating to 210-220 ℃ at a speed of 20 ℃/h, carrying out heat preservation reaction for 3.0-3.5 h, measuring the acid value and the design value until the acid value and the design value are measured, and separating out water generated by the reaction by using a water separator;
c) cooling to 160 ℃ at a speed of 40 ℃/h, adding carboxylic acid Schiff base, stirring for reaction for 1-1.5 h, then quickly heating to 220-230 ℃, carrying out heat preservation for reaction for 3.0-4.0 h, measuring the acid value every 15-30 min, cooling to 160 ℃ when the acid value reaches a theoretical design value, starting vacuum evaporation to remove solvent xylene, cooling to below 50 ℃, adding a neutralizing agent, quickly stirring and dispersing for 15-20 min, adding deionized water with a formula amount, and continuously stirring for 0.5h until the mixture is uniformly dispersed to obtain the water-based alkyd resin;
d) heating the waterborne alkyd resin to 65-70 ℃, then dripping a rare earth ethanol solution, stirring and reacting for 0.5h, and reacting by using 0.5 mol.L-1And slowly adjusting the pH value of the solution to 7.0-7.5 by using the sodium ethoxide ethanol solution, continuously reacting for 2-2.5 h, stopping the reaction, and filtering to obtain the rare earth modified waterborne alkyd resin.
The invention discloses rare earth modified waterborne alkyd resin, which is based on the applied invention patent 'a rare earth modified waterborne alkyd resin and a preparation method thereof' and is described in detail.
The rare earth modified waterborne alkyd resin antibacterial luminescent coating prepared by the invention does not need luminescent powder and an antibacterial agent, and the antibacterial property and the luminescent property of the coating are mainly provided by a film-forming substance, namely the rare earth modified waterborne alkyd resin; the light-emitting material has the characteristics of good aging resistance, difficult pulverization, lasting antibacterial performance, long light-emitting duration and the like, and has wide application prospect.
Compared with the prior art, the invention has the following advantages:
1) the product of the invention takes water as a solvent, and does not contain toxic and harmful components such as heavy metal, organic solvent and the like;
2) the problems of easy pulverization, uneven dispersion and the like of the external luminescent powder are solved without the external luminescent powder;
3) the rare earth modified water-based alkyd resin with lasting antibacterial property is used as a main film forming substance of the coating, so that the coating has good antibacterial capability, and the defect of an additional antibacterial agent is overcome.
Detailed Description
The present invention is further described with reference to the following examples to prepare a rare earth modified waterborne alkyd antibacterial luminescent coating. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention.
Example 1
A rare earth modified water-based alkyd resin X comprises the following steps:
a) adding 8.5 parts of dehydrated linseed oil, 7.8 parts of maleic anhydride, 2.2 parts of 1, 4-butanediol, 5.8 parts of trimethylolpropane, 1.8 parts of dimethylolpropionic acid and 8.0 parts of dimethylbenzene in sequence in a multifunctional reaction kettle according to the weight parts of the formula, and introducing N into the reaction kettle under low-speed stirring2To remove O in the reaction kettle2
b) Heating to 105-110 ℃ until reflux, keeping the temperature for 0.5h, removing part of water, quickly heating to 150-160 ℃, fully stirring until the materials are dissolved, stirring at a rotating speed of 200-400 r/min for heat preservation reaction for 1h, then heating to 180 ℃ at a speed of 20 ℃/h for heat preservation reaction for 1h, adding 1.4 parts of benzoic acid, continuing to carry out heat preservation reaction for 1-1.5 h, heating to 210-220 ℃ at a speed of 20 ℃/h, carrying out heat preservation reaction for 3.0-3.5 h, measuring the acid value and the designed value until the acid value and the designed value are measured, and separating the water generated by the reaction by using a water separator;
c) cooling to 160 ℃ at a speed of 40 ℃/h, adding 1.8 parts of carboxylic acid Schiff base, stirring for reaction for 1-1.5 h, then quickly heating to 220-230 ℃, carrying out heat preservation reaction for 3.0-4.0 h, measuring the acid value every 15-30 min, cooling to 160 ℃ when the acid value reaches a theoretical design value, starting vacuum evaporation to remove solvent xylene, cooling to below 50 ℃, adding 3.5 parts of a neutralizing agent, quickly stirring for dispersion for 15-20 min, adding 57.5 parts of deionized water according to the formula amount, and continuously stirring for 0.5h until the solution is uniformly dispersed to obtain the water-based alkyd resin;
d) heating the water-based alkyd resin to 65-70 ℃, and then dropwise adding Nd (NO)3)30.8 part of ethanol solution is stirred and reacted for 0.5h, and 0.5 mol.L is used-1And slowly adjusting the pH value of the solution to 7.0-7.5 by using 0.9 part of sodium ethoxide ethanol, continuously reacting for 2-2.5 h, stopping the reaction, and filtering to obtain the rare earth modified waterborne alkyd resin X.
Example 2
A rare earth modified waterborne alkyd resin Y comprises the following steps:
a) adding 9.5 parts of dehydrated soybean oil, 2.8 parts of acetic anhydride, 7.2 parts of adipic acid, 3.2 parts of neopentyl glycol, 5.3 parts of pentaerythritol, 1.6 parts of dimethylolpropionic acid and 9.0 parts of dimethylbenzene in a multifunctional reaction kettle according to the weight parts of the formula in sequence, and introducing N into the mixture under low-speed stirring2To remove O in the reaction kettle2
b) Heating to 105-110 ℃ until reflux, keeping the temperature for 0.5h, removing part of water, quickly heating to 150-160 ℃, fully stirring until the materials are dissolved, stirring at a rotating speed of 200-400 r/min for heat preservation reaction for 1h, then heating to 180 ℃ at a speed of 20 ℃/h for heat preservation reaction for 1h, adding 1.5 parts of benzoic acid, continuing to carry out heat preservation reaction for 1-1.5 h, heating to 210-220 ℃ at a speed of 20 ℃/h, carrying out heat preservation reaction for 3.0-3.5 h, measuring the acid value and the designed value until the acid value and the designed value are measured, and separating the water generated by the reaction by using a water separator;
c) cooling to 160 ℃ at a speed of 40 ℃/h, adding 2.0 parts of carboxylic acid Schiff base, stirring for reaction for 1-1.5 h, then quickly heating to 220-230 ℃, carrying out heat preservation reaction for 3.0-4.0 h, measuring the acid value every 15-30 min, cooling to 160 ℃ when the acid value reaches a theoretical design value, starting vacuum evaporation to remove solvent xylene, cooling to below 50 ℃, adding 3.8 parts of a neutralizing agent, quickly stirring for dispersion for 15-20 min, adding 52.1 parts of deionized water according to the formula amount, and continuously stirring for 0.5h until the solution is uniformly dispersed to obtain the water-based alkyd resin;
d) heating the water-based alkyd resin to 65-70 ℃, and then dropwise adding Eu (NO)3)30.9 part of ethanol solution is stirred and reacted for 0.5h, and 0.5 mol.L is used-1And slowly adjusting the pH value of the solution to 7.0-7.5 by using 1.1 parts of sodium ethoxide ethanol, continuously reacting for 2-2.5 hours, stopping the reaction, and filtering to obtain the rare earth modified waterborne alkyd resin Y.
Example 3
A rare earth modified water-based alkyd resin antibacterial luminescent coating comprises the following components in parts by weight: 40.0 parts of rare earth modified waterborne alkyd resin X, 18.0 parts of fluorine modified waterborne alkyd resin, 4.5 parts of diatomite, 5.5 parts of titanium dioxide, 3.5 parts of solid glass beads, 0.3 part of flatting agent, 0.5 part of wetting agent, 0.8 part of dispersing agent, 0.6 part of defoaming agent, 0.3 part of anti-settling rheological agent, 2.5 parts of pH regulator, 4.0 parts of film-forming auxiliary agent and 19.5 parts of deionized water.
Example 4
A rare earth modified water-based alkyd resin antibacterial luminescent coating comprises the following components in parts by weight: 52.0 parts of rare earth modified water-based alkyd resin Y, 20.0 parts of fluorine modified water-based alkyd resin, 3.5 parts of solid glass beads, 0.2 part of flatting agent, 0.3 part of wetting agent, 0.2 part of dispersing agent, 0.3 part of defoaming agent, 1.5 parts of pH regulator, 5.0 parts of film-forming assistant and 17.0 parts of deionized water.
The examples of the present invention were compared with aqueous alkyd resin paints (comparative examples) according to the relevant standards of water resistance (GB/T1733-1993), adhesion (GB/T9286-1998), pencil hardness (GB/T6739-1996), acid resistance (GB/T1763-1979), alkali resistance (GB/1763-.
Table 1: performance index of the examples of the invention and the aqueous alkyd resin coating (comparative example)
Although the present invention has been described in detail and with reference to exemplary embodiments thereof, it will be apparent to one skilled in the art that various changes, modifications and variations can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (11)

1. A rare earth modified water-based alkyd resin antibacterial luminescent coating is characterized in that: the composition comprises the following components in parts by weight: 35.0-55.0 parts of rare earth modified waterborne alkyd resin, 15.0-25.0 parts of fluorine modified waterborne alkyd resin, 0.0-25.0 parts of filler, 1.2-6.0 parts of assistant, 2.5-6.5 parts of solid glass beads, 3.5-6.5 parts of film-forming assistant and 10.0-30.0 parts of deionized water;
the rare earth modified waterborne alkyd resin comprises the following components in parts by weight: 6.5-13.0 parts of vegetable oil, 6.5-15.0 parts of organic acid anhydride, 1.5-3.0 parts of carboxylic acid Schiff base, 6.0-12.0 parts of polyol, 1.0-2.5 parts of benzoic acid, 1.5-2.5 parts of dimethylolpropionic acid, 0.6-1.5 parts of rare earth ethanol solution, 0.7-2.0 parts of sodium ethoxide ethanol solution, 6.0-12.0 parts of xylene, 3.0-5.0 parts of neutralizer and 45.0-65.0 parts of deionized water.
2. The rare earth-modified waterborne alkyd resin of claim 1, wherein: the vegetable oil is one or more of dehydrated linseed oil, dehydrated tung oil, dehydrated rapeseed oil, dehydrated peanut oil, dehydrated soybean oil and dehydrated castor oil.
3. The rare earth-modified waterborne alkyd resin of claim 1, wherein: the organic acid anhydride is one or a combination of more of acetic anhydride, maleic anhydride, adipic acid and sebacic acid.
4. The rare earth-modified waterborne alkyd resin of claim 1, wherein: the polyhydric alcohol is one or a combination of more of propylene glycol, 1, 4-butanediol, hexanediol, neopentyl glycol, diethylene glycol, dipropylene glycol, trimethylolpropane, glycerol and pentaerythritol.
5. The rare earth-modified waterborne alkyd resin of claim 1, wherein: the rare earth ethanol solution is 0.1 mol.L-1Nd (NO)3)3Ethanol solution, Eu (NO)3)3Ethanol solution, Gd (NO)3)3Ethanol solution, Dy (NO)3)3One or a combination of several of ethanol solution.
6. The rare earth-modified waterborne alkyd resin of claim 1, wherein: the neutralizing agent is at least one of triethylamine, ammonia water and dimethylethanolamine.
7. The rare earth-modified waterborne alkyd antibacterial luminescent coating of claim 1, wherein: the filler is one or a combination of more of mica powder, titanium dioxide, barium sulfate, lithopone, diatomite and kaolin.
8. The rare earth-modified waterborne alkyd antibacterial luminescent coating of claim 1, wherein: the auxiliary agent comprises one or a combination of more of a flatting agent, a wetting agent, a dispersing agent, a defoaming agent, an anti-settling rheological agent and a pH regulator.
9. The rare earth-modified waterborne alkyd antibacterial luminescent coating of claim 1, wherein: the particle size of the solid glass bead is 50-100 nm.
10. The rare earth-modified waterborne alkyd antibacterial luminescent coating of claim 1, wherein: the film-forming assistant is one or a combination of a plurality of alcohol ester dodeca, propylene glycol monobutyl ether and monopropylene glycol methyl ether acetate.
11. The rare earth-modified waterborne alkyd antibacterial luminescent coating of claim 1, wherein: the preparation method of the rare earth modified waterborne alkyd resin comprises the following preparation processes:
a) adding vegetable oil, organic acid anhydride, polyol, dimethylolpropionic acid and dimethylbenzene in sequence according to the weight part of the formula in a multifunctional reaction kettle, and introducing N under the condition of low-speed stirring2To remove O in the reaction kettle2
b) Heating to 105-110 ℃ until reflux, keeping the temperature for 0.5h, removing part of water, quickly heating to 150-160 ℃, fully stirring until the materials are dissolved, stirring at a rotating speed of 200-400 r/min for heat preservation reaction for 1h, then heating to 180 ℃ at a speed of 20 ℃/h for heat preservation reaction for 1h, adding benzoic acid, continuing to carry out heat preservation reaction for 1-1.5 h, heating to 210-220 ℃ at a speed of 20 ℃/h, carrying out heat preservation reaction for 3.0-3.5 h, measuring the acid value and the design value until the acid value and the design value are measured, and separating out water generated by the reaction by using a water separator;
c) cooling to 160 ℃ at a speed of 40 ℃/h, adding carboxylic acid Schiff base, stirring for reaction for 1-1.5 h, then quickly heating to 220-230 ℃, carrying out heat preservation for reaction for 3.0-4.0 h, measuring the acid value every 15-30 min, cooling to 160 ℃ when the acid value reaches a theoretical design value, starting vacuum evaporation to remove solvent xylene, cooling to below 50 ℃, adding a neutralizing agent, quickly stirring and dispersing for 15-20 min, adding deionized water with a formula amount, and continuously stirring for 0.5h until the mixture is uniformly dispersed to obtain the water-based alkyd resin;
d) heating the waterborne alkyd resin to 65-70 ℃, then dripping a rare earth ethanol solution, stirring and reacting for 0.5h, and reacting by using 0.5 mol.L-1Slowly adjusting the pH value of the sodium ethoxide ethanol solution to 7.0-7.5, continuously reacting for 2-2.5 h, and stoppingAnd after reaction, filtering to obtain the rare earth modified waterborne alkyd resin.
CN201910820184.9A 2019-09-01 2019-09-01 Rare earth modified water-based alkyd resin antibacterial luminescent coating Pending CN110591431A (en)

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