CN109053952B - Water-based acrylic resin and application thereof - Google Patents
Water-based acrylic resin and application thereof Download PDFInfo
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- CN109053952B CN109053952B CN201810820286.6A CN201810820286A CN109053952B CN 109053952 B CN109053952 B CN 109053952B CN 201810820286 A CN201810820286 A CN 201810820286A CN 109053952 B CN109053952 B CN 109053952B
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/20—Esters of polyhydric alcohols or phenols, e.g. 2-hydroxyethyl (meth)acrylate or glycerol mono-(meth)acrylate
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/12—Esters of monohydric alcohols or phenols
- C08F220/16—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms
- C08F220/18—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms with acrylic or methacrylic acids
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D143/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and containing boron, silicon, phosphorus, selenium, tellurium, or a metal; Coating compositions based on derivatives of such polymers
- C09D143/04—Homopolymers or copolymers of monomers containing silicon
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/12—Esters of monohydric alcohols or phenols
- C08F220/16—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms
- C08F220/18—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms with acrylic or methacrylic acids
- C08F220/1804—C4-(meth)acrylate, e.g. butyl (meth)acrylate, isobutyl (meth)acrylate or tert-butyl (meth)acrylate
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Abstract
The invention belongs to the field of synthetic resin, and particularly relates to water-based acrylic resin and application thereof. The waterborne acrylic resin provided by the invention is prepared by the following method: a) in the presence of an initiator, carrying out polymerization reaction on a comonomer in an organic solvent to obtain a reaction solution; the comonomer comprises acrylic acid, methyl methacrylate, methacrylic acid, hydroxyethyl acrylate, butyl methacrylate and tertiary carboxylic acid glycidyl ester; b) and neutralizing the reaction solution, and mixing with water to obtain the water-based acrylic resin. The invention successfully solves the problem that the water-based acrylic resin is easy to hydrolyze under alkaline conditions by adopting a plurality of monomers to chemically modify the water-based acrylic resin; the modified water-based acrylic resin also has good ultraviolet resistance, and after the modified water-based acrylic resin is prepared into a coating, the aging degradation of a paint film under the irradiation of ultraviolet rays can be obviously delayed.
Description
Technical Field
The invention belongs to the field of synthetic resin, and particularly relates to water-based acrylic resin and application thereof.
Background
The paint is continuously developed along with the improvement of human civilization, and has a long history. The development of the film-forming material has been made mainly from high molecular polymers synthesized from petrochemicals, and from the use of animal fats and oils and resins secreted from plants, and the like, and people have conducted long-term research. With the progress of society and the continuous improvement of human cognition level, people gradually realize that the emission of Volatile Organic Compounds (VOC) of the traditional solvent-based coating has great destructive effect on the ecological environment of the earth, and meanwhile, the health of human bodies is greatly threatened. Therefore, the development of green environment-friendly coatings is an important direction for the development of the coating industry at present.
Currently, the widely developed green environmentally friendly coatings mainly include water-based coatings, high-solid coatings, powder coatings and radiation curable coatings, wherein the water-based coatings are the leading force of the future coating market and account for more than 40% of the total amount of the world coatings. Like other paints, aqueous paints are also composed of film formers, pigments, solvents and various auxiliaries, except that water is used as the main solvent or dispersion medium.
The water-based acrylic resin has the advantages of no toxicity, no odor, low cost, small pollution and the like, and is widely used as a film forming material of a water-based paint at present, but the traditional water-based acrylic resin has poor alkali resistance and ultraviolet resistance, so that the water-based paint prepared from the water-based acrylic resin is easy to hydrolyze under an alkaline condition, and a paint film formed after the paint is coated has a high degradation and aging speed under ultraviolet irradiation.
Disclosure of Invention
In view of the above, the present invention aims to provide an aqueous acrylic resin and an application thereof, and the aqueous acrylic resin provided by the present invention has good alkali resistance and ultraviolet resistance.
The invention provides a water-based acrylic resin which is prepared by the following method:
a) in the presence of an initiator, carrying out polymerization reaction on a comonomer in an organic solvent to obtain a reaction solution; the comonomer comprises acrylic acid, methyl methacrylate, methacrylic acid, hydroxyethyl acrylate, butyl methacrylate and tertiary carboxylic acid glycidyl ester;
b) and neutralizing the reaction solution, and mixing with water to obtain the water-based acrylic resin.
Preferably, the comonomers comprise, in parts by weight:
preferably, the comonomer further comprises vinyl trimethoxy silane.
Preferably, the content of the vinyltrimethoxysilane in the comonomer is 10-15 parts by weight based on 20-30 parts by weight of the acrylic acid in the comonomer.
Preferably, the initiator comprises one or more of benzoyl peroxide, t-butyl hydroperoxide and azobisisobutyronitrile.
Preferably, the organic solvent comprises one or more of propylene glycol methyl ether, n-butanol and ethylene glycol monobutyl ether.
Preferably, the temperature of the copolymerization reaction is 90-120 ℃; the time of the copolymerization reaction is 3-10 h.
Preferably, in the step b), the reaction solution is neutralized and then mixed with water and an organic solvent to obtain the aqueous acrylic resin.
Preferably, the solid content of the water-based acrylic resin is 40-60 wt%.
The invention provides a coating which comprises the water-based acrylic resin in any one of the technical schemes.
Compared with the prior art, the invention provides the water-based acrylic resin and the application thereof. The waterborne acrylic resin provided by the invention is prepared by the following method: a) in the presence of an initiator, carrying out polymerization reaction on a comonomer in an organic solvent to obtain a reaction solution; the comonomer comprises acrylic acid, methyl methacrylate, methacrylic acid, hydroxyethyl acrylate, butyl methacrylate and tertiary carboxylic acid glycidyl ester; b) and neutralizing the reaction solution, and mixing with water to obtain the water-based acrylic resin. The invention successfully solves the problem that the water-based acrylic resin is easy to hydrolyze under alkaline conditions by adopting a plurality of monomers to chemically modify the water-based acrylic resin; the modified water-based acrylic resin also has good ultraviolet resistance, and after the modified water-based acrylic resin is prepared into a coating, the aging degradation of a paint film under the irradiation of ultraviolet rays can be obviously delayed. In the preferable scheme of the invention, a certain amount of vinyl trimethoxy silane is added during the preparation of the waterborne acrylic resin, so that the adhesive force of the waterborne acrylic resin can be obviously improved, and the waterborne acrylic resin can be well adhered to inorganic substrates, stainless steel, aluminum and other substrates which are difficult to adhere, thereby better protecting the substrates. Experimental results show that after the waterborne acrylic resin provided by the invention is coated to form a film, the film is not hydrolyzed after being soaked in a saturated NaOH solution (25 ℃) for 1h, and the film is not foamed, cracked or peeled after an artificial aging test (GB/T1865) for 600 h, and a lattice test (GB/T9286) can reach grade 1.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a water-based acrylic resin which is prepared by the following method:
a) in the presence of an initiator, carrying out polymerization reaction on a comonomer in an organic solvent to obtain a reaction solution; the comonomer comprises acrylic acid, methyl methacrylate, methacrylic acid, hydroxyethyl acrylate, butyl methacrylate and tertiary carboxylic acid glycidyl ester;
b) and neutralizing the reaction solution, and mixing with water to obtain the water-based acrylic resin.
In the present invention, a comonomer is first subjected to a polymerization reaction in an organic solvent in the presence of an initiator to obtain a reaction solution. Wherein the copolymerized units comprise acrylic acid, methyl methacrylate, methacrylic acid, hydroxyethyl acrylate, butyl methacrylate and glycidyl versatate; the content of the acrylic acid in the comonomer is preferably 20-30 parts by weight, and specifically can be 20 parts by weight, 21 parts by weight, 22 parts by weight, 23 parts by weight, 24 parts by weight, 25 parts by weight, 26 parts by weight, 27 parts by weight, 28 parts by weight, 29 parts by weight or 30 parts by weight; the content of the methyl methacrylate in the comonomer is preferably 30-40 parts by weight, and specifically can be 30 parts by weight, 31 parts by weight, 32 parts by weight, 33 parts by weight, 34 parts by weight, 35 parts by weight, 36 parts by weight, 37 parts by weight, 38 parts by weight, 39 parts by weight or 40 parts by weight; the content of the methacrylic acid in the comonomer is preferably 25-30 parts by weight, and specifically can be 25 parts by weight, 26 parts by weight, 27 parts by weight, 28 parts by weight, 29 parts by weight or 30 parts by weight; the content of the hydroxyethyl acrylate in the comonomer is preferably 45-50 parts by weight, and specifically can be 45 parts by weight, 46 parts by weight, 47 parts by weight, 48 parts by weight, 49 parts by weight or 50 parts by weight; the content of the butyl methacrylate in the comonomer is preferably 45-50 parts by weight, and specifically can be 45 parts by weight, 46 parts by weight, 47 parts by weight, 48 parts by weight, 49 parts by weight or 50 parts by weight; the content of the tertiary carbonic acid glycidyl ester in the comonomer is preferably 2-8 parts by weight, and specifically can be 2 parts by weight, 3 parts by weight, 4 parts by weight, 5 parts by weight, 6 parts by weight, 7 parts by weight or 8 parts by weight. In the present invention, the comonomer preferably further comprises vinyltrimethoxysilane, and the content of the vinyltrimethoxysilane in the comonomer is preferably 10 to 15 parts by weight, specifically 10 parts by weight, 11 parts by weight, 12 parts by weight, 13 parts by weight, 14 parts by weight or 15 parts by weight, based on 20 to 30 parts by weight of the acrylic acid in the comonomer.
In the present invention, the initiator includes, but is not limited to, one or more of benzoyl oxide, t-butyl hydroperoxide, and azobisisobutyronitrile; the initial content of the initiator in the reaction system is preferably 2 to 8 parts by weight, specifically 2 parts by weight, 3 parts by weight, 4 parts by weight, 5 parts by weight, 6 parts by weight, 7 parts by weight, or 8 parts by weight, based on 20 to 30 parts by weight of the initial content of the acrylic acid in the reaction system. In the present invention, the organic solvent includes, but is not limited to, one or more of propylene glycol methyl ether, n-butanol, and ethylene glycol monobutyl ether; the content of the organic solvent in the reaction system is preferably 50 to 80 parts by weight, specifically 50 parts by weight, 55 parts by weight, 60 parts by weight, 65 parts by weight, 70 parts by weight, 75 parts by weight, or 80 parts by weight, based on 20 to 30 parts by weight of the initial content of the acrylic acid in the reaction system.
In the invention, the temperature of the comonomer for polymerization is preferably 90-120 ℃, and specifically can be 90 ℃, 95 ℃, 100 ℃, 105 ℃, 110 ℃, 115 ℃ or 120 ℃; the time of the copolymerization reaction is preferably 3-10 h, and specifically can be 3h, 3.5h, 4h, 4.5h, 5h, 5.5h, 6h, 6.5h, 7h, 7.5h, 8h, 8.5h, 9h, 9.5h or 10 h.
In the present invention, the polymerization reaction is preferably carried out in the following manner:
a1) mixing a comonomer with an initiator to obtain a mixture to be reacted;
a2) heating an organic solvent to a reaction temperature, adding a part of the mixture to be reacted into the heated organic solvent, and carrying out pre-reaction to obtain a pre-reaction solution;
a3) and dropwise adding the rest of the mixture to be reacted into the pre-reaction liquid, and carrying out heat preservation reaction to obtain a reaction liquid.
In the above-mentioned polymerization reaction mode provided by the present invention, the mass ratio of a part of the mixture to be reacted and the rest of the mixture to be reacted is preferably 40: (100 to 200), more preferably 40: (130-190), specifically 40:139, 40:176 or 40: 180. In the step a2), the pre-reaction time is preferably 15-90 min, and specifically may be 15min, 30min, 45min, 60min, 75min or 90 min. In the step a3), the dripping time is preferably 1-3 h, and specifically can be 1h, 1.5h, 2h, 2.5h or 3 h. In the step a3), the time of the heat preservation reaction is preferably 2-6 h, and specifically can be 2h, 3h, 4h, 5h or 6 h. In the step a3), preferably, adding a proper amount of initiator and organic solvent into the reaction system in the heat preservation reaction process, wherein the adding time is preferably half of the time of the heat preservation reaction; the addition amount of the initiator is preferably 0.2-1 part by weight, specifically 0.2 part by weight, 0.4 part by weight, 0.6 part by weight, 0.8 part by weight or 1 part by weight, based on 20-30 parts by weight of the acrylic acid used in the reaction; the addition amount of the organic solvent is preferably 15 to 40 parts by weight, specifically 15 parts by weight, 20 parts by weight, 25 parts by weight, 30 parts by weight, 35 parts by weight or 40 parts by weight, based on 20 to 30 parts by weight of the acrylic acid used in the reaction.
And after the reaction solution is obtained, neutralizing the reaction solution. The reagent used for neutralization is preferably organic amine and/or ammonia water, and the organic amine is preferably N-N dimethylethanolamine; the neutralization is preferably carried out at 50-80 ℃, and specifically can be at 50 ℃, 55 ℃, 60 ℃, 65 ℃, 70 ℃, 75 ℃ or 80 ℃. And after the neutralization is finished, mixing the neutralized product with a certain amount of water based on the required solid content to obtain the water-based acrylic resin with the required solid content. In the present invention, the neutralized product may be mixed with water and an organic solvent in addition to pure water to obtain an aqueous acrylic resin having a desired solid content. In the invention, the solid content of the water-based acrylic resin is preferably 40-60 wt%, and specifically can be 40 wt%, 45 wt%, 50 wt%, 55 wt% or 60 wt%.
The invention successfully solves the problem that the water-based acrylic resin is easy to hydrolyze under alkaline conditions by adopting a plurality of monomers to chemically modify the water-based acrylic resin; the modified water-based acrylic resin also has good ultraviolet resistance, and after the modified water-based acrylic resin is prepared into a coating, the aging degradation of a paint film under the irradiation of ultraviolet rays can be obviously delayed.
In the preferable scheme of the invention, a certain amount of vinyl trimethoxy silane is added during the preparation of the waterborne acrylic resin, so that the adhesive force of the waterborne acrylic resin can be obviously improved, and the waterborne acrylic resin can be well adhered to inorganic substrates, stainless steel, aluminum and other substrates which are difficult to adhere, thereby better protecting the substrates.
Experimental results show that after the waterborne acrylic resin provided by the invention is coated to form a film, the film is not hydrolyzed after being soaked in a saturated NaOH solution (25 ℃) for 1h, and the film is not foamed, cracked or peeled after an artificial aging test (GB/T1865) for 600 h, and a lattice test (GB/T9286) can reach grade 1.
The invention also provides a coating, which comprises the water-based acrylic resin in the technical scheme. In one embodiment provided by the present invention, the coating comprises the aqueous acrylic resin, pigment and filler, water and amino resin, wherein the pigment and filler includes but is not limited to titanium dioxide, and the amino resin includes but is not limited to 325 amino resin. In an embodiment that the coating provided by the present invention includes the aqueous acrylic resin, the pigment and filler, water, and the amino resin, the content of the pigment and filler in the coating is 20 to 30 parts by weight, specifically 20 parts by weight, 21 parts by weight, 22 parts by weight, 23 parts by weight, 24 parts by weight, 25 parts by weight, 26 parts by weight, 27 parts by weight, 28 parts by weight, 29 parts by weight, or 30 parts by weight, based on 50 parts by weight of the aqueous acrylic resin in the coating; the content of the water in the coating is 15-25 parts by weight, and specifically can be 15 parts by weight, 16 parts by weight, 17 parts by weight, 18 parts by weight, 19 parts by weight, 20 parts by weight, 21 parts by weight, 22 parts by weight, 23 parts by weight, 24 parts by weight or 25 parts by weight; the content of the amino resin in the coating is 5-10 parts by weight, and specifically can be 5 parts by weight, 6 parts by weight, 7 parts by weight, 8 parts by weight, 9 parts by weight or 10 parts by weight.
In one embodiment provided by the invention, the coating further comprises an antifoaming agent, wherein the grade of the antifoaming agent includes, but is not limited to, BYK-037, and the content of the antifoaming agent in the coating is 0.1 to 0.5 parts by weight, specifically 0.1 part by weight, 0.2 part by weight, 0.3 part by weight, 0.4 part by weight or 0.5 part by weight, based on 50 parts by weight of the aqueous acrylic resin in the coating.
In an embodiment provided by the present invention, the coating further includes a leveling agent, where the number of the leveling agent includes, but is not limited to, BYK-390, and the content of the leveling agent in the coating is 0.1 to 0.5 parts by weight, specifically 0.1 part by weight, 0.2 part by weight, 0.3 part by weight, 0.4 part by weight, or 0.5 part by weight, based on 50 parts by weight of the aqueous acrylic resin in the coating.
In one embodiment provided by the invention, the coating further comprises a dispersant, wherein the dispersant is available under the brand name including but not limited to Henkel-5040, and the content of the dispersant in the coating is 0.1-0.5 part by weight, specifically 0.1 part by weight, 0.2 part by weight, 0.3 part by weight, 0.4 part by weight or 0.5 part by weight based on 50 parts by weight of the content of the aqueous acrylic resin in the coating.
In an embodiment provided by the invention, the paint further comprises color paste, wherein the color paste comprises but is not limited to phthalocyanine blue color paste, and the content of the color paste in the paint is 1-5 parts by weight, specifically 1 part by weight, 2 parts by weight, 3 parts by weight, 4 parts by weight or 5 parts by weight, based on 50 parts by weight of the aqueous acrylic resin in the paint.
The coating provided by the invention contains the water-based acrylic resin, so that the coating also has good alkali resistance and ultraviolet resistance.
For the sake of clarity, the following examples are given in detail.
Example 1
20g of acrylic acid, 30g of methyl methacrylate, 25g of methacrylic acid, 45g of hydroxyethyl acrylate, 45g of butyl methacrylate, 10g of vinyltrimethoxysilane, 2g of benzoyl peroxide and 2g of glycidyl versatate were mixed and stirred uniformly to obtain a mixture. 50g of propylene glycol methyl ether is put into a four-neck flask, the temperature is raised to 95 ℃, 40g of the mixture is added, and pre-reaction is carried out for 30min at the temperature of 95 ℃. Dropwise adding the rest of the mixture after 2.5 h; after the dropwise addition, the reaction is carried out for 2 hours under the condition of heat preservation; adding 0.4g of benzoyl peroxide and 20g of propylene glycol methyl ether, and keeping the temperature for reaction for 2 hours (the reaction temperature is 95 ℃ all the time); measuring the acid value, wherein the acid value is about 50, cooling to 65 ℃, and neutralizing with calculated amount of N-N dimethylethanolamine; finally, adding a certain amount of water and propylene glycol methyl ether to dilute the neutralized product to obtain the water-based acrylic resin (the solid content is 50 wt%, and the content of propylene glycol methyl ether is 5 wt%).
Example 2
25g of acrylic acid, 35g of methyl methacrylate, 30g of methacrylic acid, 50g of hydroxyethyl acrylate, 48g of butyl methacrylate, 15g of vinyltrimethoxysilane, 5g of benzoyl peroxide and 8g of glycidyl versatate were mixed and stirred uniformly to obtain a mixture. 80g of propylene glycol methyl ether is put into a four-neck flask, the temperature is raised to 100 ℃, 40g of the mixture is added, and pre-reaction is carried out for 45min at 100 ℃. Dropwise adding the rest mixture for 2 h; after the dropwise addition, the reaction is carried out for 2 hours under the condition of heat preservation; adding 0.6g of benzoyl peroxide and 25g of propylene glycol methyl ether, and keeping the temperature for reaction for 2 hours (the reaction temperature is always 100 ℃); measuring the acid value, wherein the acid value is about 50, cooling to 65 ℃, and neutralizing with calculated amount of N-N dimethylethanolamine; finally, adding a certain amount of water and propylene glycol methyl ether to dilute the neutralized product to obtain the water-based acrylic resin (the solid content is 50 wt%, and the content of propylene glycol methyl ether is 5 wt%).
Example 3
30g of acrylic acid, 40g of methyl methacrylate, 28g of methacrylic acid, 47g of hydroxyethyl acrylate, 50g of butyl methacrylate, 12g of vinyltrimethoxysilane, 8g of benzoyl peroxide and 5g of glycidyl versatate were mixed and stirred uniformly to obtain a mixture. 100g of propylene glycol methyl ether is put into a four-neck flask, the temperature is raised to 105 ℃, 40g of the mixture is added, and pre-reaction is carried out for 60min at 105 ℃. The rest of the mixture is added dropwise within 1.5 h; after the dropwise addition, the reaction is carried out for 2 hours under the condition of heat preservation; adding 0.8g of benzoyl peroxide and 30g of propylene glycol methyl ether, and keeping the temperature for reaction for 2 hours (the reaction temperature is 105 ℃ all the time); measuring the acid value, wherein the acid value is about 50, cooling to 65 ℃, and neutralizing with calculated amount of N-N dimethylethanolamine; finally, adding a certain amount of water and propylene glycol methyl ether to dilute the neutralized product to obtain the water-based acrylic resin (the solid content is 50 wt%, and the content of propylene glycol methyl ether is 5 wt%).
Example 4
Performance testing
The water-based acrylic resin prepared in the examples 1-3 is blended into a finish paint, and the formula of the finish paint is shown in the following table 1:
table 1 top coat formulation table
| Name (R) | Specification of | Dosage (g) |
| Water-based acrylic resin | Self-made | 50 |
| Titanium white powder | RX-326 rutile titanium dioxide | 25 |
| Water (W) | Industrial grade | 18 |
| 325 amino resin | Chemical engineering of cyanogen | 7 |
| Defoaming agent | BYK-037 | 0.3 |
| Leveling agent | BYK-390 | 0.2 |
| Dispersing agent | Henkel-5040 | 0.2 |
| Phthalocyanine blue color paste | Tianjin ZhengzhengZhonghonghua chemical industry Co., Ltd | 2 |
The performance of the prepared finish paint was tested, and the results are shown in table 2:
table 2 aqueous acrylic topcoat performance test data table
In the above table, the specific detection process of the enterprise standard (thermal storage stability) is as follows: and (3) putting 0.5L of the sample into a suitable plastic or glass container, reserving about 10% of space in the bottle, sealing, putting into a constant-temperature drying oven at (50 +/-2) DEG C, taking out after 7 days, putting for 3 hours at (23 +/-2) DEG C, and if the sample is uniformly stirred and has no hard blocks, determining that the sample is 'no abnormal'.
As can be seen from the performance tests, the waterborne acrylic resin provided in the embodiments 1 to 3 has good alkali resistance, artificial aging resistance and adhesive force.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (9)
1. The water-based acrylic resin is prepared by the following steps:
a) in the presence of an initiator, carrying out polymerization reaction on a comonomer in an organic solvent to obtain a reaction solution;
the comonomer comprises the following components in parts by weight:
b) and neutralizing the reaction solution, and mixing with water to obtain the water-based acrylic resin.
2. The aqueous acrylic resin of claim 1 further comprising vinyltrimethoxysilane.
3. The aqueous acrylic resin according to claim 2, wherein the vinyltrimethoxysilane is contained in the comonomer in an amount of 10 to 15 parts by weight based on 20 to 30 parts by weight of the acrylic acid in the comonomer.
4. The aqueous acrylic resin of claim 1 wherein the initiator comprises one or more of benzoyl peroxide, t-butyl hydroperoxide, and azobisisobutyronitrile.
5. The aqueous acrylic resin as claimed in claim 1, wherein the organic solvent comprises one or more of propylene glycol methyl ether, n-butanol and ethylene glycol monobutyl ether.
6. The water-based acrylic resin as claimed in claim 1, wherein the temperature of the copolymerization reaction is 90-120 ℃; the time of the copolymerization reaction is 3-10 h.
7. The aqueous acrylic resin according to claim 1, wherein the reaction solution is neutralized and then mixed with water and an organic solvent to obtain an aqueous acrylic resin in step b).
8. The aqueous acrylic resin as claimed in claim 1, wherein the solid content of the aqueous acrylic resin is 40 to 60 wt%.
9. A paint comprising the aqueous acrylic resin according to any one of claims 1 to 8.
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| CN109796555B (en) * | 2019-01-08 | 2021-08-06 | 江西省科学院应用化学研究所 | Preparation method of high-performance water-based acrylic resin |
| CN111691218B (en) * | 2020-05-22 | 2022-04-22 | 仙鹤股份有限公司 | Preparation method of high-performance release paper |
| CN111690293A (en) * | 2020-05-27 | 2020-09-22 | 鹤山市科鼎功能材料有限公司 | Resin for washable glass temporary protection ink and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101121770A (en) * | 2006-08-11 | 2008-02-13 | 上海市涂料研究所 | Water acrylic resin and preparing method thereof |
| CN103772597A (en) * | 2014-01-26 | 2014-05-07 | 浙江环达漆业集团有限公司 | Preparation method of organosilicone modified hydroxy acrylic resin aqueous dispersion |
| CN105330784A (en) * | 2014-08-01 | 2016-02-17 | 阜阳师范学院 | Method for preparing waterborne acrylic resin |
| CN107216761A (en) * | 2017-07-17 | 2017-09-29 | 江苏三木化工股份有限公司 | The preparation method of the water soluble acrylic resin of high solid |
-
2018
- 2018-07-24 CN CN201810820286.6A patent/CN109053952B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101121770A (en) * | 2006-08-11 | 2008-02-13 | 上海市涂料研究所 | Water acrylic resin and preparing method thereof |
| CN103772597A (en) * | 2014-01-26 | 2014-05-07 | 浙江环达漆业集团有限公司 | Preparation method of organosilicone modified hydroxy acrylic resin aqueous dispersion |
| CN105330784A (en) * | 2014-08-01 | 2016-02-17 | 阜阳师范学院 | Method for preparing waterborne acrylic resin |
| CN107216761A (en) * | 2017-07-17 | 2017-09-29 | 江苏三木化工股份有限公司 | The preparation method of the water soluble acrylic resin of high solid |
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