CN114891411A - Water-soluble polyacrylic acid finish paint, and preparation method and application thereof - Google Patents
Water-soluble polyacrylic acid finish paint, and preparation method and application thereof Download PDFInfo
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- CN114891411A CN114891411A CN202210733985.3A CN202210733985A CN114891411A CN 114891411 A CN114891411 A CN 114891411A CN 202210733985 A CN202210733985 A CN 202210733985A CN 114891411 A CN114891411 A CN 114891411A
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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
- C09D133/00—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 at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
- C09D133/04—Homopolymers or copolymers of esters
- C09D133/14—Homopolymers or copolymers of esters of esters containing halogen, nitrogen, sulfur or oxygen atoms in addition to the carboxy oxygen
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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
- C08F220/14—Methyl esters, e.g. methyl (meth)acrylate
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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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/63—Additives non-macromolecular organic
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Abstract
The invention provides a water-soluble polyacrylic acid finish paint and a preparation method and application thereof, and relates to the technical field of water-based paint. The water-soluble polyacrylic acid finish paint is mainly prepared by compounding cationic polyacrylic acid resin and a curing agent. Wherein the curing agent comprises at least one of aminosilane, tetra (2-methoxyethoxy) silane and methyltriethoxysilane. The cationic polyacrylic resin and the curing agent in the water-soluble polyacrylic acid finish paint have good crosslinking performance, and the prepared water-soluble polyacrylic acid finish paint has the advantages of high gloss, high hardness and high stain resistance through detection. The water-soluble polyacrylic acid finish paint can be widely applied to the preparation process of wood finish paint.
Description
Technical Field
The invention relates to the technical field of water-based coatings, and particularly relates to a water-soluble polyacrylic acid finish coat, and a preparation method and application thereof.
Background
The water-soluble polyacrylic acid coating is one of the directions of environment-friendly coatings, and represents the development direction of the future coating industry. In recent years, aqueous industrial coatings have been developed more rapidly in the field of industrial coating, as a result of the compliance with environmental regulations. However, most of the cationic resins for preparing water-soluble polyacrylic acid in the current market are emulsion type acrylic resins, which are characterized in that the crosslinking density is not compact enough, the compatibility between the wood lacquer and the surface is poor, and the performance of the emulsion type cationic resins is obviously insufficient relative to the anionic emulsion, so that the current market has less cationic resins, and the market demand cannot be met. Meanwhile, the compatibility of the curing agent used for preparing the existing water-soluble polyacrylic acid and cationic polyacrylic resin is poor, and the prepared surface coating has unsatisfactory glossiness, hardness and stain resistance.
Therefore, it is necessary and urgent to develop a water-soluble polyacrylic acid finish paint which has the advantages of high gloss, high hardness, high stain resistance, and good compatibility of the curing agent and the cationic polyacrylic acid resin.
In view of the above, the present invention is particularly proposed.
Disclosure of Invention
The first purpose of the invention is to provide a water-soluble polyacrylic acid finish coat, wherein the cationic polyacrylic acid resin and the curing agent in the water-soluble polyacrylic acid finish coat have good crosslinking property; meanwhile, through detection, the water-soluble polyacrylic acid finish paint has the advantages of high gloss, high hardness and high stain resistance.
The second purpose of the invention is to provide a preparation method of the water-soluble polyacrylic acid finish paint.
The third purpose of the invention is to provide an application of the water-soluble polyacrylic acid finish paint, and the water-soluble polyacrylic acid finish paint can be widely applied to the preparation process of the wood finish paint.
In order to achieve the above purpose of the present invention, the following technical solutions are adopted:
the invention provides a water-soluble polyacrylic acid finish coat, which is mainly prepared by compounding cationic polyacrylic acid resin and a curing agent;
the curing agent comprises at least one of aminosilane, tetra (2-methoxyethoxy) silane and methyltriethoxysilane.
Further, the cationic polyacrylic resin is mainly obtained by polymerizing an acrylic mixed monomer under the action of a diluting solvent and an initiator;
the diluting solvent comprises propylene glycol methyl ether, isopropanol and a reaction type solvent, wherein the reaction type solvent is mainly synthesized from dibasic acid and tert-carbonic acid glycidyl ester.
Further, the preparation method of the reactive solvent comprises the following steps:
uniformly mixing dibasic acid and tertiary carbonic acid glycidyl ester, and opening ring reaction at 155-165 ℃ for 3.5-4.5 h;
preferably, the ring-opening reaction is carried out in a protective gas atmosphere, and the protective gas is nitrogen;
preferably, the dibasic acid comprises at least one of adipic acid, isophthalic acid, and n-dodecanedioic acid.
Preferably, the mass ratio of the dibasic acid to the tertiary carbonic acid glycidyl ester is 0.8-1: 1 to 1.3, preferably 1: 1.
further, the acrylic mixed monomer comprises at least one of butyl methacrylate, isooctyl acrylate, methyl methacrylate, hydroxyethyl methacrylate and dimethylaminoethyl methacrylate;
preferably, the initiator comprises at least one of benzoyl peroxide, t-butyl hydroperoxide, di-t-amyl peroxide, hydrogen peroxide and di-t-butyl hydroperoxide, preferably benzoyl peroxide.
Further, the polymerization raw materials of the cationic polyacrylic resin also comprise a neutralizing agent, a chain transfer agent and deionized water.
Further, the neutralizing agent comprises at least one of lactic acid, glacial acetic acid, hydrochloric acid, oxalic acid and phosphoric acid, preferably glacial acetic acid;
preferably, the chain transfer agent comprises at least one of dodecyl mercaptan, mercaptoethanol, isooctyl 3-mercaptopropionate, 2, 4-diphenyl-4-methyl-1-pentene, and linear dimer of alpha-methylstyrene, preferably dodecyl mercaptan.
Further, the cationic polyacrylic resin comprises the following polymerization raw materials in parts by weight:
30-35 parts of propylene glycol methyl ether, 30-35 parts of isopropanol, 60-120 parts of a reactive solvent, 96-98 parts of butyl methacrylate, 50-55 parts of isooctyl acrylate, 140-145 parts of methyl methacrylate, 50-55 parts of hydroxyethyl methacrylate, 80-85 parts of dimethylaminoethyl methacrylate, 12-15 parts of dodecyl mercaptan, 4-5 parts of benzoyl peroxide, 32-35 parts of glacial acetic acid and 152-155 parts of deionized water;
preferably, the curing agent comprises the following components in parts by weight:
40-45 parts of aminosilane, 65-70 parts of tetra (2-methoxyethoxy) silane and 45-95 parts of methyltriethoxysilane;
preferably, the compounding molar ratio of the cationic polyacrylic resin to the curing agent is 0.8-1: 1 to 1.25, preferably 1: 1.
the invention provides a preparation method of the water-soluble polyacrylic acid finish paint, which comprises the following steps:
weighing polymerization raw materials for preparing cationic polyacrylic resin, and carrying out polymerization reaction to obtain cationic polyacrylic resin; and then uniformly mixing the cationic polyacrylic resin and a curing agent to obtain the water-soluble polyacrylic acid finish paint.
Further, the preparation method comprises the following steps:
(a) uniformly mixing propylene glycol methyl ether, isopropanol and a reaction type solvent to prepare a diluting solvent;
(b) dripping an acrylic acid mixed monomer and a chain transfer agent into a diluent solvent for polymerization reaction for 3 hours at the temperature of 110 ℃, and then preserving heat for 2 hours at the temperature of 110 ℃ to obtain an intermediate A;
(c) sequentially adding the intermediate A into a neutralizing agent and deionized water at 80 ℃ and uniformly mixing to obtain cationic polyacrylic resin;
(d) and mixing the cationic polyacrylic resin and a curing agent according to the ratio of the cross-linking functional group 1: 1 to obtain the water-soluble polyacrylic acid finish paint.
The invention provides an application of the water-soluble polyacrylic acid finish paint in preparation of woodware finish paint.
Compared with the prior art, the invention has the beneficial effects that:
the water-soluble polyacrylic acid finish paint provided by the invention is mainly prepared by compounding cationic polyacrylic acid resin and a curing agent. Wherein the curing agent comprises at least one of aminosilane, tetra (2-methoxyethoxy) silane and methyltriethoxysilane. The cationic polyacrylic resin and the curing agent in the water-soluble polyacrylic acid finish paint have good crosslinking performance, and the prepared water-soluble polyacrylic acid finish paint has the advantages of high gloss, high hardness and high stain resistance through detection.
The preparation method of the water-soluble polyacrylic acid finish paint comprises the steps of firstly weighing polymerization raw materials for preparing cationic polyacrylic acid resin, and carrying out polymerization reaction to obtain cationic polyacrylic acid resin; and then uniformly mixing the cationic polyacrylic resin and a curing agent to obtain the water-soluble polyacrylic acid finish paint. The preparation method has the advantages of simple preparation process and easy operation.
The water-soluble polyacrylic acid finish paint provided by the invention can be widely applied to the preparation process of wood finish paint.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all, embodiments of the present invention. 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.
According to one aspect of the invention, the water-soluble polyacrylic acid finishing coat is mainly prepared by compounding cationic polyacrylic acid resin and a curing agent;
the curing agent comprises at least one of aminosilane, tetra (2-methoxyethoxy) silane and methyltriethoxysilane.
The water-soluble polyacrylic acid finish paint provided by the invention is mainly prepared by compounding cationic polyacrylic acid resin and a curing agent. Wherein the curing agent comprises at least one of aminosilane, tetra (2-methoxyethoxy) silane and methyltriethoxysilane. The cationic polyacrylic resin and the curing agent in the water-soluble polyacrylic acid finish paint have good crosslinking performance, and the prepared water-soluble polyacrylic acid finish paint has the advantages of high gloss, high hardness and high stain resistance through detection.
In a preferred embodiment of the invention, the cationic polyacrylic resin is mainly obtained by polymerizing an acrylic mixed monomer under the action of a diluting solvent and an initiator;
the diluting solvent comprises propylene glycol methyl ether, isopropanol and a reaction type solvent, wherein the reaction type solvent is mainly synthesized from dibasic acid and tert-carbonic acid glycidyl ester.
As a preferred embodiment, the chain-type high molecular polymer water-soluble cationic polyacrylic resin synthesized by the above method of radical polymerization is characterized by high solid content and low viscosity, and the amount of crosslinking functional groups of the cationic resin is increased by synthesizing a reactive solvent intermediate, thereby reducing the viscosity of the system in the synthesis process. Meanwhile, the addition of the reactive solvent in the diluting solvent can effectively improve the crosslinking functional group, increase the crosslinking density and improve the compactness of the water-soluble polyacrylic acid finish paint.
In addition, the reactive solvent synthesized by the dibasic acid and the tertiary carboxylic acid glycidyl ester can effectively improve the solid content of the cationic polyacrylic resin and reduce the VOC content; meanwhile, the reactive solvent can also provide more hydroxyl functional groups, so that the crosslinking density of the cationic polyacrylic resin during polymerization is improved.
In a preferred embodiment of the present invention, the method for preparing the reactive solvent comprises:
uniformly mixing dibasic acid and tertiary carbonic acid glycidyl ester, and opening ring reaction at 155-165 ℃ for 3.5-4.5 h;
preferably, the ring-opening reaction is carried out in a protective gas atmosphere, and the protective gas is nitrogen;
preferably, the dibasic acid comprises at least one of adipic acid, isophthalic acid, and n-dodecanedioic acid.
Preferably, the mass ratio of the dibasic acid to the tertiary carbonic acid glycidyl ester is 0.8-1: 1 to 1.3, preferably 1: 1.
as a preferred embodiment, the method for preparing the reactive solvent comprises: adding dibasic acid and tertiary carbonic acid glycidyl ester into a four-neck flask provided with a thermometer, a stirring device, a heating device and a condensing device, introducing nitrogen for protection, stirring and heating to 160 ℃; the exothermic reaction started at about 140-150 ℃ and was continued for 4h at 160 ℃ to obtain a clear pale yellow liquid.
In a preferred embodiment of the present invention, the acrylic mixed monomer includes at least one of butyl methacrylate, isooctyl acrylate, methyl methacrylate, hydroxyethyl methacrylate, dimethylaminoethyl methacrylate;
in a preferred embodiment of the present invention, the initiator comprises at least one of benzoyl peroxide, t-butyl hydroperoxide, di-t-amyl peroxide, hydrogen peroxide and di-t-butyl hydroperoxide, preferably benzoyl peroxide.
In a preferred embodiment of the present invention, the polymerization raw material of the cationic polyacrylic resin further comprises a neutralizing agent, a chain transfer agent and deionized water.
In a preferred embodiment of the present invention, the neutralizing agent comprises at least one of lactic acid, glacial acetic acid, hydrochloric acid, oxalic acid and phosphoric acid, preferably glacial acetic acid;
preferably, as a preferred embodiment, the glacial acetic acid is added as a neutralizing agent, which can effectively neutralize the alkali salt-forming water transfer of dimethylaminoethyl methacrylate in the acrylic acid mixed monomer.
In a preferred embodiment of the present invention, the chain transfer agent comprises at least one of dodecyl mercaptan, mercaptoethanol, isooctyl 3-mercaptopropionate, 2, 4-diphenyl-4-methyl-1-pentene, and linear dimer of α -methylstyrene, preferably dodecyl mercaptan.
In a preferred embodiment, the dodecyl mercaptan is used as a chain transfer agent to adjust the molecular weight of the cationic polyacrylic resin during polymerization, thereby synthesizing a chain-type high-molecular polymer.
In a preferred embodiment of the present invention, the polymerization raw material of the cationic polyacrylic resin comprises, in parts by mass:
30-35 parts of propylene glycol methyl ether, 30-35 parts of isopropanol, 60-120 parts of a reactive solvent, 96-98 parts of butyl methacrylate, 50-55 parts of isooctyl acrylate, 140-145 parts of methyl methacrylate, 50-55 parts of hydroxyethyl methacrylate, 80-85 parts of dimethylaminoethyl methacrylate, 12-15 parts of dodecyl mercaptan, 4-5 parts of benzoyl peroxide, 32-35 parts of glacial acetic acid and 152-155 parts of deionized water;
preferably, the curing agent comprises the following components in parts by weight:
40-45 parts of aminosilane, 65-70 parts of tetra (2-methoxyethoxy) silane and 45-95 parts of methyltriethoxysilane;
in a preferred embodiment of the invention, the compounding molar ratio of the cationic polyacrylic resin to the curing agent is 0.8-1: 1 to 1.25, preferably 1: 1.
according to one aspect of the invention, the preparation method of the water-soluble polyacrylic acid finish paint comprises the following steps:
weighing polymerization raw materials for preparing cationic polyacrylic resin, and carrying out polymerization reaction to obtain cationic polyacrylic resin; and then uniformly mixing the cationic polyacrylic resin and a curing agent to obtain the water-soluble polyacrylic acid finish paint.
The invention provides a preparation method of water-soluble polyacrylic acid finish paint, which comprises the steps of firstly weighing polymerization raw materials for preparing cationic polyacrylic acid resin, and carrying out polymerization reaction to obtain the cationic polyacrylic acid resin; and then uniformly mixing the cationic polyacrylic resin and a curing agent to obtain the water-soluble polyacrylic acid finish paint. The preparation method has the advantages of simple preparation process and easy operation.
In a preferred embodiment of the present invention, the preparation method comprises the steps of:
(a) uniformly mixing propylene glycol methyl ether, isopropanol and a reaction type solvent to prepare a diluting solvent;
(b) dripping an acrylic acid mixed monomer and a chain transfer agent into a diluent solvent for polymerization reaction for 3 hours at the temperature of 110 ℃, and then preserving heat for 2 hours at the temperature of 110 ℃ to obtain an intermediate A;
(c) sequentially adding the intermediate A into a neutralizing agent and deionized water at 80 ℃ and uniformly mixing to obtain cationic polyacrylic resin;
(d) and mixing the cationic polyacrylic resin and a curing agent according to the ratio of the cross-linking functional group 1: 1 to obtain the water-soluble polyacrylic acid finish paint.
According to one aspect of the invention, the water-soluble polyacrylic acid finish paint is used for preparing woodware finish paint.
The water-soluble polyacrylic acid finish paint provided by the invention can be widely applied to the preparation process of wood finish paint.
The technical solution of the present invention will be further described with reference to the following examples.
Example 1
A water-soluble polyacrylic acid finish paint comprises the following raw materials:
1. reaction type solvent:
| numbering | Name of raw materials | Weight (g) |
| 1 | Adipic acid | 30 |
| 2 | Tertiary carboxylic acid glycidyl ester | 30 |
2. Cationic resin synthesis:
preparing a curing agent:
the preparation method of the water-soluble polyacrylic acid finish paint comprises the following steps:
(1) adding adipic acid and tert-carbonic acid glycidyl ester into a four-neck flask provided with a thermometer, a stirring device, a heating device and a condensing device, introducing nitrogen for protection, stirring and heating to 160 ℃; beginning to release heat at about 140-150 ℃, and continuing to react for 4 hours at 160 ℃ to obtain transparent pale yellow liquid, namely a reaction type solvent;
(2) uniformly mixing propylene glycol methyl ether, isopropanol and a reaction type solvent to prepare a diluting solvent; dripping an acrylic acid mixed monomer and a chain transfer agent into a diluent solvent for polymerization reaction for 3 hours at the temperature of 110 ℃, and then preserving heat for 2 hours at the temperature of 110 ℃ to obtain an intermediate A;
(3) sequentially adding the intermediate A into glacial acetic acid and deionized water at 80 ℃ and uniformly mixing to obtain cationic polyacrylic resin;
(4) and mixing the cationic polyacrylic resin and a curing agent according to the ratio of the cross-linking functional group 1: 1 to obtain the water-soluble polyacrylic acid finish paint.
Example 2
A water-soluble polyacrylic acid finish paint comprises the following raw materials:
1. reaction type solvent:
| numbering | Name of raw materials | Weight (g) |
| 1 | Adipic acid | 60 |
| 2 | Tertiary carboxylic acid glycidyl ester | 60 |
2. Cationic resin synthesis:
preparing a curing agent:
the preparation method of the water-soluble polyacrylic acid finish paint is the same as that of the example 1.
Example 3
A water-soluble polyacrylic acid finish paint comprises the following raw materials:
1. reaction type solvent:
2. cationic resin synthesis:
preparing a curing agent:
the preparation method of the water-soluble polyacrylic acid finish paint is the same as that of the example 1.
Example 4
The reaction type solvent of the present example is:
| numbering | Name of raw materials | Weight (g) |
| 1 | Isophthalic acid | 30 |
| 2 | Tertiary carboxylic acid glycidyl ester | 30 |
Namely, the same procedure as in example 3 was repeated except that 60g of the reactive solvent was used as the raw material for synthesizing the cationic resin.
Example 5
The reaction type solvent in this example is:
| numbering | Name of raw materials | Weight (g) |
| 1 | Dodecanedioic acid | 60 |
| 2 | Tertiary carboxylic acid glycidyl ester | 60 |
Namely, the same procedure as in example 3 was repeated except that the amount of the reactive solvent in the raw material for cationic resin synthesis was 120 g.
Comparative example 1
A water-soluble polyacrylic acid finish paint comprises the following raw materials:
1. cationic resin synthesis:
preparing a curing agent:
the preparation method of the water-soluble polyacrylic acid finish paint comprises the following steps:
(1) uniformly mixing propylene glycol methyl ether and isopropanol to prepare a diluting solvent; dripping an acrylic acid mixed monomer and a chain transfer agent into a diluent solvent for polymerization reaction for 3 hours at the temperature of 110 ℃, and then preserving heat for 2 hours at the temperature of 110 ℃ to obtain an intermediate A;
(2) sequentially adding the intermediate A into glacial acetic acid and deionized water at 80 ℃ and uniformly mixing to obtain cationic polyacrylic resin;
(3) and mixing the cationic polyacrylic resin with a curing agent according to the ratio of the cross-linking functional group 1: 1 to obtain the water-soluble polyacrylic acid finish paint.
This comparative example is the same as example 3 except that it does not contain a reaction type solvent.
Comparative example 2
The formula of the comparative example except the curing agent is as follows:
otherwise, the same procedure as in example 3 was repeated.
Comparative example 3
The formula of the comparative example except the curing agent is as follows:
otherwise, the same procedure as in example 3 was repeated.
Comparative example 4
This comparative example is the same as example 3 except that the blocked isocyanate curing agent (178.7 g) was used as the curing agent.
The blocked isocyanate curing agent used in this comparative example was purchased from XP2655 curing agent from Bayer chemical industry, Germany.
Comparative example 5
This comparative example is the same as example 3 except that the amino resin (in an amount of 178.7g) was used as the curing agent. The amino resin of this comparative example was purchased from cyanogen specialty Chemicals Shanghai, Inc., cyanogen specialty 325 amino resin.
Experimental example 1
In order to show that the water-soluble polyacrylic acid finish paint prepared by the method has the advantages of high gloss, high hardness and high stain resistance, and the cationic polyacrylic acid resin and the curing agent in the finish paint have good crosslinking performance, the performance of the water-soluble polyacrylic acid finish paint prepared in the examples 1-5 and the comparative examples 1 and 2 is specifically detected, and the specific results are as follows:
the performance detection standard of the water-soluble polyacrylic acid finish paint is as follows: 60 ℃ gloss GB/T954-; the pencil hardness is GB/T6739-2006; adhesion GB/T1720-1979; water resistance GB/T4893.1-2005; acid resistance GB/T4893.1-2005; alkali resistance GB/T4893.1-2005; green tea resistance GB/T23999-2009; coffee resistance GB/T4893.1-2005.
In summary, the invention adopts a free radical polymerization method to synthesize the chain-type high molecular polymer water-soluble cationic polyacrylic resin, which is characterized by high solid content and low viscosity, and improves the quantity of crosslinking functional groups of the cationic resin and reduces the viscosity of a synthesis process system by synthesizing a reaction type solvent intermediate. Meanwhile, the addition of the reactive solvent in the diluting solvent can effectively improve the crosslinking functional group, increase the crosslinking density and improve the compactness of the water-soluble polyacrylic acid finish paint. Furthermore, the cationic polyacrylic resin and the curing agent in the water-soluble polyacrylic acid finish paint have good crosslinking performance, and the prepared water-soluble polyacrylic acid finish paint has the advantages of high gloss, high hardness and high stain resistance through detection.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. The water-soluble polyacrylic acid finish paint is characterized by being mainly prepared by compounding cationic polyacrylic acid resin and a curing agent;
the curing agent comprises at least one of aminosilane, tetra (2-methoxyethoxy) silane and methyltriethoxysilane.
2. The water-soluble polyacrylic acid finish paint according to claim 1, wherein the cationic polyacrylic acid resin is mainly obtained by polymerizing acrylic acid mixed monomers under the action of a diluting solvent and an initiator;
the diluting solvent comprises propylene glycol methyl ether, isopropanol and a reaction type solvent, wherein the reaction type solvent is mainly synthesized from dibasic acid and tert-carbonic acid glycidyl ester.
3. The water-soluble polyacrylic acid topcoat as claimed in claim 2, wherein the reactive solvent is prepared by a method comprising:
uniformly mixing dibasic acid and tertiary carbonic acid glycidyl ester, and opening ring reaction at 155-165 ℃ for 3.5-4.5 h;
preferably, the ring-opening reaction is carried out in a protective gas atmosphere, and the protective gas is nitrogen;
preferably, the dibasic acid comprises at least one of adipic acid, isophthalic acid, n-dodecanedioic acid;
preferably, the molar mass ratio of the dibasic acid to the tertiary carbonic acid glycidyl ester is 0.8-1: 1 to 1.3, preferably 1: 1.
4. the water-soluble polyacrylic acid topcoat as claimed in claim 2, wherein the acrylic acid mixed monomer comprises at least one of butyl methacrylate, isooctyl acrylate, methyl methacrylate, hydroxyethyl methacrylate, dimethylaminoethyl methacrylate;
preferably, the initiator comprises at least one of benzoyl peroxide, t-butyl hydroperoxide, di-t-amyl peroxide, hydrogen peroxide and di-t-butyl hydroperoxide, preferably benzoyl peroxide.
5. The water-soluble polyacrylic acid topcoat as claimed in claim 4, wherein the polymerization raw material of the cationic polyacrylic acid resin further comprises a neutralizer, a chain transfer agent and deionized water.
6. The water-soluble polyacrylic acid topcoat of claim 5, wherein the neutralizing agent comprises at least one of lactic acid, glacial acetic acid, hydrochloric acid, oxalic acid, and phosphoric acid, preferably glacial acetic acid;
preferably, the chain transfer agent comprises at least one of dodecyl mercaptan, mercaptoethanol, isooctyl 3-mercaptopropionate, 2, 4-diphenyl-4-methyl-1-pentene, and linear dimer of alpha-methylstyrene, preferably dodecyl mercaptan.
7. The water-soluble polyacrylic acid finishing coat according to claim 1, wherein the polymerization raw materials of the cationic polyacrylic acid resin comprise, in parts by mass:
30-35 parts of propylene glycol methyl ether, 30-35 parts of isopropanol, 60-120 parts of a reactive solvent, 96-98 parts of butyl methacrylate, 50-55 parts of isooctyl acrylate, 140-145 parts of methyl methacrylate, 50-55 parts of hydroxyethyl methacrylate, 80-85 parts of dimethylaminoethyl methacrylate, 12-15 parts of dodecyl mercaptan, 4-5 parts of benzoyl peroxide, 32-35 parts of glacial acetic acid and 152-155 parts of deionized water;
preferably, the curing agent comprises the following components in parts by weight:
40-45 parts of aminosilane, 65-70 parts of tetra (2-methoxyethoxy) silane and 45-95 parts of methyltriethoxysilane;
preferably, the compounding molar ratio of the cationic polyacrylic resin to the curing agent is 0.8-1: 1-1.25, preferably 1: 1.
8. a preparation method of the water-soluble polyacrylic acid finishing coat according to any one of claims 1 to 7, wherein the preparation method comprises the following steps:
weighing polymerization raw materials for preparing cationic polyacrylic resin, and carrying out polymerization reaction to obtain cationic polyacrylic resin; and then uniformly mixing the cationic polyacrylic resin and a curing agent to obtain the water-soluble polyacrylic acid finish paint.
9. The method for preparing the water-soluble polyacrylic acid finishing coat according to claim 8, wherein the method comprises the following steps:
(a) uniformly mixing propylene glycol methyl ether, isopropanol and a reaction type solvent to prepare a diluting solvent;
(b) dripping an acrylic acid mixed monomer and a chain transfer agent into a diluent solvent for polymerization reaction for 3 hours at the temperature of 110 ℃, and then preserving heat for 2 hours at the temperature of 110 ℃ to obtain an intermediate A;
(c) sequentially adding the intermediate A into a neutralizing agent and deionized water at 80 ℃ and uniformly mixing to obtain cationic polyacrylic resin;
(d) and mixing the cationic polyacrylic resin and a curing agent according to the ratio of the cross-linking functional group 1: 1 to obtain the water-soluble polyacrylic acid finish paint.
10. Use of the water-soluble polyacrylic acid finish paint according to any one of claims 1 to 7 in preparation of a wood finish paint.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210733985.3A CN114891411B (en) | 2022-06-27 | 2022-06-27 | Water-soluble polyacrylic acid finish paint and preparation method and application thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210733985.3A CN114891411B (en) | 2022-06-27 | 2022-06-27 | Water-soluble polyacrylic acid finish paint and preparation method and application thereof |
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| CN114891411A true CN114891411A (en) | 2022-08-12 |
| CN114891411B CN114891411B (en) | 2023-04-28 |
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| CN107674146A (en) * | 2017-11-13 | 2018-02-09 | 中国海洋石油集团有限公司 | Low-VOC aqueous polyacrylate resin of large arch dam and preparation method thereof |
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| CN107674146A (en) * | 2017-11-13 | 2018-02-09 | 中国海洋石油集团有限公司 | Low-VOC aqueous polyacrylate resin of large arch dam and preparation method thereof |
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