CN114891411B - 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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- CN114891411B CN114891411B CN202210733985.3A CN202210733985A CN114891411B CN 114891411 B CN114891411 B CN 114891411B CN 202210733985 A CN202210733985 A CN 202210733985A CN 114891411 B CN114891411 B CN 114891411B
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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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- 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
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- C09D7/63—Additives non-macromolecular organic
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Abstract
The invention provides a water-soluble polyacrylic acid finish paint, 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 property, 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 paint, in particular to water-soluble polyacrylic acid finish paint, and a preparation method and application thereof.
Background
The water-soluble polyacrylic acid paint is taken as one of the directions of environment-friendly paint, and represents the development direction of the future paint industry. In recent years, water-based industrial paint for industrial coating fields has been rapidly developed due to 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, and the emulsion type acrylic resins are characterized in that the crosslinking density is not compact enough, the compatibility between the low-paint and the surface of the wood is poor, and the performance of the emulsion type cationic resins is obviously insufficient compared with that of the anionic emulsion, so that the cationic resins in the current market are fewer, and the market demands cannot be met. Meanwhile, the compatibility of the curing agent used for preparing the existing water-soluble polyacrylic acid and the 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 finishing paint which has the advantages of high gloss, high hardness and high stain resistance, and the curing agent has good compatibility with the cationic polyacrylic acid resin.
In view of this, the present invention has been made.
Disclosure of Invention
The first aim of the invention is to provide a water-soluble polyacrylic acid finishing paint, wherein the cationic polyacrylic acid resin and the curing agent in the water-soluble polyacrylic acid finishing paint have good crosslinking property; meanwhile, through detection, the water-soluble polyacrylic acid finishing paint has the advantages of high gloss, high hardness and high stain resistance.
The second aim of the invention is to provide a preparation method of the water-soluble polyacrylic acid finishing paint.
The third object of the invention is to provide an application of the water-soluble polyacrylic acid finishing paint, which can be widely applied to the preparation process of woodware finishing paint.
In order to achieve the above object of the present invention, the following technical solutions are specifically adopted:
the water-soluble polyacrylic acid finish paint provided by the invention 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 acid 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 by dibasic acid and tertiary glycidyl ester.
Further, the preparation method of the reactive solvent comprises the following steps:
the dibasic acid and the tertiary glycidyl ester are evenly mixed and then subjected to ring opening reaction for 3.5 to 4.5 hours at the temperature of 155 to 165 ℃;
preferably, the ring-opening reaction is performed under a protective gas atmosphere, wherein the protective gas is nitrogen;
preferably, the dibasic acid comprises at least one of adipic acid, isophthalic acid and n-dodecane dibasic acid.
Preferably, the mass ratio of the dibasic acid to the tertiary glycidyl ester is 0.8-1:1 to 1.3, preferably 1:1.
further, the acrylic acid 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 neutralizer, 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, and 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 polymerization raw materials of the cationic polyacrylic resin comprise, 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 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 the cationic polyacrylic resin, and carrying out polymerization reaction to obtain the cationic polyacrylic resin; and then uniformly mixing the cationic polyacrylic resin with a curing agent to obtain the water-soluble polyacrylic finish paint.
Further, the preparation method comprises the following steps:
(a) Uniformly mixing propylene glycol methyl ether, isopropanol and a reaction solvent to prepare a dilution solvent;
(b) Dropwise adding an acrylic acid mixed monomer and a chain transfer agent into a diluting solvent at 110 ℃ for polymerization reaction for 3 hours, and then preserving heat at 110 ℃ for 2 hours to obtain an intermediate A;
(c) Sequentially adding the intermediate A into a neutralizer and deionized water at 80 ℃ and uniformly mixing to obtain cationic polyacrylic resin;
(d) The cationic polyacrylic resin and the curing agent are subjected to crosslinking functional group 1:1 to obtain the water-soluble polyacrylic acid finish paint.
The invention provides an application of the water-soluble polyacrylic acid finishing paint in preparing wood finishing 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 property, and the prepared water-soluble polyacrylic acid finish paint has the advantages of high gloss, high hardness and high stain resistance through detection.
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 for polymerization reaction to obtain the cationic polyacrylic acid resin; and then uniformly mixing the cationic polyacrylic resin with a curing agent to obtain the water-soluble polyacrylic 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 clearly and completely described in connection with the embodiments, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
According to one aspect of the invention, a water-soluble polyacrylic acid finishing paint 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 property, 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 present invention, the cationic polyacrylic resin is mainly obtained by polymerizing an acrylic acid 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 by dibasic acid and tertiary glycidyl ester.
As a preferred embodiment, the method for synthesizing the chain-type high-molecular polymer water-soluble cationic polyacrylic resin by adopting the free radical polymerization method is characterized by high solid and low viscosity, and the number of crosslinking functional groups of the cationic resin is increased by synthesizing a reaction type solvent intermediate, so that the viscosity of a synthesis process system is reduced. Meanwhile, the addition of the reactive solvent in the diluent 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 dibasic acid and tertiary glycidyl ester can effectively improve the solid content of cationic polyacrylic resin and reduce the VOC content; meanwhile, the reactive solvent can 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 a reactive solvent comprises:
the dibasic acid and the tertiary glycidyl ester are evenly mixed and then subjected to ring opening reaction for 3.5 to 4.5 hours at the temperature of 155 to 165 ℃;
preferably, the ring-opening reaction is performed under a protective gas atmosphere, wherein the protective gas is nitrogen;
preferably, the dibasic acid comprises at least one of adipic acid, isophthalic acid and n-dodecane dibasic acid.
Preferably, the mass ratio of the dibasic acid to the tertiary 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 glycidyl ester into a four-necked 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 exotherm began at approximately 140-150℃and the reaction was continued for 4h at 160℃to give a clear pale yellow liquid.
In a preferred embodiment of the present invention, the acrylic acid 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 includes 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, the glacial acetic acid is added as a neutralizing agent, so that the alkaline salification water of the dimethylaminoethyl methacrylate in the acrylic acid mixed monomer can be effectively neutralized.
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 regulate the molecular weight during the polymerization of the cationic polyacrylic resin, thereby synthesizing a chain-type high molecular polymer.
In a preferred embodiment of the present invention, the polymerization raw materials of the cationic polyacrylic resin include, 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 present invention, the 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, a method for preparing the water-soluble polyacrylic acid finishing paint comprises the following steps:
weighing polymerization raw materials for preparing the cationic polyacrylic resin, and carrying out polymerization reaction to obtain the cationic polyacrylic resin; and then uniformly mixing the cationic polyacrylic resin with a curing agent to obtain the water-soluble polyacrylic 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 for polymerization reaction to obtain the cationic polyacrylic acid resin; and then uniformly mixing the cationic polyacrylic resin with a curing agent to obtain the water-soluble polyacrylic 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 solvent to prepare a dilution solvent;
(b) Dropwise adding an acrylic acid mixed monomer and a chain transfer agent into a diluting solvent at 110 ℃ for polymerization reaction for 3 hours, and then preserving heat at 110 ℃ for 2 hours to obtain an intermediate A;
(c) Sequentially adding the intermediate A into a neutralizer and deionized water at 80 ℃ and uniformly mixing to obtain cationic polyacrylic resin;
(d) The cationic polyacrylic resin and the curing agent are subjected to crosslinking functional group 1:1 to obtain the water-soluble polyacrylic acid finish paint.
According to one aspect of the invention, the application of the water-soluble polyacrylic acid finishing paint in preparing wood finishing paint is provided.
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 scheme of the invention will be further described with reference to examples.
Example 1
The water-soluble polyacrylic acid finishing paint comprises the following raw materials:
1. reactive solvents:
| numbering device | Raw material name | Weight (g) |
| 1 | Adipic acid | 30 |
| 2 | Glycidyl versatate | 30 |
2. Cationic resin synthesis:
preparing a curing agent:
the preparation method of the water-soluble polyacrylic acid finishing paint comprises the following steps:
(1) Adding adipic acid and tertiary glycidyl ester into a four-necked flask provided with a thermometer, a stirring device, a heating device and a condensing device, introducing nitrogen for protection, and stirring and heating to 160 ℃; starting 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 solvent to prepare a dilution solvent; dropwise adding an acrylic acid mixed monomer and a chain transfer agent into a diluting solvent at 110 ℃ for polymerization reaction for 3 hours, and then preserving heat at 110 ℃ for 2 hours 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) The cationic polyacrylic resin and the curing agent are subjected to crosslinking functional group 1:1 to obtain the water-soluble polyacrylic acid finish paint.
Example 2
The water-soluble polyacrylic acid finishing paint comprises the following raw materials:
1. reactive solvents:
| numbering device | Raw material name | Weight (g) |
| 1 | Adipic acid | 60 |
| 2 | Glycidyl versatate | 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 example 1.
Example 3
The water-soluble polyacrylic acid finishing paint comprises the following raw materials:
1. reactive solvents:
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 example 1.
Example 4
The reaction-free solvents of this example were:
| numbering device | Raw material name | Weight (g) |
| 1 | Isophthalic acid | 30 |
| 2 | Glycidyl versatate | 30 |
Namely, the procedure of example 3 was repeated except that 60g of the reactive solvent was used as the starting material for the synthesis of the cationic resin.
Example 5
The reaction-free solvents of this example were:
| numbering device | Raw material name | Weight (g) |
| 1 | N-dodecanedioic acid | 60 |
| 2 | Glycidyl versatate | 60 |
Namely, the procedure of example 3 was repeated except that the amount of the solvent to be used in the raw material for synthesizing the cationic resin was 120 g.
Comparative example 1
The water-soluble polyacrylic acid finishing paint comprises the following raw materials:
1. cationic resin synthesis:
preparing a curing agent:
the preparation method of the water-soluble polyacrylic acid finishing paint comprises the following steps:
(1) Uniformly mixing propylene glycol methyl ether and isopropanol to prepare a diluting solvent; dropwise adding an acrylic acid mixed monomer and a chain transfer agent into a diluting solvent at 110 ℃ for polymerization reaction for 3 hours, and then preserving heat at 110 ℃ for 2 hours 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) The cationic polyacrylic resin and the curing agent are subjected to crosslinking functional group 1:1 to obtain the water-soluble polyacrylic acid finish paint.
This comparative example is the same as example 3 except that the reactive solvent is not included.
Comparative example 2
The formulation of the comparative example divided into curing agent is:
except for this, the procedure of example 3 was repeated.
Comparative example 3
The formulation of the comparative example divided into curing agent is:
except for this, the procedure of example 3 was repeated.
Comparative example 4
This comparative example was conducted in the same manner as in example 3 except that a 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 in Bayer chemical engineering, germany.
Comparative example 5
This comparative example was conducted in the same manner as in example 3 except that an amino resin (178.7 g in amount) was used as the curing agent. The amino resin of this comparative example was purchased from cyanogen specialty chemical Shanghai Co., ltd.
Experimental example 1
In order to show that the water-soluble polyacrylic acid finishing paint prepared by the application has the advantages of high gloss, high hardness and high stain resistance, and meanwhile, the cationic polyacrylic acid resin and the curing agent in the finishing paint have good crosslinking property, the water-soluble polyacrylic acid finishing paint prepared by the examples 1-5 and the comparative examples 1 and 2 is subjected to performance detection, and specific results are as follows:
the performance detection standard of the water-soluble polyacrylic acid finishing paint is as follows: 60 DEG gloss GB/T954-2007; pencil hardness 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 tolerance GB/T4893.1-2005.
In summary, the method for synthesizing the water-soluble cationic polyacrylic resin of the chain-type high-molecular polymer by adopting the free radical polymerization method is characterized by high solid and low viscosity, and the number of cross-linking functional groups of the cationic resin is increased by synthesizing a reaction type solvent intermediate, so that the viscosity of a system in the synthesis process is reduced. Meanwhile, the addition of the reactive solvent in the diluent 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 property, 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 for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (6)
1. The water-soluble polyacrylic acid finishing paint is characterized by being prepared by compounding cationic polyacrylic acid resin and a curing agent;
the cationic polyacrylic resin comprises the following polymerization raw materials 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;
the curing agent comprises the following components in parts by mass: 40-45 parts of aminosilane, 65-70 parts of tetra (2-methoxyethoxy) silane and 45-95 parts of methyltriethoxysilane;
the molar ratio of the cationic polyacrylic resin to the curing agent is 0.8-1:1-1.25.
2. The water-soluble polyacrylic acid finishing 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 by dibasic acid and tertiary glycidyl ester.
3. The water-soluble polyacrylic acid top-coat paint according to claim 2, wherein the preparation method of the reactive solvent comprises the following steps:
the dibasic acid and the tertiary glycidyl ester are evenly mixed and then subjected to ring opening reaction for 3.5 to 4.5 hours at the temperature of 155 to 165 ℃;
the ring-opening reaction is carried out in a protective gas atmosphere, wherein the protective gas is nitrogen;
the dibasic acid comprises at least one of adipic acid, isophthalic acid and n-dodecane dibasic acid;
the molar mass ratio of the dibasic acid to the tertiary glycidyl ester is 0.8-1:1 to 1.3.
4. A method of preparing a water-soluble polyacrylic finish according to any one of claims 1 to 3, comprising the steps of:
weighing polymerization raw materials for preparing the cationic polyacrylic resin, and carrying out polymerization reaction to obtain the cationic polyacrylic resin; and then uniformly mixing the cationic polyacrylic resin with a curing agent to obtain the water-soluble polyacrylic finish paint.
5. The method for preparing a water-soluble polyacrylic acid top-coat paint according to claim 4, wherein the preparation method comprises the following steps:
(a) Uniformly mixing propylene glycol methyl ether, isopropanol and a reaction solvent to prepare a dilution solvent;
(b) Dropwise adding an acrylic acid mixed monomer and a chain transfer agent into a diluting solvent at 110 ℃ for polymerization reaction for 3 hours, and then preserving heat at 110 ℃ for 2 hours to obtain an intermediate A;
(c) Sequentially adding the intermediate A into a neutralizer and deionized water at 80 ℃ and uniformly mixing to obtain cationic polyacrylic resin;
(d) The cationic polyacrylic resin and the curing agent are subjected to crosslinking functional group 1:1 to obtain the water-soluble polyacrylic acid finish paint.
6. Use of a water-soluble polyacrylic finish according to any one of claims 1 to 3 for the preparation of a wood finish.
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