CN108752577B - Auxiliary agent for inhibiting tannin diffusion in wood and use method thereof - Google Patents

Auxiliary agent for inhibiting tannin diffusion in wood and use method thereof Download PDF

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CN108752577B
CN108752577B CN201810667207.2A CN201810667207A CN108752577B CN 108752577 B CN108752577 B CN 108752577B CN 201810667207 A CN201810667207 A CN 201810667207A CN 108752577 B CN108752577 B CN 108752577B
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tannin
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CN108752577A (en
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郑耀臣
鞠军
姜梦林
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Yantai University
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    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G65/00—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule
    • C08G65/02—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring
    • C08G65/26—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring from cyclic ethers and other compounds
    • C08G65/2618—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring from cyclic ethers and other compounds the other compounds containing nitrogen
    • C08G65/2621—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring from cyclic ethers and other compounds the other compounds containing nitrogen containing amine groups
    • C08G65/2624—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring from cyclic ethers and other compounds the other compounds containing nitrogen containing amine groups containing aliphatic amine groups
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    • C09D167/00—Coating compositions based on polyesters obtained by reactions forming a carboxylic ester link in the main chain; Coating compositions based on derivatives of such polymers
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    • C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
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    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
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    • C09D7/65—Additives macromolecular

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Abstract

The invention provides an auxiliary agent for inhibiting tannin diffusion in wood and a using method thereof. The organic amine polymer comprises 95-98% of organic amine polymer and 2-5% of calcium chloride by mass percent. The auxiliary agent comprises an organic amine condensation polymer component, the polymer component and a novel alcohol-soluble material capable of being rapidly combined with tannin can rapidly fix the tannin in a high-efficiency chemical reaction mode between each component and the tannin, and solves a series of problems caused by low hardness of the existing waterborne wood coating, sealing of the tannin and poor inhibition effect.

Description

Auxiliary agent for inhibiting tannin diffusion in wood and use method thereof
Technical Field
The invention belongs to the technical field of complexing agents, and particularly relates to an auxiliary agent for inhibiting tannin in wood from diffusing into water-based wood paint and a using method thereof.
Background
Tannin is also called tannin and is a water-soluble yellow to dark brown polyphenol compound generated in the process of plant growth. The traditional oil paint inhibits tannin from diffusing into finish paint by using the shielding effect of seal primer with high hardness and high crosslinking density; the aqueous paint is prepared by brushing a single-component primer for multiple times (namely, by increasing the thickness of the coating and prolonging the diffusion path of tannic acid), so that the influence on the paint caused by the free diffusion of tannic acid is avoided. In recent years, pressure from two aspects of environmental protection (mainly organic volatile emission (VOC)) and continuously improved human health consciousness, the application of the high-sealing solvent type wood coating is less and less, and the application of the water-based environment-friendly wood coating is increasingly emphasized. However, due to the limitation of the film forming mechanism of the aqueous wood paint, the aqueous wood paint does not generate a crosslinking reaction in the film forming process, so that the hardness of the dried coating is not high, and the inhibition effect on tannin diffusion is poor. In order to solve the problem of poor sealing effect of the single-component water-based primer on the tannin, a method of increasing the drying thickness of the sealing primer by adopting a multi-construction mode is adopted at present to achieve the effect of inhibiting the tannin from diffusing to the finish paint. However, the construction process which simply relies on increasing the number of times of construction to prevent the tannin from diffusing is not only very cumbersome, but also increases the labor and material costs. In order to solve the problem that the existing waterborne wood sealing primer needs to be constructed for multiple times, the American Dow chemical company provides a new generation of Avase product, and a phosphate monomer is introduced into polymer molecules. The self-crosslinking reaction in and among molecules generated by the phosphate monomers moderately increases the compactness of a paint film and effectively limits the migration of tannin. However, the structure of the phosphate monomers and their distribution in the polymer molecule are difficult to control during the synthesis. Therefore, the development of a new material or a new additive which is environment-friendly, simple and convenient to operate and moderate in price and can effectively inhibit the tannin diffusion is the key for solving the problem of the existing water-based wood lacquer that the tannin diffusion is inhibited.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide an auxiliary agent for inhibiting the diffusion of tannin in wood and a preparation method thereof.
The auxiliary agent comprises an organic amine condensation polymer component, the polymer component and an alcohol-soluble new material capable of being rapidly combined with tannin can rapidly fix the tannin in a high-efficiency chemical reaction mode between each component and the tannin, and solves a series of problems caused by low hardness of the existing waterborne wood coating, sealing of the tannin and poor inhibition effect.
Firstly, the technical scheme of the organic amine condensate is provided:
an organic amine condensation polymer of the formula:
Figure GDA0002541728090000021
wherein:
R1is selected from
Figure GDA0002541728090000022
Figure GDA0002541728090000023
R2Is selected from
Figure GDA0002541728090000024
Figure GDA0002541728090000025
In the above formula, m, n, p, q, m ', p ', q ' are any positive integer.
The organic amine condensation polymer is a condensation polymer of ethylene glycol diglycidyl ether and polyether amine, a condensation polymer of diethylene glycol glycidyl ether and isophorone diamine, a condensation polymer of triethylene glycol glycidyl ether and 1, 3-cyclohexyldimethylamine, a condensation polymer of polyethylene glycol diglycidyl ether and polyether amine, a condensation product of polyethylene glycol diglycidyl ether and 1, 6-hexamethylene diamine, a condensation polymer of diethylene glycol glycidyl ether and diethylene triamine, a condensation polymer of ethylene glycol diglycidyl ether and N-aminoethyl piperazine, a condensation polymer of diethylene glycol glycidyl ether and 1, 4-p-xylylenediamine, a condensation polymer of glycerol triglycidyl ether and hexamethylene diamine, a condensation polymer of neopentyl glycol diglycidyl ether and 2, 2' -diamino ethyl ether, 1, 4-butanediol diglycidyl ether and 2, a polycondensate of 2 '-diaminodiethyl ether, a polycondensate of hexanediol diglycidyl ether and 2, 2' -diaminotriethyl ether, a polycondensation product of bisphenol A diglycidyl ether (E-51) and 2,2 '-diaminotriethyl ether, a polycondensation product of neopentyl glycol diglycidyl ether and hexanediol diglycidyl ether and 2, 2' -diaminotriethyl ether, a polycondensate of diethylene glycol glycidyl ether and 1, 6-hexamethylenediamine and 2,2 '-diaminodiethyl ether, and a polycondensate of diethylene glycol glycidyl ether and hexanediol diglycidyl ether and 1, 3-cyclohexyldimethylamine and 2, 2' -diaminodiethyl ether.
The organic amine condensation polymer is applied to one of auxiliary components of the water-borne wood paint auxiliary agent and is used for inhibiting tannin diffusion.
The preparation method of the organic amine condensation polymer comprises the following steps:
feeding an organic amine compound and glycidyl ether according to a molar ratio (1.01-2) of 1, adding a solvent, wherein the mass of the solvent accounts for 67-70% of the total mass of the system, then adding a catalyst accounting for 0-3% of the total mass of the system, and reacting for 2-48 hours at the temperature of 15 ℃ to the reflux temperature of the solvent to obtain an organic amine condensation polymer solution; then precipitating the organic amine condensation polymer solution in petroleum ether or anhydrous ether, collecting the precipitate, and drying in a vacuum oven to constant weight to obtain an organic amine condensation polymer;
wherein the organic amine compound is selected from at least one or a mixture of more of polyether amine D230, polyether amine D400, polyether amine D2000, polyether amine T403, isophorone diamine, 1, 3-cyclohexyldimethylamine, 1, 6-hexamethylene diamine, diethylenetriamine, N-aminoethyl piperazine, 1, 4-p-xylylenediamine, 2 ' -diamino diethyl ether, 2 ' -diamino diethyl ether and 2,2 ' -diamino triethyl ether,
the glycidyl ether compound is selected from at least one or a mixture of more of ethylene glycol diglycidyl ether, diethylene glycol glycidyl ether, triethylene glycol glycidyl ether, polydiethylene glycol diglycidyl ether, glycerol triglycidyl ether, neopentyl glycol diglycidyl ether, 1, 4-butanediol diglycidyl ether, 1, 6-hexanediol diglycidyl ether and bisphenol A diglycidyl ether,
the solvent is selected from one of ethanol or absolute ethanol,
the catalyst is selected from at least one of triethylamine, 1, 8-diazabicycloundec-7-ene (DBU), Pentamethyldiethylenetriamine (PMDETA), N-dimethylcyclohexylamine, bis (2-dimethylaminoethyl) ether, pyridine and piperidine.
The resulting organic amine polymer solution is used as one of the main components of a tannin diffusion aid in wood inhibition.
On the basis, the invention provides an auxiliary agent for inhibiting the diffusion of tannin in wood and a preparation method thereof.
An assistant for inhibiting the diffusion of tannin in wood, which consists of the organic amine condensation polymer and calcium chloride in percentage by mass,
wherein,
the organic amine condensation polymer accounts for 95 to 98 percent,
the content of calcium chloride is 2-5%.
The effect of mixing the prepared assistant with tannic acid is shown in fig. 2, and fig. 2 shows the effect of inhibiting the mixing of the tannin diffusion assistant with tannic acid. The left graph is the tannin diffusion inhibition auxiliary agent (mass concentration is 2%), the middle graph is the aqueous solution of tannic acid (mass concentration is 4%), and the right graph is the white precipitate generated immediately after the tannin diffusion inhibition auxiliary agent and the aqueous solution of tannic acid are directly mixed, which shows that the organic amine condensation polymer can rapidly react with tannin to form water-insoluble precipitate and prevent the tannin from diffusing in an aqueous medium.
The application method of the water-based tannin diffusion prevention aid comprises the following steps:
40-50 parts of water-based resin, 40-50 parts of solvent and 5-10 parts of tannin diffusion auxiliary agent according to the mass parts, wherein the water-based resin is any one of water-based polyurethane resin, water-based polyacrylate resin and water-based alkyd resin, the solvent is ethanol or absolute ethanol,
the components are uniformly mixed, sprayed, brushed, dip-coated or wiped on wood or woodware, and then dried to obtain the wood-plastic composite material.
Preferably, the coating is sprayed, brushed, dipped or rubbed onto wood with a moisture content of < 12%.
Preferably, the constructed wood or woodware is placed in an environment of 25-50 ℃ for drying, and the thickness of a paint film after drying is not less than 20 microns.
The mechanism of action is analyzed as follows: the reaction product of an organic amine with a di-or polyfunctional glycidyl ether contains unreacted primary amino groups (NH)2) And secondary amine groups (NH) generated in the reaction process, and the basic functional groups can rapidly generate acid-base interaction with carboxyl groups in tannin molecules to capture and fix the tannin, thereby playing a role in inhibiting the tannin from freely diffusing. On the other hand, calcium chloride can spontaneously ionize in the presence of water to form calcium cations (Ca)2+) And calcium ions are further complexed with carboxyl groups in the tannin to form a precipitate insoluble in water, so that the diffusion of the tannin in the water-based wood paint is inhibited. The interaction of tannic acid-amino base and the complexation of calcium positive ions-tannin negative ions are quick reactions, so the invention can efficiently inhibit the diffusion of tannic acid. In addition, the complexing agent-calcium chloride selected by the invention is a cheap and nontoxic compound; the selected solvent system is volatile environment-friendly solvent ethanol or absolute ethanol, so that not only can the polycondensation product and calcium chloride be well dissolved (the construction viscosity can be conveniently adjusted, and the thickness of the anti-tannin coating can be flexibly regulated and controlled), but also a low azeotrope can be formed with water to facilitate the volatilization of the water, the construction efficiency is improved, the requirement on the drying process of wood drying equipment is reduced, and the energy consumption is saved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 shows the IR spectrum of a polycondensate of ethylene glycol glycidyl ether with polyetheramine D230 from example 1.
Fig. 2 is a graph comparing the effect of inhibiting the mixing of tannin diffusion aids with tannic acid.
Wherein, the left figure is the tannin diffusion inhibition auxiliary agent (mass concentration is 2%), the middle figure is the aqueous solution of tannic acid (mass concentration is 4%), and the right figure is the tannin diffusion inhibition auxiliary agent and the aqueous solution of tannic acid which are directly mixed to immediately generate precipitate.
FIG. 3 is a graph comparing the effect of the coating without the anti-tannin additive (left) and the coating with the anti-tannin additive (right) of example 3.
Detailed Description
Example 1
9.68g of ethanol, polyetheramine D230(2.41g,0.011mol) and ethylene glycol glycidyl ether (1.74g,0.010mol) are added into a reactor, and the mixture is reacted for 12 hours at 60 ℃ under stirring, cooled and filtered to obtain an ethanol solution of the organic amine condensation polymer. FIG. 1 is an IR spectrum of a glycol glycidyl ether-polyetheramine D230 polycondensate illustrating the successful synthesis of an organic aminal polymer. Precipitating the solution in petroleum ether or anhydrous ether, collecting precipitate, and drying in a vacuum oven to constant weight to obtain organic amine condensation polymer.
And mixing and dissolving the organic amine condensation polymer and ethanol or absolute ethanol according to the mass ratio of 3: 7. And adding 5% of calcium chloride (0.89g), uniformly stirring, and filtering to obtain the tannin diffusion inhibiting assistant for aqueous woodware coating.
40 parts of water-based acrylate resin, 50 parts of absolute ethyl alcohol and 10 parts of tannin-diffusion-proof auxiliary agent, wherein the components are uniformly mixed and then sprayed on wood with the water content of less than 12%. The woodware after construction is placed in an environment of 50 ℃ for drying, and the thickness of a paint film after drying is about 30 microns.
Table 1 shows the Δ L Δ a, Δ b, and Δ E values of the wood-made templates with the anti-tannin additive added and without the anti-tannin additive added, measured with an alice X-Rite colorimeter.
TABLE 1 test results of Alice X Rite color difference meter
Index (I) Test point I Test point II Test point III Mean value of
⊿L* -1.53 -1.43 -1.57 1.51
⊿a -0.32 -0.30 -0.29 -0.30
⊿b 1.39 1.49 1.49 1.46
⊿E 2.09 2.08 2.18 2.12
Figure GDA0002541728090000061
Wherein Δ L (L)Without addition of auxiliary agents–LAddition of auxiliaries)，⊿a＝(aWithout addition of auxiliary agents-aAddition of auxiliaries)；⊿b＝(bWithout addition of auxiliary agents-bAddition of auxiliaries)。
The wood lacquer added with the glycol glycidyl ether-polyether amine D230 polycondensate-calcium chloride ethanol solution has a good tannin diffusion prevention effect.
Example 2
6.23g of ethanol, diethylene glycol glycidyl ether (1.09g,0.005mol) and isophorone diamine (1.70g,0.01mol) were charged into a reactor, 1, 8-diazabicycloundecen-7-ene (0.28g) having a catalyst mass fraction of 3% was added, and the mixture was reacted at 15 ℃ for 48 hours with stirring, and then filtered to obtain an ethanol solution of an organoamine polymer. Precipitating the solution in petroleum ether or anhydrous ether, collecting precipitate, and drying in a vacuum oven to constant weight to obtain organic amine condensation polymer.
And mixing and dissolving the organic amine condensation polymer and ethanol or absolute ethanol according to the mass ratio of 3: 7. Adding 3% of calcium chloride (0.23g), uniformly stirring, and filtering to obtain the tannin diffusion inhibiting assistant for aqueous woodenware coating.
50 parts of water-based alkyd resin, 42 parts of ethanol and 8 parts of tannin diffusion prevention auxiliary agent, wherein the components are uniformly mixed and then are sprayed on wood with the water content of less than 12%. The woodware after construction is placed in an environment of 25 ℃ for drying, and the thickness of a paint film after drying is about 40 micrometers.
Table 2 shows that the woodenware paint added with the diethylene glycol glycidyl ether-isophorone diamine polycondensate-calcium chloride ethanol solution has better tannin diffusion prevention effect by using an Achromatic X-Rite color difference meter to test the delta L, delta a, delta b and delta E values of the sample plate made of the woodenware paint added with the tannin prevention aid and without the tannin prevention aid.
TABLE 2 test results of Alice X Rite color difference meter
Index (I) Test point I Test point II Test point III Mean value of
⊿L* -1.47 -1.32 -1.34 -1.37
⊿a -0.83 -0.82 -0.83 -0.83
⊿b 3.99 4.21 4.03 4.08
⊿E 4.33 13.88 4.33 7.51
Figure GDA0002541728090000062
Wherein Δ L (L)Without addition of auxiliary agents–LAddition of auxiliaries)，⊿a＝(aWithout addition of auxiliary agents-aAddition of auxiliaries)；⊿b＝(bWithout addition of auxiliary agents-bAddition of auxiliaries)。
Example 3
In the reactor, 2' -diamino triether ether and 1, 6-hexanediol diglycidyl ether are mixed according to a molar ratio of 1.01: 1.00, adjusting the mass concentration of the mixture to 67% by using absolute ethyl alcohol, adding triethylamine with the mass fraction of 3%, and reacting for 6 hours at 50 ℃ under the stirring condition. Cooling and filtering to obtain the ethanol solution of the organic amine condensation polymer. Precipitating the solution in petroleum ether or anhydrous ether, collecting precipitate, and drying in a vacuum oven to constant weight to obtain organic amine condensation polymer.
And mixing and dissolving the organic amine condensation polymer and ethanol or absolute ethanol according to the mass ratio of 3: 7. And adding calcium chloride with the mass fraction of 2%, uniformly stirring, and filtering to obtain the tannin diffusion inhibiting additive for coating the aqueous woodware.
45 parts of water-based acrylate resin, 46 parts of absolute ethyl alcohol and 9 parts of tannin-diffusion-preventing auxiliary agent, wherein the components are uniformly mixed and then sprayed on wood with the water content of less than 12%. The woodware after construction is placed in an environment of 35 ℃ for drying, and the thickness of a paint film after drying is about equal to 30 micrometers, as shown in figure 3. Fig. 3 is a comparison of the effects of the coating (left) without the tannin-proof auxiliary and the coating (right) with the tannin-proof auxiliary, which illustrates that the coating without the tannin-proof diffusion auxiliary has the problem of tannin diffusion (left), the coating with the tannin-proof diffusion auxiliary has been added (right), the diffusion of tannin is effectively inhibited, and the color of the white coating has not changed.
Table 3 shows that the wood lacquer added with the 1, 6-hexanediol glycidyl ether-2, 2' -diaminotriethylether polycondensate-calcium chloride ethanol solution has better tannin diffusion prevention effect.
TABLE 3 test results of Alice X Rite color difference meter
Index (I) Test point I Test point II Test point III Mean value of
⊿L* -0.06 0.13 0.03 0.03
⊿a -0.55 -0.55 -0.55 -0.55
⊿b 2.48 2.97 2.96 2.80
⊿E 2.54 3.02 3.01 2.86
Figure GDA0002541728090000071
Wherein Δ L (L)Without addition of auxiliary agents–LAddition of auxiliaries)，⊿a＝(aWithout addition of auxiliary agents-aAddition of auxiliaries)；⊿b＝(bWithout addition of auxiliary agents-bAddition of auxiliaries)。
Example 4
In the reactor, N-aminoethylpiperazine and diethylene glycol glycidyl ether are mixed according to a molar ratio of 1.6: 1.00 feeding, adjusting the mass concentration of the mixture to 68% by using ethanol, adding DBU (diethylene glycol monobutyl ether) accounting for 2% of the total mass as a catalyst, and reacting for 12 hours at 40 ℃ under the stirring condition. Cooling and filtering to obtain the ethanol solution of the organic amine condensation polymer. Precipitating the solution in petroleum ether or anhydrous ether, collecting precipitate, and drying in a vacuum oven to constant weight to obtain organic amine condensation polymer.
And mixing and dissolving the organic amine condensation polymer and ethanol or absolute ethanol according to the mass ratio of 3: 7. Adding 2% of calcium chloride, stirring uniformly, and filtering to obtain the tannin diffusion inhibiting additive for coating the water-based woodware.
50 parts of waterborne polyurethane resin, 45 parts of ethanol and 5 parts of tannin-diffusion-proof auxiliary agent, wherein the components are uniformly mixed and then are sprayed on wood with the water content of less than 12%. The woodware after construction is placed in an environment of 40 ℃ for drying, and the thickness of a paint film after drying is about 35 microns.
Table 4 shows that the woodenware paint added with the diethylene glycol glycidyl ether-N-aminoethyl piperazine polycondensate-calcium chloride ethanol solution has better tannin diffusion prevention effect by using an Achromatic X-Rite color difference meter to test the delta L, delta a, delta b and delta E values of the sample plate made of the woodenware paint added with the tannin prevention auxiliary agent and without the tannin prevention auxiliary agent.
TABLE 4 test results of Alice X Rite color difference meter
Index (I) Test point I Test point II Test point III Mean value of
⊿L* -1.03 -1.04 -1.07 -1.05
⊿a -0.42 -0.40 -0.43 -0.42
⊿b 2.01 1.99 2.04 2.01
⊿E 2.30 2.28 2.34 2.31
Figure GDA0002541728090000081
Wherein Δ L (L)Without addition of auxiliary agents–LAddition of auxiliaries)，⊿a＝(aWithout addition of auxiliary agents-aAddition of auxiliaries)；⊿b＝(bWithout addition of auxiliary agents-bAddition of auxiliaries)。
Example 5
1, 4-para-xylylenediamine and diethylene glycol glycidyl ether in a molar ratio of 1.25: 1.00, adjusting the mass concentration of the mixture to 70% by using absolute ethyl alcohol, and reacting for 8 hours at 60 ℃ under the stirring condition. Cooling and filtering to obtain the ethanol solution of the organic amine condensation polymer. Precipitating the solution in petroleum ether or anhydrous ether, collecting precipitate, and drying in a vacuum oven to constant weight to obtain organic amine condensation polymer.
And mixing and dissolving the organic amine condensation polymer and ethanol or absolute ethanol according to the mass ratio of 3: 7. And adding 5% of anhydrous calcium chloride, uniformly stirring, and filtering to obtain the tannin diffusion inhibiting additive for coating the aqueous woodware.
45 parts of water-based acrylate resin, 45 parts of ethanol and 10 parts of tannin-diffusion-preventing auxiliary agent, wherein the components are uniformly mixed and then are sprayed on wood with the water content of less than 12%. The woodware after construction is placed in an environment with the temperature of 25-50 ℃ for drying, and the thickness of a paint film after drying is more than or equal to 50 micrometers.
Example 6
In the reactor, 1, 6-hexanediamine and glycerol triglycidyl ether are mixed according to a molar ratio of 1.05: 1.00 charging, adjusting the mass concentration of the polycondensate to 40% by using diethylene glycol butyl ether, and reacting for 3 hours at 80 ℃ under the stirring condition. And cooling to obtain the ethanol solution of the organic amine condensation polymer. Precipitating the solution in petroleum ether or anhydrous ether, collecting precipitate, and drying in a vacuum oven to constant weight to obtain organic amine condensation polymer.
And mixing and dissolving the organic amine condensation polymer and ethanol or absolute ethanol according to the mass ratio of 3: 7. Adding 2% of anhydrous calcium chloride, uniformly stirring, and filtering to obtain the tannin diffusion inhibiting additive for coating the aqueous woodware.
50 parts of water-based acrylate resin, 40 parts of absolute ethyl alcohol and 10 parts of tannin-diffusion-proof auxiliary agent, wherein the components are uniformly mixed and then sprayed on wood with the water content of less than 12%. The woodware after construction is placed in an environment of 50 ℃ for drying, and the thickness of a paint film after drying is 40 microns.
Example 7
2,2 '-diaminodiethyl ether (0.6mol), 2' -diaminotriethyl ether (1.0mol), 1, 6-hexanediol diglycidyl ether (0.2mol) and diethylene glycol glycidyl ether (0.8mol) were charged into a reactor, and the mass concentration of the mixture was adjusted to 70% with propylene glycol methyl ether, and the reaction was carried out at 50 ℃ for 12 hours with stirring. Cooling and filtering to obtain the ethanol solution of the organic amine condensation polymer. Precipitating the solution in petroleum ether or anhydrous ether, collecting precipitate, and drying in a vacuum oven to constant weight to obtain organic amine condensation polymer.
And mixing and dissolving the organic amine condensation polymer and ethanol or absolute ethanol according to the mass ratio of 3: 7. Adding 2.5% of anhydrous calcium chloride, uniformly stirring, and filtering to obtain the tannin diffusion inhibiting additive for coating the aqueous woodware.
50 parts of water-based alkyd resin, 42 parts of absolute ethyl alcohol and 8 parts of tannin diffusion prevention auxiliary agent, wherein the components are uniformly mixed and then sprayed on wood with the water content of less than 12%. The woodware after construction is placed in an environment with the temperature of 35 ℃ for drying, and the thickness of a paint film after drying is about 50 microns.

Claims (5)

1. An assistant for inhibiting the diffusion of tannin in wood is prepared from organic amine condensating polymer and calcium chloride through proportionally mixing,
the organic amine condensation polymer accounts for 95 to 98 percent,
2-5% of calcium chloride;
wherein the organic amine condensation polymer has a general formula:
Figure FDA0002541728080000011
wherein:
R1is selected from
Figure FDA0002541728080000012
Figure FDA0002541728080000013
R2Is selected from
Figure FDA0002541728080000014
Figure FDA0002541728080000015
In the above formula, m, n, p, q, m ', p ', q ' are any positive integer.
2. The assistant for suppressing tannin diffusion in wood according to claim 1, wherein the organic amine condensate polymer is a condensate of ethylene glycol diglycidyl ether and polyether amine, a condensate of diethylene glycol glycidyl ether and isophorone diamine, a condensate of triethylene glycol glycidyl ether and 1, 3-cyclohexyldimethylamine, a condensate of polyethylene glycol diglycidyl ether and polyether amine, a condensate of polyethylene glycol diglycidyl ether and 1, 6-hexamethylenediamine, a condensate of diethylene glycol glycidyl ether and diethylenetriamine, a condensate of ethylene glycol diglycidyl ether and N-aminoethylpiperazine, a condensate of diethylene glycol glycidyl ether and 1, 4-p-xylylenediamine, a condensate of glycerol triglycidyl ether and hexamethylenediamine, neopentyl glycol diglycidyl ether and 2, a polycondensate of 2 ' -diaminodiethyl ether, a polycondensate of 1, 4-butanediol diglycidyl ether and 2,2 ' -diaminodiethyl ether, a polycondensate of hexanediol diglycidyl ether and 2,2 ' -diaminotriethyl ether, a polycondensate of bisphenol A diglycidyl ether (E-51) and 2,2 ' -diaminotriethyl ether, a polycondensate of neopentyl glycol diglycidyl ether and hexanediol diglycidyl ether and 2,2 ' -diaminotriethyl ether, a polycondensate of diethylene glycol glycidyl ether and 1, 6-hexamethylenediamine and 2,2 ' -diaminodiethyl ether, a polycondensate of diethylene glycol glycidyl ether and hexanediol diglycidyl ether with 1, 3-cyclohexyldimethylamine and 2,2 ' -diaminodiethyl ether.
3. A method of using an aid for inhibiting the diffusion of tannins in wood as in claim 1 or 2, characterized by the steps of:
40-50 parts of water-based resin, 40-50 parts of solvent and 5-10 parts of tannin diffusion auxiliary agent according to the mass parts, wherein the water-based resin is any one of water-based polyurethane resin, water-based polyacrylate resin and water-based alkyd resin, the solvent is ethanol or absolute ethanol,
the components are uniformly mixed, sprayed, brushed, dip-coated or wiped on wood or woodware, and then dried to obtain the wood-plastic composite material.
4. Use according to claim 3, characterized in that the wood with a water content of less than 12% is sprayed, brushed, dipped or rubbed.
5. The use method of claim 3, wherein the constructed wood or woodware is dried in an environment of 25-50 ℃, and the thickness of the dried paint film is not less than 20 microns.
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