An insect-proof and anti-corrosion liquid for wood and its preparation method

Abstract

The present invention relates to the technical field of wood insect prevention and corrosion protection, and specifically relates to an insect prevention and corrosion protection liquid for wood and a preparation method thereof. The insect prevention and corrosion protection liquid includes component A and component B; Component A is prepared by the following process: Take an emulsifier and deionized water and mix them. Under a nitrogen atmosphere, heat and slowly add an isothiazolinone derivative, butyl acrylate, methyl methacrylate, acrylic acid, and 60% - 65% of the initiator by mass of the component. Raise the temperature for reaction; Add acrylic resin and the initiator of the remaining component mass, continue the reaction, disperse at a rotation speed of 500 - 720 r / s for 5 - 10 minutes, and dilute with water to a solid content of 1% to obtain component A. Through the reaction among methyl bromoundecanoate, isothiazolinone, and 2-methylallylamine, the present invention obtains an isothiazolinone derivative, which is a heterocyclic quaternary ammonium salt with an alkyl long chain, improves the antibacterial activity of component A, and enhances the slow-release bactericidal effect of the prepared insect prevention and corrosion protection liquid on wood.

Description

Technical Field

[0001] The present invention relates to the technical field of wood insect prevention and anti-corrosion, and specifically relates to an insect prevention and anti-corrosion liquid for wood and a preparation method thereof. Background Art

[0002] As a renewable natural environmental protection material, wood has good mechanical properties, a high strength-to-weight ratio, impact resistance, and easy processing, and is widely used in fields such as anti-pollution and furniture. However, due to the large number of hydrophilic groups on the wood surface and its own structural characteristics, it will provide a suitable growth space for microorganisms such as fungi, resulting in the rapid growth of microorganisms such as wood-rotting fungi, causing the decay of wood and reducing its use value. To solve such problems, people have studied wood anti-corrosion, and among the studies of many wood anti-corrosion methods, the study of wood preservatives is the most extensive. Wood preservatives are mainly divided into oil-based preservatives, oil-borne preservatives, and water-borne preservatives. Oil-based and oil-borne preservatives have greater impacts on humans, livestock, the environment, etc., while some existing water-borne wood preservatives have poor anti-leaching performance, poor resistance to the erosion of harmful insects, and poor dimensional stability and durability after treating wood. Therefore, we propose an insect prevention and anti-corrosion liquid for wood and a preparation method thereof. Summary of the Invention

[0003] The purpose of the present invention is to provide an insect prevention and anti-corrosion liquid for wood and a preparation method thereof to solve the problems raised in the above background art.

[0004] To solve the above technical problems, the present invention provides the following technical solution: A preparation method of an insect prevention and anti-corrosion liquid for wood, including component A and component B; Component A is prepared by the following process:

[0005] Take an emulsifier and deionized water and mix them. In a nitrogen atmosphere, heat to 75 - 80 °C, slowly add isothiazolinone derivatives, butyl acrylate, methyl methacrylate, acrylic acid, and 60% - 65% of the initiator by mass of the component, and add them within 60 minutes. After adding, raise the temperature to 83 - 87 °C and react for 100 - 150 minutes;

[0006] Add acrylic resin and the remaining initiator by mass of the component, continue to react for 3.0 - 3.5 hours, disperse at a speed of 500 - 720 r / s for 5 - 10 minutes, and dilute with water to a solid content of 1% to obtain component A;

[0007] Component B includes the following mass components: 10 parts of chitosan and 0.1 - 0.3 parts of copper borate.

[0008] Further, the component A is prepared from the following mass components: 10-30 parts of acrylic resin, 3-5 parts of isothiazolinone derivative, 8.0-9.0 parts of butyl acrylate, 8.0-9.0 parts of methyl methacrylate, 2 parts of acrylic acid, 0.9-1.0 part of initiator, 0.38-0.46 part of emulsifier, and 38-46 parts of deionized water.

[0009] Further, a mixture of non-ionic emulsifier AE-200 and anionic emulsifier M-10S, with a mass ratio of 1:2.

[0010] Further, the initiator is potassium persulfate KPS.

[0011] Further, the acrylic resin is an organosilicon-modified acrylic resin.

[0012] Further, the isothiazolinone derivative is prepared by the following process:

[0013] Take methyl bromoundecanoate and acetonitrile, mix them, stir and add isothiazolinone, heat up to 88-92 °C, condense, and reflux for 7.5-8.5 h; distill off the solvent acetonitrile under reduced pressure, wash with acetone, and vacuum dry at 57-63 °C for 3.5-4.5 h to obtain the quaternized product;

[0014] Take benzene and methanol, mix them, add the quaternized product and 2-methylallylamine, stir, heat up to 80-85 °C, condense and reflux, and react for 9.5-10.5 h; distill off the solvent methanol under reduced pressure, extract with ether, and dry at 57-63 °C for 3.5-4.5 h to obtain the amidated product, denoted as the isothiazolinone derivative.

[0015] Further, the ratio of methyl bromoundecanoate to acetonitrile is 35 g:100 mL;

[0016] The molar ratio of methyl bromoundecanoate to isothiazolinone is 1:(1.1-1.5).

[0017] Further, the volume ratio of benzene to methanol is 3:1;

[0018] The mass ratio of the quaternized product to 2-methylallylamine is 10:(0.43-0.45).

[0019] Further, the chitosan is modified, and the specific modification process is as follows:

[0020] Take acetic acid solution, add chitosan, stir to dissolve, add 5-thiazolecarboxaldehyde, stir and react for 160-200 min; add sodium hydroxide solution, let it stand for precipitation, filter, wash, and dry to obtain modified chitosan.

[0021] Furthermore, the ratio of chitosan to acetic acid solution is 1 g / 100 mL;

[0022] The mass ratio of chitosan to 5-thiazolecarboxaldehyde is 10:(23 - 24);

[0023] The mass concentration of the sodium hydroxide solution is 1%.

[0024] Furthermore, the component B is prepared by the following process:

[0025] Take the acetic acid solution and modified chitosan, mix them, add copper borate, and stir to obtain component B.

[0026] Furthermore, the ratio of modified chitosan, copper borate, and acetic acid solution is 1.0 g:(0.1 - 0.3) g:50 mL;

[0027] Copper borate is added in the form of an aqueous solution, and the mass concentration of the copper borate aqueous solution is 5%.

[0028] Furthermore, the mass concentration of the acetic acid solution is 1%.

[0029] Furthermore, the insect-proof and anti-corrosion liquid is applied to wood by vacuum impregnation, and the specific process includes the following:

[0030] Vacuumize the wood to be treated for 10 - 30 min, and the vacuum degree is 0.080 - 0.095 MPa;

[0031] Impregnate in component B for 20 - 30 min, pressurize to 1.0 - 1.4 MPa, continue to impregnate for 20 - 40 min, and then take out;

[0032] Impregnate in component A for 20 - 30 min, pressurize to 1.0 - 1.4 MPa, continue to impregnate for 30 - 60 min, and then take out;

[0033] Dry at room temperature for 24 h, dry at 60 - 80 °C for 3 - 5 h, and then heat up to 100 - 110 °C and dry for 2 - 4 h.

[0034] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0035] 1. Preparation method of insect-proof and anti-corrosion liquid for wood of the present invention: By using the bromine group in methyl bromoundecanoate and the amino group of isothiazolinone to graft methyl undecanoate and isothiazolinone to obtain a quaternized product; then, the methyl alkanoate introduced into the obtained quaternized product undergoes an amidation reaction with the amino group in 2-methylallylamine to obtain an isothiazolinone derivative with an allyl group. Using an initiator, it is copolymerized with monomers such as butyl acrylate, methyl methacrylate, and acrylic acid to obtain a prepolymer, and then an acrylic resin is added to prepare a polyacrylic resin emulsion with isothiazolinone quaternary salt. The isothiazolinone derivative component has a heterocyclic quaternary salt with an alkyl long chain, which can improve the antibacterial activity of the prepared component A, adsorb on the surface of bacteria and destroy its structure, realizing its strong and effective bactericidal performance, thereby enhancing the slow-release bactericidal effect of the prepared insect-proof and anti-corrosion liquid on wood.

[0036] 2. Preparation method of insect-proof and anti-corrosion liquid for wood of the present invention: Chitosan is dissolved in an acetic acid solution and undergoes a nucleophilic addition reaction with added 5-thiazolecarboxaldehyde to form a Schiff base, obtaining a modified chitosan with a nitrogen heterocyclic structure. Then, through electrostatic interaction, the modified chitosan is complexed with copper borate and coordinated with copper ions to obtain component B with antibacterial and insecticidal effects.

[0037] 3. Preparation method of insect-proof and anti-corrosion liquid for wood of the present invention: When component B is vacuum-impregnated on the wood surface, the positively charged modified chitosan-copper borate can form a firm surface film with the negatively charged cellulose fibers on the wood surface, firmly adhering to the surface and pores of the wood, inhibiting the erosion of microorganisms and harmful insects, and realizing the anti-corrosion and insect-proof functions of the wood. Moreover, the complexation of component B in the pores on the wood surface ensures its high permeability, and at the same time improves its anti-leaching property on the wood surface to a certain extent. The dimensional stability of the treated wood is improved.

[0038] 4. Preparation method of insect-proof and anti-corrosion liquid for wood of the present invention: After the wood treated with component B is impregnated in component A and heat-treated and dried, the emulsion formed by the polymerization of isothiazolinone derivatives, acrylic resin, etc. forms a film and cures on the wood surface, improving the waterproof performance of the wood. In the heterocyclic molecular structure of component A, elements such as nitrogen and oxygen are easy to form coordination bonds with the empty orbitals of copper ions in component B, and the carboxyl group of acrylic acid in component A can also coordinate and complex with copper ions, effectively combining the film layer prepared by component B and the film layer prepared by component A, enhancing the interfacial strength between the two, and further improving the dimensional stability and durability of the wood. Specific embodiments

[0039] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0040] The acrylic resin is an organosilicon-modified acrylic resin, WH103C, with a solid content of 45%, sourced from Guangzhou Wanhua New Material Technology Co., Ltd.

[0041] The emulsifier is a mixture of a non-ionic emulsifier AE-200 and an anionic emulsifier M-10S, with a mass ratio of 1:2, sourced from Shanghai Zhongcheng Fine Chemical Co., Ltd.

[0042] Chitosan: The degree of deacetylation is ≥95%, sourced from Shanghai Yuanye Bio-Technology Co., Ltd.

[0043] The wood to be treated is masson pine, sourced from Shanghai Nanqi Industry Co., Ltd.

[0044] All the following "parts" are by mass.

[0045] Example 1: A preparation method of an insect-proof and anti-corrosion liquid for wood, comprising the following processes:

[0046] Step (1) Preparation of isothiazolinone derivative:

[0047] Take methyl bromoundecanoate and acetonitrile, mix them, stir and add isothiazolinone, heat up to 88 °C, condense, and reflux for 7.5 h; remove the solvent acetonitrile by vacuum distillation, wash with acetone, and vacuum dry at 57 °C for 4.5 h to obtain a quaternized product; the ratio of methyl bromoundecanoate to acetonitrile is 35 g:100 mL; the molar ratio of methyl bromoundecanoate to isothiazolinone is 1:1.1.

[0048] Take benzene and methanol (the volume ratio of benzene to methanol is 3:1), add the quaternized product and 2-methylallylamine, stir, heat up to 80 °C, condense and reflux, and react for 9.5 h; remove the solvent methanol by vacuum distillation, extract with ether, and dry at 57 °C for 3.5 h to obtain an amidated product, denoted as isothiazolinone derivative; the mass ratio of the quaternized product to 2-methylallylamine is 10:0.43; the ratio of the quaternized product to methanol is 10 g:10 mL.

[0049] Step (2) Preparation of component A:

[0050] Mix the emulsifier and deionized water, heat to 75 °C in a nitrogen atmosphere, slowly add the isothiazolinone derivative, butyl acrylate, methyl methacrylate, acrylic acid, and 60% of the initiator by mass within 60 min. After adding, raise the temperature to 83 °C and react for 100 min; add the acrylic resin and the remaining initiator by mass, continue to react for 3.0 h, disperse at a speed of 500 r / s for 10 min, and dilute with water to a solid content of 1% to obtain Component A; Component A is prepared from the following mass components: 10 parts of acrylic resin, 3 parts of isothiazolinone derivative, 8.0 parts of butyl acrylate, 8.0 parts of methyl methacrylate, 2 parts of acrylic acid, 0.9 part of initiator potassium persulfate KPS, 0.38 part of emulsifier, and 38 parts of deionized water;

[0051] Step (3) Modification of chitosan:

[0052] Take 1 wt% acetic acid solution, add 1 g of chitosan, stir to dissolve, add 5-thiazolecarboxaldehyde, and stir to react for 160 min; add 1 wt% sodium hydroxide solution, let stand for precipitation, filter, wash, and dry to obtain modified chitosan; the ratio of chitosan to acetic acid solution is 1 g / 100 mL; the mass ratio of chitosan to 5-thiazolecarboxaldehyde is 10:23;

[0053] Step (4) Preparation of Component B:

[0054] Take 1 wt% acetic acid solution and modified chitosan, add copper borate (added in the form of an aqueous solution, and the mass concentration of the copper borate aqueous solution is 5%), and stir to obtain Component B; the ratio of modified chitosan, copper borate, and acetic acid solution is 1.0 g:0.1 g:50 mL;

[0055] An application of an insect-proof and anti-corrosion liquid on wood specifically includes the following process:

[0056] Vacuum the wood to be treated for 10 min with a vacuum degree of 0.080 MPa; impregnate in Component B for 20 min, pressurize to 1.4 MPa, continue to impregnate for 20 min, and take out; impregnate in Component A for 20 min, pressurize to 1.4 MPa, continue to impregnate for 30 min, and take out; dry at room temperature for 24 h, dry at 60 °C for 5 h, and raise the temperature to 100 °C for drying for 4 h.

[0057] Example 2: A preparation method of an insect-proof and anti-corrosion liquid for wood includes the following process:

[0058] Step (1) Preparation of isothiazolinone derivative:

[0059] Mix methyl 11-bromoundecanoate and acetonitrile, stir and add isothiazolinone. Heat to 90 °C, condense and reflux for 8 h. Distill off the solvent acetonitrile under reduced pressure, wash with acetone, and dry in vacuo at 60 °C for 4 h to obtain the quaternized product. The ratio of methyl 11-bromoundecanoate to acetonitrile is 35 g:100 mL; the molar ratio of methyl 11-bromoundecanoate to isothiazolinone is 1:1.3.

[0060] Mix benzene and methanol (the volume ratio of benzene to methanol is 3:1), add the quaternized product and 2-methylallylamine, stir, heat to 82 °C, condense and reflux for 10 h. Distill off the solvent methanol under reduced pressure, extract with ether, and dry at 60 °C for 4 h to obtain the amidated product, denoted as isothiazolinone derivative. The mass ratio of the quaternized product to 2-methylallylamine is 10:0.44; the ratio of the quaternized product to methanol is 10 g:10 mL.

[0061] Preparation of component A in step (2):

[0062] Mix the emulsifier and deionized water, heat to 78 °C under a nitrogen atmosphere, slowly add the isothiazolinone derivative, butyl acrylate, methyl methacrylate, acrylic acid, and 62% of the initiator by mass of the components within 60 min. After adding, heat to 85 °C and react for 120 min. Add the acrylic resin and the remaining initiator by mass of the components, continue to react for 3.2 h, disperse at a speed of 600 r / s for 8 min, and dilute with water to a solid content of 1% to obtain component A. Component A is prepared from the following mass components: 20 parts of acrylic resin, 4 parts of isothiazolinone derivative, 8.5 parts of butyl acrylate, 8.5 parts of methyl methacrylate, 2 parts of acrylic acid, 0.95 part of initiator potassium persulfate KPS, 0.42 part of emulsifier, and 42 parts of deionized water.

[0063] Modification of chitosan in step (3):

[0064] Take 1 wt% acetic acid solution, add 1 g of chitosan, stir to dissolve, add 5-thiazolecarboxaldehyde, and stir to react for 80 min. Add 1 wt% sodium hydroxide solution, let stand for precipitation, filter, wash, and dry to obtain modified chitosan. The ratio of chitosan to acetic acid solution is 1 g / 100 mL; the mass ratio of chitosan to 5-thiazolecarboxaldehyde is 10:23.5.

[0065] Preparation of component B in step (4):

[0066] Mix 1 wt% acetic acid solution and modified chitosan, add copper borate (added in the form of an aqueous solution, the mass concentration of the copper borate aqueous solution is 5%), and stir to obtain component B. The ratio of modified chitosan, copper borate, and acetic acid solution is 1.0 g:0.2 g:50 mL.

[0067] Application of an insect-proof and anti-corrosion liquid on wood, specifically including the following processes:

[0068] Vacuumize the wood to be treated for 20 min with a vacuum degree of 0.088 MPa; impregnate it in component B for 25 min, pressurize to 1.2 MPa, continue impregnating for 30 min, and then take it out; impregnate it in component A for 25 min, pressurize to 1.2 MPa, continue impregnating for 45 min, and then take it out; dry at room temperature for 24 h, dry at 70 °C for 4 h, and raise the temperature to 105 °C and dry for 3 h.

[0069] Example 3: A preparation method of an insect-proof and anti-corrosion liquid for wood, including the following processes:

[0070] Step (1) Preparation of isothiazolinone derivative:

[0071] Take methyl bromoundecanoate and acetonitrile, mix them, stir and add isothiazolinone, raise the temperature to 92 °C, condense and reflux for 8.5 h; remove the solvent acetonitrile by vacuum distillation, wash with acetone, and dry in vacuum at 63 °C for 3.5 h to obtain the quaternized product; the ratio of methyl bromoundecanoate to acetonitrile is 35 g:100 mL; the molar ratio of methyl bromoundecanoate to isothiazolinone is 1:1.5;

[0072] Take benzene and methanol (volume ratio of benzene to methanol is 3:1), add the quaternized product and 2-methylallylamine, stir, raise the temperature to 85 °C, condense and reflux, and react for 10.5 h; remove the solvent methanol by vacuum distillation, extract with ether, and dry at 63 °C for 4.5 h to obtain the amidated product, denoted as isothiazolinone derivative; the mass ratio of the quaternized product to 2-methylallylamine is 10:0.45; the ratio of the quaternized product to methanol is 10 g:10 mL;

[0073] Step (2) Preparation of component A:

[0074] Take an emulsifier and deionized water, mix them, heat to 80 °C in a nitrogen atmosphere, slowly add the isothiazolinone derivative, butyl acrylate, methyl methacrylate, acrylic acid, and 65% of the initiator by mass of the components within 60 min. After adding, raise the temperature to 87 °C and react for 150 min; add acrylic resin and the remaining initiator by mass of the components, continue to react for 3.5 h, disperse at a speed of 720 r / s for 5 min, and dilute with water to a solid content of 1% to obtain component A; Component A is prepared from the following mass components: 30 parts of acrylic resin, 5 parts of isothiazolinone derivative, 9.0 parts of butyl acrylate, 9.0 parts of methyl methacrylate, 2 parts of acrylic acid, 1.0 part of initiator potassium persulfate KPS, 0.46 part of emulsifier, and 46 parts of deionized water;

[0075] Step (3) Modification of chitosan:

[0076] Take 1 wt% acetic acid solution, add 1 g of chitosan, stir to dissolve, add 5-thiazolecarboxaldehyde, and stir for reaction for 200 min; add 1 wt% sodium hydroxide solution, let it stand for precipitation, filter by suction, wash, and dry to obtain modified chitosan; the ratio of chitosan to acetic acid solution is 1 g / 100 mL; the mass ratio of chitosan to 5-thiazolecarboxaldehyde is 10:24;

[0077] Step (4) Preparation of component B:

[0078] Take 1 wt% acetic acid solution and modified chitosan and mix them, add copper borate (added in the form of an aqueous solution, and the mass concentration of the copper borate aqueous solution is 5%), stir to obtain component B; the ratio of modified chitosan, copper borate, and acetic acid solution is 1.0 g:0.3 g:50 mL;

[0079] An application of an insect-proof and anti-corrosion liquid on wood specifically includes the following process:

[0080] Vacuumize the wood to be treated for 30 min, with a vacuum degree of 0.095 MPa; impregnate it in component B for 30 min, pressurize to 1.0 MPa, continue to impregnate for 40 min, and take it out; impregnate it in component A for 30 min, pressurize to 1.0 MPa, continue to impregnate for 60 min, and take it out; dry at room temperature for 24 h, dry at 80 °C for 3 h, and raise the temperature to 110 °C and dry for 2 h.

[0081] Comparative Example 1: A preparation method of an insect-proof and anti-corrosion liquid for wood, including the following process:

[0082] Step (1) Preparation of isothiazolinone derivative:

[0083] Take methyl bromoundecanoate and acetonitrile and mix them, stir and add triethylamine, raise the temperature to 92 °C, condense, and reflux for reaction for 8.5 h; remove the solvent acetonitrile by vacuum distillation, wash with acetone, and vacuum dry at 63 °C for 3.5 h to obtain a quaternized product; the ratio of methyl bromoundecanoate to acetonitrile is 35 g:100 mL; the molar ratio of methyl bromoundecanoate to triethylamine is 1:1.5;

[0084] Take benzene and methanol and mix them (the volume ratio of benzene to methanol is 3:1), add the quaternized product and 2-methylallylamine, stir, raise the temperature to 85 °C, condense and reflux, and react for 10.5 h; remove the solvent methanol by vacuum distillation, extract with ether, and dry at 63 °C for 4.5 h to obtain an amidated product, denoted as isothiazolinone derivative; the mass ratio of the quaternized product to 2-methylallylamine is 10:0.45; the ratio of the quaternized product to methanol is 10 g:10 mL;

[0085] Steps (2-4) are the same as those in Example 3 to obtain component A and component B;

[0086] The application of an insect-proof and anti-corrosion liquid on wood is the same as that in Example 1, and anti-corrosion wood is obtained.

[0087] Comparative Example 2: A preparation method of an insect-proof and anti-corrosion liquid for wood, including the following process:

[0088] Step (1) Preparation of component A:

[0089] Take an emulsifier and deionized water and mix them. In a nitrogen atmosphere, heat to 80 °C, slowly add 2-methylallylamine, butyl acrylate, methyl methacrylate, acrylic acid, and 65% of the initiator by mass of the components, and add them within 60 minutes. After adding, raise the temperature to 87 °C and react for 150 minutes; add acrylic resin and the remaining initiator by mass of the components, and continue to react for 3.5 hours. Disperse at a speed of 720 r / s for 5 minutes, and dilute with water to a solid content of 1% to obtain component A; Component A is prepared from the following mass components: 30 parts of acrylic resin, 5 parts of 2-methylallylamine, 9.0 parts of butyl acrylate, 9.0 parts of methyl methacrylate, 2 parts of acrylic acid, 1.0 part of initiator potassium persulfate KPS, 0.46 part of emulsifier, and 46 parts of deionized water;

[0090] Steps (2-3) are the same as steps (3-4) in Example 3 to obtain component B;

[0091] The application of an insect-proof and anti-corrosion liquid on wood is the same as that in Example 1, and anti-corrosion wood is obtained.

[0092] Comparative Example 3: A preparation method of an insect-proof and anti-corrosion liquid for wood, including the following process:

[0093] Step (2) Preparation of component B:

[0094] Take 1 wt% acetic acid solution and chitosan and mix them. Add copper borate (added in the form of an aqueous solution, and the mass concentration of the copper borate aqueous solution is 5%), and stir to obtain component B; The ratio of chitosan, copper borate, and acetic acid solution is 1.0 g: 0.3 g: 50 mL;

[0095] Step (1) is the same as step (1) in Comparative Example 2 to obtain component A;

[0096] The application of an insect-proof and anti-corrosion liquid on wood is the same as that in Example 1, and anti-corrosion wood is obtained.

[0097] Comparative Example 4: A preparation method of an insect-proof and anti-corrosion liquid for wood, including the following process:

[0098] Component A is an acrylic resin with a solid content of 1%;

[0099] Component B is a copper borate solution with a solid content of 0.6%;

[0100] The application of an insect - proof and anti - decay liquid on wood is the same as that in Example 1 to obtain anti - decay wood.

[0101] Experiment: Take the anti - decay wood obtained in Examples 1 - 3 and Comparative Examples 1 - 4 to prepare specimens, and detect and record the test results of their properties respectively:

[0102] Anti - leaching performance test: Weigh the wood to be treated, the wood treated with Component B, and the wood treated with Component BA (anti - decay wood without drying and baking) in the above specific embodiments in sequence, denoted as M1, M2, and M3. Then place the anti - decay wood specimens after drying and baking in 150 mL of deionized water, stir at a speed of 200 r / min for 14 d. During this period, replace the deionized water every 6 h, 24 h, 48 h × 6 times, and 18 h. Preserve the replaced liquid as the leached water to be tested, detect the copper ion concentration of the tested solution, and calculate its leaching rate L = M A / (M3 - M2)×100%, the total mass M of copper borate in the leached water A = the mass fraction C of copper borate in the leached water A × dilution volume multiple n × leached water volume V A , and the specimen size is 20 mm × 20 mm × 20 mm;

[0103] Anti - decay performance test: Taking GB / T 13942.1 as the reference standard, place the specimens in a sterile condition on the feeding wood covered with hyphae (Poria vaporaria), and be infected by the fungus for 12 w; observe the corrosion degree of the specimens after the test: Grade I is highly decay - resistant, and the mass loss rate of the specimen < 10%; Grade II is decay - resistant, and the mass loss rate of the specimen is 11% - 24%; Grade III is slightly decay - resistant, and the mass loss rate of the specimen is 25% - 44%; Grade IV is not decay - resistant, and the mass loss rate of the specimen > 45%;

[0104] Insect - proof performance test: Taking GB / T 18260 as the reference standard, place the specimens in a culture bottle, and put 500 termites in it. Place it in an environment of 28℃, 80RH%, and in the dark for 4 w; observe the degree of termite damage of the specimens after the test: Grade 10 is intact; Grade 9.5 has slight trace damage; Grade 9 has slight damage, and the cross - sectional area < 3%; Grade 8 has medium damage, and the cross - sectional area is 3% - 10%; Grade 7 has severe damage, and the cross - sectional area is 30% - 50%; Grade 6 has very severe damage, and the cross - sectional area is 50% - 75%;

[0105] Dimensional stability test: Equilibrate the specimens at room temperature for 21 d, measure their tangential, radial, and longitudinal dimensions; soak them in distilled water for 30 min, take them out and measure their dimensions again, and calculate the volume swelling rate of the specimens as the performance index of dimensional stability.

[0106]

[0107] Based on the data in the above table, the following conclusions can be clearly obtained:

[0108] The preservative-treated wood obtained in Examples 1-3 is compared with the preservative-treated wood obtained in Comparative Examples 1-4. From the test results,

[0109] Compared with the comparative examples, the preservative-treated wood obtained in Examples 1-3 has higher anti-corrosion grade, insect-proof grade data, and lower volume swelling rate due to moisture, which fully demonstrates that the insect-proof and anti-corrosion liquid prepared by the present invention has achieved improvements in the anti-corrosion, insect-proof, anti-leaching, and dimensional stability performance of wood.

[0110] Compared with Example 1, the composition of the quaternized product in Comparative Example 1 is different; in Comparative Example 2, the isothiazolinone derivative is replaced with an equal mass of 2-methylallylamine; on the basis of Comparative Example 2, the chitosan in Comparative Example 3 is not modified; in Comparative Example 4, Component A is an acrylic resin and Component B is a boric acid copper solution; for the preservative-treated wood obtained in Comparative Examples 1-4, its anti-corrosion grade, insect-proof grade, and volume swelling rate due to moisture deteriorate. It can be seen that the configuration of Component A, Component B, and its process in the present invention can promote the improvement of the anti-corrosion, insect-proof, anti-leaching, and dimensional stability performance of the insect-proof and anti-corrosion liquid prepared.

[0111] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise", or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device including a series of elements not only includes those elements but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article, or device.

[0112] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A method for preparing an insect-proof and anti-corrosion liquid for wood, characterized in that: The insect-proof and anti-corrosion liquid comprises component A and component B; Component A is prepared by the following process: Take an emulsifier and deionized water and mix them. In a nitrogen atmosphere, heat to 75 - 80 °C, slowly add isothiazolinone derivative, butyl acrylate, methyl methacrylate, acrylic acid, and 60% - 65% of the initiator by the mass of the component, and finish adding within 60 min. After adding, raise the temperature to 83 - 87 °C and react for 100 - 150 min; Add acrylic resin and the remaining initiator by the mass of the component, continue to react for 3.0 - 3.5 h, disperse at a rotation speed of 500 - 720 r / s for 5 - 10 min, and dilute with water to a solid content of 1% to obtain component A; Component B includes the following mass components: 10 parts of chitosan and 0.1 - 0.3 part of copper borate; The isothiazolinone derivative is prepared by the following process: Take methyl bromoundecanoate and acetonitrile and mix them. Stir and add isothiazolinone, raise the temperature to 88 - 92 °C, condense, and reflux for 7.5 - 8.5 h to obtain a quaternized product; Take benzene and methanol and mix them. Add the quaternized product and 2-methylallylamine, stir, raise the temperature to 80 - 85 °C, condense and reflux, and react for 9.5 - 10.5 h to obtain the isothiazolinone derivative; The chitosan is modified. The specific modification process is as follows: Take an acetic acid solution, add chitosan, stir and dissolve it, add 5-thiazolecarboxaldehyde, and stir and react for 160 - 200 min; add a sodium hydroxide solution, let it stand for precipitation, filter by suction, wash, and dry to obtain modified chitosan.

2. The preparation method of an insect-proof and anti-corrosion liquid for wood according to claim 1, characterized in that: Component A is prepared from the following mass components: 10 - 30 parts of acrylic resin, 3 - 5 parts of isothiazolinone derivative, 8.0 - 9.0 parts of butyl acrylate, 8.0 - 9.0 parts of methyl methacrylate, 2 parts of acrylic acid, 0.9 - 1.0 part of initiator, 0.38 - 0.46 part of emulsifier, and 38 - 46 parts of deionized water.

3. The preparation method of an insect-proof and anti-corrosion liquid for wood according to claim 1, characterized in that: The molar ratio of methyl bromoundecanoate to isothiazolinone is 1:(1.1 - 1.5).

4. The preparation method of an insect-proof and anti-corrosion liquid for wood according to claim 1, characterized in that: The mass ratio of the quaternized product to 2-methylallylamine is 10:(0.43 - 0.45).

5. The preparation method of an insect-proof and anti-corrosion liquid for wood according to claim 1, characterized in that: The mass ratio of chitosan to 5-thiazolecarboxaldehyde is 10:(23 - 24).

6. The preparation method of an insect-proof and anti-corrosion liquid for wood according to claim 1, characterized in that: Component B is prepared by the following process: Take an acetic acid solution and modified chitosan and mix them, add copper borate, and stir to obtain component B.

7. The preparation method of an insect-proof and anti-corrosion liquid for wood according to claim 6, characterized in that: The ratio of the modified chitosan, copper borate, and acetic acid solution is 1.0 g:(0.1 - 0.3) g:50 mL.

8. Use of an insect and decay resistant liquid for wood prepared by the preparation method according to any one of claims 1-7, characterized in that: The insect-proof and anti-corrosion liquid is applied to wood by vacuum impregnation. The specific process includes the following: Vacuumize the wood to be treated for 10 - 30 min, and the vacuum degree is 0.080 - 0.095 MPa; Impregnate in component B for 20 - 30 min, pressurize to 1.0 - 1.4 MPa, continue to impregnate for 20 - 40 min, and take out; Impregnate in component A for 20 - 30 min, pressurize to 1.0 - 1.4 MPa, continue to impregnate for 30 - 60 min, and take out; Dry at room temperature for 24 h, dry at 60 - 80 °C for 3 - 5 h, and raise the temperature to 100 - 110 °C and dry for 2 - 4 h.

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