Two-component composition as well as preparation method and application thereof

Abstract

The invention relates to a two-component composition as well as a preparation method and application thereof, and belongs to the technical field of woodware seal primers. The double-component composition provided by the invention comprises a component A and a component B, the component A comprises epoxy resin (1a) containing an aromatic ring structure and more than two epoxy groups and silane (1b) containing one epoxy group; in the component A, the weight of the silane (1b) accounts for 18-60 wt% of the total weight of the epoxy resin (1a) and the silane (1b); the component B comprises silane (1c) containing one amino group and substituted phenol (1d) with a specific structure; and in the component B, the weight of the substituted phenol (1d) accounts for 0.3-10 wt% of the total weight of the silane (1c) and the substituted phenol (1d). The double-component composition disclosed by the invention can realize dual curing, is high in crosslinking density, has the advantages of excellent surface effect, sanding property, flexibility, sealing property and wood warming effect, does not contain a solvent or only has low solvent content, and is particularly suitable for woodware seal primer.

Description

Technical Field

[0001] The present invention relates to the technical field of woodware sealing primers, and particularly to a two-component composition, a preparation method and an application thereof. Background Art

[0002] With the increasing emphasis on environmental protection in the coating industry, the use of coatings containing high volatile organic compounds (VOCs) is also facing more and more restrictions. The VOCs in coatings mainly come from organic solvents. When the coatings dry and form films, the organic solvents volatilize to produce substances harmful to the human body. Traditional solvent-based woodware coatings contain a large amount of organic solvents, which are harmful to the environment and health. Therefore, the development of environmentally friendly woodware coatings with low VOCs is an inevitable trend.

[0003] The first primer directly coated on the woodware substrate is the key to affecting the quality of the woodware coating film. However, after applying traditional woodware primers on the woodware substrate, the lignin, cellulose and other ducts in the woodware substrate are prone to swelling phenomenon, resulting in substances such as tannic acid and grease in the woodware substrate infiltrating into the coating film, causing the coating film to turn yellow and discolor after drying.

[0004] To solve the above problems, in the prior art, most water-based woodware one-component or two-component sealing primers containing acrylic emulsions / resins / dispersions are used to coat the surface of the woodware substrate. For example, the water-based primer for woodware enamel sealing disclosed in Patent CN104761992B, the water-based woodware sealing primer disclosed in CN105295607B, the water-based woodware sealing primer of CN105602377B, and the two-component water-based woodware sealing primer used in the two-component water-based woodware coating structure for preventing color bleeding of red oak disclosed in CN109111835B. However, the crosslinking density of these water-based woodware sealing primers is not high, resulting in the sealing property of these water-based woodware sealing primers being significantly worse than that of the solvent-based system, and the effects of preventing swelling and preventing tannic acid are not good; in addition, the drying speed of these water-based woodware sealing primers is also relatively slow, and multiple coatings are often required to achieve the effect of single coating of the solvent-based system. Moreover, due to the relatively high glass transition temperature of the water-based acrylic resins used in these water-based woodware sealing primers, more film-forming aids need to be added to the water-based woodware sealing primer formulations. Although the VOC content is much lower than that of the solvent-based system, there is still room for further reduction. Summary of the Invention

[0005] Based on this, the object of the present invention is to overcome the defects or deficiencies of the prior art, and provide a two-component composition, a preparation method and an application thereof. The coating film prepared from the two-component composition has the advantages of excellent surface effect, sandability, flexibility, sealing property and warm wood effect. At the same time, the two-component composition contains no solvents or only a low content of organic solvents, and can be widely used as a composition in woodware sealing primers to improve the performance of woodware coatings.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] The present invention provides a two-component composition, comprising component A and component B; wherein:

[0008] Component A comprises an epoxy resin (1a) and a silane (1b); the epoxy resin (1a) contains an aromatic ring structure and contains more than two epoxy groups; the epoxy resin (1a) includes at least one of bisphenol A epoxy resin, bisphenol F epoxy resin, and novolac epoxy resin; the silane (1b) is a silane containing one epoxy group; in component A, the weight of the silane (1b) accounts for 18-60 wt% of the total weight of the epoxy resin (1a) and the silane (1b);

[0009] Component B comprises a silane (1c) and a substituted phenol (1d); the silane (1c) is a silane containing one amino group; the substituted phenol (1d) includes at least one of the compounds of formula (1); in component B, the weight of the substituted phenol (1d) accounts for 0.3-10 wt% of the total weight of the silane (1c) and the substituted phenol (1d);

[0010]

[0011] R1, R2, R3, R4, R5, and R6 in formula (1) are each independently an alkyl group having 1 to 4 carbon atoms.

[0012] The inventors of the present invention have repeatedly studied and found that the epoxy resin (1a) in component A contains an aromatic ring structure, has a relatively high glass transition temperature, and has a relatively fast physical drying rate. When the two-component compound is used as a wood sealer primer, it can improve the drying property of the wood sealer primer; and the epoxy resin (1a) contains more than two (including two) epoxy groups, which can crosslink with the active N-H on the amino group in the silane (1c) in component B to increase the crosslinking density. The silane (1b) in component A contains an epoxy group that can crosslink with the active N-H on the amino group in the silane (1c) in component B, and has a very low viscosity, so that the viscosity of component A obtained by mixing the epoxy resin (1a) and the silane (1b) is relatively low, which is convenient for construction. At the same time, the silicon alkyl groups in the silane (1b) and the silane (1c) can undergo hydrolysis crosslinking with the moisture in the air and the wood substrate, or crosslink with the hydroxyl groups rich on the surface of the wood substrate to form a dense crosslinking network, and cooperate with the crosslinking curing of the epoxy group and the active N-H on the amino group to form a double curing to further increase the crosslinking density, so it has excellent sealing properties. The two-component composition of the present invention can be formulated without or with less organic solvents, so it has a very low organic solvent content.

[0013] The inventors of the present invention have found that the weight of silane (1b) in component A accounts for 18-60 wt% of the total weight of epoxy resin (1a) and silane (1b) to achieve the effects of the present invention. If the proportion of silane (1b) is too low, the surface effect and sandability of the coating film are poor; if the proportion of silane (1b) is too high, the crosslinking density after hydrolysis of silane (1b) is too high, resulting in poor flexibility of the coating film.

[0014] The inventors of the present invention have also found that it is necessary to use silane (1c) containing one amino group to achieve the effects of the present invention. If silane containing multiple amino groups is used, the sandability of the coating film will be poor, probably because the surface of silane with multiple amino groups cures too fast, forming a skin that isolates water vapor in the air and prevents further hydrolysis reaction of the silane groups inside the coating film.

[0015] The inventors of the present invention have also surprisingly found that the substituted phenol (1d) in component B plays an irreplaceable role in improving the sandability of the coating film. The weight of the substituted phenol (1d) in component B accounts for 0.3-10 wt% of the total weight of silane (1c) and substituted phenol (1d) to achieve the effects of the present invention. If component B does not contain substituted phenol (1d) or the content of substituted phenol (1d) is too low, the sandability of the coating film will be poor; if the content of substituted phenol (1d) is too high, the two-component reaction is too fast and the pot life becomes shorter; while using other common tertiary amine accelerators, or using a combination of tertiary amine and alkylphenol, cannot achieve the effect of promoting the sandability of the coating film by substituted phenol (1d).

[0016] As a preferred embodiment of the present invention, considering the low cost and easy availability of the materials, the epoxy resin (1a) is preferably bisphenol A epoxy resin or phenolic epoxy resin. If the viscosity of the epoxy resin (1a) is too high, it will be unfavorable for construction operations, or too much organic solvent needs to be added, resulting in an increase in VOC emissions; the epoxy resin (1a) preferably used in the present invention is bisphenol A epoxy resin or phenolic epoxy resin that is liquid at room temperature, such as NPEL-128, NPEL-134, NPPN-631, etc. of South Asia.

[0017] As a preferred embodiment of the present invention, the silane (1b) includes at least one of the compound of formula (2) and the compound of formula (3);

[0018]

[0019] Among them, R7, R8, and R9 in formula (2) are each independently methyl or ethyl, and the statistical average value of x is 2-9; R 10 , R 11 , R 12 are each independently methyl or ethyl, and the statistical average value of y is 2-9.

[0020] As a more preferred embodiment of the present invention, considering the low cost and easy availability of the materials, the silane (1b) is preferably 3-glycidoxypropyltrimethoxysilane (CAS: 2530-83-8) and / or 3-glycidoxypropyltriethoxysilane (CAS: 2602-34-8).

[0021] As a preferred embodiment of the present invention, the silane (1c) includes at least one of the compounds of formula (4);

[0022]

[0023] R in formula (4) 13 、R 14 、R 15 are each independently methyl or ethyl.

[0024] As a more preferred embodiment of the present invention, considering the low cost and easy availability of the materials, the silane (1c) is preferably 3-aminopropyltrimethoxysilane (CAS: 13822-56-5) and / or 3-aminopropyltriethoxysilane (CAS: 919-30-2).

[0025] The two-component composition of the present invention may not add or add less organic solvent. When the two-component composition of the present invention is selected to add an organic solvent according to actual needs, the component A and / or the component B further includes an organic solvent. By adding an organic solvent to the component A and / or the component B, the film-forming property of the two-component composition can be improved and the drying rate can be adjusted.

[0026] Furthermore, the weight of the organic solvent in the component A and / or the component B is 0.01-30 wt% of the total weight of the two-component composition. If the addition amount of the organic solvent is too much, the drying rate will decrease, and the VOC content in the two-component composition system will increase.

[0027] Furthermore, the organic solvent is at least one of alcohol ethers, alcohols, ethers, esters, and ketone co-solvents. Preferably, the organic solvent is an alcohol ether solvent, such as dipropylene glycol monomethyl ether, dipropylene glycol monobutyl ether, propylene glycol butyl ether, ethylene glycol butyl ether, etc.

[0028] Furthermore, the ratio of the total weight of the epoxy resin (1a) and the silane (1b) in the component A to the weight of the silane (1c) in the component B is 1:1 to 4:1. If the above ratio is too high or too low, too many active N-H on the epoxy groups or amino groups will not participate in the cross-linking reaction, resulting in a decrease in the cross-linking density and affecting the sealing effect of the two-component composition as a woodware sealing primer.

[0029] The present invention also provides an application of any of the above-mentioned two-component compositions in a woodware (two-component) sealing primer.

[0030] By mixing the component A and the component B, the obtained two-component composition is directly applied to a woodware substrate as a woodware sealing primer.

[0031] Furthermore, the woodware (two-component) sealing primer is a woodware (two-component) sealing primer with a low solvent content, the organic solvent content < 20 wt%, preferably the organic solvent content < 10 wt%, and more preferably the solvent content < 5 wt%.

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] The two-component composition of the present invention can achieve dual curing, has a high crosslinking density, and has the advantages of excellent surface effect, sandability, flexibility, sealing property, and warm wood effect. At the same time, it does not contain organic solvents or only has a low content of organic solvents, and is particularly suitable for woodware sealing primers. Specific Embodiments

[0034] The present invention will be further described below in conjunction with embodiments. These embodiments are only used to illustrate the present invention and not to limit the scope of the present invention. The experimental methods without specific conditions in the following examples are usually carried out according to the conventional conditions in the art or according to the conditions recommended by the manufacturer; the raw materials, reagents, etc. used, unless otherwise specified, are all raw materials and reagents that can be obtained from commercial channels such as conventional markets. Any non-substantive changes and substitutions made by those skilled in the art based on the present invention fall within the scope of protection required by the present invention.

[0035] The raw materials used in the following examples or comparative examples:

[0036] (1) Epoxy resin (1a):

[0037] NPEL-128: South Asia, bisphenol A epoxy resin, epoxy equivalent is 184 - 190.

[0038] NPEL-134: South Asia, bisphenol A epoxy resin, epoxy equivalent is 230 - 270.

[0039] NPES-901: South Asia, bisphenol A epoxy resin, epoxy equivalent is 450 - 500.

[0040] NPEF-170: South Asia, bisphenol F epoxy resin, epoxy equivalent is about 160 - 180.

[0041] NPPN-631: South Asia, phenol novolac epoxy resin, epoxy equivalent is about 168 - 178.

[0042] (2) Epoxy resin (2a):

[0043] XY518: Anhui Xinyuan, hydrogenated bisphenol A epoxy resin, epoxy equivalent is about 208 - 233.

[0044] (3) Silane (1b):

[0045] GX - 560: Anhui Guibao, 3 - glycidoxypropyltrimethoxysilane, CAS: 2530 - 83 - 8.

[0046] GX - 561: Anhui Guibao, 3 - glycidoxypropyltriethoxysilane, CAS: 2602 - 34 - 8.

[0047] KBM - 4803: Shin - Etsu of Japan, 8 - glycidoxyoctyltrimethoxysilane, CAS: 1239602 - 38 - 0.

[0048] KBM - 303: Shin - Etsu of Japan, 2 - (3,4 - epoxycyclohexyl)ethyltrimethoxysilane, CAS: 3388 - 04 - 3.

[0049] (4) Silane (1c):

[0050] GX - 550: Anhui Guibao, 3 - aminopropyltriethoxysilane, CAS: 919 - 30 - 2.

[0051] GX - 540: Anhui Guibao, 3 - aminopropyltrimethoxysilane, CAS: 13822 - 56 - 5.

[0052] (5) Silane (2c):

[0053] GX - 792: Anhui Guibao, N - (β - aminoethyl)-γ - aminopropyltrimethoxysilane, CAS: 1760 - 24 - 3.

[0054] (6) Organic solvent:

[0055] DPM: Dow Chemical, dipropylene glycol monomethyl ether, CAS: 34590 - 94 - 8.

[0056] (7) Substituted phenol (1d):

[0057] DMP - 30: 2,4,6 - tris(dimethylaminomethyl)phenol, CAS: 90 - 72 - 2.

[0058] 2,4,6 - tris(di - n - butylaminomethyl)phenol: The structure conforms to formula (1), and R1, R2, R3, R4, R5, R6 are all n - butyl; The synthesis method of 2,4,6 - tris(di - n - butylaminomethyl)phenol is as follows:

[0059] In a four-necked flask equipped with a reflux condenser and a stirrer, 94.1 g of phenol (1 mol) and 700 g of ethanol were added and stirred until dissolved. 284 g of a 37% aqueous solution of formaldehyde (3.5 mol) and 452.3 g of di-n-butylamine (3.5 mol) were slowly added, and concentrated hydrochloric acid was added dropwise to adjust the pH of the system to 3 - 5. The mixture was heated to 60 - 70 °C and stirred under reflux. The reaction progress was monitored by thin-layer chromatography (TLC) until the phenol was completely consumed. After the reaction, it was cooled to room temperature, neutralized to neutral (pH = 7 - 8) with sodium hydroxide solution, extracted with dichloromethane, the organic phases were combined, and dried over anhydrous sodium sulfate. Volatiles were removed by vacuum distillation to obtain a yellow liquid product, 2,4,6-tris(di-n-butylaminomethyl)phenol.

[0060] Examples 1 - 16

[0061] Examples 1 - 16 respectively provide a two-component composition, including component A and component B.

[0062] Among them, for the two-component compositions of each example, the material compositions of component A and component B, the specific selection of each substance, and the mass, please refer to Table 1.

[0063] In the two-component compositions of each example, the proportion of the weight of silane (1b) in component A in the total weight of epoxy resin (1a) and silane (1b), the proportion of the weight of substituted phenol (1d) in component B in the total weight of silane (1c) and substituted phenol (1d), the content of organic solvent in the two-component composition, and the proportion of the total weight of epoxy resin (1a) and silane (1b) in component A to the weight of silane (1c) in component B, please refer to Table 2.

[0064] Examples 1 - 16 also respectively provide a preparation method of a two-component mixture, including the following steps: at 25 ± 2 °C, the substances in component A were mixed according to the formula to obtain component A, the substances in component B were mixed according to the formula to obtain component B, and component A and component B were mixed to obtain the two-component composition.

[0065] Table 1 Two-component composition formula

[0066]

[0067]

[0068] Table 2 Proportions of two-component composition formula

[0069]

[0070]

[0071] Comparative Examples 1 - 9

[0072] Comparative Examples 1-9 each provide a two-component composition, including Component A and Component B.

[0073] Among them, for the two-component compositions of each comparative example, for the material composition of Component A and Component B, the specific selection of each substance, and the mass, please refer to Table 1.

[0074] Among the two-component compositions of each comparative example, the proportion of the weight of silane (1b) in Component A in the total weight of epoxy resin (1a) and silane (1b), the proportion of the weight of substituted phenol (1d) in Component B in the total weight of silane (1c) and substituted phenol (1d), the content of organic solvent in the two-component composition, and the proportion of the total weight of epoxy resin (1a) and silane (1b) in Component A to the weight of silane (1c) in Component B, please refer to Table 2.

[0075] The preparation method of the two-component mixtures of Comparative Examples 1-9 includes the following steps: at 25±2°C, mix the substances in Component A according to the formula to obtain Component A, mix the substances in Component B according to the formula to obtain Component B, and mix Component A and Component B to obtain the two-component composition.

[0076] Comparative Example 10

[0077] Comparative Example 10 provides an aqueous one-component blocking primer. For the material composition of the aqueous one-component blocking primer of this comparative example, the specific selection of each substance, and the parts by weight, please refer to Table 3.

[0078] The preparation method of the aqueous one-component blocking primer of this comparative example includes the following steps: at 25±2°C, mix the substances according to the formula to obtain the aqueous one-component blocking primer.

[0079] Table 3 Formulation of the Aqueous One-Component Blocking Primer of Comparative Example 10

[0080] Material Weight (parts) Type Supplier PA-4853 80 Acrylic emulsion Guanzhi 8817 0.3 Defoamer Matsuo Dipropylene glycol monobutyl ether 3.0 Co-solvent Dow Chemical Dipropylene glycol monomethyl ether 2.5 Co-solvent Dow Chemical Water 9.73 - - OS-1400 0.4 Wetting agent Guanzhi Tego Glide 410 0.2 Leveling agent Evonik HS-2000 1 Polishing aid Dongguan Hanwei BYK LAPONITE S 482 0.1 Bentonite BYK TAFIGEL PUR 65 0.25 Thickener Münzing L-44 2.5 Anti-tannin aid Halox (USA) Rheolate 299 0.02 Rheology aid Elementis

[0081] Performance Test

[0082] The two-component mixtures of Examples 1-16 and Comparative Examples 1-9, and the aqueous one-component blocking primer of Comparative Example 10 were respectively subjected to the following performance tests:

[0083] Construction method: The wood substrate was polished with 240# sandpaper. The two-component compositions of Examples 1-16 and Comparative Examples 1-9 obtained by mixing Component A and Component B at 25±2°C were respectively used as blocking primers and directly sprayed on the wood substrate at 25±2°C; the aqueous one-component blocking primer of Comparative Example 10 was directly sprayed on the wood substrate at 25±2°C. After spraying, it was dried overnight at 25±2°C.

[0084] Surface effect test: After the coating film is completely dry, visually inspect whether the surface of the coating film is transparent and flat, and score it from 1 to 5 points, with 5 points (transparent and flat) being the best.

[0085] Sanding property test: After drying overnight, sand with 400# sandpaper, observe the powdering and sandpaper sticking situation, and score it from 1 to 5 points, with 5 points (more powdering, not sticking to the sandpaper) being the best.

[0086] Thermal cycling test: Conduct the test according to ASTM D1211 method, 50 degrees for 1 hour, room temperature for 0.5 hour, -20 degrees for 1 hour, and room temperature for 0.5 hour as one cycle, and repeat the cycle 10 times. Observe whether the coating film cracks.

[0087] Sealing property test: For the wooden board sprayed with the sealing primer, after the primer is completely dry, sand with 400# sandpaper, spray the water-based white paint, bake at 50°C overnight, and place at room temperature for 3 months to observe the sealing effect. Observe the discoloration situation and score it from 1 to 5 points, with 5 points (no obvious discoloration) being the best.

[0088] Warm wood effect test: Visually inspect the warm wood effect of the coating film and score it from 1 to 5 points, with 5 points (closest to the natural warm color effect of the wood substrate) being the best.

[0089] Please refer to Table 4 for the test results:

[0090] Table 4 Performance test results of the sealing primer

[0091]

[0092]

[0093] The performance test results in Table 4 show that the two-component compositions of Examples 1-16 of the present invention, when sprayed on the surface of the wood substrate as a wood sealing primer, form a coating film with excellent surface effect, sanding property, flexibility, sealing property, and warm wood effect.

[0094] In the two-component composition of Comparative Example 1, the weight ratio of the substituted phenol (1d) in Component B to the total weight of the silane (1c) and the tertiary amine (1d) is too low; in the two-component composition of Comparative Example 2, Component B does not contain the substituted phenol (1d); the sanding properties of the coating films formed by spraying the two-component compositions of Comparative Example 1 and Comparative Example 2 on the surface of the wood substrate as wood sealing primers are both poor.

[0095] In the two-component compositions of Comparative Example 3 and Comparative Example 4, common tertiary amine accelerators (triethylamine, triethanolamine) were used in Component B; in the two-component composition of Comparative Example 5, a tertiary amine (triethylamine) and an alkylphenol (dodecylphenol) were used as accelerators in Component B; substituted phenol (1d) was not used in Component B of the two-component compositions of Comparative Examples 3-5, resulting in poor sandability of the coatings formed by spraying the two-component compositions of Comparative Examples 3-5 on the surface of the wood substrate as wood closed primers.

[0096] In the two-component composition of Comparative Example 6, the proportion of the silane (1b) in Component A in the total weight of the epoxy resin (1a) and the silane (1b) was too high, resulting in poor flexibility of the coating film formed by spraying the two-component composition of Comparative Example 6 on the surface of the wood substrate as a wood closed primer.

[0097] In the two-component composition of Comparative Example 7, the proportion of the silane (1b) in Component A in the total weight of the epoxy resin (1a) and the silane (1b) was too low, resulting in poor surface effect and sandability of the coating film formed by spraying the two-component composition of Comparative Example 7 on the surface of the wood substrate as a wood closed primer.

[0098] In the two-component composition of Comparative Example 8, instead of using the aromatic epoxy resin (1a), an aliphatic epoxy resin (2a) was used in Component A, resulting in poor sandability of the coating film formed by spraying the two-component composition of Comparative Example 8 on the surface of the wood substrate as a wood closed primer.

[0099] In the two-component composition of Comparative Example 9, the silane (1c) having the structure of formula (4) was not used in Component B, resulting in poor surface effect and sandability of the coating film formed by spraying the two-component composition of Comparative Example 9 on the surface of the wood substrate as a wood closed primer.

[0100] The waterborne one-component closed primer of Comparative Example 10 had poor sealing property and warm wood effect of the coating film formed by spraying it on the surface of the wood substrate.

[0101] The above-described embodiments merely represent several implementation manners of the present invention, and their descriptions are relatively specific and detailed, but should not be construed as limiting the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and the present invention also intends to include these modifications and deformations.

Claims

1. A two-component composition, characterized in that: It contains Component A and Component B; wherein: Component A contains: Epoxy resin (1a), the epoxy resin (1a) contains an aromatic ring structure and contains more than two epoxy groups; the epoxy resin (1a) includes at least one of bisphenol A epoxy resin, bisphenol F epoxy resin, and phenolic epoxy resin; Silane (1b), the silane (1b) is a silane containing one epoxy group; In Component A, the weight of the silane (1b) accounts for 18-60 wt% of the total weight of the epoxy resin (1a) and the silane (1b); Component B contains: Silane (1c), the silane (1c) is a silane containing one amino group; Substituted phenol (1d), the substituted phenol (1d) includes at least one of the compounds of formula (1); R1, R2, R3, R4, R5, and R6 in formula (1) are each independently an alkyl group of C1-C4; In Component B, the weight of the substituted phenol (1d) accounts for 0.3-10 wt% of the total weight of the silane (1c) and the substituted phenol (1d).

2. The two-component composition according to claim 1, characterized in that: The silane (1b) includes at least one of the compounds of formula (2) and the compounds of formula (3); Among them, R7, R8, and R9 in formula (2) are each independently methyl or ethyl, and the statistical average value of x is 2-9; R 10 , R 11 , R 12 are each independently methyl or ethyl, and the statistical average value of y is 2-9.

3. The two-component composition according to claim 1, wherein: The silane (1c) includes at least one of the compounds of formula (4); R in formula (4) 13 , R 14 , R 15 are each independently methyl or ethyl.

4. The two-component composition according to claim 1, wherein: The Component A and / or the Component B further contains an organic solvent, and the weight of the organic solvent is 0.01-30 wt% of the total weight of the two-component composition.

5. The two-component composition according to any one of claims 1-4, characterized in that: The ratio of the total weight of the epoxy resin (1a) and the silane (1b) in Component A to the weight of the silane (1c) in Component B is 1:1 to 4:

1.

6. A method for preparing a two-component composition according to any one of claims 1-5, characterized in that: It includes the following steps: Obtained by mixing Component A and Component B.

7. Use of a two-component composition according to any one of claims 1-5 in a wood sealer primer.

8. Use of the two-component composition according to claim 7 in a woodware sealing primer, characterized in that: The two-component composition is used as a wood sealer primer and is applied to a wood substrate.

9. Use of the two-component composition according to claim 7 or 8 in a wood sealer primer, characterized in that: The content of the organic solvent in the wood sealer primer < 20 wt%.

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