Silicon-free artificial board release agent as well as preparation method and application thereof

Abstract

The invention discloses a silicon-free artificial board release agent as well as a preparation method and application thereof, and belongs to the technical field of release agents. The silicon-free artificial board release agent comprises the following components in percentage by mass: 1%-10% of stearyl alcohol polyether-2 potassium phosphate; 1%-10% of potassium stearate; 2%-20% of triethanolamine; 0.5%-2% of a bactericide; and 58%-95.5% of deionized water. According to the silicon-free artificial board release agent disclosed by the invention, under the combined action of the stearyl alcohol polyether-2 potassium phosphate, the potassium stearate and the triethanolamine, the silicon-free artificial board release agent disclosed by the invention has excellent dilution stability, demolding performance and good high-temperature resistance; and the post-coating processing performance of the silicon-free artificial board is also improved.

Description

Technical Field

[0001] The invention relates to the technical field of release agents, and in particular to a silicon-free artificial board release agent and a preparation method and application thereof. Background Art

[0002] Artificial boards are made of wood or other non-wood plants, separated into various unit materials through certain mechanical processing, and then glued together with or without adhesives and other additives to form boards or molded products. They mainly include three categories of products: plywood, particleboard (chipboard) and fiberboard, and there are hundreds of extended products and deep-processed products.

[0003] The environmental protection levels of artificial boards mainly include E1, E0, ENF, etc. These levels are mainly divided according to the formaldehyde emission. Specifically:

[0004] E1 level: Formaldehyde emission ≤ 0.124 mg / m 3 Boards that reach E1 grade can be directly used for interior decoration.

[0005] E0 level: formaldehyde emission ≤ 0.050mg / m 3 , which is stricter than E1 level, usually adopts formaldehyde-free glue technology, has less impact on human health, and is suitable for use by pregnant women and infants.

[0006] ENF level: formaldehyde emission ≤ 0.025mg / m 3 , suitable for places with extremely high environmental protection requirements.

[0007] Common adhesives for artificial boards include phenolic resin adhesives, urea-formaldehyde resin adhesives, isocyanate adhesives, etc. Among them, urea-formaldehyde resin adhesives have the advantages of simple manufacturing process, abundant raw materials, low cost, high bonding strength, no pollution to the board, and fast curing speed. They are currently the most widely used type of adhesive in the production of artificial boards. The principle of urea-formaldehyde resin adhesives for bonding and curing raw materials is mainly physical bonding, that is, urea and formaldehyde gradually dehydrate and condense under certain acidic and alkaline conditions to form a three-dimensional network structure that wraps and solidifies the raw materials together. However, when producing E0 or E1 grade artificial boards, the formula of urea-formaldehyde resin glue will change accordingly, which will lead to problems in the bonding of artificial boards and steel strips, thereby causing equipment downtime and delaying production, resulting in unnecessary economic losses.

[0008] In order to solve the above problems, people often use release agents to effectively separate the artificial board from the steel strip through the isolation layer formed by the release agent. However, the commonly used release agents on the market are mainly modified silicone products, but silicone products often have low surface tension, which is not conducive to subsequent coating processing after adhering to the surface of the artificial board.

[0009] Therefore, there is an urgent need for a new release agent for artificial boards to achieve efficient demoulding of artificial boards and metal steel strips, while improving the post-coating processing performance of artificial boards. Summary of the invention

[0010] In view of this, the technical problem to be solved by the present invention is to provide a silicon-free artificial board release agent and a preparation method and application thereof. The silicon-free artificial board release agent has excellent dilution stability, demoulding performance and good high temperature resistance.

[0011] In order to achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0012] The present invention provides a silicon-free artificial board release agent, which comprises the following components by mass percentage:

[0013] Potassium Steareth-2 Phosphate: 1%-10%;

[0014] Potassium stearate: 1%-10%;

[0015] Triethanolamine: 2%-20%;

[0016] Fungicide: 0.5%-2%;

[0017] Deionized water: 58% - 95.5%.

[0018] The present invention uses potassium steareth-2 phosphate, potassium stearate and triethanolamine as main components, and improves the dilution stability, demoulding performance and high temperature resistance of the silicon-free artificial board release agent through the joint action. The mass percentage of potassium steareth-2 phosphate is preferably 2%-6%; more preferably 2% or 6%.

[0019] The mass percentage of the potassium stearate is preferably 2%-10%; more preferably 2%, 5% or 10%.

[0020] The mass percentage of the triethanolamine is preferably 8%-20%; more preferably 8%, 16% or 20%.

[0021] The mass percentage of the bactericide is preferably 0.5%-1%, and more preferably 0.5%.

[0022] The mass percentage of the deionized water is preferably 73%-90%; more preferably 87.5%, 84.5%, 76.5% or 73.5%.

[0023] More preferably, the silicon-free artificial board release agent of the present invention comprises the following components by mass percentage:

[0024] Potassium Steareth-2 Phosphate: 2%-6%;

[0025] Potassium stearate: 2%-10%;

[0026] Triethanolamine: 8%-20%;

[0027] Fungicide: 0.5%-1%;

[0028] Deionized water: 73%-90%.

[0029] Preferably, the bactericide is selected from s-triazine preservatives and bactericides.

[0030] Preferably, the conductivity of the deionized water is less than 0.50 mS / m.

[0031] The present invention also provides a method for preparing the above-mentioned silicon-free artificial board release agent, comprising the following steps:

[0032] (1) mixing steareth-2 phosphate and deionized water uniformly, adding potassium hydroxide to react to obtain a mixed system S1, mixing potassium stearate and deionized water above 80° C. uniformly, cooling to room temperature, adding triethanolamine and mixing uniformly to obtain a mixed system S2;

[0033] (2) Mix the mixed system S1, the mixed system S2 and the fungicide, add deionized water to make the system 100 g, and mix them evenly to prepare a silicon-free artificial board release agent.

[0034] Preferably, in the present invention, the molar ratio of steareth-2 phosphate to potassium hydroxide in step (1) is 1:1.

[0035] The present invention also provides a silicon-free artificial board, which contains the above-mentioned silicon-free artificial board release agent or the silicon-free artificial board release agent prepared by the above-mentioned preparation method.

[0036] Compared with the prior art, the silicon-free artificial board release agent provided by the present invention comprises the following components by mass percentage: potassium stearyl alcohol polyether-2 phosphate: 1%-10%; potassium stearate: 1%-10%; triethanolamine: 2%-20%; bactericide: 0.5%-2%; deionized water: 58%-95.5%. The silicon-free artificial board release agent has excellent dilution stability, demoulding performance and good high temperature resistance through the joint action of potassium stearyl alcohol polyether-2 phosphate, potassium stearate and triethanolamine, and also improves the post-coating processing performance of the silicon-free artificial board. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 This is the appearance of the potassium steareth-2 phosphate prepared in Example 1 after being baked at a high temperature of 200° C. for 1 hour;

[0038] Figure 2 This is the appearance of potassium stearate after being baked at 200℃ for 1h;

[0039] Figure 3 This is the appearance of a mixture of potassium steareth-2 phosphate and potassium stearate (1:1) after being baked at 200°C for 1 hour. DETAILED DESCRIPTION

[0040] In order to further illustrate the present invention, the silicon-free artificial board release agent provided by the present invention, and its preparation method and application are described in detail below in conjunction with embodiments.

[0041] The following fungicides are all s-triazine preservatives and fungicides.

[0042] The following potassium stearate is a commercially available industrial product, selected from Huzhou Linghu Xinwang Chemical Co., Ltd., Shandong Xinxiong Biotechnology Co., Ltd., etc.

[0043] (I) Preparation of release agent

[0044] Example 1

[0045] Step 1: Mix 2 g of steareth-2 phosphate with 40 g of deionized water, and then stir at 60° C. to dissolve evenly, then add 0.335 g of flaky potassium hydroxide with a mass concentration greater than 85%, and stir to react for 10 minutes.

[0046] Step 2: Dissolve 2 g of potassium stearate and 40 g of deionized water above 80° C., cool to room temperature, and then add 8 g of triethanolamine and stir evenly.

[0047] Step three, mix the solutions of step one and step two, then add 0.5g of fungicide, add deionized water to make the release agent sample 100g, stir evenly to prepare the release agent.

[0048] The performance of the release agent prepared in Example 1 was tested according to the following stability test method and demoulding performance test method. The results are shown in Tables 1 and 2.

[0049] Example 2

[0050] Step 1: Mix 5 g of steareth-2 phosphate with 40 g of deionized water, and then stir at 60° C. to dissolve evenly, then add 0.8375 g of flaky potassium hydroxide with a mass concentration greater than 85%, and stir to react for 10 minutes.

[0051] Step 2: Dissolve 2 g of potassium stearate and 35 g of deionized water above 80° C., cool to room temperature, and then add 8 g of triethanolamine and stir evenly.

[0052] Step three, mix the solutions of step one and step two, then add 0.5g of fungicide, add deionized water to make the release agent sample 100g, stir evenly to prepare the release agent.

[0053] The performance of the release agent prepared in Example 2 was tested according to the following stability test method and demoulding performance test method. The results are shown in Tables 1 and 2.

[0054] Example 3

[0055] Step 1: Mix 2 g of steareth-2 phosphate with 35 g of deionized water, and then stir at 60° C. to dissolve evenly, then add 0.335 g of flaky potassium hydroxide with a mass concentration greater than 85%, and stir to react for 10 minutes.

[0056] Step 2: Dissolve 5 g of potassium stearate and 30 g of deionized water above 80° C., cool to room temperature, and then add 16 g of triethanolamine and stir evenly.

[0057] Step three, mix the solutions of step one and step two, then add 0.5g of fungicide, add deionized water to make the release agent sample 100g, stir evenly to prepare the release agent.

[0058] The performance of the release agent prepared in Example 3 was tested according to the following stability test method and demoulding performance test method. The results are shown in Tables 1 and 2.

[0059] Example 4

[0060] Step 1: Mix 5 g of steareth-2 phosphate with 35 g of deionized water, and then stir at 60° C. to dissolve evenly, then add 0.8375 g of flaky potassium hydroxide with a mass concentration greater than 85%, and stir to react for 10 minutes.

[0061] Step 2: Dissolve 5 g of potassium stearate and 30 g of deionized water above 80° C., cool to room temperature, and then add 16 g of triethanolamine and stir evenly.

[0062] Step three, mix the solutions of step one and step two, then add 0.5g of fungicide, add deionized water to make the release agent sample 100g, stir evenly to prepare the release agent.

[0063] The performance of the release agent prepared in Example 4 was tested according to the following stability test method and demoulding performance test method. The results are shown in Tables 1 and 2.

[0064] Example 5

[0065] Step 1: Mix 5 g of steareth-2 phosphate with 35 g of deionized water, and then stir at 60° C. to dissolve evenly, then add 0.8375 g of flaky potassium hydroxide with a mass concentration greater than 85%, and stir to react for 10 minutes.

[0066] Step 2: Dissolve 10 g of potassium stearate and 30 g of deionized water above 80° C., cool to room temperature, and then add 20 g of triethanolamine and stir evenly.

[0067] Step three, mix the solutions of step one and step two, then add 0.5g of fungicide, add deionized water to make the release agent sample 100g, stir evenly to prepare the release agent.

[0068] The performance of the release agent prepared in Example 5 was tested according to the following stability test method and demoulding performance test method. The results are shown in Tables 1 and 2.

[0069] Comparative Example 1

[0070] Step 1: Mix 2 g of steareth-2 phosphate with 50 g of deionized water, and then stir at 60° C. to dissolve evenly, then add 0.335 g of flaky potassium hydroxide with a mass concentration greater than 85%, and stir to react for 10 minutes.

[0071] Step 2: Mix and dissolve 2 g of potassium stearate and 40 g of deionized water at a temperature above 80° C., and cool to room temperature.

[0072] Step three, mix the solutions of step one and step two, then add 0.5g of fungicide, add deionized water to make the release agent sample 100g, stir evenly to prepare the release agent.

[0073] According to the following stability test method and demoulding performance test method, the performance of the demoulding agent prepared in Comparative Example 1 was tested. The results are shown in Tables 1 and 2.

[0074] Comparative Example 2

[0075] Step 1: Mix 2 g of steareth-2 phosphate with 90 g of deionized water, and then stir at 60° C. to dissolve evenly, then add 0.335 g of flaky potassium hydroxide with a mass concentration greater than 85%, and stir to react for 10 minutes.

[0076] Step 2: Add 20 g of triethanolamine to the solution obtained in step 1 and stir evenly.

[0077] Step three, add 0.5g of fungicide to the solution of step two, add deionized water to make the release agent sample 100g, stir evenly to prepare the release agent.

[0078] According to the following stability test method and demoulding performance test method, the performance of the demoulding agent prepared in Comparative Example 2 was tested. The results are shown in Tables 1 and 2.

[0079] Comparative Example 3

[0080] Step 1: Dissolve 2 g of potassium stearate and 40 g of deionized water above 80° C., cool to room temperature, and then add 8 g of triethanolamine and stir evenly.

[0081] Step 2: Add 0.5 g of fungicide to the solution of step 1, add deionized water to make the release agent sample 100 g, and stir evenly to prepare the release agent.

[0082] According to the following stability test method and demoulding performance test method, the performance of the demoulding agent prepared in Comparative Example 2 was tested. The results are shown in Tables 1 and 2.

[0083] (II) Performance test

[0084] The above release agent stability test method and release performance test method are specifically as follows:

[0085] 1. Stability test method:

[0086] The release agents prepared in different embodiments were mixed with tap water in a mixing ratio of 1:9 to prepare a dilution solution, which was then sealed and left to stand for 5 days. After the test, the dilution stability of the prepared release agent was investigated by observing the appearance and state of the dilution solution.

[0087] The specific test results are shown in Table 1, which shows the dilution stability of the prepared release agent.

[0088] Table 1 Dilution stability of release agent

[0089] Dilution stability Comparative Example 1 Potassium stearate precipitation Comparative Example 2 Stable, no precipitation Comparative Example 3 Stable, no precipitation Example 1 Stable, no precipitation Example 2 Stable, no precipitation Example 3 Stable, no precipitation Example 4 Stable, no precipitation Example 5 Stable, no precipitation

[0090] The dilution stability test results show that comparative example 1 has precipitation due to the absence of co-solvent triethanolamine, while comparative example 2 and examples 1 to 5 all have co-solvent triethanolamine added, and no precipitation occurs. This indicates that the addition of triethanolamine is beneficial to improving the dilution stability of the release agent prepared by the present invention.

[0091] 2. Demolding performance test method:

[0092] The equipment used in the production of artificial boards is a continuous hot press, and the hot pressing temperature is generally around 200°C. In order to effectively evaluate the use effect of release agent products under laboratory conditions, a demoulding scheme simulating urea-formaldehyde adhesive bonded artificial boards was established. The demoulding simulation scheme consists of the following equipment and materials: (1) wood fiber powder, (2) urea-formaldehyde resin adhesive, (3) demoulding agent, (4) hot press, (5) processed mold.

[0093] According to the on-site production process, the above equipment and materials are operated according to the following steps: the first step is to mix the glue, mix the wood fiber powder and urea-formaldehyde resin adhesive evenly, the second step is to spray the release agent, spray a certain mass of the release agent on the surface of the circular steel plate, and then dehydrate it under high temperature environment, the third step is to spread, spread the above loose material evenly between two circular metal steel plates, the fourth step is hot pressing, place the assembled mold on the hot press, set 200℃ for testing, set the pressing time to 20min, and the fifth step is demolding, dismantling the mold to examine the demolding effect.

[0094] The demoulding effect evaluation method of the demoulding simulation evaluation scheme is:

[0095] Level 0: The molded product can be removed with almost no effort, the steel plate surface is smooth and clean without any residue, and the product is intact;

[0096] Level 1: The molded product can be removed with almost no effort, the surface of the steel plate is smooth, there is a very small amount of residue which can be removed effortlessly, and the product is intact;

[0097] Level 2: The molded product can be removed with slight effort. The surface of the steel plate is rough. There is a very small amount of residue that needs to be removed with effort. The product is intact.

[0098] Level 3: The molded product is removed with great difficulty, the steel plate surface is rough, there are a lot of residues that need to be removed with great effort, and the product is incomplete and severely damaged.

[0099] The specific test results are shown in Table 2, which shows the demoulding performance of the prepared release agent.

[0100] Table 2 Release performance of release agent

[0101] Mold release, mold release grade Comparative Example 1 1 Comparative Example 2 2 Comparative Example 3 2 Example 1 1 Example 2 0 Example 3 1 Example 4 1 Example 5 1

[0102] Through the test of demoulding simulation evaluation scheme, the test results show that: the demoulding evaluation grade of the demoulding agent of the present invention is 0 or 1, and the molded product can be removed with almost no effort, the surface of the steel plate is neat, and the product is complete; as a comparative example, the demoulding evaluation grade of comparative example 3 using only potassium stearate and triethanolamine and comparative example 2 using only stearyl alcohol polyether-2 phosphate and triethanolamine are both 2, and it takes slight or moderate effort to remove the molded product, the surface of the steel plate is rough, and there is a very small amount of residue and it needs to be removed with effort. This shows that the use of potassium stearate alone or stearyl alcohol polyether-2 phosphate alone as the active ingredient of the demoulding agent cannot achieve an excellent demoulding effect even in combination with triethanolamine, and potassium stearate, stearyl alcohol polyether-2 phosphate potassium and triethanolamine are needed to work together to successfully demould. This shows that the demoulding agent of the present invention can effectively achieve efficient demoulding of urea-formaldehyde resin bonded artificial boards.

[0103] 3. High temperature resistance test method:

[0104] Equal masses of potassium steareth-2 phosphate (prepared in Example 1) and potassium stearate and a mixture of potassium steareth-2 phosphate and potassium stearate in a mass ratio of 1:1 were placed in a stainless steel disc and tested at a high temperature of 200°C for 1 hour to observe the appearance and color changes of the test samples. The specific test results are shown in FIG. Figure 1 , Figure 2 , Figure 3 shown.

[0105] observe Figure 1 , Figure 2 , Figure 3 It can be seen that after being baked at 200℃ for 1h, potassium steareth-2 phosphate turns yellow (such as Figure 1 As shown), potassium stearate remains white (as Figure 2 As shown in Figure 2), the mixture of potassium steareth-2 phosphate and potassium stearate (1:1) showed a slight discoloration, but the overall color remained whitish (as shown in Figure 2). Figure 3 This shows that adding potassium stearate to the release agent can effectively improve the high temperature resistance of the effective components of the release agent, and even if the release agent remains on the surface of the steel strip, it will not affect the color change of the steel strip surface.

[0106] In summary, the release agent of the present invention has excellent dilution stability, demoulding performance and good high temperature resistance.

[0107] The above embodiments are only used to help understand the method and core idea of ​​the present invention. It should be noted that, for those skilled in the art, several improvements and modifications can be made to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A silicon-free artificial board release agent, characterized in that: Calculated by mass percentage, it includes the following components: Potassium Steareth-2 Phosphate: 1%-10%; Potassium stearate: 1%-10%; Triethanolamine: 2%-20%; Fungicide: 0.5%-2%; Deionized water: 58% - 95.5%.

2. The silicon-free artificial board release agent according to claim 1, characterized in that: The silicon-free artificial board release agent comprises the following components by mass percentage: Potassium Steareth-2 Phosphate: 2%-6%; Potassium stearate: 2%-10%; Triethanolamine: 8%-20%; Fungicide: 0.5%-1%; Deionized water: 73%-90%.

3. The silicon-free artificial board release agent according to claim 1 or 2, characterized in that: The bactericide is selected from s-triazine preservatives and bactericides.

4. The silicon-free artificial board release agent according to claim 1 or 2, characterized in that: The conductivity of the deionized water is less than 0.50 mS / m.

5. The method for preparing the silicon-free artificial board release agent according to any one of claims 1 to 4, characterized in that: The following steps are involved: (1) mixing steareth-2 phosphate and deionized water uniformly, adding potassium hydroxide to react to obtain a mixed system S1, mixing potassium stearate and deionized water above 80° C. uniformly, cooling to room temperature, adding triethanolamine and mixing uniformly to obtain a mixed system S2; (2) Mix the mixed system S1, the mixed system S2 and the fungicide, add deionized water to make the system 100 g, and mix them evenly to prepare a silicon-free artificial board release agent.

6. The preparation method according to claim 5, characterized in that: The molar ratio of stearyl alcohol polyether-2 phosphate to potassium hydroxide in the step (1) is 1:

1.

7. A silicon-free artificial board, characterized in that: A silicon-free artificial board release agent comprising any one of claims 1 to 4 or a silicon-free artificial board release agent prepared by the preparation method according to claim 5 or 6.

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