A release agent for isocyanate-bonded wood-based panels, and a method for preparing and using the same

Abstract

The present application belongs to the technical field of release agent, and particularly relates to a release agent for isocyanate-bonded wood-based panel and a preparation method and application thereof. The release agent for isocyanate-bonded wood-based panel provided by the present application comprises the following components in percentage by mass: 1-10% of fatty alcohol polyoxyethylene ether phosphate, 1-10% of fatty alcohol phosphate, 0.1-2% of fatty alcohol polyoxyethylene ether, 3-15% of silicone oil, 0.01-0.05% of defoaming agent, and 63-94.5% of deionized water. The release agent has excellent release performance, and is particularly suitable for the release of isocyanate-bonded wood-based panel. The fatty alcohol polyoxyethylene ether phosphate, the fatty alcohol phosphate and the fatty alcohol polyoxyethylene ether can reduce the wettability of isocyanate, and the natural isolation effect of the silicon-oxygen bond in the silicone oil can further achieve effective release and ensure the cleanliness of the surface of the steel belt. The release agent not only has the effect of efficient release, but also has the effect of lubrication and protection.

Description

Technical Field

[0001] The invention belongs to the technical field of release agents, and particularly relates to a release agent for isocyanate-bonded artificial boards, a preparation method thereof, and an application thereof. Background Art

[0002] The adhesives required for wood-based panel production include melamine formaldehyde (MF), urea-formaldehyde (UF), biomass adhesives, and isocyanate adhesives (MDI). With stricter regulations and requirements for formaldehyde emissions, the use of isocyanate adhesives has become increasingly popular.

[0003] Isocyanate MDI eco-adhesives are one of the downstream products of MDI and are used to manufacture various artificial boards. Isocyanate adhesives contain unsaturated -N=C=O groups and are highly reactive. Isocyanate (-NCO) reacts chemically with active hydrogen in raw materials such as wood fiber and straw fiber, pressing the wood raw materials into artificial boards under hot pressing conditions. The oxygen atom in the isocyanate group -N=C=O has the highest electron cloud density and the strongest electronegativity, making it highly susceptible to chemical reactions with active hydrogen to form hydroxyl groups, which then rearrange to form carbamates. The general chemical reaction formula is as follows:

[0004] R-NCO+R'-OH→RNHCOOR'.

[0005] During the high-temperature hot-pressing process of artificial boards, a small amount of unreacted isocyanate groups inevitably remain on the board surface. These unreacted isocyanate groups come into direct contact with the metal strip, where they chemically react with the active groups on the strip's surface, forming a bond that damages the artificial board and disrupts the normal production process. Compared to formaldehyde adhesives, isocyanate adhesives have a stronger bond with the metal strip, making it more difficult to release the artificial board from the strip. Summary of the Invention

[0006] In view of this, the object of the present invention is to provide a release agent for isocyanate bonded artificial boards, and a preparation method and application thereof. The release agent provided by the present invention not only has an efficient demoulding effect, but also can provide a lubricating and protective effect.

[0007] In order to achieve the above object, the present invention provides the following technical solutions:

[0008] The present invention provides a release agent for isocyanate-bonded artificial boards, which comprises the following components in percentage by mass:

[0009]

[0010]

[0011] Preferably, the fatty alcohol polyoxyethylene ether phosphate includes one or more of MOA-3P, MOA-4P, MOA-5P, MOA-6P, MOA-7P, MOA-8P, MOA-9P, MOA-10P, 1303P, 1304P, 1305P, 1306P, 1307P, 1308P, 1309P and 1310P.

[0012] Preferably, the fatty alcohol polyoxyethylene ether includes one or more of AEO-3, AEO-4, AEO-5, AEO-6, AEO-7, AEO-8, AEO-9, AEO-10, AEO-11, AEO-12 and AEO-13.

[0013] Preferably, the silicone oil includes one or more of methyl silicone oil, dimethyl silicone oil and modified alkyl silicone oil.

[0014] Preferably, the defoaming agent is a silicone oil defoaming agent.

[0015] Preferably, the hardness of the deionized water is less than 0.03 mmol / L.

[0016] The present invention also provides a method for preparing the release agent described in the above technical solution, comprising the following steps:

[0017] Firstly mixing fatty alcohol polyoxyethylene ether phosphate, fatty alcohol phosphate, fatty alcohol polyoxyethylene ether and silicone oil to obtain a first mixed solution;

[0018] mixing the first mixed solution and the first portion of deionized water for a second time to obtain a second mixed solution;

[0019] mixing the second mixed solution with a second portion of deionized water to obtain a third mixed solution;

[0020] mixing the third mixed solution and the defoaming agent for the fourth time to obtain a fourth mixed solution;

[0021] The fourth mixed liquid and the remaining deionized water are mixed for the fifth time to obtain a release agent.

[0022] Preferably, the mass of the first portion of deionized water is 2-6% of the total mass of the deionized water; the mass of the second portion of deionized water is 5-12% of the total mass of the deionized water.

[0023] Preferably, the second mixing is performed under stirring conditions; the stirring rate is 800 to 1500 rpm; the stirring time is 0.5 to 3 hours; and the stirring temperature is room temperature.

[0024] The present invention also provides the use of the release agent described in the above technical solution or the release agent prepared by the preparation method described in the above technical solution in the demoulding of isocyanate bonded artificial boards.

[0025] The invention provides a release agent for isocyanate-bonded artificial boards. The release agent comprises the following components, calculated by weight percentage: 1-10% of fatty alcohol polyoxyethylene ether phosphate, 1-10% of fatty alcohol phosphate, 0.1-2% of fatty alcohol polyoxyethylene ether, 3-15% of silicone oil, 0.01-0.05% of defoaming agent, and 63-94.5% of deionized water.

[0026] The release agent provided by the present invention comprises silicone oil as an active ingredient, fatty alcohol polyoxyethylene ether phosphate and fatty alcohol phosphate as emulsifiers, and fatty alcohol polyoxyethylene ether as a co-emulsifier. The release agent is an emulsion-type release agent formed by utilizing phosphate ester and silicone oil through the concept of emulsifying the silicone oil with phosphate ester. The phosphate ester is a fatty alcohol polyoxyethylene ether phosphate or a monoester or diester of fatty alcohol phosphate, and the fatty alcohol polyoxyethylene ether can be used to reduce the wettability of isocyanate, thereby reducing its adhesion. The silicone oil relies on the isolation effect of the silicon-oxygen bond itself, and the compound phosphate ester can effectively achieve the demoulding of isocyanate-bonded artificial boards, ensuring the cleanliness of the steel strip surface. At the same time, the phosphonate, as a phosphorus-based anti-wear additive, can provide lubrication and protection for the metal steel strip, further protecting the metal steel strip.

[0027] The release agent provided by the present invention has excellent high-temperature resistance, fully meeting the requirements of high-temperature pressing of artificial board materials. It not only effectively isolates the artificial board materials from the metal steel strip, ensuring the cleanliness of the metal steel strip surface and reducing the need for cleaning the steel strip surface, but also provides lubrication and protection for the metal steel strip, reducing friction and wear of the metal steel strip and extending its service life. Furthermore, the release agent provided by the present invention is a water-based emulsion, making it safe and environmentally friendly for use in high-temperature environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 Figure 2 is a diagram of a mold processed for testing the release performance of the release agent of the present invention. DETAILED DESCRIPTION

[0029] The present invention provides a release agent for isocyanate-bonded artificial boards, which comprises the following components in percentage by mass:

[0030]

[0031] Unless otherwise specified, the present invention has no special requirements on the sources of the raw materials used, and commercially available products known to those skilled in the art can be used.

[0032] The release agent for isocyanate-bonded artificial boards provided by the present invention comprises 1-10% by mass of fatty alcohol polyoxyethylene ether phosphate, preferably 2-5% by mass. In the present invention, the fatty alcohol polyoxyethylene ether phosphate preferably includes one or more of MOA-3P, MOA-4P, MOA-5P, MOA-6P, MOA-7P, MOA-8P, MOA-9P, MOA-10P, 1303P, 1304P, 1305P, 1306P, 1307P, 1308P, 1309P and 1310P, more preferably one or more of MOA-3P, MOA-4P, MOA-7P, MOA-9P, 1303P, 1304P, 1307P, 1308P and 1309P, most preferably 1303P and 1309P, or 1304P and 1307P, or 1303P and 1308P, or MOA-4P and MOA-7P, or MOA-3P and MOA-9P. When the fatty alcohol polyoxyethylene ether phosphates are of the above types, the present invention has no special limitation on the ratio of different types of fatty alcohol polyoxyethylene ether phosphates, and any ratio may be used.

[0033] In the present invention, fatty alcohol polyoxyethylene ether phosphate is a commercially available product, which is a condensation product of fatty alcohol and ethylene oxide. It acts as an emulsifier and can reduce the adhesion of isocyanate.

[0034] The release agent for isocyanate-bonded artificial panels provided by the present invention comprises 1 to 10% by weight of a fatty alcohol phosphate, preferably 2 to 5%. In the present invention, the fatty alcohol phosphate is a commercially available product, a reaction product of a linear or branched fatty alcohol and phosphorus pentoxide, and a mixture of monoesters and diesters of phosphoric acid. The fatty alcohol phosphate acts as an emulsifier to reduce isocyanate adhesion.

[0035] The release agent for isocyanate-bonded artificial panels provided by the present invention comprises 0.1 to 2% by weight of a fatty alcohol polyoxyethylene ether, preferably 0.3 to 1%. In the present invention, the fatty alcohol polyoxyethylene ether preferably comprises one or more of AEO-3, AEO-4, AEO-5, AEO-6, AEO-7, AEO-8, AEO-9, AEO-10, AEO-11, AEO-12, and AEO-13, more preferably AEO-4, AEO-6, AEO-7, AEO-4, AEO-8, AEO-10, or AEO-12. When the fatty alcohol polyoxyethylene ether is selected from the above, the present invention does not specifically limit the ratio of different types of fatty alcohol polyoxyethylene ethers, and any ratio may be used.

[0036] In the present invention, the fatty alcohol polyoxyethylene ether is an auxiliary emulsifier, which can reduce the adhesion of isocyanate.

[0037] The release agent for isocyanate bonded artificial boards provided by the present invention comprises 3-15% by weight of silicone oil, preferably 5-9%. In the present invention, the silicone oil preferably comprises one or more of methyl silicone oil, dimethyl silicone oil and modified alkyl silicone oil; the organic group of the modified silicone oil preferably comprises methylphenyl or C5-C 12 The silicone oil is preferably methylphenyl silicone oil, dimethyl silicone oil, dodecyl silicone oil or methyl silicone oil. When the silicone oil is any of the above, the present invention has no particular limitation on the ratio of different types of silicone oils, and any ratio can be used.

[0038] In the present invention, silicone oil is the active ingredient of the release agent, fatty alcohol polyoxyethylene ether phosphate and fatty alcohol phosphate are used as emulsifiers, and fatty alcohol polyoxyethylene ether is used as a co-emulsifier. The silicone oil emulsion is prepared by adjusting the HLB value (hydrophilic-hydrophobic balance) using a phase inversion emulsification method. The phosphate ester is a monoester or diester of fatty alcohol polyoxyethylene ether phosphate and fatty alcohol phosphate, and the fatty alcohol polyoxyethylene ether can be used to reduce isocyanate adhesion and can withstand short-term high temperature and high pressure. At the same time, as a phosphorus anti-wear additive, it can provide lubrication and protection for metal steel strips. The silicone oil relies on the isolation effect of the silicon-oxygen bond itself. The compound phosphate ester can effectively achieve the demolding of isocyanate-bonded artificial boards.

[0039] The release agent for isocyanate-bonded artificial boards provided by the present invention comprises a defoamer in an amount of 0.01 to 0.05% by mass, preferably 0.02 to 0.04% by mass. In the present invention, the defoamer is preferably a silicone oil defoamer.

[0040] The release agent for isocyanate bonded artificial boards provided by the present invention comprises 63-94.5% by mass of deionized water, preferably 75-90%. In the present invention, the hardness of the deionized water is preferably less than 0.03 mmol / L, more preferably 0.01-0.02 mmol / L.

[0041] The present invention also provides a method for preparing the release agent described in the above technical solution, comprising the following steps:

[0042] Firstly mixing fatty alcohol polyoxyethylene ether phosphate, fatty alcohol phosphate, fatty alcohol polyoxyethylene ether and silicone oil to obtain a first mixed solution;

[0043] mixing the first mixed solution and the first portion of deionized water for a second time to obtain a second mixed solution;

[0044] mixing the second mixed solution with a second portion of deionized water to obtain a third mixed solution;

[0045] mixing the third mixed solution and the defoaming agent for the fourth time to obtain a fourth mixed solution;

[0046] The fourth mixed liquid and the remaining deionized water are mixed for the fifth time to obtain a release agent.

[0047] The present invention first mixes fatty alcohol polyoxyethylene ether phosphate, fatty alcohol phosphate, fatty alcohol polyoxyethylene ether and silicone oil to obtain a first mixed liquid.

[0048] In the present invention, the first mixing is preferably carried out under stirring conditions; the stirring rate is preferably 300-500 rpm, more preferably 300-400 rpm; the stirring time is preferably 10-30 min, more preferably 15-25 min; the stirring temperature is preferably 25-40°C, more preferably 25-30°C.

[0049] The first mixed solution is obtained, and the present invention performs a second mixing of the first mixed solution and a first portion of deionized water to obtain a second mixed solution.

[0050] In the present invention, the mass of the first part of deionized water is preferably 2-6% of the total mass of deionized water, more preferably 2.5-5%; the second mixing is preferably carried out under stirring conditions; the stirring rate is preferably 800-1500 rpm, more preferably 900-1100 rpm; the stirring time is preferably 1 hour; and the stirring temperature is preferably room temperature.

[0051] After obtaining the second mixed liquid, the present invention performs a third mixing of the second mixed liquid and a second portion of deionized water to obtain a third mixed liquid.

[0052] In the present invention, the mass of the second part of deionized water is preferably 5-12% of the total mass of the deionized water, more preferably 5.5-10%; the third mixing is preferably carried out under stirring conditions; the stirring rate is preferably 800-1500 rpm, more preferably 900-1100 rpm; the stirring time is preferably 0.5-3 h, more preferably 1 h; the stirring temperature is preferably room temperature; the third mixing is preferably adding the second part of deionized water to the second mixed liquid; the time for adding the second part of deionized water is preferably 10-30 min, more preferably 20-30 min.

[0053] After obtaining the third mixed liquid, the present invention further mixes the third mixed liquid with a defoaming agent to obtain a fourth mixed liquid.

[0054] In the present invention, the fourth mixing is preferably carried out under stirring conditions; the stirring rate is preferably 500-800 rpm, more preferably 600-700 rpm; the stirring time is preferably 0.2-1 h, more preferably 0.5 h; and the stirring temperature is preferably room temperature.

[0055] After obtaining the fourth mixed liquid, the present invention further mixes the fourth mixed liquid and the remaining deionized water to obtain a release agent.

[0056] In the present invention, the fifth mixing is preferably carried out under stirring conditions; the stirring rate is preferably 500-800 rpm, more preferably 600-700 rpm; the stirring time is preferably 0.2-1 h, more preferably 0.5 h; and the stirring temperature is preferably room temperature.

[0057] The invention uses silicone oil as an effective component, fatty alcohol polyoxyethylene ether phosphate and fatty alcohol phosphate as emulsifiers, and fatty alcohol polyoxyethylene ether as an auxiliary emulsifier to prepare a release agent through a phase inversion emulsification method.

[0058] The present invention also provides the use of the release agent described in the above technical solution or the release agent prepared by the preparation method described in the above technical solution in the demoulding of isocyanate bonded artificial boards.

[0059] The present invention has no special limitation on the application of the release agent in the demoulding of isocyanate bonded artificial boards, and any application method known in the art can be used. In the present invention, the amount of the release agent is preferably 15 to 40 g / m 2 , more preferably 30g / m 2 .

[0060] The technical solutions of the present invention will be described clearly and completely below in conjunction with the embodiments of the present invention, but they should not be understood as limiting the scope of protection of the present invention.

[0061] Example 1

[0062] To a stainless steel reactor, 100 g of dimethyl silicone oil, 20 g of MOA-4P, 5 g of MOA-7P, 10 g of fatty alcohol phosphate, and 3 g of AEO-7 were added in sequence, and the mixture was stirred and dispersed at 300 rpm at 25 ° C for 0.5 h. The stirring speed was increased to 1000 rpm, and then 30 g of deionized water (hardness of 0.02 mmol / L) was added, and stirred at room temperature for 1 h; then 60 g of deionized water was uniformly added within 20 min, and stirring was continued for 1 h; the stirring speed was reduced to 500 rpm, and then 0.1 g of silicone oil defoamer was added, stirred for 0.5 h, and then 769 g of deionized water was added and stirred for 0.5 h to obtain a release agent.

[0063] Example 2

[0064] To a stainless steel reactor, 120 g of methylphenyl silicone oil, 20 g of MOA-3P, 13 g of MOA-9P, 10 g of fatty alcohol phosphate, and 5 g of AEO-4 were added in sequence, and the mixture was stirred and dispersed at 400 rpm at 25 ° C for 0.5 h. The stirring speed was increased to 1100 rpm, and then 30 g of deionized water (hardness of 0.02 mmol / L) was added, and stirred at room temperature for 1 h; then 80 g of deionized water was added at a uniform speed within 20 min, and stirring was continued for 1 h; the stirring speed was reduced to 700 rpm, and then 0.1 g of silicone oil defoamer was added, stirred for 0.5 h, and then 708 g of deionized water was added and stirred for 0.5 h to obtain a release agent.

[0065] Example 3

[0066] To a stainless steel reactor, 50 g of dimethyl silicone oil and 60 g of methylphenyl silicone oil, 40 g of 1303P, 25 g of 1309P, 15 g of fatty alcohol phosphate, and 13 g of AEO-10 ​​were added in sequence, and the mixture was stirred and dispersed at 500 rpm at 30°C for 0.5 h. The stirring speed was increased to 1200 rpm, and then 40 g of deionized water (hardness of 0.02 mmol / L) was added, and stirred at room temperature for 1 h; then 70 g of deionized water was added at a uniform speed within 30 min, and stirring was continued for 1 h; the stirring speed was reduced to 600 rpm, and then 0.2 g of a silicone oil defoamer was added, and the mixture was stirred for 0.5 h. Then, 687 g of deionized water was added and stirred for 0.5 h to obtain a release agent.

[0067] Example 4

[0068] To a stainless steel reactor, 100 g of dimethyl silicone oil, 20 g of 1304P, 5 g of 1307P, 10 g of fatty alcohol phosphate, and 8 g of AEO-6 were added in sequence, and the mixture was stirred and dispersed at 300 rpm at 30°C for 0.5 h. The stirring speed was increased to 950 rpm, and then 45 g of deionized water (hardness of 0.02 mmol / L) was added, and stirred at room temperature for 1 h; then 65 g of deionized water was added at a uniform speed within 25 min, and stirring was continued for 1 h; the stirring speed was reduced to 600 rpm, and then 0.15 g of a silicone oil defoamer was added, and the mixture was stirred for 0.5 h. Then, 747 g of deionized water was added and stirred for 0.5 h to obtain a release agent.

[0069] Example 5

[0070] To a stainless steel reactor, 120 g of methylphenyl silicone oil, 20 g of 1303P, 15 g of 1308P, 12 g of fatty alcohol phosphate, and 3 g of AEO-8 were added in sequence, and the mixture was stirred and dispersed at 450 rpm at 25°C for 0.5 h. The stirring speed was increased to 1050 rpm, and then 30 g of deionized water (hardness of 0.02 mmol / L) was added, and stirred at room temperature for 1 h; then 70 g of deionized water was added at a uniform speed within 25 min, and stirring was continued for 1 h; the stirring speed was reduced to 600 rpm, and then 0.1 g of a silicone oil defoamer was added, and the mixture was stirred for 0.5 h. Then, 730 g of deionized water was added, and the mixture was stirred for 0.5 h to obtain a release agent.

[0071] Example 6

[0072] To a stainless steel reactor, 80 g of dimethyl silicone oil, 50 g of 1303P, 35 g of 1308P, 20 g of fatty alcohol phosphate, and 6 g of AEO-12 were added in sequence, and the mixture was stirred and dispersed at 450 rpm at 25°C for 0.5 h. The stirring speed was increased to 1100 rpm, and then 30 g of deionized water (hardness of 0.02 mmol / L) was added, and stirred at room temperature for 1 h; then 70 g of deionized water was added at a uniform speed within 25 min, and stirring was continued for 1 h; the stirring speed was reduced to 650 rpm, and then 0.1 g of a silicone oil defoamer was added, and stirring was carried out for 0.5 h. Then, 715 g of deionized water was added and stirred for 0.5 h to obtain a release agent.

[0073] Example 7

[0074] To a stainless steel reactor, 90 g of dodecyl silicone oil, 20 g of MOA-4P, 5 g of MOA-7P, 10 g of fatty alcohol phosphate, and 3 g of AEO-7 were added in sequence, and the mixture was stirred and dispersed at 400 rpm at 35 ° C for 0.5 h. The stirring speed was increased to 1000 rpm, and then 30 g of deionized water (hardness of 0.02 mmol / L) was added, and stirred at room temperature for 1 h; then 60 g of deionized water was added at a uniform speed within 20 min, and stirring was continued for 1 h; the stirring speed was reduced to 500 rpm, and then 0.1 g of silicone oil defoamer was added, stirred for 0.5 h, and then 779 g of deionized water was added and stirred for 0.5 h to obtain a release agent.

[0075] Example 8

[0076] To a stainless steel reactor, 30 g of methyl silicone oil, 30 g of methylphenyl silicone oil, 40 g of dodecyl silicone oil, 20 g of MOA-3P, 13 g of MOA-9P, 10 g of fatty alcohol phosphate, and 5 g of AEO-4 were added in sequence, and the mixture was stirred and dispersed at 500 rpm at 25 ° C for 0.5 h. The stirring speed was increased to 1200 rpm, and then 30 g of deionized water (hardness of 0.02 mmol / L) was added, and stirred at room temperature for 1 h; then 80 g of deionized water was added at a uniform speed within 20 min, and stirring was continued for 1 h; the stirring speed was reduced to 550 rpm, and then 0.1 g of silicone oil defoamer was added, stirred for 0.5 h, and then 775 g of deionized water was added and stirred for 0.5 h to obtain a release agent.

[0077] Comparative Example 1

[0078] To a stainless steel reactor, 100 g of dimethyl silicone oil, 20 g of fatty alcohol polyoxyethylene ether MOA-4, 15 g of fatty alcohol polyoxyethylene ether MOA-7, and 10 g of fatty alcohol phosphate were added in sequence, and the mixture was stirred and dispersed at 450 rpm at 30 ° C for 0.5 h. The stirring speed was increased to 1000 rpm, and then 30 g of deionized water (hardness of 0.02 mmol / L) was added, and stirred at room temperature for 1 h; then 60 g of deionized water was added at a uniform speed within 25 min, and stirring was continued for 1 h; the stirring speed was reduced to 600 rpm, and then 0.1 g of silicone oil defoamer was added, and stirred for 0.5 h. Then, 769 g of deionized water was added and stirred for 0.5 h to obtain a release agent.

[0079] Comparative Example 2

[0080] To a stainless steel reactor, 20 g of MOA-4P, 15 g of MOA-7P, 5 g of fatty alcohol phosphate, and 3 g of AEO-7 were added in sequence, followed by 957 g of deionized water (hardness of 0.02 mmol / L). The mixture was stirred at 400 rpm for 0.5 h at 25 °C, and then 0.1 g of defoaming agent was added. The stirring speed was set to 900 rpm and stirred for 0.5 h to obtain a release agent.

[0081] Performance Testing

[0082] (1) The centrifugal stability of the release agents of Examples 1 to 8 and Comparative Examples 1 to 2 and the stability of the dilutions after mixing with water were tested. The specific test methods are as follows:

[0083] A Xiangyi centrifuge TG16-WS was used with a speed of 3000 rpm and a centrifugal time of 30 min. The centrifugal stability of the release agents of different embodiments and comparative examples was investigated by observing the appearance and state of the emulsion after centrifugation.

[0084] The release agents of different embodiments and comparative examples were mixed with tap water to prepare dilutions in a mixing ratio of 1:9 by mass. The mixture was then sealed and allowed to stand for 5 days. After the test, the dilution stability of the prepared emulsions was investigated by observing the appearance and state of the dilutions.

[0085] Table 1 Centrifugal stability and dilution stability of release agents

[0086]

[0087]

[0088] As shown in Table 1, the centrifugal stability test at 3000 rpm for 30 minutes and the dilution stability test at a mass ratio of 1:9 show that the release agents prepared by the present invention have excellent centrifugal stability and dilution stability, indicating that the release agents can maintain long-term storage stability in a normal state and will not easily demulsify and precipitate in a short time.

[0089] (2) The release properties of the release agents of Examples 1 to 8 and Comparative Examples 1 to 2 were tested. The specific test scheme is as follows:

[0090] The production of wood-based panels utilizes a continuous hot press, operating at temperatures of 180-240°C, with a hydraulic pressure of 150-300 bar and a maximum pressing time of 20 minutes. Based on these production process conditions, a release scheme for simulated isocyanate-bonded wood-based panels was developed using the hot press and a custom mold.

[0091] The demoulding simulation scheme consists of the following equipment and materials: (1) wood fiber powder, (2) isocyanate adhesive, (3) demoulding agent, (4) hot press, (5) processing mold. The processing mold consists of a pressing groove and two circular steel plates, shaped like Figure 1 shown.

[0092] The demoulding simulation evaluation program is as follows: (1) mixing wood fiber powder and isocyanate adhesive to form a loose material; (2) spraying a demoulding agent on the surface of a circular steel plate at a dosage of 30 g / m 2 , and then evaporate the water under high temperature environment, (3) place a circular steel plate in the pressing tank, and then evenly spread the above loose material on the surface of the circular metal steel plate, and cover the surface of the material with another circular steel plate, (4) place the assembled mold on the hot press, and set any temperature value from the temperature range of 180~240℃, and any pressure value from the pressure range of 150~300bar, and set the pressing time to 20min, (5) after the hot pressing is completed, disassemble the mold to examine the demoulding effect.

[0093] The demoulding effect evaluation method of this demoulding simulation evaluation scheme is:

[0094] 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.

[0095] 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 that can be removed effortlessly. The product is intact.

[0096] Level 2: 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 that needs to be removed with effort. The product is intact.

[0097] Level 3: The molded product is slightly difficult to remove, the steel plate surface is rough, there is a very small amount of residue that requires effort to remove, and the product is slightly damaged;

[0098] Level 4: It is moderately difficult to remove the molded product. The steel plate surface is rough, there is a lot of residue and it requires effort to remove it. The product is moderately damaged.

[0099] Level 5: It is very difficult to remove the molded product. The surface of the steel plate is rough. There are a lot of residues that need to be removed with great effort. The product is incomplete and severely damaged.

[0100] Table 2 Release performance of release agent

[0101] Serial number Mold release, mold release grade Comparative Example 1 4 Comparative Example 2 3 Example 1 2 Example 2 2 Example 3 1 Example 4 2 Example 5 2 Example 6 1 Example 7 2 Example 8 1

[0102] As shown in Table 2, the release simulation evaluation results show that the release agent of the present invention achieved a release rating of 1 or 2, allowing for almost effortless removal of the molded product, resulting in a smooth steel plate surface and intact product. In contrast, the release ratings of the phosphate ester and silicone oil emulsions used alone were 3 or 4, requiring slight or moderate effort to remove the molded product, resulting in a rough steel plate surface and slight damage to the product. Therefore, it can be concluded that the release agent of the present invention effectively achieves the release of isocyanate-bonded wood-based panels.

[0103] Although the above embodiment describes the present invention in detail, it is only a part of the embodiments of the present invention rather than all the embodiments. People can also obtain other embodiments based on this embodiment without creativity, and these embodiments all fall within the scope of protection of the present invention.

Claims

1. A release agent for isocyanate bonded artificial boards, characterized in that Calculated by mass percentage, it is composed of the following components: Fatty alcohol polyoxyethylene ether phosphate 1~10%, Fatty alcohol phosphate 1~10%, Fatty alcohol polyoxyethylene ether 0.1~2%, Silicone oil 3~15%, Defoaming agent 0.01~0.05%, Deionized water 63~94.5%.

2. The release agent according to claim 1, characterized in that The fatty alcohol polyoxyethylene ether phosphate includes one or more of MOA-3P, MOA-4P, MOA-5P, MOA-6P, MOA-7P, MOA-8P, MOA-9P, MOA-10P, 1303P, 1304P, 1305P, 1306P, 1307P, 1308P, 1309P and 1310P.

3. The release agent according to claim 1, characterized in that The fatty alcohol polyoxyethylene ether includes one or more of AEO-3, AEO-4, AEO-5, AEO-6, AEO-7, AEO-8, AEO-9, AEO-10, AEO-11, AEO-12 and AEO-13.

4. The release agent according to claim 1, characterized in that The silicone oil includes one or more of methyl silicone oil and modified alkyl silicone oil.

5. The release agent according to claim 1, characterized in that The defoaming agent is a silicone oil defoaming agent.

6. The release agent according to claim 1, characterized in that The hardness of the deionized water is less than 0.03 mmol / L.

7. The method for preparing the release agent according to any one of claims 1 to 6, characterized in that: The following steps are involved: Firstly mixing fatty alcohol polyoxyethylene ether phosphate, fatty alcohol phosphate, fatty alcohol polyoxyethylene ether and silicone oil to obtain a first mixed solution; mixing the first mixed solution and the first portion of deionized water for a second time to obtain a second mixed solution; mixing the second mixed solution with a second portion of deionized water to obtain a third mixed solution; mixing the third mixed solution and the defoaming agent for the fourth time to obtain a fourth mixed solution; The fourth mixed liquid and the remaining deionized water are mixed for the fifth time to obtain a release agent.

8. The preparation method according to claim 7, characterized in that The mass of the first portion of deionized water is 2-6% of the total mass of the deionized water; the mass of the second portion of deionized water is 5-12% of the total mass of the deionized water.

9. The preparation method according to claim 7, characterized in that The second mixing is carried out under stirring conditions; The stirring rate is 800-1500 rpm; the stirring time is 0.5-3 h; and the stirring temperature is room temperature.

10. Use of the release agent according to any one of claims 1 to 6 or the release agent prepared by the preparation method according to any one of claims 7 to 9 in demoulding isocyanate-bonded artificial boards.

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