CN111531658A - Impregnated bond paper facing formaldehyde-free artificial board and preparation method thereof - Google Patents
Impregnated bond paper facing formaldehyde-free artificial board and preparation method thereof Download PDFInfo
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- CN111531658A CN111531658A CN202010394894.2A CN202010394894A CN111531658A CN 111531658 A CN111531658 A CN 111531658A CN 202010394894 A CN202010394894 A CN 202010394894A CN 111531658 A CN111531658 A CN 111531658A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27D—WORKING VENEER OR PLYWOOD
- B27D1/00—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/04—Non-macromolecular additives inorganic
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/08—Macromolecular additives
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J175/00—Adhesives based on polyureas or polyurethanes; Adhesives based on derivatives of such polymers
- C09J175/04—Polyurethanes
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
- D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
- D21H23/22—Addition to the formed paper
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H25/00—After-treatment of paper not provided for in groups D21H17/00 - D21H23/00
- D21H25/04—Physical treatment, e.g. heating, irradiating
- D21H25/06—Physical treatment, e.g. heating, irradiating of impregnated or coated paper
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
Abstract
The invention claims to protect an impregnated bond paper facing formaldehyde-free artificial board and a preparation method thereof, wherein paper is completely impregnated in formaldehyde-free impregnated adhesive for 20-40s and then dried at 75-105 ℃, and no redundant glue solution is left on the paper; and after drying, completely soaking the paper in the adhesive for 10-30s, and completely drying at 85-105 ℃. Selecting an aldehyde-free artificial board, and hot-pressing the impregnated bond paper on the artificial board for 1-3min at the pressure of 4-6Mpa and the temperature of 150-. The formaldehyde-free impregnating adhesive comprises: 30-50 parts of waterborne polyurethane emulsion, 1-5 parts of nano-cellulose, 5-10 parts of filler and 300 parts of water 200-one. The artificial board prepared by the application has no free formaldehyde released, and really realizes no formaldehyde.
Description
Technical Field
The invention relates to an impregnated decorative paper veneer formaldehyde-free artificial board and a preparation method thereof, belonging to the technical field of artificial board processing.
Background
The application of the impregnated bond paper facing artificial board is more and more extensive due to the limitation of wood resource shortage and the rise of customized home. The decorative board uses artificial boards such as shaving boards, fiber boards and the like as base materials and impregnated paper as a facing material, has multiple product specifications, good processing performance and diversified surface decoration, and has excellent performances of wear resistance, heat resistance, water resistance, chemical pollution resistance, smooth, bright and clean surface and the like.
The artificial board with impregnated adhesive film paper as its facing layer is produced through soaking decorative paper with adhesive, drying and hot pressing to adhere the adhesive onto the surface of artificial board. With the increasing of indoor environment requirements and the coming of relevant national laws and regulations, the non-hydroformylation of the impregnated bond paper-faced wood-based panel is imminent. The key points are no hydroformylation of the adhesive used in the manufacture of artificial boards and no hydroformylation of the adhesive impregnated in decorative paper. Generally, the aldehyde-free adhesives mainly include natural adhesives (including mineral substances, animal glues, vegetable glues and the like), modified bio-based adhesives (soybean protein glue, vegetable oil, lignin and the like), aldehyde-free (modified) polymer resin adhesives (including acrylate, polyurethane, polyvinyl acetate) and the like.
Aiming at the non-hydroformylation of artificial boards such as fiber boards, particle boards and the like, the traditional melamine adhesive and urea-formaldehyde adhesive are mainly replaced by bio-based adhesives (soybean protein, modified vegetable glue and the like) and resin adhesives (mainly acrylic acid, polyurethane and the like). For example, soybean meal glue developed at the university of Guangxi was used in the manufacture of particle board (CN109880586A), and polyurethane glue was used in the production of particle board by Wanhua chemistry (CN 109081902A). Guangxi Jingxi chemical technology Co., Ltd (CN 109868100A) discloses a preparation method of a lignin-based biomass formaldehyde-free adhesive, and the lignin-based biomass formaldehyde-free adhesive is used as an artificial board adhesive, the bonding strength reaches more than 1.5MPa, and free formaldehyde is not detected. The non-hydroformylation of artificial boards has been realized industrially, and the development of non-formaldehyde adhesives for impregnated bond paper has become the key to solve the problem of non-hydroformylation of artificial board products decorated by the impregnated bond paper.
However, the raw materials of paper and artificial board are different from each other in terms of macroscopic size, fiber state and material interface characteristics, and the fact proves that the adhesive suitable for artificial board production is not suitable for impregnation and pasting of facing paper. At present, the bio-based adhesive is rarely applied to the impregnation of decorative paper due to the mildew resistance and poor weather resistance. Only a few reports on (modified) polymeric resin adhesives have been made, for example, the yoyuan impregnated paper industry ltd (CN 109776717 a) in linyi city has obtained an acrylate-based decorative paper impregnated adhesive, and the prepreg decorative paper and overlay paper produced therefrom are aldehyde-free, soft, rollable and cuttable. Polyurethane impregnating adhesives developed by Wanhua ecological technology Co., Ltd (CN 110450239A) can also realize no hydroformylation of decorative paper. However, the organic polymer resin adhesives have a high viscosity and a large particle size, and thus are difficult to penetrate into the interior of the decorative base paper, resulting in problems such as peeling between paper layers. Generally, polyurethane products are good adhesive products due to adjustable adhesive film performance, stronger liquid repellency and better physical strength. However, the viscosity is generally higher and the molecular weight is larger, and the above-mentioned problems as a paper impregnating adhesive are more serious. Therefore, improving the permeability of the polyurethane adhesive in paper is the key to fully utilize the performance advantages of the polyurethane adhesive film.
The preparation of the polyurethane adhesive for the impregnated bond paper has the advantages of good paper permeability, high adhesion, excellent physical strength of a bond film and high glue hanging amount. The adhesive meeting the requirements is adopted to impregnate the decorative paper, a proper paper impregnating, drying and hot pressing process is selected, and the impregnated bond paper is hot pressed on the surface of the aldehyde-free artificial board, so that the preparation of the aldehyde-free artificial board with the impregnated bond paper facing can be realized.
Disclosure of Invention
The invention aims to solve the technical problems in the prior art, provides an aldehyde-free adhesive for impregnated bond paper with physical strength meeting the national standard requirement and a preparation method thereof, and provides an impregnation and hot pressing process suitable for the adhesive to realize the preparation of the aldehyde-free artificial board for the impregnated bond paper facing.
The preparation method of the impregnated bond paper facing formaldehyde-free artificial board comprises the following steps: completely soaking paper in the formaldehyde-free soaking adhesive for 20-40s, and drying at 75-105 ℃ until no excessive glue solution exists on the paper surface; after drying, the paper is completely immersed in the adhesive for 10-30s and then completely dried at 85-105 ℃. Selecting an aldehyde-free artificial board, and hot-pressing the impregnated bond paper on the artificial board for 1-3min at the pressure of 4-6Mpa and the temperature of 150-.
Further, the formaldehyde-free impregnating adhesive comprises the following components in parts by mass:
aqueous polyurethane emulsion: 30-50 parts of
Nano-cellulose: 1-5 parts of
Filling: 5-10 parts of
Water: 200 portions and 300 portions.
Specifically, the nano-cellulose is dialdehyde modified nano-cellulose, the solid content is 0.5-3%, and the particle size is 20-50 nm. As a filler dispersant, the filler can be uniformly and stably present in the aqueous polyurethane emulsion. The structure of the dialdehyde modified nano-cellulose is as follows:
specifically, the filler is a titanium dioxide suspension with the particle size of 50-200nm, and the mass fraction is about 20%; silicon dioxide suspension with the particle size of 50-100nm, the mass fraction is about 10%; 50-100nm zinc dioxide suspension with the mass fraction of about 10%; alumina suspension with the grain diameter of 50-200nm, and the mass fraction of the alumina suspension is about 10 percent or the combination of a plurality of alumina suspensions. The function of the paper is to improve the hanging amount of the impregnated bond paper and the scratch resistance and wear resistance of the adhesive film.
Specifically, the formula of the aqueous polyurethane emulsion comprises the following components: the molar ratio of the dihydric alcohol to the diisocyanate is 0.8-2, the molar part of the dihydric alcohol is 20-40, the chain extender is 3-8, the hydrophilic agent is 5-10, the glacial acetic acid is 0.1-1 and the water is 50-80.
More specifically, the dihydric alcohol comprises one or more of polyester dihydric alcohol and polyether dihydric alcohol which do not contain aliphatic rings or aromatic rings. The diisocyanate comprises one or more of isophorone diisocyanate (IPDI), diphenylmethane diisocyanate (MDI), dicyclohexylmethane diisocyanate (HMDI), Hexamethylene Diisocyanate (HDI) and Lysine Diisocyanate (LDI). The chain extender is one of ethylene glycol, propylene glycol, 1, 4-butanediol, diethylene glycol and 1, 4-cyclohexanediol. The hydrophilic agent is N-Methyldiethanolamine (MDEA). The end-capping reagent is one of gamma-aminopropyl triethoxysilane (KH550) or hydroxyethyl acrylate.
The preparation method of the waterborne polyurethane emulsion comprises the following steps:
1) adding dihydric alcohol and diisocyanate into a reaction kettle with a stirring and refluxing device according to a certain proportion, and carrying out prepolymerization reaction under the protection of high-purity nitrogen at the reaction temperature of 40-60 ℃ for 0.5-1h to obtain the polyurethane prepolymer.
2) Heating the prepolymer to 65-80 ℃, dropwise adding a chain extender into the prepolymer for 10-20min, carrying out chain extension reaction for 0.5-1.5h, and stirring at a speed of 50-100 r/min. Then cooling to 40-60 ℃, adding the hydrophilic agent, and finishing the addition within 30min, wherein the reaction time is 0.5-1.5 h.
3) Cooling to room temperature, adding glacial acetic acid for neutralization, simultaneously using a proper amount of acetone for viscosity reduction, adding water after proper viscosity and shearing at high speed, wherein the shearing speed is 2000-; the solid content of the emulsion is about 20 percent, the particle diameter is 50-100nm, the viscosity is 50-100cp, and the molecular weight is 500-2000-.
According to the formula proportion, the nano-cellulose is put into water and the aqueous polyurethane emulsion at room temperature, and stirred for 5-10min at the speed of 500-; and then adjusting the stirring speed to 1000-3000r/min, simultaneously adding a filler into the mixture, continuously stirring for 10-20min, and standing to obtain the aldehyde-free adhesive for the impregnated adhesive film paper.
Carrying out impregnation and drying treatment on the base paper by adopting the aldehyde-free adhesive to obtain impregnated bond paper; and hot-pressing the impregnated decorative paper to the surface of the artificial board to obtain the decorative paper veneer artificial board. And testing the relevant physical properties of the impregnated decorative paper according to national standards GB/T28995 and 2012, GB/T15102-2017 and GB/T17657 and 2013.
The invention has the following advantages:
1) the prepared adhesive for the impregnated bond paper has no free formaldehyde release, and the non-hydroformylation of the impregnated decorative paper facing artificial board is realized after the adhesive is hot pressed to the formaldehyde-free artificial board; the adhesive has small particle size, small molecular weight and moderate viscosity, so that the adhesive can well permeate into paper, and the problem of damage between papers of decorative paper after the common resin adhesive is impregnated is solved.
Meanwhile, the introduced filler enables the adhesive system to improve the solid content under the condition of little influence on the viscosity, thereby increasing the glue hanging amount of the impregnated bond paper and improving the scratch resistance of the facing artificial board to a certain extent.
2) Aiming at the aqueous polyurethane compound adhesive, the conditions of impregnation, drying and hot pressing of the base paper are correspondingly adjusted, and more targeted impregnation time length, drying temperature, hot pressing pressure, hot pressing temperature and time length are adopted, so that a better impregnated bond paper veneering effect is achieved, and the impregnated bond paper veneer formaldehyde-free artificial board and the preparation method thereof are obtained.
Detailed Description
Example 1
1) Adding polyethylene glycol (molecular weight 200) and isophorone diisocyanate into a reaction kettle with a stirring and refluxing device according to a molar ratio of 0.8, and carrying out prepolymerization reaction at 40 ℃ for 1h under the protection of high-purity nitrogen to obtain the polyurethane prepolymer.
2) Heating the prepolymer to 65 ℃, dropwise adding 1, 4-butanediol into the prepolymer for 20min, performing chain extension reaction for 1.5h, and stirring at a speed of 50 r/min. Then the temperature is reduced to 40 ℃, the hydrophilic agent is added, the addition is completed within 30min, and the reaction time of the step is 0.5 h.
3) Cooling to room temperature, adding glacial acetic acid for neutralization, simultaneously using a proper amount of acetone for viscosity reduction, adding water after proper viscosity, shearing at high speed, wherein the shearing speed is 2000r/min, and evaporating to remove acetone to obtain the aqueous polyurethane emulsion.
4) The aldehyde-free adhesive for the decorative paper comprises the following components in parts by mass:
aqueous polyurethane emulsion: 30 portions of
Nano-cellulose: 5 portions of
Titanium dioxide (particle size 100 nm): 10 portions of
Water: 200 parts.
According to the formula proportion, adding the nano-cellulose into water and the aqueous polyurethane emulsion at room temperature, and stirring for 10min at the speed of 500 r/min; and then regulating the stirring speed to 1000r/min, simultaneously adding a filler, continuously stirring for 20min, and standing to obtain the aldehyde-free adhesive for the impregnated bond paper.
Completely soaking paper in the formaldehyde-free soaking adhesive for 20s, and then drying at 75 ℃ until no redundant glue solution exists on the paper surface; after drying, the paper was completely immersed in the above adhesive for 30 seconds, and then completely dried at 105 ℃. Selecting an aldehyde-free artificial board, and hot-pressing the impregnated bond paper on the artificial board for 1min at the pressure of 4Mpa and the temperature of 210 ℃ to obtain the aldehyde-free artificial board with the impregnated bond paper facing. And testing the relevant physical properties of the impregnated decorative paper according to national standards GB/T28995 and 2012, GB/T15102 and 2017 and GB/T17657 and 2013.
Example 2
1) Adding polyester diol CMA-1024 and isophorone diisocyanate into a reaction kettle with a stirring and refluxing device according to the molar ratio of 2, and carrying out prepolymerization reaction at the reaction temperature of 60 ℃ for 0.5h under the protection of high-purity nitrogen to obtain a polyurethane prepolymer.
2) Heating the prepolymer to 80 ℃, dropwise adding ethylene glycol into the prepolymer for 10min, performing chain extension reaction for 0.5h, and stirring at 100 r/min. Then the temperature is reduced to 60 ℃, the hydrophilic agent is added, the addition is finished within 30min, and the reaction time of the step is 1.5 h.
3) Cooling to room temperature, adding glacial acetic acid for neutralization, simultaneously using a proper amount of acetone for viscosity reduction, adding water after proper viscosity and shearing at high speed, wherein the shearing speed is 4000r/min, and evaporating and removing the acetone to obtain the aqueous polyurethane emulsion; .
4) The aldehyde-free adhesive for the decorative paper comprises the following components in parts by mass:
aqueous polyurethane emulsion: 50 portions of
Nano-cellulose: 1 part of
Alumina (particle size 100 nm): 5 portions of
Water: 300 parts.
According to the formula proportion, adding the nano-cellulose into water and the aqueous polyurethane emulsion at room temperature, and stirring for 5min at the speed of 800 r/min; and then regulating the stirring speed to 3000r/min, simultaneously adding a filler, continuously stirring for 30min, and standing to obtain the aldehyde-free adhesive for the impregnated bond paper.
Completely soaking paper in the formaldehyde-free soaking adhesive for 40s, and drying at 105 ℃ until no redundant glue solution exists on the paper surface; after drying, the paper was completely immersed in the above adhesive for 10 seconds, and then completely dried at 85 ℃. Selecting an aldehyde-free artificial board, and hot-pressing the impregnated bond paper on the artificial board for 3min at the pressure of 6Mpa and the temperature of 150 ℃ to obtain the aldehyde-free artificial board with the impregnated bond paper facing. And testing the relevant physical properties of the impregnated decorative paper according to national standards GB/T28995 and 2012, GB/T15102 and 2017 and GB/T17657 and 2013.
Example 3
1) Adding polyester diol CMA-1024, polyethylene glycol (the molar ratio of the two is 1: 1) and hexamethylene diisocyanate into a reaction kettle with a stirring and refluxing device according to the molar ratio of 1.3, and carrying out prepolymerization reaction at the reaction temperature of 50 ℃ for 0.7h under the protection of high-purity nitrogen to obtain the polyurethane prepolymer.
2) Heating the prepolymer to 75 ℃, dropwise adding propylene glycol into the prepolymer for 15min, performing chain extension reaction for 0.8h, and stirring at 80 r/min. Then cooling to 50 ℃, adding the hydrophilic agent, and finishing the addition within 30min, wherein the reaction time is 1 h.
3) Cooling to room temperature, adding glacial acetic acid for neutralization, simultaneously using a proper amount of acetone for viscosity reduction, adding water after proper viscosity, performing high-speed shearing at the shearing speed of 3000r/min, and evaporating to remove acetone to obtain the aqueous polyurethane emulsion; .
4) The aldehyde-free adhesive for the decorative paper comprises the following components in parts by mass:
aqueous polyurethane emulsion: 40 portions of
Nano-cellulose: 3 portions of
4 portions of silicon dioxide (with the grain diameter of 100nm) and 3 portions of zinc dioxide (with the grain diameter of 50nm)
Water: 250 parts of the raw materials.
According to the formula proportion, adding the nano-cellulose into water and the aqueous polyurethane emulsion at room temperature, and stirring for 7min at 650 r/min; and then regulating the stirring speed to 2000r/min, simultaneously adding a filler, continuously stirring for 25min, and standing to obtain the aldehyde-free adhesive for the impregnated bond paper.
Completely soaking paper in the formaldehyde-free soaking adhesive for 30s, and then drying at 95 ℃ until no redundant glue solution exists on the paper surface; after drying, the paper was completely immersed in the above adhesive for 20 seconds, and then completely dried at 100 ℃. Selecting an aldehyde-free artificial board, and hot-pressing the impregnated bond paper on the artificial board for 2min at the pressure of 5Mpa and the temperature of 170 ℃ to obtain the aldehyde-free artificial board with the impregnated bond paper facing. And testing the relevant physical properties of the impregnated decorative paper according to national standards GB/T28995 and 2012, GB/T15102 and 2017 and GB/T17657 and 2013.
Comparative example 1
The difference from the technical solution of example 1 is that no nanocellulose and no filler are added.
TABLE 1 comparison of physical Properties of impregnated bond paper and veneer
a.CN 110450239 A b.CN 109776717 A
The test is according to national standard: GB/T28995-2012, GB/T17657-2013, GB/T15102-2017
The impregnated bond paper prepared by the adhesive has no release of free formaldehyde, and compared with the published polyurethane formaldehyde-free adhesive and acrylate adhesive, the adhesive has better permeability, surface bonding performance and scratch resistance, and meets the requirements of related national standards. The filler in the adhesive formula increases the adhesive hanging amount of the impregnated bond paper, and improves the scratch resistance and wear resistance of the product to a certain extent.
Claims (10)
1. A preparation method of an impregnated bond paper veneer formaldehyde-free artificial board is characterized by comprising the following steps: completely soaking paper in the formaldehyde-free soaking adhesive for 20-40s, and drying at 75-105 ℃ until no excessive glue solution exists on the paper surface; and after drying, completely soaking the paper in the adhesive for 10-30s, and completely drying at 85-105 ℃. Selecting an aldehyde-free artificial board, and hot-pressing the impregnated bond paper on the artificial board for 1-3min at the pressure of 4-6Mpa and the temperature of 150-.
2. The preparation method of claim 1, wherein the aldehyde-free impregnating adhesive comprises the following components in parts by mass:
aqueous polyurethane emulsion: 30-50 parts of
Nano-cellulose: 1-5 parts of
Filling: 5-10 parts of
Water: 200 portions and 300 portions.
3. The preparation method of claim 2, wherein the formula of the aqueous polyurethane emulsion is as follows: the molar ratio of the dihydric alcohol to the diisocyanate is 0.8-2, the molar part of the dihydric alcohol is 20-40, the chain extender is 3-8, the hydrophilic agent is 5-10, the glacial acetic acid is 0.1-1 and the water is 50-80.
4. The method according to claim 3, wherein the diol comprises one or more of polyester diol and polyether diol containing no aliphatic ring or aromatic ring.
5. The method according to claims 3 to 4, wherein the diisocyanate comprises one or more of isophorone diisocyanate (IPDI), diphenylmethane diisocyanate (MDI), dicyclohexylmethane diisocyanate (HMDI), Hexamethylene Diisocyanate (HDI), and Lysine Diisocyanate (LDI).
6. The preparation method according to any one of claims 3 to 5, wherein the chain extender is one of ethylene glycol, propylene glycol, 1, 4-butanediol, diethylene glycol and 1, 4-cyclohexanediol.
7. The method according to any one of claims 3 to 6, wherein the hydrophilic agent is N-Methyldiethanolamine (MDEA), and the soft monomer is one or more of methyl acrylate, butyl acrylate, ethyl acrylate and N-octyl acrylate.
8. The preparation method according to any one of claims 2 to 7, wherein the nanocellulose is dialdehyde-modified nanocellulose, the solid content is 0.5 to 3 percent, and the particle size is 20 to 50 nm.
9. The preparation method according to any one of claims 2 to 8, characterized in that the filler is a titanium dioxide suspension with a particle size of 50-200nm, and the mass fraction is about 20%; silicon dioxide suspension with the particle size of 50-100nm, the mass fraction is about 10%; 50-100nm zinc dioxide suspension with the mass fraction of about 10%; alumina suspension with the grain diameter of 50-200nm, and the mass fraction of the alumina suspension is about 10 percent or the combination of a plurality of alumina suspensions.
10. The method according to any one of claims 2 to 9, wherein the aldehyde-free adhesive is prepared by the following method:
1) adding dihydric alcohol and diisocyanate into a reaction kettle with a stirring and refluxing device according to a ratio, and carrying out prepolymerization reaction under the protection of high-purity nitrogen at the reaction temperature of 40-60 ℃ for 0.5-1h to obtain a polyurethane prepolymer;
2) heating the prepolymer to 65-80 ℃, dropwise adding a chain extender into the prepolymer for 10-20min, carrying out chain extension reaction for 0.5-1.5h at a stirring speed of 50-100r/min, then cooling to 40-60 ℃, adding a hydrophilic agent, and finishing the addition within 30min, wherein the reaction time is 0.5-1.5 h;
3) cooling to room temperature, adding glacial acetic acid for neutralization, simultaneously using a proper amount of acetone for viscosity reduction, adding water after proper viscosity and shearing at high speed, wherein the shearing speed is 2000-; the solid content of the emulsion is 20 percent, the particle diameter is 50-100nm, the viscosity is 50-100cp, and the molecular weight is 500-;
4) according to the formula proportion, the nano-cellulose is put into water and the aqueous polyurethane emulsion at room temperature, and stirred for 5-10min at the speed of 500-; then the stirring speed is adjusted to 1000-3000r/min, simultaneously the filler is added into the mixture, the mixture is continuously stirred for 10-20min and is kept stand, and the catalyst is obtained.
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| CN112900146A (en) * | 2021-03-03 | 2021-06-04 | 东莞市贝辉装饰材料有限公司 | Impregnated adhesive film paper with fragrance and preparation method thereof |
| CN112921707A (en) * | 2021-03-03 | 2021-06-08 | 东莞市贝辉装饰材料有限公司 | Formaldehyde-free impregnated bond paper and preparation method thereof |
| CN113134879A (en) * | 2021-04-20 | 2021-07-20 | 中国林业科学研究院木材工业研究所 | Fragrance-releasing decorative artificial board and preparation method thereof |
| CN113733262A (en) * | 2021-08-30 | 2021-12-03 | 雪宝家居集团有限公司 | Surface dipping wear-resistant treatment process for environment-friendly plate |
| CN114351503A (en) * | 2022-01-10 | 2022-04-15 | 山东坤瀚新材料科技有限公司 | Latex for waterproof abrasive paper and using method thereof |
| CN114855499A (en) * | 2022-05-26 | 2022-08-05 | 浙江夏王纸业有限公司 | Screening and preparation method of non-aldehyde impregnating resin for pre-impregnated paper |
| CN115450068A (en) * | 2022-09-29 | 2022-12-09 | 广东天元汇邦新材料股份有限公司 | Non-formaldehyde facing paper solidified by electron beam and preparation method and application thereof |
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| CN112900146A (en) * | 2021-03-03 | 2021-06-04 | 东莞市贝辉装饰材料有限公司 | Impregnated adhesive film paper with fragrance and preparation method thereof |
| CN112921707A (en) * | 2021-03-03 | 2021-06-08 | 东莞市贝辉装饰材料有限公司 | Formaldehyde-free impregnated bond paper and preparation method thereof |
| CN113134879A (en) * | 2021-04-20 | 2021-07-20 | 中国林业科学研究院木材工业研究所 | Fragrance-releasing decorative artificial board and preparation method thereof |
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| CN115450068A (en) * | 2022-09-29 | 2022-12-09 | 广东天元汇邦新材料股份有限公司 | Non-formaldehyde facing paper solidified by electron beam and preparation method and application thereof |
| CN115450068B (en) * | 2022-09-29 | 2023-12-29 | 广东天元汇邦新材料股份有限公司 | Formaldehyde-free facing paper solidified by electron beam, its preparation method and application |
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