CN113858376A - Preparation method of high-strength environment-friendly ecological plate - Google Patents
Preparation method of high-strength environment-friendly ecological plate Download PDFInfo
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- CN113858376A CN113858376A CN202111136426.6A CN202111136426A CN113858376A CN 113858376 A CN113858376 A CN 113858376A CN 202111136426 A CN202111136426 A CN 202111136426A CN 113858376 A CN113858376 A CN 113858376A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/08—Moulding or pressing
- B27N3/10—Moulding of mats
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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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N1/00—Pretreatment of moulding material
- B27N1/02—Mixing the material with binding agent
- B27N1/0209—Methods, e.g. characterised by the composition of the agent
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/002—Manufacture of substantially flat articles, e.g. boards, from particles or fibres characterised by the type of binder
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/02—Manufacture of substantially flat articles, e.g. boards, from particles or fibres from particles
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/2805—Compounds having only one group containing active hydrogen
- C08G18/288—Compounds containing at least one heteroatom other than oxygen or nitrogen
- C08G18/289—Compounds containing at least one heteroatom other than oxygen or nitrogen containing silicon
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/62—Polymers of compounds having carbon-to-carbon double bonds
- C08G18/6291—Polymers of phosphorus containing compounds having carbon-to-carbon double bonds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/65—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen
- C08G18/6505—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen the low-molecular compounds being compounds of group C08G18/32 or polyamines of C08G18/38
- C08G18/6511—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen the low-molecular compounds being compounds of group C08G18/32 or polyamines of C08G18/38 compounds of group C08G18/3203
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/65—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen
- C08G18/6541—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen the low-molecular compounds being compounds of group C08G18/34
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/65—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen
- C08G18/6547—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen the low-molecular compounds being compounds of group C08G18/36 or hydroxylated esters of higher fatty acids of C08G18/38
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- Health & Medical Sciences (AREA)
- Polymers & Plastics (AREA)
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- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
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- Polyurethanes Or Polyureas (AREA)
Abstract
The invention relates to the technical field of household building materials, in particular to a preparation method of a high-strength environment-friendly ecological plate, which comprises the steps of mixing and stirring adhesive emulsion and wood powder uniformly, prepressing for 5-10s/mm at 1-1.5MPa and 70-80 ℃, heating to 130-150 ℃, keeping pressure and pressing for 5-10s/mm, then pressurizing to 10-12MPa, keeping temperature and pressing for 10-15s/mm to obtain a plate blank, and finally compounding a panel on the plate blank.
Description
Technical Field
The invention relates to the field of household building materials, in particular to a preparation method of a high-strength environment-friendly ecological plate.
Background
The ecological plate serving as a common plate in the fields of home decoration, plate-type furniture, cabinets, wardrobes, bathrooms and the like has the advantages of high hardness, uniform structure, good sound absorption and sound insulation performance, small formaldehyde release amount and the like, but most of the ecological plates on the market use melamine adhesive at present, and although the volatilization release of formaldehyde is reduced by a subsequent edge sealing step, certain health risks still exist.
Disclosure of Invention
The purpose of the invention is as follows: aiming at the technical problems, the invention provides a preparation method of a high-strength environment-friendly ecological plate.
The adopted technical scheme is as follows:
a preparation method of a high-strength environment-friendly ecological plate comprises the following steps:
s1: uniformly mixing fluorine-containing vegetable oil polyol and isocyanate, adding an organic tin catalyst, heating to 70-75 ℃, reacting for 1-2h, adding polyvinyl alcohol phosphate and a composite chain extender, heating to 80-85 ℃, reacting for 1-2h, cooling to 70-75 ℃, adding 1, 4-butanediol and acetone, reacting for 3-5h, cooling to 50-55 ℃, adding a capping agent, reacting for 1-1.5h, adding a neutralizing agent, reacting for 10-40min, adding water, stirring for dispersing, and finally removing acetone under reduced pressure to obtain an adhesive emulsion;
s2: mixing and stirring the adhesive emulsion and the wood powder uniformly, prepressing for 5-10s/mm at 1-1.5MPa and 70-80 ℃, heating to 130-150 ℃, keeping pressure and pressing for 5-10s/mm, then pressurizing to 10-12MPa, keeping the temperature and pressing for 10-15s/mm to obtain a plate blank, and finally compounding a panel on the plate blank.
The hot pressing time varies with the thickness of the material, and 5-10s/mm, 5-10s/mm and 10-15s/mm mean that the pressing time is prolonged by 5-10s, 5-10s and 10-15s for every 1mm of the thickness of the material.
Further, the preparation method of the fluorine-containing vegetable oil polyol comprises the following steps:
mixing trifluoroacetic acid and cyclohexane uniformly, adding strong acid cation exchange resin and epoxy vegetable oil, heating to 40-45 ℃, reacting for 6-8h, filtering, and distilling the filtrate under reduced pressure to remove small molecular fraction.
Further, the epoxidized vegetable oil is at least one of epoxidized soybean oil, epoxidized castor oil, epoxidized palm oil, epoxidized peanut oil, epoxidized linseed oil, epoxidized corn oil and epoxidized rapeseed oil, and is preferably epoxidized soybean oil.
The isocyanate is at least one of toluene diisocyanate, isophorone diisocyanate, diphenylmethane diisocyanate, dicyclohexylmethane diisocyanate, hexamethylene diisocyanate, and lysine diisocyanate, and preferably isophorone diisocyanate.
Further, the organic tin catalyst is at least one of dibutyl tin dilaurate, di-n-octyl tin dilaurate, stannous octoate, dibutyltin didodecyl sulfide and dibutyltin diacetate.
Further, the composite chain extender is a composition of diethyl dimethylolmalonate and dimethylolpropionic acid.
Further, the end-capping agent is at least one of KH-550, KH-560 and KH-570, preferably KH-550.
Further, the neutralizing agent is at least one of triethylamine, triethanolamine, N-methyldiethanolamine, ammonia water, sodium hydroxide and potassium hydroxide.
Further, the mass ratio of the adhesive emulsion to the wood powder in the S2 is 1: 3-5.
Furthermore, the temperature rising speed in S2 is 1-2 ℃/min, and the pressure increasing speed is 0.1-0.5 MPa/min.
The slab is made of wood powder, so that the slab inevitably has certain granular feel, the panel mainly plays a role in attractive decoration, the material can be a solid wood board made of fir, tung or poplar, and also can be a board made of high polymer plastics.
The invention has the beneficial effects that:
the invention provides a preparation method of a high-strength environment-friendly ecological plate, which uses fluorine-containing vegetable oil polyalcohol to replace the current commonly used polyether polyalcohol, reduces the use of pungent odor raw materials and the release amount of formaldehyde on one hand, uses the vegetable oil raw materials which are more green and environment-friendly on the other hand, accords with the idea of sustainability, improves the water resistance of an adhesive film by introducing fluorine atoms, introduces polyvinyl alcohol phosphate into a polyurethane molecular chain, has a crosslinking function in a polyurethane molecular chain segment due to the hydroxyl contained in the polyvinyl alcohol phosphate, not only increases the adhesive force of an adhesive, but also can generate special substances during combustion to play a flame-retardant effect. Meanwhile, the polyvinyl alcohol phosphate contains-O-bonds, so that the cross-linked chain segment has flexibility, siloxane can be introduced into a silane end-capping agent, the siloxane group and the surface of an organic or inorganic material have excellent adhesive bonding performance, and a C-Si-P-F flame-retardant system is formed in a polyurethane adhesive.
Detailed Description
The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
Example 1:
a preparation method of a high-strength environment-friendly ecological plate comprises the following steps:
34.2g of fluorine-containing soybean oil polyol and 27.8g of isophorone diisocyanate are added into a flask provided with a nitrogen protection and condensation device, after uniformly stirring and mixing, adding two drops of dibutyl tin dilaurate, heating to 75 ℃ for reaction for 2h, adding 2.5g of polyvinyl alcohol phosphate and 3.2g of a composite chain extender consisting of diethyl dimethylolmalonate and dimethylolpropionic acid in a mass ratio of 1:1, heating to 85 ℃, reacting for 2h, cooling to 70 ℃, adding 1, 4-butanediol and a proper amount of acetone, adding acetone for reducing the viscosity of the system, reacting for 4h, cooling to 50 ℃, adding an end-capping agent KH-5501.5 g, reacting for 1.5h, adding 2.7g of triethylamine as a neutralizing agent, reacting for 30min, adding 300g of water, stirring and dispersing, finally, removing the acetone under reduced pressure to obtain an adhesive emulsion, and mixing the adhesive emulsion with dried poplar powder according to a mass ratio of 1: 4, uniformly mixing and stirring, pouring into a mould, prepressing at 1.5MPa and 75 ℃ for 10s/mm, heating to 140 ℃, keeping pressure and pressing for 10s/mm, then pressurizing to 10MPa, keeping the temperature and pressing for 15s/mm to obtain a plate blank, drying the plate blank, and finally compounding a panel on the plate blank.
The preparation method of the fluorine-containing soybean oil polyol comprises the following steps:
mixing trifluoroacetic acid 100g and cyclohexane 1000g uniformly, adding strong acid cation exchange resin 1g and epoxidized soybean oil 100g, heating to 45 deg.C, reacting for 8h, filtering to remove resin, and distilling the filtrate under reduced pressure to remove cyclohexane, excessive trifluoroacetic acid and water generated by the reaction.
Example 2:
a preparation method of a high-strength environment-friendly ecological plate comprises the following steps:
34.2g of fluorine-containing soybean oil polyol and 27.8g of isophorone diisocyanate are added into a flask provided with a nitrogen protection and condensation device, after uniformly stirring and mixing, adding two drops of dibutyl tin dilaurate, heating to 70 ℃ for reaction for 1h, adding 2.5g of polyvinyl alcohol phosphate and 3.2g of a composite chain extender consisting of diethyl dimethylolmalonate and dimethylolpropionic acid in a mass ratio of 1:1, heating to 80 ℃ for reaction for 1h, cooling to 70 ℃, adding 1, 4-butanediol and a proper amount of acetone, adding acetone for reducing the viscosity of the system, cooling to 50 ℃ after reaction for 3h, adding an end capping agent KH-5501.5 g, adding 2.7g of triethylamine as a neutralizing agent after reaction for 1h, adding 300g of water after reaction for 10min, stirring and dispersing, finally, removing acetone under reduced pressure to obtain an adhesive emulsion, and mixing the adhesive emulsion with dried poplar powder according to a mass ratio of 1: 5, uniformly mixing and stirring, pouring into a mould, prepressing for 5s/mm at 1MPa and 70 ℃, heating to 130 ℃, keeping pressure and pressing for 5s/mm, then pressurizing to 10MPa, keeping the temperature and pressing for 10s/mm to obtain a plate blank, drying the plate blank, and finally compounding a panel on the plate blank.
The preparation method of the fluorine-containing soybean oil polyol comprises the following steps:
mixing trifluoroacetic acid 100g and cyclohexane 1000g uniformly, adding strong acid cation exchange resin 1g and epoxidized soybean oil 100g, heating to 40 deg.C, reacting for 6h, filtering to remove resin, and distilling the filtrate under reduced pressure to remove cyclohexane, excessive trifluoroacetic acid and water generated by the reaction.
Example 3:
a preparation method of a high-strength environment-friendly ecological plate comprises the following steps:
34.2g of fluorine-containing soybean oil polyol and 27.8g of isophorone diisocyanate are added into a flask provided with a nitrogen protection and condensation device, after uniformly stirring and mixing, adding two drops of dibutyl tin dilaurate, heating to 75 ℃ for reaction for 2h, adding 2.5g of polyvinyl alcohol phosphate and 3.2g of a composite chain extender consisting of diethyl dimethylolmalonate and dimethylolpropionic acid in a mass ratio of 1:1, heating to 85 ℃, reacting for 2h, cooling to 75 ℃, adding 1, 4-butanediol and a proper amount of acetone, adding acetone for reducing the viscosity of the system, cooling to 55 ℃ after reacting for 5h, adding an end-capping agent KH-5501.5 g, adding 2.7g of triethylamine as a neutralizing agent after reacting for 1.5h, adding 300g of water after reacting for 40min, stirring and dispersing, finally, removing the acetone under reduced pressure to obtain an adhesive emulsion, and mixing the adhesive emulsion with dried poplar powder according to a mass ratio of 1: 3, uniformly mixing and stirring, pouring into a mould, prepressing at 1.5MPa and 80 ℃ for 10s/mm, heating to 150 ℃, keeping pressure and pressing for 10s/mm, then pressurizing to 12MPa, keeping the temperature and pressing for 15s/mm to obtain a plate blank, drying the plate blank, and finally compounding a panel on the plate blank.
The preparation method of the fluorine-containing soybean oil polyol comprises the following steps:
mixing trifluoroacetic acid 100g and cyclohexane 1000g uniformly, adding strong acid cation exchange resin 1g and epoxidized soybean oil 100g, heating to 45 deg.C, reacting for 8h, filtering to remove resin, and distilling the filtrate under reduced pressure to remove cyclohexane, excessive trifluoroacetic acid and water generated by the reaction.
Example 4:
a preparation method of a high-strength environment-friendly ecological plate comprises the following steps:
34.2g of fluorine-containing soybean oil polyol and 27.8g of isophorone diisocyanate are added into a flask provided with a nitrogen protection and condensation device, after uniformly stirring and mixing, adding two drops of dibutyl tin dilaurate, heating to 70 ℃ for reaction for 2h, adding 2.5g of polyvinyl alcohol phosphate and 3.2g of a composite chain extender consisting of diethyl dimethylolmalonate and dimethylolpropionic acid in a mass ratio of 1:1, heating to 85 ℃, reacting for 1h, cooling to 75 ℃, adding 1, 4-butanediol and a proper amount of acetone, adding acetone for reducing the viscosity of the system, cooling to 50 ℃ after reacting for 5h, adding an end-capping agent KH-5501.5 g, adding 2.7g of triethylamine as a neutralizing agent after reacting for 1.5h, adding 300g of water after reacting for 20min, stirring and dispersing, finally, removing the acetone under reduced pressure to obtain an adhesive emulsion, and mixing the adhesive emulsion with dried poplar powder according to a mass ratio of 1: 3, uniformly mixing and stirring, pouring into a mould, prepressing for 5s/mm at 1.5MPa and 80 ℃, heating to 140 ℃, keeping pressure and pressing for 10s/mm, then pressurizing to 10MPa, keeping the temperature and pressing for 15s/mm to obtain a plate blank, drying the plate blank, and finally compounding a panel on the plate blank.
The preparation method of the fluorine-containing soybean oil polyol comprises the following steps:
mixing trifluoroacetic acid 100g and cyclohexane 1000g uniformly, adding strong acid cation exchange resin 1g and epoxidized soybean oil 100g, heating to 45 deg.C, reacting for 8h, filtering to remove resin, and distilling the filtrate under reduced pressure to remove cyclohexane, excessive trifluoroacetic acid and water generated by the reaction.
Example 5:
a preparation method of a high-strength environment-friendly ecological plate comprises the following steps:
34.2g of fluorine-containing soybean oil polyol and 27.8g of isophorone diisocyanate are added into a flask provided with a nitrogen protection and condensation device, after uniformly stirring and mixing, adding two drops of dibutyl tin dilaurate, heating to 70 ℃ for reaction for 2h, adding 2.5g of polyvinyl alcohol phosphate and 3.2g of a composite chain extender consisting of diethyl dimethylolmalonate and dimethylolpropionic acid in a mass ratio of 1:1, heating to 80 ℃ for reaction for 2h, cooling to 70 ℃, adding 1, 4-butanediol and a proper amount of acetone, adding acetone for reducing the viscosity of the system, cooling to 50 ℃ after reaction for 5h, adding an end-capping agent KH-5501.5 g, adding 2.7g of triethylamine as a neutralizing agent after reaction for 1.5h, adding 300g of water after reaction for 10min, stirring and dispersing, finally, removing acetone under reduced pressure to obtain an adhesive emulsion, and mixing the adhesive emulsion with dried poplar powder according to a mass ratio of 1: 5, uniformly mixing and stirring, pouring into a mould, prepressing for 5s/mm at 1MPa and 80 ℃, heating to 150 ℃, keeping pressure and pressing for 5s/mm, then pressurizing to 12MPa, keeping the temperature and pressing for 10s/mm to obtain a plate blank, drying the plate blank, and finally compounding a panel on the plate blank.
The preparation method of the fluorine-containing soybean oil polyol comprises the following steps:
mixing trifluoroacetic acid 100g and cyclohexane 1000g uniformly, adding strong acid cation exchange resin 1g and epoxidized soybean oil 100g, heating to 45 deg.C, reacting for 6h, filtering to remove resin, and distilling the filtrate under reduced pressure to remove cyclohexane, excessive trifluoroacetic acid and water generated by the reaction.
Example 6:
a preparation method of a high-strength environment-friendly ecological plate comprises the following steps:
34.2g of fluorine-containing soybean oil polyol and 27.8g of isophorone diisocyanate are added into a flask provided with a nitrogen protection and condensation device, after uniformly stirring and mixing, adding two drops of dibutyl tin dilaurate, heating to 75 ℃ for reaction for 1h, adding 2.5g of polyvinyl alcohol phosphate and 3.2g of a composite chain extender consisting of diethyl dimethylolmalonate and dimethylolpropionic acid in a mass ratio of 1:1, heating to 85 ℃, reacting for 1h, cooling to 75 ℃, adding 1, 4-butanediol and a proper amount of acetone, adding acetone for reducing the viscosity of the system, cooling to 55 ℃ after reacting for 3h, adding an end-capping agent KH-5501.5 g, adding 2.7g of triethylamine as a neutralizing agent after reacting for 1h, adding 300g of water after reacting for 40min, stirring and dispersing, finally, removing the acetone under reduced pressure to obtain an adhesive emulsion, and mixing the adhesive emulsion with dried poplar powder according to a mass ratio of 1: 3, uniformly mixing and stirring, pouring into a mould, prepressing at 1.5MPa and 70 ℃ for 10s/mm, heating to 130 ℃, keeping pressure and pressing for 10s/mm, then pressurizing to 10MPa, keeping the temperature and pressing for 15s/mm to obtain a plate blank, drying the plate blank, and finally compounding a panel on the plate blank.
The preparation method of the fluorine-containing soybean oil polyol comprises the following steps:
mixing trifluoroacetic acid 100g and cyclohexane 1000g uniformly, adding strong acid cation exchange resin 1g and epoxidized soybean oil 100g, heating to 40 deg.C, reacting for 8h, filtering to remove resin, and distilling the filtrate under reduced pressure to remove cyclohexane, excessive trifluoroacetic acid and water generated by the reaction.
Comparative example 1:
comparative example 1 is substantially the same as example 1 except that a commercially available soybean oil polyol (brand: Nikkai, model 4205) was used in place of the fluorinated soybean oil polyol prepared in the present invention.
Comparative example 2:
comparative example 2 is essentially the same as example 1 except that no polyvinyl alcohol phosphate was added.
Comparative example 3:
comparative example 3 is substantially the same as example 1 except that methanol is used as the end-capping agent instead of KH-550.
And (3) performance testing:
the slabs prepared by the methods of examples 1 to 6 and comparative examples 1 to 3 of the present invention were used as samples;
the samples were tested for internal bond strength, static flexural strength and modulus of elasticity with reference to GB/T4897-.
Testing the formaldehyde emission of the sample according to a dryer method in GB18580-2001, Formaldehyde emission limit in Artificial Board for interior decoration and finishing Material and products thereof;
reference is made to GB/T2406.2-2009 section 2 for determination of the burning behaviour of plastics by oxygen index method: room temperature test the limiting oxygen index of the test specimens.
The test results are shown in table 1 below:
table 1:
as can be seen from the above table 1, the ecological plate prepared by the invention has excellent mechanical properties, can meet the use requirements of daily household building materials, has low formaldehyde release amount, reaches the E0-grade national standard, has the advantages of environmental protection and no pollution, has a high limiting oxygen index, and has certain flame retardant property.
After immersing the test specimens in room temperature water for 24h, the test specimens were again tested for internal bond strength, static flexural strength and elastic modulus with reference to GB/T4897-:
table 2:
as can be seen from the above Table 2, the ecological plate prepared by the invention has excellent water resistance, and overcomes the defect that the polyurethane glue ecological plate is not water-resistant.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. The preparation method of the high-strength environment-friendly ecological plate is characterized by comprising the following steps:
s1: uniformly mixing fluorine-containing vegetable oil polyol and isocyanate, adding an organic tin catalyst, heating to 70-75 ℃, reacting for 1-2h, adding polyvinyl alcohol phosphate and a composite chain extender, heating to 80-85 ℃, reacting for 1-2h, cooling to 70-75 ℃, adding 1, 4-butanediol and acetone, reacting for 3-5h, cooling to 50-55 ℃, adding a capping agent, reacting for 1-1.5h, adding a neutralizing agent, reacting for 10-40min, adding water, stirring for dispersing, and finally removing acetone under reduced pressure to obtain an adhesive emulsion;
s2: mixing and stirring the adhesive emulsion and the wood powder uniformly, prepressing for 5-10s/mm at 1-1.5MPa and 70-80 ℃, heating to 130-150 ℃, keeping pressure and pressing for 5-10s/mm, then pressurizing to 10-12MPa, keeping the temperature and pressing for 10-15s/mm to obtain a plate blank, and finally compounding a panel on the plate blank.
2. The method for preparing the high-strength eco-friendly board as claimed in claim 1, wherein the method for preparing the fluorine-containing vegetable oil polyol comprises the following steps:
mixing trifluoroacetic acid and cyclohexane uniformly, adding strong acid cation exchange resin and epoxy vegetable oil, heating to 40-45 ℃, reacting for 6-8h, filtering, and distilling the filtrate under reduced pressure to remove small molecular fraction.
3. The method for preparing a high-strength eco-friendly ecological plate as claimed in claim 2, wherein the epoxidized vegetable oil is at least one of epoxidized soybean oil, epoxidized castor oil, epoxidized palm oil, epoxidized peanut oil, epoxidized linseed oil, epoxidized corn oil and epoxidized rapeseed oil, preferably epoxidized soybean oil.
4. The method for preparing a high-strength eco-friendly ecological plate according to claim 1, wherein the isocyanate is at least one of toluene diisocyanate, isophorone diisocyanate, diphenylmethane diisocyanate, dicyclohexylmethane diisocyanate, hexamethylene diisocyanate, and lysine diisocyanate, preferably isophorone diisocyanate.
5. The method for preparing a high-strength eco-friendly ecological plate as claimed in claim 1, wherein the organotin catalyst is at least one of dibutyl tin dilaurate, di-n-octyl tin dilaurate, stannous octoate, dibutyl tin di (dodecyl thio) and dibutyl tin diacetate.
6. The method for preparing a high-strength eco-friendly ecological plate as claimed in claim 1, wherein the composite chain extender is a composition of diethyl dimethylolmalonate and dimethylolpropionic acid.
7. The method for preparing a high-strength eco-friendly ecological plate according to claim 1, wherein the capping agent is at least one of KH-550, KH-560 and KH-570, preferably KH-550.
8. The method of claim 1, wherein the neutralizer is at least one of triethylamine, triethanolamine, N-methyldiethanolamine, ammonia, sodium hydroxide, and potassium hydroxide.
9. The method for preparing the high-strength environment-friendly ecological plate as claimed in claim 1, wherein the mass ratio of the adhesive emulsion to the wood powder in the S2 is 1: 3-5.
10. The method for preparing a high-strength eco-friendly board as claimed in claim 1, wherein the temperature rise rate in S2 is 1-2 ℃/min, and the pressurization rate is 0.1-0.5 MPa/min.
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