CN111471403A - Formaldehyde-free environment-friendly wood adhesive and preparation method thereof - Google Patents
Formaldehyde-free environment-friendly wood adhesive and preparation method thereof Download PDFInfo
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- CN111471403A CN111471403A CN202010382419.3A CN202010382419A CN111471403A CN 111471403 A CN111471403 A CN 111471403A CN 202010382419 A CN202010382419 A CN 202010382419A CN 111471403 A CN111471403 A CN 111471403A
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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
- C09J4/00—Adhesives based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; adhesives, based on monomers of macromolecular compounds of groups C09J183/00 - C09J183/16
- C09J4/06—Organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond in combination with a macromolecular compound other than an unsaturated polymer of groups C09J159/00 - C09J187/00
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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
- C09J11/02—Non-macromolecular additives
- C09J11/06—Non-macromolecular additives organic
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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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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Adhesives Or Adhesive Processes (AREA)
Abstract
The invention relates to the technical field of adhesives for wood, in particular to an aldehyde-free environment-friendly wood adhesive and a preparation method thereof; the adhesive comprises the following raw materials in parts by weight: 50-70 parts of fish gelatin, 12-16 parts of modified epoxy resin, 15-20 parts of vinyl acetate-ethylene copolymer resin, 8-14 parts of glycidyl methacrylate, 7-12 parts of nano copper oxide, 6-10 parts of phosphoric acid, 6-8 parts of nano aluminum hydroxide, 8-11 parts of nano silicon carbide, 2.3-2.8 parts of dibutyl phthalate, 1.7-2.5 parts of hydroxyl silicone oil, 1.2-1.6 parts of defoaming agent, 1.4-1.8 parts of emulsifying agent, 2.8-3.6 parts of tackifier, 100-containing materials of deionized water 120 parts and a proper amount of tea polyphenol; compared with the existing similar products, the wood adhesive prepared by the invention has better bonding effect on wood and further improves the aging resistance; meanwhile, the environment-friendly paint does not contain aldehydes, is relatively healthy and environment-friendly, and accords with the currently advocated green and environment-friendly idea; moreover, the heat-resistant rubber also has good heat-resistant performance.
Description
Technical Field
The invention relates to the technical field of adhesives for wood, in particular to an aldehyde-free environment-friendly wood adhesive and a preparation method thereof.
Background
The wood adhesive is a material for bonding wood and the surface of wood or other objects into a whole. With the advent of new adhesives, and the continued improvement of the methods of using adhesives, the definition of adhesives is also constantly evolving.
Wood adhesives can be used in the wood-working industry for the production of products such as plywood, particle board, medium density fiberboard, laminates, decorative sheathing panels, and core board, all of which require adhesives of dissimilar properties. The adhesive not only has important effects on saving wood and simplifying production process, but also can be used for adhering materials with different properties such as metal or plastic and the like with wood materials to prepare composite materials with various properties, thereby exerting the unique functions of the wood and providing some special purposes.
Most of the existing wood adhesives are aldehyde-containing products, although the existing wood adhesives can play a role in adhering wood, the aldehyde substances contained in the wood adhesives are harmful to human health and do not accord with the idea of green and environment protection advocated at present. Further, the aging resistance and heat resistance of the present application are relatively poor. Therefore, the technical problem to be solved by the technicians in the field is to provide the aldehyde-free environment-friendly wood adhesive and the preparation method thereof.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides an aldehyde-free environment-friendly wood adhesive and a preparation method thereof, which can effectively solve the technical problems in the background art.
Technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme:
the formaldehyde-free environment-friendly wood adhesive comprises the following raw materials in parts by weight: 50-70 parts of fish gelatin, 12-16 parts of modified epoxy resin, 15-20 parts of vinyl acetate-ethylene copolymer resin, 8-14 parts of glycidyl methacrylate, 7-12 parts of nano copper oxide, 6-10 parts of phosphoric acid, 6-8 parts of nano aluminum hydroxide, 8-11 parts of nano silicon carbide, 2.3-2.8 parts of dibutyl phthalate, 1.7-2.5 parts of hydroxyl silicone oil, 1.2-1.6 parts of defoaming agent, 1.4-1.8 parts of emulsifying agent, 2.8-3.6 parts of tackifier, 100-containing materials of deionized water and 120 parts of proper amount of tea polyphenol.
Further, the preparation method of the modified epoxy resin comprises the following steps: mixing epoxy resin and carbon fiber powder according to the mass ratio of 5-8: 1, heating the mixture at the temperature of 100-120 ℃ after uniformly mixing, and pre-reacting for 60-80 min; and mixing and stirring ethylene glycol diglycidyl ether and a curing agent, uniformly stirring, performing vacuum defoaming treatment, curing at room temperature for 22-28h, and curing at the temperature of 100-120 ℃ for 3-4h to obtain the modified epoxy resin.
Furthermore, the defoaming agent is tributyl phosphate or polydimethylsiloxane.
Furthermore, the emulsifier is castor oil polyoxyethylene ether or monoglyceride fatty acid glyceride.
Furthermore, the tackifier is petroleum resin or rosin resin.
Furthermore, the curing agent is polyamide curing agent 651, and the dosage of the polyamide curing agent is 13-16% of that of the epoxy resin.
Further, the ethylene glycol diglycidyl ether is used in an amount of 8 to 12% of the epoxy resin.
The preparation method of the formaldehyde-free environment-friendly wood adhesive comprises the following steps:
s1, placing the fish gelatin in a reaction kettle, adding deionized water into the reaction kettle, soaking for 25-30h at 25-35 ℃, raising the temperature of the deionized water in the reaction kettle to 55-65 ℃, simultaneously adding tea polyphenol with the mass of 5.8-8.5% of the fish gelatin into the reaction kettle, stirring for 30-40min at the rotation speed of 200 plus 400rpm, and recording the mixture as a first mixed component;
s2, adding the modified epoxy resin, the vinyl acetate-ethylene copolymer resin and the glycidyl methacrylate into the first mixed component obtained in the step a, heating to 50-65 ℃, and stirring the mixed component at the rotation speed of 100-150rpm for 20-30min to obtain a second mixed component;
s3, sequentially adding nano copper oxide, phosphoric acid, nano aluminum hydroxide and nano silicon carbide into the second mixed component obtained in S2, stirring at the rotating speed of 300-5000 rpm for 10-15min, adding dibutyl phthalate, hydroxyl silicone oil and the rest raw materials into the second mixed component, transferring the mixture in the reaction kettle into an emulsifying machine, and shearing at the rotating speed of 4000-5000rpm for 5-8 min;
and S4, pouring out the mixture obtained in the step S3 from an emulsifying machine, and naturally cooling to room temperature at room temperature to obtain the finished product of the formaldehyde-free environment-friendly wood adhesive.
Advantageous effects
Compared with the known public technology, the technical scheme provided by the invention has the following beneficial effects:
the invention adopts fish glue, modified epoxy resin, vinyl acetate-ethylene copolymer resin and the like as raw materials for preparing the wood adhesive. Compared with the existing similar products, the prepared wood adhesive has better bonding effect on wood, and the aging resistance of the wood adhesive is further improved. Meanwhile, the environment-friendly paint does not contain aldehydes, is relatively healthy and environment-friendly, and accords with the idea of green and environment protection advocated at present. In addition, the invention takes the nano copper oxide, the phosphoric acid, the nano aluminum hydroxide and the nano silicon carbide as the raw materials for preparing the wood adhesive, thereby not only obviously improving the bonding performance of the prepared wood adhesive, but also obviously improving the heat resistance of the wood adhesive. In addition, the use of the polyamide curing agent not only enables the curing speed of the prepared wood adhesive to be higher, but also can obviously improve the bonding force, and greatly improves and improves the bonding effect.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The present invention will be further described with reference to the following examples.
Example 1
The formaldehyde-free environment-friendly wood adhesive is characterized by comprising the following raw materials in parts by weight: 55 parts of fish gelatin, 12 parts of modified epoxy resin, 17 parts of vinyl acetate-ethylene copolymer resin, 8 parts of glycidyl methacrylate, 9 parts of nano copper oxide, 6 parts of phosphoric acid, 7 parts of nano aluminum hydroxide, 8 parts of nano silicon carbide, 2.5 parts of dibutyl phthalate, 1.7 parts of hydroxyl silicone oil, 1.4 parts of defoaming agent, 1.4 parts of emulsifier, 3.0 parts of tackifier, 100 parts of deionized water and a proper amount of tea polyphenol.
The preparation method of the modified epoxy resin comprises the following steps: mixing epoxy resin and carbon fiber powder according to a mass ratio of 5: 1, uniformly mixing, heating at 100 ℃, and pre-reacting for 60 min; and mixing and stirring the ethylene glycol diglycidyl ether and the curing agent, uniformly stirring, performing vacuum defoaming treatment, curing at room temperature for 22 hours, and curing at 100 ℃ for 3 hours to obtain the modified epoxy resin.
Tributyl phosphate is selected as the defoaming agent.
The emulsifier is castor oil polyoxyethylene ether.
The tackifier is petroleum resin.
The curing agent is polyamide curing agent 651, and the dosage of the polyamide curing agent is 13% of that of the epoxy resin.
The usage amount of the ethylene glycol diglycidyl ether is 8 percent of the epoxy resin.
The preparation method of the formaldehyde-free environment-friendly wood adhesive comprises the following steps:
s1, placing the fish gelatin in a reaction kettle, adding deionized water into the reaction kettle, soaking for 25 hours at 25 ℃, heating the deionized water in the reaction kettle to 55 ℃, simultaneously adding tea polyphenol with the mass of 5.8% of the fish gelatin into the reaction kettle, and stirring for 30 minutes at the rotation speed of 200rpm to obtain a first mixed component;
s2, adding the modified epoxy resin, the vinyl acetate-ethylene copolymer resin and the glycidyl methacrylate into the first mixed component obtained in the step a, heating to 50 ℃, and stirring the mixed component for 20min at the rotating speed of 100rpm to obtain a second mixed component;
s3, sequentially adding nano copper oxide, phosphoric acid, nano aluminum hydroxide and nano silicon carbide into the second mixed component obtained in the step S2, stirring at the rotating speed of 300rpm for 10min, adding dibutyl phthalate, hydroxyl silicone oil and the rest raw materials into the second mixed component, transferring the mixture in the reaction kettle into an emulsifying machine, and shearing at the rotating speed of 4000rpm for 5 min;
and S4, pouring out the mixture obtained in the step S3 from an emulsifying machine, and naturally cooling to room temperature at room temperature to obtain the finished product of the formaldehyde-free environment-friendly wood adhesive.
Example 2
The formaldehyde-free environment-friendly wood adhesive is characterized by comprising the following raw materials in parts by weight: 50 parts of fish gelatin, 14 parts of modified epoxy resin, 15 parts of vinyl acetate-ethylene copolymer resin, 10 parts of glycidyl methacrylate, 7 parts of nano copper oxide, 7 parts of phosphoric acid, 6 parts of nano aluminum hydroxide, 9 parts of nano silicon carbide, 2.3 parts of dibutyl phthalate, 2.0 parts of hydroxyl silicone oil, 1.2 parts of defoaming agent, 1.5 parts of emulsifying agent, 2.8 parts of tackifier, 105 parts of deionized water and a proper amount of tea polyphenol.
The preparation method of the modified epoxy resin comprises the following steps: mixing epoxy resin and carbon fiber powder according to a mass ratio of 6: 1, uniformly mixing, heating at 110 ℃, and pre-reacting for 65 min; and mixing and stirring the ethylene glycol diglycidyl ether and the curing agent, uniformly stirring, performing vacuum defoaming treatment, curing at room temperature for 25 hours, and curing at 110 ℃ for 3 hours to obtain the modified epoxy resin.
The defoaming agent is polydimethylsiloxane.
The emulsifier is monoglyceride fatty acid glyceride.
The tackifier is rosin resin.
The curing agent is polyamide curing agent 651, and the dosage of the polyamide curing agent is 14% of that of the epoxy resin.
The usage amount of the ethylene glycol diglycidyl ether is 10 percent of the epoxy resin.
The preparation method of the formaldehyde-free environment-friendly wood adhesive comprises the following steps:
s1, placing the fish gelatin in a reaction kettle, adding deionized water into the reaction kettle, soaking for 27 hours at the temperature of 30 ℃, raising the temperature of the deionized water in the reaction kettle to 60 ℃, simultaneously adding tea polyphenol with the mass of 6.5% of the fish gelatin into the reaction kettle, and stirring for 35 minutes at the rotating speed of 300rpm to obtain a first mixed component;
s2, adding the modified epoxy resin, the vinyl acetate-ethylene copolymer resin and the glycidyl methacrylate into the first mixed component obtained in the step a, heating to 55 ℃, and stirring the mixed component for 25min at the rotating speed of 120rpm to obtain a second mixed component;
s3, sequentially adding nano copper oxide, phosphoric acid, nano aluminum hydroxide and nano silicon carbide into the second mixed component obtained in the step S2, stirring at the rotating speed of 360rpm for 10min, adding dibutyl phthalate, hydroxyl silicone oil and the rest raw materials into the second mixed component, transferring the mixture in the reaction kettle into an emulsifying machine, and shearing at the rotating speed of 4500rpm for 6 min;
and S4, pouring out the mixture obtained in the step S3 from an emulsifying machine, and naturally cooling to room temperature at room temperature to obtain the finished product of the formaldehyde-free environment-friendly wood adhesive.
Example 3
The formaldehyde-free environment-friendly wood adhesive is characterized by comprising the following raw materials in parts by weight: 70 parts of fish gelatin, 15 parts of modified epoxy resin, 20 parts of vinyl acetate-ethylene copolymer resin, 12 parts of glycidyl methacrylate, 12 parts of nano copper oxide, 8 parts of phosphoric acid, 8 parts of nano aluminum hydroxide, 10 parts of nano silicon carbide, 2.8 parts of dibutyl phthalate, 2.3 parts of hydroxyl silicone oil, 1.6 parts of defoaming agent, 1.6 parts of emulsifying agent, 3.0 parts of tackifier, 110 parts of deionized water and a proper amount of tea polyphenol.
The preparation method of the modified epoxy resin comprises the following steps: mixing epoxy resin and carbon fiber powder according to a mass ratio of 7: 1, uniformly mixing, heating at 115 ℃, and pre-reacting for 70 min; and mixing and stirring the ethylene glycol diglycidyl ether and the curing agent, uniformly stirring, performing vacuum defoaming treatment, curing at room temperature for 26 hours, and curing at 115 ℃ for 4 hours to obtain the modified epoxy resin.
Tributyl phosphate is selected as the defoaming agent.
The emulsifier is castor oil polyoxyethylene ether.
The tackifier is petroleum resin.
The curing agent is polyamide curing agent 651, and the dosage of the polyamide curing agent is 15% of that of the epoxy resin.
The usage amount of the ethylene glycol diglycidyl ether is 11 percent of the epoxy resin.
The preparation method of the formaldehyde-free environment-friendly wood adhesive comprises the following steps:
s1, placing the fish gelatin in a reaction kettle, adding deionized water into the reaction kettle, soaking for 28 hours at 32 ℃, heating the deionized water in the reaction kettle to 60 ℃, simultaneously adding tea polyphenol with the mass of 7.0% of the fish gelatin into the reaction kettle, and stirring for 35 minutes at the rotating speed of 360rpm to obtain a first mixed component;
s2, adding the modified epoxy resin, the vinyl acetate-ethylene copolymer resin and the glycidyl methacrylate into the first mixed component obtained in the step a, heating to 60 ℃, and stirring the mixed component for 25min at the rotating speed of 120rpm to obtain a second mixed component;
s3, sequentially adding nano copper oxide, phosphoric acid, nano aluminum hydroxide and nano silicon carbide into the second mixed component obtained in the step S2, stirring for 15min at the rotating speed of 420rpm, adding dibutyl phthalate, hydroxyl silicone oil and the rest raw materials into the second mixed component, transferring the mixture in the reaction kettle into an emulsifying machine, and shearing for 7min at the rotating speed of 4800 rpm;
and S4, pouring out the mixture obtained in the step S3 from an emulsifying machine, and naturally cooling to room temperature at room temperature to obtain the finished product of the formaldehyde-free environment-friendly wood adhesive.
Example 4
The formaldehyde-free environment-friendly wood adhesive is characterized by comprising the following raw materials in parts by weight: 60 parts of fish gelatin, 16 parts of modified epoxy resin, 18 parts of vinyl acetate-ethylene copolymer resin, 14 parts of glycidyl methacrylate, 10 parts of nano copper oxide, 10 parts of phosphoric acid, 7 parts of nano aluminum hydroxide, 11 parts of nano silicon carbide, 2.6 parts of dibutyl phthalate, 2.5 parts of hydroxyl silicone oil, 1.5 parts of defoaming agent, 1.8 parts of emulsifying agent, 3.4 parts of tackifier, 120 parts of deionized water and a proper amount of tea polyphenol.
The preparation method of the modified epoxy resin comprises the following steps: mixing epoxy resin and carbon fiber powder according to a mass ratio of 8: 1, uniformly mixing, heating at 120 ℃, and pre-reacting for 80 min; and mixing and stirring the ethylene glycol diglycidyl ether and the curing agent, uniformly stirring, performing vacuum defoaming treatment, curing at room temperature for 28 hours, and curing at 120 ℃ for 4 hours to obtain the modified epoxy resin.
The defoaming agent is polydimethylsiloxane.
The emulsifier is monoglyceride fatty acid glyceride.
The tackifier is rosin resin.
The curing agent is polyamide curing agent 651, and the dosage of the polyamide curing agent is 16% of that of the epoxy resin.
The usage amount of the ethylene glycol diglycidyl ether is 12 percent of the epoxy resin.
The preparation method of the formaldehyde-free environment-friendly wood adhesive comprises the following steps:
s1, placing the fish gelatin in a reaction kettle, adding deionized water into the reaction kettle, soaking for 30 hours at 35 ℃, heating the deionized water in the reaction kettle to 65 ℃, simultaneously adding tea polyphenol with the mass of 8.5% of the fish gelatin into the reaction kettle, and stirring for 40 minutes at the rotation speed of 400rpm to obtain a first mixed component;
s2, adding the modified epoxy resin, the vinyl acetate-ethylene copolymer resin and the glycidyl methacrylate into the first mixed component obtained in the step a, heating to 65 ℃, and stirring the mixed component for 30min at the rotating speed of 150rpm to obtain a second mixed component;
s3, sequentially adding nano copper oxide, phosphoric acid, nano aluminum hydroxide and nano silicon carbide into the second mixed component obtained in the step S2, stirring for 15min at the rotating speed of 500rpm, adding dibutyl phthalate, hydroxyl silicone oil and the rest raw materials into the second mixed component, transferring the mixture in the reaction kettle into an emulsifying machine, and shearing for 8min at the rotating speed of 5000 rpm;
and S4, pouring out the mixture obtained in the step S3 from an emulsifying machine, and naturally cooling to room temperature at room temperature to obtain the finished product of the formaldehyde-free environment-friendly wood adhesive.
Performance detection
Comparative example: a wood adhesive produced by chemical industry Limited in Zhejiang.
The wood adhesives prepared in comparative example and examples 1 to 4 were respectively adhered to wood and cured at 25 c for 5 days, and then the shear strength and elongation at break of the wood adhesives prepared in comparative example and examples 1 to 4 were measured at different temperatures. The wood adhesives prepared in comparative examples and examples 1-4 were tested for bond strength at the same time and the data reported in the following table:
note: the method for detecting the bonding strength comprises the following steps: and manufacturing a test piece according to GB/T17657, and detecting the bonding strength of the test piece.
As can be seen from the data in the above table, the wood adhesive prepared according to the present invention has better adhesive property, aging resistance and better high temperature resistance compared to the wood adhesive provided by the comparative example. The wood adhesive prepared by the invention has wider prospect. Is more suitable for popularization.
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 the modifications or the substitutions do not cause the essence of the corresponding technical solutions to depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (8)
1. The formaldehyde-free environment-friendly wood adhesive is characterized by comprising the following raw materials in parts by weight: 50-70 parts of fish gelatin, 12-16 parts of modified epoxy resin, 15-20 parts of vinyl acetate-ethylene copolymer resin, 8-14 parts of glycidyl methacrylate, 7-12 parts of nano copper oxide, 6-10 parts of phosphoric acid, 6-8 parts of nano aluminum hydroxide, 8-11 parts of nano silicon carbide, 2.3-2.8 parts of dibutyl phthalate, 1.7-2.5 parts of hydroxyl silicone oil, 1.2-1.6 parts of defoaming agent, 1.4-1.8 parts of emulsifying agent, 2.8-3.6 parts of tackifier, 100-containing materials of deionized water and 120 parts of proper amount of tea polyphenol.
2. The aldehyde-free environment-friendly wood adhesive according to claim 1, wherein the preparation method of the modified epoxy resin comprises the following steps: mixing epoxy resin and carbon fiber powder according to the mass ratio of 5-8: 1, heating the mixture at the temperature of 100-120 ℃ after uniformly mixing, and pre-reacting for 60-80 min; and mixing and stirring ethylene glycol diglycidyl ether and a curing agent, uniformly stirring, performing vacuum defoaming treatment, curing at room temperature for 22-28h, and curing at the temperature of 100-120 ℃ for 3-4h to obtain the modified epoxy resin.
3. The aldehyde-free environment-friendly wood adhesive according to claim 1, wherein: the defoaming agent is tributyl phosphate or polydimethylsiloxane.
4. The aldehyde-free environment-friendly wood adhesive according to claim 1, wherein: the emulsifier is castor oil polyoxyethylene ether or monoglyceride fatty acid glyceride.
5. The aldehyde-free environment-friendly wood adhesive according to claim 1, wherein: the tackifier is petroleum resin or rosin resin.
6. The aldehyde-free environment-friendly wood adhesive according to claim 2, wherein: the curing agent is polyamide curing agent 651, and the dosage of the polyamide curing agent is 13-16% of that of the epoxy resin.
7. The aldehyde-free environment-friendly wood adhesive according to claim 2, wherein: the dosage of the ethylene glycol diglycidyl ether is 8-12% of the epoxy resin.
8. The preparation method of the formaldehyde-free environment-friendly wood adhesive is characterized by comprising the following steps: the method comprises the following steps:
s1, placing the fish gelatin in a reaction kettle, adding deionized water into the reaction kettle, soaking for 25-30h at 25-35 ℃, raising the temperature of the deionized water in the reaction kettle to 55-65 ℃, simultaneously adding tea polyphenol with the mass of 5.8-8.5% of the fish gelatin into the reaction kettle, stirring for 30-40min at the rotation speed of 200 plus 400rpm, and recording the mixture as a first mixed component;
s2, adding the modified epoxy resin, the vinyl acetate-ethylene copolymer resin and the glycidyl methacrylate into the first mixed component obtained in the step a, heating to 50-65 ℃, and stirring the mixed component at the rotation speed of 100-150rpm for 20-30min to obtain a second mixed component;
s3, sequentially adding nano copper oxide, phosphoric acid, nano aluminum hydroxide and nano silicon carbide into the second mixed component obtained in S2, stirring at the rotating speed of 300-5000 rpm for 10-15min, adding dibutyl phthalate, hydroxyl silicone oil and the rest raw materials into the second mixed component, transferring the mixture in the reaction kettle into an emulsifying machine, and shearing at the rotating speed of 4000-5000rpm for 5-8 min;
and S4, pouring out the mixture obtained in the step S3 from an emulsifying machine, and naturally cooling to room temperature at room temperature to obtain the finished product of the formaldehyde-free environment-friendly wood adhesive.
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| CN202010382419.3A CN111471403A (en) | 2020-05-08 | 2020-05-08 | Formaldehyde-free environment-friendly wood adhesive and preparation method thereof |
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| CN202010382419.3A CN111471403A (en) | 2020-05-08 | 2020-05-08 | Formaldehyde-free environment-friendly wood adhesive and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113528060A (en) * | 2021-03-08 | 2021-10-22 | 恩平市盈嘉丰胶粘制品有限公司 | Environment-friendly adhesive and preparation method thereof |
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| EP0500092A1 (en) * | 1991-02-22 | 1992-08-26 | The Dow Chemical Company | Water thinnable epoxy resin and process for preparing same |
| CN103113847A (en) * | 2013-01-31 | 2013-05-22 | 重庆知德文化传播有限公司 | Preparation process of adhesive of bamboo product or wooden product |
| CN105086892A (en) * | 2015-09-02 | 2015-11-25 | 厦门诺维特环保科技有限公司 | High-water resistance formaldehyde-free and environment-friendly wood adhesive and preparation method thereof |
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2020
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|---|---|---|---|---|
| EP0500092A1 (en) * | 1991-02-22 | 1992-08-26 | The Dow Chemical Company | Water thinnable epoxy resin and process for preparing same |
| CN103113847A (en) * | 2013-01-31 | 2013-05-22 | 重庆知德文化传播有限公司 | Preparation process of adhesive of bamboo product or wooden product |
| CN105086892A (en) * | 2015-09-02 | 2015-11-25 | 厦门诺维特环保科技有限公司 | High-water resistance formaldehyde-free and environment-friendly wood adhesive and preparation method thereof |
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| Title |
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| 李子东 等: "《实用胶粘技术》", 31 January 2007, 国防工业出版社 * |
| 王葆华 等: "《装饰材料与施工工艺》", 30 September 2015, 华中科技大学出版社 * |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113528060A (en) * | 2021-03-08 | 2021-10-22 | 恩平市盈嘉丰胶粘制品有限公司 | Environment-friendly adhesive and preparation method thereof |
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