CN112680152A - Environment-friendly flame-retardant adhesive for plywood and preparation method thereof - Google Patents
Environment-friendly flame-retardant adhesive for plywood and preparation method thereof Download PDFInfo
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- CN112680152A CN112680152A CN202011485885.0A CN202011485885A CN112680152A CN 112680152 A CN112680152 A CN 112680152A CN 202011485885 A CN202011485885 A CN 202011485885A CN 112680152 A CN112680152 A CN 112680152A
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Abstract
The invention discloses an environment-friendly flame-retardant adhesive for plywood and a preparation method thereof, wherein the adhesive comprises the following raw materials in parts by weight: 70-100 parts of urea-formaldehyde resin, 10-25 parts of montmorillonite powder, 3-8 parts of magnesium hydroxide, 1-3 parts of phosphate, 0.5-1.5 parts of POSS (polyhedral oligomeric silsesquioxane), 5-10 parts of polyacrylamide, 10-30 parts of redispersible latex powder and 0.5-2 parts of silane coupling agent. The urea-formaldehyde resin is used as a main material, and montmorillonite powder, a flame retardant and other auxiliary materials are matched, so that the prepared adhesive has the characteristics of high bonding strength, good flame retardance, good waterproof and moisture resistance and the like, can effectively reduce the harm caused by toxic compounds such as formaldehyde and the like, meets the requirements of an environment-friendly flame retardant adhesive, and has wide application prospects in plywood processing.
Description
Technical Field
The invention relates to the technical field of adhesives, and particularly relates to an environment-friendly flame-retardant adhesive for plywood and a preparation method thereof.
Background
Three major glue species are used in the traditional plywood processing industry: urea-formaldehyde resin, phenol-formaldehyde resin and melamine formaldehyde resin have the problem of aldehyde toxic compound release in the preparation, curing and using processes, and seriously pollute the environment and harm the human health. With the gradual enhancement of people's environmental awareness and the increasing perfection of national environmental regulations, the development of nontoxic, pollution-free, green and environment-friendly adhesive for plywood has become a necessary trend for industrial development.
The urea-formaldehyde resin has the lowest price in the synthetic resin due to sufficient raw materials and low price. The urea-formaldehyde resin has many advantages, such as high adhesive strength, quick curing, light color of the cured glue layer, no pollution to the board surface of the glued compound, good water solubility and easy preparation to proper viscosity and concentration. Although the urea-formaldehyde resin is widely used in the current plywood field, the urea-formaldehyde resin is gradually eliminated by the market due to serious environmental pollution and harm to human health. Therefore, the development of environment-friendly high-performance adhesives has become a research hotspot in the field of current plywood.
In recent years, with the increasing of the living standard of people, plywood is widely applied to the industries of buildings, furniture and decoration, but the inflammability is the fatal weakness of the plywood, the application range of the plywood is inevitably limited, and therefore, the plywood is required to be subjected to flame retardant treatment. Inorganic or organic flame-retardant impregnant is mostly adopted to impregnate the veneer for the flame-retardant treatment of the plywood at home and abroad, the process is complex, the veneer has poor leaching resistance, the surface is easy to absorb moisture, and the bonding strength of the veneer is generally reduced. Therefore, in order to simplify the production process of plywood and not reduce the strength of the board, it is very necessary to provide an adhesive with a flame retardant function.
The above background disclosure is only for the purpose of assisting understanding of the inventive concept and technical solutions of the present invention, and does not necessarily belong to the prior art of the present patent application, and should not be used for evaluating the novelty and inventive step of the present application in the case that there is no clear evidence that the above content is disclosed at the filing date of the present patent application.
Disclosure of Invention
The invention provides an environment-friendly flame-retardant adhesive for plywood and a preparation method thereof, aiming at the defects of the current urea-formaldehyde resin. The urea-formaldehyde resin is used as a main material, and montmorillonite powder, a flame retardant and other auxiliary materials are matched, so that the prepared adhesive has the characteristics of high bonding strength, good flame retardance, good waterproof and moisture resistance and the like, can effectively reduce the harm caused by toxic compounds such as formaldehyde and the like, meets the requirements of an environment-friendly flame retardant adhesive, and has wide application prospects in plywood processing.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
the environment-friendly flame-retardant adhesive for the plywood comprises the following raw materials in parts by weight: 70-100 parts of urea-formaldehyde resin, 10-25 parts of montmorillonite powder, 3-8 parts of magnesium hydroxide, 1-3 parts of phosphate, 0.5-1.5 parts of POSS (polyhedral oligomeric silsesquioxane), 5-10 parts of polyacrylamide, 10-20 parts of redispersible latex powder and 0.5-2 parts of silane coupling agent.
Preferably, the POSS includes one or more of a composition of polyaminopropylmethylsilsesquioxane, dimethylsilyl cage polysilsesquioxane, and tetramethylammonio cage polysilsesquioxane.
Preferably, the redispersible latex powder is one or more of vinyl acetate and ethylene copolymer rubber powder, acrylate and styrene copolymer rubber powder and ethylene, vinyl chloride and vinyl monthly silicate ternary copolymer rubber powder.
Preferably, the silane coupling agent is one or more of KH550, KH560, KH570 and KBM 803.
Compared with the prior art, the invention also provides the following advantages and beneficial effects:
1. according to the invention, the urea-formaldehyde resin is used as a main material and is matched with auxiliary materials such as montmorillonite powder and a flame retardant, so that the prepared adhesive has the characteristics of high bonding strength, good flame retardance, good waterproof and moisture resistance and the like, can effectively reduce the harm caused by toxic compounds such as formaldehyde and the like, meets the requirements of an environment-friendly flame retardant adhesive, and has a wide application prospect in the processing of plywood.
2. According to the invention, montmorillonite powder is added into the adhesive, so that harmful gas released by urea-formaldehyde resin can be adsorbed, and the montmorillonite powder can improve the adhesive property of the adhesive.
3. According to the invention, the flame retardant composed of magnesium hydroxide, phosphate and POSS is added into the adhesive, the flame retardant effect is obvious through the synergistic effect of the organic and inorganic flame retardants, and the POSS can also change the compatibility among the magnesium hydroxide, montmorillonite powder and organic materials, improve the interface binding force and further improve the adhesive strength.
4. The polyacrylamide and the redispersible latex powder are added, so that the adhesiveness of the adhesive can be improved, and the waterproof and moisture-proof performances of the adhesive can be improved.
5. According to the invention, the silane coupling agent is added in the formula of the adhesive, so that the dispersibility and the adhesive force of the montmorillonite powder and the titanium dioxide inorganic filler in the urea-formaldehyde resin can be improved, the compatibility between the inorganic filler and the resin can be improved, the strength of the adhesive can be improved, and the waterproof, moistureproof, weather-resistant and aging-resistant performances of the adhesive can be improved.
Detailed Description
The present invention will be described in further detail with reference to specific embodiments. It should be emphasized that the following description is merely exemplary in nature and is not intended to limit the scope of the invention or its application.
Example 1
The environment-friendly flame-retardant adhesive for the plywood comprises the following raw materials in parts by weight: 85 parts of urea-formaldehyde resin, 15 parts of montmorillonite powder, 6 parts of magnesium hydroxide, 1.5 parts of phosphate, 1.2 parts of dimethyl silyl cage polysilsesquioxane, 7 parts of polyacrylamide, 15 parts of acrylate-styrene copolymer rubber and 1.0 part of KH560 silane coupling agent.
Example 2
The environment-friendly flame-retardant adhesive for the plywood comprises the following raw materials in parts by weight: 80 parts of urea-formaldehyde resin, 18 parts of montmorillonite powder, 5 parts of magnesium hydroxide, 2.2 parts of phosphate, 1.0 part of tetramethylammonium polyhedral oligomeric silsesquioxane, 10 parts of polyacrylamide, 18 parts of vinyl acetate-ethylene copolymer powder and 1.5 parts of KH570 silane coupling agent.
Example 3
The environment-friendly flame-retardant adhesive for the plywood comprises the following raw materials in parts by weight: 90 parts of urea-formaldehyde resin, 23 parts of montmorillonite powder, 6 parts of magnesium hydroxide, 3.0 parts of phosphate, 1.3 parts of poly (aminopropyl methyl silsesquioxane), 7 parts of polyacrylamide, and 15 parts of ethylene, vinyl chloride and vinyl monthly silicate ester ternary copolymer rubber powder
And 1.8 parts of KH570 silane coupling agent.
Example 4
The environment-friendly flame-retardant adhesive for the plywood comprises the following raw materials in parts by weight: 75 parts of urea-formaldehyde resin, 15 parts of montmorillonite powder, 7 parts of magnesium hydroxide, 2.0 parts of phosphate, 1.2 parts of tetramethylammonium polyhedral oligomeric silsesquioxane, 6 parts of polyacrylamide, 17 parts of ethylene, vinyl chloride and vinyl monthly silicate ternary copolymer rubber powder and 1.5 parts of KBM803 silane coupling agent.
Example 5
The environment-friendly flame-retardant adhesive for the plywood comprises the following raw materials in parts by weight: 100 parts of urea-formaldehyde resin, 20 parts of montmorillonite powder, 9 parts of magnesium hydroxide, 1.8 parts of phosphate, 1.5 parts of tetramethylammonium polyhedral oligomeric silsesquioxane, 8 parts of polyacrylamide, 12 parts of vinyl acetate and ethylene copolymer powder and 1.2 parts of KH560 silane coupling agent.
Example 6
The environment-friendly flame-retardant adhesive for the plywood comprises the following raw materials in parts by weight: 70 parts of urea-formaldehyde resin, 14 parts of montmorillonite powder, 5 parts of magnesium hydroxide, 1.2 parts of phosphate, 0.6 part of dimethyl silyl cage polysilsesquioxane, 5 parts of polyacrylamide, 15 parts of vinyl acetate and ethylene copolymer powder and 0.8 part of KH550 silane coupling agent.
The preparation method of the environment-friendly flame-retardant adhesive for the plywood comprises the following steps: adding POSS and a coupling agent into montmorillonite powder and magnesium hydroxide, adding water, and stirring to form a viscous mixture; and adding phosphate, polyacrylamide, redispersible latex powder and urea-formaldehyde resin into the viscous mixture, stirring and mixing uniformly, and packaging to obtain the environment-friendly flame-retardant adhesive for the plywood.
Comparative example 1
This example differs from example 1 in that: montmorillonite powder was not added.
Comparative example 2
This example differs from example 1 in that: no magnesium hydroxide and no phosphate were added.
Comparative example 3
This example differs from example 1 in that: no magnesium hydroxide, phosphate and dimethylsilyl cage polysilsesquioxane were added.
Comparative example 4
This example differs from example 1 in that: no polyacrylamide and no redispersible latex powder were added.
Comparative example 5
This example differs from example 1 in that: no silane coupling agent was added.
Manufacturing a test piece according to the GB/T9846.7-2004 standard, preparing a test piece veneer by using a fast-growing eucalyptus plate, and pressing the plate according to the process parameters: the test piece specification is 300mm multiplied by 9mm, the adhesives of the examples 1-5 and the comparative example are uniformly coated on the fast-growing eucalyptus single boards by adopting a manual brush coating mode, the 5 layers of plywood are assembled by using a conventional vertical texture mode, the adhesive application amount is 350-2The cold press molding process is adopted, the pressure is 1.0-1.5MPa, and the plate is unloaded after the pressure is maintained for 12 hours at room temperature. According to the conventionalThe method is used for testing the bonding strength, the water resistance, the flame retardance and the formaldehyde emission of the adhesive, and the test results are shown in table 1.
Wherein, the gluing strength refers to GB 9846-2004; the waterproof performance test is carried out on the 24h water absorption rate and the water-resistant time of the plywood according to the national standard GB/T9846-2004, wherein in the water-resistant time test, a test piece is immersed in warm water at the temperature of (60 +/-3) DEG C, and the time required by the test piece from the immersion in the water to the cracking of a glue layer is recorded; the flame retardance is detected according to GB/T2406-80, and the oxygen index of the low-formaldehyde flame-retardant plywood is detected; the formaldehyde emission was found in WB/T18580-2001.
Table 1: performance test result of plywood prepared by applying adhesive disclosed by the invention
From the test results, the adhesive provided by the invention has the characteristics of high bonding strength, good flame retardance, good waterproof and moisture resistance and the like, can effectively reduce the harm caused by toxic compounds such as formaldehyde and the like, meets the requirements of environment-friendly flame retardant adhesives, and has wide application prospects in plywood processing.
The foregoing is a more detailed description of the invention in connection with specific/preferred embodiments and is not intended to limit the practice of the invention to those descriptions. It will be apparent to those skilled in the art that various substitutions and modifications can be made to the described embodiments without departing from the spirit of the invention, and such substitutions and modifications are to be considered as within the scope of the invention.
Claims (5)
1. The utility model provides an environmental protection fire-retardant gluing agent for plywood which characterized in that: the composite material comprises the following raw materials in parts by weight: 70-100 parts of urea-formaldehyde resin, 10-25 parts of montmorillonite powder, 3-8 parts of magnesium hydroxide, 1-3 parts of phosphate, 0.5-1.5 parts of POSS (polyhedral oligomeric silsesquioxane), 5-10 parts of polyacrylamide, 10-20 parts of redispersible latex powder and 0.5-2 parts of silane coupling agent.
2. The environment-friendly flame-retardant adhesive for the plywood as claimed in claim 1, wherein: the POSS comprises one or more of poly (aminopropyl methyl silsesquioxane), dimethyl siloxane cage polysilsesquioxane and tetramethyl ammonium cage polysilsesquioxane.
3. The environment-friendly flame-retardant adhesive for the plywood as claimed in claim 1, wherein: the redispersible latex powder is one or more of vinyl acetate and ethylene copolymer rubber powder, acrylate and styrene copolymer rubber powder and ethylene, vinyl chloride and vinyl monthly silicate ternary copolymer rubber powder.
4. The environment-friendly flame-retardant adhesive for the plywood as claimed in claim 1, wherein: the silane coupling agent is one or a combination of KH550, KH560, KH570 and KBM 803.
5. The method for preparing the environment-friendly flame-retardant adhesive for plywood as claimed in any one of claims 1 to 4, wherein the method comprises the following steps: the method comprises the following steps: adding POSS and a coupling agent into montmorillonite powder and magnesium hydroxide, adding water, and stirring to form a viscous mixture; and adding phosphate, polyacrylamide, redispersible latex powder and urea-formaldehyde resin into the viscous mixture, stirring and mixing uniformly, and packaging to obtain the environment-friendly flame-retardant adhesive for the plywood.
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| CN202011485885.0A CN112680152A (en) | 2020-12-16 | 2020-12-16 | Environment-friendly flame-retardant adhesive for plywood and preparation method thereof |
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| CN202011485885.0A CN112680152A (en) | 2020-12-16 | 2020-12-16 | Environment-friendly flame-retardant adhesive for plywood and preparation method thereof |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102504737A (en) * | 2011-09-30 | 2012-06-20 | 杭州市萧山区党山新世纪装饰卫浴研发中心 | Environment-friendly flame-retardant adhesive for composite door coating |
| CN103450832A (en) * | 2013-08-14 | 2013-12-18 | 广西南宁绿园北林木业有限公司 | Modified urea-formaldehyde resin adhesive and production method thereof |
| CN104263297A (en) * | 2014-08-27 | 2015-01-07 | 南京市荣达树脂有限公司 | Modified urea-formaldehyde resin adhesive and preparation method thereof |
| CN104449503A (en) * | 2014-12-03 | 2015-03-25 | 绿洲森工股份有限公司 | Low-formaldehyde wood adhesive and preparation method thereof |
| CN105666617A (en) * | 2016-04-08 | 2016-06-15 | 中国林业科学研究院木材工业研究所 | Flame-retardant adhesive, flame-retardant material and preparation method and application of flame-retardant material |
| CN108913042A (en) * | 2018-06-08 | 2018-11-30 | 阜南县永盛工艺品有限公司 | A kind of urea-formaldehyde resin adhesive of rattan material shelf-stable |
-
2020
- 2020-12-16 CN CN202011485885.0A patent/CN112680152A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102504737A (en) * | 2011-09-30 | 2012-06-20 | 杭州市萧山区党山新世纪装饰卫浴研发中心 | Environment-friendly flame-retardant adhesive for composite door coating |
| CN103450832A (en) * | 2013-08-14 | 2013-12-18 | 广西南宁绿园北林木业有限公司 | Modified urea-formaldehyde resin adhesive and production method thereof |
| CN104263297A (en) * | 2014-08-27 | 2015-01-07 | 南京市荣达树脂有限公司 | Modified urea-formaldehyde resin adhesive and preparation method thereof |
| CN104449503A (en) * | 2014-12-03 | 2015-03-25 | 绿洲森工股份有限公司 | Low-formaldehyde wood adhesive and preparation method thereof |
| CN105666617A (en) * | 2016-04-08 | 2016-06-15 | 中国林业科学研究院木材工业研究所 | Flame-retardant adhesive, flame-retardant material and preparation method and application of flame-retardant material |
| CN108913042A (en) * | 2018-06-08 | 2018-11-30 | 阜南县永盛工艺品有限公司 | A kind of urea-formaldehyde resin adhesive of rattan material shelf-stable |
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Application publication date: 20210420 |