CN110724484A - Preparation method of melamine modified urea-formaldehyde resin adhesive - Google Patents
Preparation method of melamine modified urea-formaldehyde resin adhesive Download PDFInfo
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- CN110724484A CN110724484A CN201911077787.0A CN201911077787A CN110724484A CN 110724484 A CN110724484 A CN 110724484A CN 201911077787 A CN201911077787 A CN 201911077787A CN 110724484 A CN110724484 A CN 110724484A
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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
- C09J161/00—Adhesives based on condensation polymers of aldehydes or ketones; Adhesives based on derivatives of such polymers
- C09J161/20—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen
- C09J161/32—Modified amine-aldehyde condensates
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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
- C08G12/00—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen
- C08G12/02—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes
- C08G12/40—Chemically modified polycondensates
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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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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Adhesives Or Adhesive Processes (AREA)
Abstract
The invention provides a preparation method of melamine modified urea-formaldehyde resin adhesive, and relates to the technical field of modified material preparation. The melamine modified urea-formaldehyde resin adhesive is prepared from the following raw materials in parts by weight: 50-60 parts of formaldehyde, 20-30 parts of urea, 2-3 parts of melamine, 4-5 parts of aniline, 5-6 parts of polyvinyl alcohol, 2-3 parts of mineral powder, 2-4 parts of a stabilizer, 3-4 parts of an antioxidant and 3-5 parts of an emulsifier, wherein the emulsifier is one or more of benzyl dimethyl phenol polyoxyethylene ether, diphenyl ethyl complex phenol polyoxyethylene ether, diglycerol polypropylene glycol ether, sodium diamyl succinate and fatty alcohol polyoxyethylene ether phosphate. By adding a proper amount of additives into the raw materials, the performance of the modified urea-formaldehyde resin adhesive is effectively improved in the preparation process, and simultaneously, the content of free formaldehyde is greatly reduced, so that the modified urea-formaldehyde resin adhesive is beneficial to the health of people and greatly reduces the influence degree on the environment.
Description
Technical Field
The invention relates to the technical field of modified material preparation, in particular to a preparation method of melamine modified urea-formaldehyde resin adhesive.
Background
Urea-formaldehyde resin, also called urea-formaldehyde resin, is a urea-formaldehyde resin which is obtained by polycondensation of urea and formaldehyde under the action of catalyst (alkaline or acid catalyst) to obtain initial urea-formaldehyde resin, then under the action of solidifying agent or adjuvant to obtain insoluble and infusible final-stage thermosetting resin, the solidified urea-formaldehyde resin is lighter in colour than phenolic resin, semi-transparent, resistant to weak acid and weak base, good in insulating property, excellent in wear resistance and low in cost, and the urea-formaldehyde resin adhesive is the most useful kind of adhesive, especially in the production of various artificial boards in wood processing industry, the urea-formaldehyde resin and its modified product are about 90% of total dosage of adhesive.
Because traditional urea-formaldehyde resin has that the shrink is big, the fragility is big, not water-fast, easy ageing scheduling problem, consequently need modify the processing to it when preparing urea-formaldehyde resin glue among the prior art, handle urea-formaldehyde resin glue through melamine for modified urea-formaldehyde resin glue performance promotes greatly, and although melamine can reduce free formaldehyde's content to a certain extent simultaneously, still contain more free formaldehyde in the modified urea-formaldehyde resin glue that makes, all has certain influence to healthy and environment.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a preparation method of melamine modified urea-formaldehyde resin adhesive, which solves the problem that the prepared modified urea-formaldehyde resin adhesive still contains more free formaldehyde and has certain influence on the health and the environment although melamine can reduce the content of the free formaldehyde to a certain extent.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme: the preparation method of the melamine modified urea-formaldehyde resin adhesive comprises the following raw materials in parts by weight: 50-60 parts of formaldehyde, 20-30 parts of urea, 2-3 parts of melamine, 4-5 parts of aniline, 5-6 parts of polyvinyl alcohol, 2-3 parts of mineral powder, 2-4 parts of a stabilizer, 3-4 parts of an antioxidant and 3-5 parts of an emulsifier.
Preferably, the emulsifier is one or more of benzyl dimethyl phenol polyoxyethylene ether, diphenyl ethyl complex phenol polyoxyethylene ether, diglycerol polypropylene glycol ether, sodium diamyl succinate and fatty alcohol-polyoxyethylene ether phosphate.
Preferably, the melamine modified urea-formaldehyde resin adhesive is prepared from the following raw materials in parts by weight: 50 parts of formaldehyde, 20 parts of urea, 2 parts of melamine, 4 parts of aniline, 5 parts of polyvinyl alcohol, 2 parts of mineral powder, 2 parts of a stabilizer, 3 parts of an antioxidant and 3 parts of an emulsifier.
Preferably, the melamine modified urea-formaldehyde resin adhesive is prepared from the following raw materials in parts by weight: 55 parts of formaldehyde, 25 parts of urea, 2.5 parts of melamine, 4.5 parts of aniline, 5.5 parts of polyvinyl alcohol, 2.5 parts of mineral powder, 3 parts of a stabilizer, 3.5 parts of an antioxidant and 4 parts of an emulsifier.
Preferably, the melamine modified urea-formaldehyde resin adhesive is prepared from the following raw materials in parts by weight: 60 parts of formaldehyde, 30 parts of urea, 3 parts of melamine, 5 parts of aniline, 6 parts of polyvinyl alcohol, 3 parts of mineral powder, 4 parts of a stabilizer, 4 parts of an antioxidant and 5 parts of an emulsifier.
Preferably, the melamine modified urea-formaldehyde resin adhesive comprises the following preparation steps:
1) preparing a steam heating device, a water cooling device and a reaction kettle;
2) weighing formaldehyde, urea, melamine, aniline, polyvinyl alcohol, mineral powder, a stabilizer, an antioxidant and an emulsifier according to a ratio;
3) preparing a hydrochloric acid solution, a caustic soda solution and a formaldehyde diluent, putting the prepared formaldehyde diluent into a reaction kettle, heating the reaction kettle to 35-40 ℃, simultaneously adding a caustic soda solution with the mass concentration of 30-40% to adjust the pH value in the reaction kettle to 8-9, then adding urea and melamine, wherein the adding amount of the urea is 40% of the total amount, then heating the reaction kettle to 60-80 ℃, and stirring for 15-20 min;
4) adding urea, aniline, mineral powder and a stabilizer into a reaction kettle, wherein the adding amount of the urea is 40% of the total amount, simultaneously adding hydrochloric acid solution with the mass concentration of 15-20% to adjust the pH value in the reaction kettle to 6-7, heating the reaction kettle to 80-90 ℃, stirring for 10-15min, and preserving heat for 1 hour;
5) cooling the reaction kettle by water, adding the rest urea, antioxidant and emulsifier into the reaction kettle when the temperature of the reaction kettle is reduced to 60-70 ℃, adding 30-40% by mass of caustic soda solution to adjust the pH value in the reaction kettle to 7.1-7.4, heating the reaction kettle to 75-85 ℃, and preserving the temperature for 5-10 min;
6) and cooling the reaction kettle to 30-40 ℃, then adjusting the pH value in the reaction kettle to 8-8.5, stirring for 5-10min, and discharging to obtain the melamine modified urea-formaldehyde resin adhesive.
(III) advantageous effects
The invention provides a preparation method of melamine modified urea-formaldehyde resin adhesive. The method has the following beneficial effects:
according to the preparation method of the melamine modified urea-formaldehyde resin adhesive, a proper amount of additive is added into the preparation raw materials, so that the performance of the modified urea-formaldehyde resin adhesive is effectively improved in the preparation process, the content of free formaldehyde is greatly reduced, the physical health of people is benefited, and the influence degree on the environment is greatly reduced.
Detailed Description
The following will clearly and completely describe the technical solutions in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the 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 first embodiment is as follows:
the embodiment of the invention provides a preparation method of melamine modified urea-formaldehyde resin adhesive, which comprises the following raw materials in parts by weight: 50 parts of formaldehyde, 20 parts of urea, 2 parts of melamine, 4 parts of aniline, 5 parts of polyvinyl alcohol, 2 parts of mineral powder, 2 parts of a stabilizer, 3 parts of an antioxidant and 3 parts of an emulsifier.
Wherein the emulsifier is one or more of benzyl dimethyl phenol polyoxyethylene ether, diphenyl ethyl complex phenol polyoxyethylene ether, diglycerol polypropylene glycol ether, sodium diamyl succinate and fatty alcohol polyoxyethylene ether phosphate.
The melamine modified urea-formaldehyde resin adhesive comprises the following preparation steps:
1) preparing a steam heating device, a water cooling device and a reaction kettle;
2) weighing formaldehyde, urea, melamine, aniline, polyvinyl alcohol, mineral powder, a stabilizer, an antioxidant and an emulsifier according to a ratio;
3) preparing a hydrochloric acid solution, a caustic soda solution and a formaldehyde diluent, putting the prepared formaldehyde diluent into a reaction kettle, heating the reaction kettle to 35-40 ℃, simultaneously adding a caustic soda solution with the mass concentration of 30-40% to adjust the pH value in the reaction kettle to 8-9, then adding urea and melamine, wherein the adding amount of the urea is 40% of the total amount, then heating the reaction kettle to 60-80 ℃, and stirring for 15-20 min;
4) adding urea, aniline, mineral powder and a stabilizer into a reaction kettle, wherein the adding amount of the urea is 40% of the total amount, simultaneously adding hydrochloric acid solution with the mass concentration of 15-20% to adjust the pH value in the reaction kettle to 6-7, heating the reaction kettle to 80-90 ℃, stirring for 10-15min, and preserving heat for 1 hour;
5) cooling the reaction kettle by water, adding the rest urea, antioxidant and emulsifier into the reaction kettle when the temperature of the reaction kettle is reduced to 60-70 ℃, adding 30-40% by mass of caustic soda solution to adjust the pH value in the reaction kettle to 7.1-7.4, heating the reaction kettle to 75-85 ℃, and preserving the temperature for 5-10 min;
6) and cooling the reaction kettle to 30-40 ℃, then adjusting the pH value in the reaction kettle to 8-8.5, stirring for 5-10min, and discharging to obtain the melamine modified urea-formaldehyde resin adhesive.
Example two:
the embodiment of the invention provides a preparation method of melamine modified urea-formaldehyde resin adhesive, which comprises the following raw materials in parts by weight: 55 parts of formaldehyde, 25 parts of urea, 2.5 parts of melamine, 4.5 parts of aniline, 5.5 parts of polyvinyl alcohol, 2.5 parts of mineral powder, 3 parts of a stabilizer, 3.5 parts of an antioxidant and 4 parts of an emulsifier.
Wherein the emulsifier is one or more of benzyl dimethyl phenol polyoxyethylene ether, diphenyl ethyl complex phenol polyoxyethylene ether, diglycerol polypropylene glycol ether, sodium diamyl succinate and fatty alcohol polyoxyethylene ether phosphate.
The melamine modified urea-formaldehyde resin adhesive comprises the following preparation steps:
1) preparing a steam heating device, a water cooling device and a reaction kettle;
2) weighing formaldehyde, urea, melamine, aniline, polyvinyl alcohol, mineral powder, a stabilizer, an antioxidant and an emulsifier according to a ratio;
3) preparing a hydrochloric acid solution, a caustic soda solution and a formaldehyde diluent, putting the prepared formaldehyde diluent into a reaction kettle, heating the reaction kettle to 35-40 ℃, simultaneously adding a caustic soda solution with the mass concentration of 30-40% to adjust the pH value in the reaction kettle to 8-9, then adding urea and melamine, wherein the adding amount of the urea is 40% of the total amount, then heating the reaction kettle to 60-80 ℃, and stirring for 15-20 min;
4) adding urea, aniline, mineral powder and a stabilizer into a reaction kettle, wherein the adding amount of the urea is 40% of the total amount, simultaneously adding hydrochloric acid solution with the mass concentration of 15-20% to adjust the pH value in the reaction kettle to 6-7, heating the reaction kettle to 80-90 ℃, stirring for 10-15min, and preserving heat for 1 hour;
5) cooling the reaction kettle by water, adding the rest urea, antioxidant and emulsifier into the reaction kettle when the temperature of the reaction kettle is reduced to 60-70 ℃, adding 30-40% by mass of caustic soda solution to adjust the pH value in the reaction kettle to 7.1-7.4, heating the reaction kettle to 75-85 ℃, and preserving the temperature for 5-10 min;
6) and cooling the reaction kettle to 30-40 ℃, then adjusting the pH value in the reaction kettle to 8-8.5, stirring for 5-10min, and discharging to obtain the melamine modified urea-formaldehyde resin adhesive.
Example three:
the embodiment of the invention provides a preparation method of melamine modified urea-formaldehyde resin adhesive, which comprises the following raw materials in parts by weight: 60 parts of formaldehyde, 30 parts of urea, 3 parts of melamine, 5 parts of aniline, 6 parts of polyvinyl alcohol, 3 parts of mineral powder, 4 parts of a stabilizer, 4 parts of an antioxidant and 5 parts of an emulsifier.
Wherein the emulsifier is one or more of benzyl dimethyl phenol polyoxyethylene ether, diphenyl ethyl complex phenol polyoxyethylene ether, diglycerol polypropylene glycol ether, sodium diamyl succinate and fatty alcohol polyoxyethylene ether phosphate.
The melamine modified urea-formaldehyde resin adhesive comprises the following preparation steps:
1) preparing a steam heating device, a water cooling device and a reaction kettle;
2) weighing formaldehyde, urea, melamine, aniline, polyvinyl alcohol, mineral powder, a stabilizer, an antioxidant and an emulsifier according to a ratio;
3) preparing a hydrochloric acid solution, a caustic soda solution and a formaldehyde diluent, putting the prepared formaldehyde diluent into a reaction kettle, heating the reaction kettle to 35-40 ℃, simultaneously adding a caustic soda solution with the mass concentration of 30-40% to adjust the pH value in the reaction kettle to 8-9, then adding urea and melamine, wherein the adding amount of the urea is 40% of the total amount, then heating the reaction kettle to 60-80 ℃, and stirring for 15-20 min;
4) adding urea, aniline, mineral powder and a stabilizer into a reaction kettle, wherein the adding amount of the urea is 40% of the total amount, simultaneously adding hydrochloric acid solution with the mass concentration of 15-20% to adjust the pH value in the reaction kettle to 6-7, heating the reaction kettle to 80-90 ℃, stirring for 10-15min, and preserving heat for 1 hour;
5) cooling the reaction kettle by water, adding the rest urea, antioxidant and emulsifier into the reaction kettle when the temperature of the reaction kettle is reduced to 60-70 ℃, adding 30-40% by mass of caustic soda solution to adjust the pH value in the reaction kettle to 7.1-7.4, heating the reaction kettle to 75-85 ℃, and preserving the temperature for 5-10 min;
6) and cooling the reaction kettle to 30-40 ℃, then adjusting the pH value in the reaction kettle to 8-8.5, stirring for 5-10min, and discharging to obtain the melamine modified urea-formaldehyde resin adhesive.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. A preparation method of melamine modified urea-formaldehyde resin adhesive is characterized by comprising the following steps: the melamine modified urea-formaldehyde resin adhesive is prepared from the following raw materials in parts by weight: 50-60 parts of formaldehyde, 20-30 parts of urea, 2-3 parts of melamine, 4-5 parts of aniline, 5-6 parts of polyvinyl alcohol, 2-3 parts of mineral powder, 2-4 parts of a stabilizer, 3-4 parts of an antioxidant and 3-5 parts of an emulsifier.
2. The method for preparing melamine modified urea-formaldehyde resin adhesive according to claim 1, characterized in that: the emulsifier is one or more of benzyl dimethyl phenol polyoxyethylene ether, diphenyl ethyl complex phenol polyoxyethylene ether, diglycerol polypropylene glycol ether, sodium diamyl succinate and fatty alcohol-polyoxyethylene ether phosphate.
3. The method for preparing melamine modified urea-formaldehyde resin adhesive according to claim 1, characterized in that: the melamine modified urea-formaldehyde resin adhesive is prepared from the following raw materials in parts by weight: 50 parts of formaldehyde, 20 parts of urea, 2 parts of melamine, 4 parts of aniline, 5 parts of polyvinyl alcohol, 2 parts of mineral powder, 2 parts of a stabilizer, 3 parts of an antioxidant and 3 parts of an emulsifier.
4. The method for preparing melamine modified urea-formaldehyde resin adhesive according to claim 1, characterized in that: the melamine modified urea-formaldehyde resin adhesive is prepared from the following raw materials in parts by weight: 55 parts of formaldehyde, 25 parts of urea, 2.5 parts of melamine, 4.5 parts of aniline, 5.5 parts of polyvinyl alcohol, 2.5 parts of mineral powder, 3 parts of a stabilizer, 3.5 parts of an antioxidant and 4 parts of an emulsifier.
5. The method for preparing melamine modified urea-formaldehyde resin adhesive according to claim 1, characterized in that: the melamine modified urea-formaldehyde resin adhesive is prepared from the following raw materials in parts by weight: 60 parts of formaldehyde, 30 parts of urea, 3 parts of melamine, 5 parts of aniline, 6 parts of polyvinyl alcohol, 3 parts of mineral powder, 4 parts of a stabilizer, 4 parts of an antioxidant and 5 parts of an emulsifier.
6. The method for preparing melamine modified urea formaldehyde resin adhesive according to any one of claims 1 to 4, wherein: the preparation method comprises the following preparation steps:
1) preparing a steam heating device, a water cooling device and a reaction kettle;
2) weighing formaldehyde, urea, melamine, aniline, polyvinyl alcohol, mineral powder, a stabilizer, an antioxidant and an emulsifier according to a ratio;
3) preparing a hydrochloric acid solution, a caustic soda solution and a formaldehyde diluent, putting the prepared formaldehyde diluent into a reaction kettle, heating the reaction kettle to 35-40 ℃, simultaneously adding a caustic soda solution with the mass concentration of 30-40% to adjust the pH value in the reaction kettle to 8-9, then adding urea and melamine, wherein the adding amount of the urea is 40% of the total amount, then heating the reaction kettle to 60-80 ℃, and stirring for 15-20 min;
4) adding urea, aniline, mineral powder and a stabilizer into a reaction kettle, wherein the adding amount of the urea is 40% of the total amount, simultaneously adding hydrochloric acid solution with the mass concentration of 15-20% to adjust the pH value in the reaction kettle to 6-7, heating the reaction kettle to 80-90 ℃, stirring for 10-15min, and preserving heat for 1 hour;
5) cooling the reaction kettle by water, adding the rest urea, antioxidant and emulsifier into the reaction kettle when the temperature of the reaction kettle is reduced to 60-70 ℃, adding 30-40% by mass of caustic soda solution to adjust the pH value in the reaction kettle to 7.1-7.4, heating the reaction kettle to 75-85 ℃, and preserving the temperature for 5-10 min;
6) and cooling the reaction kettle to 30-40 ℃, then adjusting the pH value in the reaction kettle to 8-8.5, stirring for 5-10min, and discharging to obtain the melamine modified urea-formaldehyde resin adhesive.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911077787.0A CN110724484A (en) | 2019-11-06 | 2019-11-06 | Preparation method of melamine modified urea-formaldehyde resin adhesive |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911077787.0A CN110724484A (en) | 2019-11-06 | 2019-11-06 | Preparation method of melamine modified urea-formaldehyde resin adhesive |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114108365A (en) * | 2021-12-06 | 2022-03-01 | 东莞市高益装饰材料有限公司 | Melamine softening coated paper and production process thereof |
| CN117138592A (en) * | 2023-06-30 | 2023-12-01 | 广东摩多未来科技有限公司 | Preparation method of modified amino resin dehumidifying film, dehumidifying film and application thereof |
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| CN103361014A (en) * | 2013-07-25 | 2013-10-23 | 南京市荣达树脂有限公司 | Preparation method of modified urea-formaldehyde resin |
| CN104559875A (en) * | 2013-10-10 | 2015-04-29 | 江苏肯帝亚木业有限公司 | Melamine modified urea-formaldehyde resin adhesive and preparation method thereof |
| CN108977141A (en) * | 2018-08-03 | 2018-12-11 | 湖州奇士堂工业设计有限公司 | A kind of wood-based plate thin slice bonding impregnation preparation method of adhesive |
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2019
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| CN103361014A (en) * | 2013-07-25 | 2013-10-23 | 南京市荣达树脂有限公司 | Preparation method of modified urea-formaldehyde resin |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114108365A (en) * | 2021-12-06 | 2022-03-01 | 东莞市高益装饰材料有限公司 | Melamine softening coated paper and production process thereof |
| CN117138592A (en) * | 2023-06-30 | 2023-12-01 | 广东摩多未来科技有限公司 | Preparation method of modified amino resin dehumidifying film, dehumidifying film and application thereof |
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