CN103172813A - Melamine formaldehyde resin and synthesis technology thereof - Google Patents
Melamine formaldehyde resin and synthesis technology thereof Download PDFInfo
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- CN103172813A CN103172813A CN2013101005239A CN201310100523A CN103172813A CN 103172813 A CN103172813 A CN 103172813A CN 2013101005239 A CN2013101005239 A CN 2013101005239A CN 201310100523 A CN201310100523 A CN 201310100523A CN 103172813 A CN103172813 A CN 103172813A
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- formaldehyde resin
- sodium hydroxide
- melamine
- formaldehyde
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Abstract
The invention discloses a melamine formaldehyde resin and a synthesis technology thereof. The melamine formaldehyde resin comprises the following ingredients: melamine, formaldehyde, para toluene sulfonamide, sodium hydroxide, propylene glycol, alcohol and water. The synthesis technology of the melamine formaldehyde resin comprises the following steps of adding the formaldehyde into a reaction kettle, starting a stirrer, adjusting the pH value by using the sodium hydroxide, adding the melamine into the reaction kettle, uniformly raising the temperature to 80-90 DEG C in 20-30minutes, keeping the pH value at 8.5-9.0, carrying out heat preservation at 84-86 DEG C, when the turbidity degree of the reaction liquid reaches 29-32 DEG, immediately adding the para toluene sulfonamide into the reaction kettle, rapidly reducing the temperature to 60-65 DEG C, adding the propylene glycol, the alcohol and the water into the reaction kettle, regulating the pH value of the resulting solution to 8.5-9.0 by using the sodium hydroxide, cooling the resulting solution to 40-45 DEG C, and discharging the solution. The melamine formaldehyde resin prepared by the method has the characteristics of small brittleness and good stability.
Description
Technical field
The present invention relates to a kind of terpolycyantoamino-formaldehyde resin and synthesis technique thereof.
Background technology
Melamine-formaldehyde resin adhesive has larger chemically reactive, does not therefore add the solidifying agent heating namely curable.The fusing point of trimeric cyanamide own is high, therefore the hot temperature of product is good.The made product of melamine resin adehsive has larger hardness and wear resistance, resistance to boiling water than urea-formaldehyde resin adhesive.In addition, the stain resistance of melamine resin adehsive, chemical proofing and electrical insulation capability are also relatively good.To be that the glue-line after solidifying is crisp easily break the shortcoming of melamine resin adehsive, affects the quality on decorative sheet surface; Secondly, trimeric cyanamide is more active, so stable resin is relatively poor, causes and uses difficulty.
Summary of the invention
The object of the invention is to solve the problem that prior art exists, thereby provide a kind of snappiness good, more stable terpolycyantoamino-formaldehyde resin and synthesis technique thereof.
Technical problem solved by the invention realizes by the following technical solutions: a kind of terpolycyantoamino-formaldehyde resin is characterized in that: it is formed by the preparation of raw material of following weight ratio:
Trimeric cyanamide 100
Formaldehyde 180-200
Para toluene sulfonamide 10-15
Propylene glycol 1-2
Sodium hydroxide 2-2.5
Alcohol 75-80
Water 30-35.
The synthesis technique of terpolycyantoamino-formaldehyde resin of the present invention comprises the following steps:
The first step: formaldehyde is added in reactor, open stirrer, regulate pH value to 8.5-9.0 with sodium hydroxide;
Second step: add trimeric cyanamide, make temperature evenly rise to 80-90 ℃ in 20-30min, and the maintenance pH value is 8.5-9.0;
The 3rd step: temperature remains on 84-86 ℃, when the reaction solution opacity reaches 29-32 ℃, adds immediately para toluene sulfonamide, and is cooled to rapidly 60-65 ℃;
The 4th step: add propylene glycol, alcohol and water, regulating pH value with sodium hydroxide is 8.5-9.0, is cooled to 40-45 ℃ of blowing.
Para toluene sulfonamide can with formaldehyde and trimeric cyanamide hydroxymethyl derivative generation chemical reaction, change the structure of resin, cross-linking density is descended, thereby reduce the fragility of resin, propylene glycol is the extender plasticizer that contains hydroxyl, can improve the stability of resin, reduce its fragility, alcohol and water are as thinner, resin content is reduced, viscosity degradation reduces the collision opportunity between molecule, increases stability.
The melamine resin fragility that the present invention makes is little, good stability.
Embodiment
The invention will be further described according to specific examples for the below:
Embodiment 1
Get formaldehyde 180g and add in reactor, open stirrer, regulate pH value to 8.5 with sodium hydroxide, add trimeric cyanamide 100g, make temperature evenly rise to 80 ℃ in 20min, and the maintenance pH value is 8.5; Temperature remains on 84 ℃, when the reaction solution opacity reaches 29 ℃, adds immediately para toluene sulfonamide 10g, and is cooled to rapidly 60 ℃, adds propylene glycol 1g, alcohol 75g and water 30g, and regulating pH value with sodium hydroxide is 8.5, is cooled to 40 ℃ of blowings.
Embodiment 2
Get formaldehyde 190g and add in reactor, open stirrer, regulate pH value to 8.7 with sodium hydroxide, add trimeric cyanamide 100g, make temperature evenly rise to 85 ℃ in 25min, and the maintenance pH value is 8.7; Temperature remains on 85 ℃, when the reaction solution opacity reaches 31 ℃, adds immediately para toluene sulfonamide 12g, and is cooled to rapidly 62 ℃, adds propylene glycol 1.5g, alcohol 77g and water 32g, and regulating pH value with sodium hydroxide is 8.7, is cooled to 42 ℃ of blowings.
Embodiment 3
Get formaldehyde 200g and add in reactor, open stirrer, regulate pH value to 9.0 with sodium hydroxide, add trimeric cyanamide 100g, make temperature evenly rise to 90 ℃ in 30min, and the maintenance pH value is 9.0; Temperature remains on 86 ℃, when the reaction solution opacity reaches 32 ℃, adds immediately para toluene sulfonamide 15g, and is cooled to rapidly 65 ℃, adds propylene glycol 2g, alcohol 80g and water 35g, and regulating pH value with sodium hydroxide is 9.0, is cooled to 45 ℃ of blowings.
Above demonstration and described ultimate principle of the present invention and principal character and advantage of the present invention; the technician of the industry should understand; the present invention is not restricted to the described embodiments; that describes in above-described embodiment and specification sheets just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications; these changes and improvements all fall in the claimed scope of the invention, and the claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (2)
1. terpolycyantoamino-formaldehyde resin, it is characterized in that: it is formed by the preparation of raw material of following weight ratio:
Trimeric cyanamide 100
Formaldehyde 180-200
Para toluene sulfonamide 10-15
Sodium hydroxide 2-2.5
Propylene glycol 1-2
Alcohol 75-80
Water 30-35.
2. the synthesis technique of a terpolycyantoamino-formaldehyde resin is characterized in that: comprise the following steps:
The first step: formaldehyde is added in reactor with ultrasonic vibration installation, open stirrer, regulate pH value to 8.5-9.0 with sodium hydroxide;
Second step: add trimeric cyanamide, make temperature evenly rise to 80-90 ℃ in 20-30min, and the maintenance pH value is 8.5-9.0;
The 3rd step: temperature remains on 84-86 ℃, when the reaction solution opacity reaches 29-32 ℃, adds immediately para toluene sulfonamide, starts the ultrasonic vibration device in reactor, stirs 10-15min, is cooled to rapidly 60-65 ℃;
The 4th step: add propylene glycol, alcohol and water, regulating pH value with sodium hydroxide is 8.5-9.0, is cooled to 40-45 ℃ of blowing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101005239A CN103172813A (en) | 2013-03-27 | 2013-03-27 | Melamine formaldehyde resin and synthesis technology thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101005239A CN103172813A (en) | 2013-03-27 | 2013-03-27 | Melamine formaldehyde resin and synthesis technology thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103172813A true CN103172813A (en) | 2013-06-26 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013101005239A Pending CN103172813A (en) | 2013-03-27 | 2013-03-27 | Melamine formaldehyde resin and synthesis technology thereof |
Country Status (1)
| Country | Link |
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| CN (1) | CN103172813A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104119488A (en) * | 2014-07-16 | 2014-10-29 | 南京林业大学 | Method for synthesizing melamine-formaldehyde resin precipitate and application of melamine-formaldehyde resin precipitate as amino resin adhesive improver |
| CN108003310A (en) * | 2017-12-05 | 2018-05-08 | 河南骏化发展股份有限公司 | A kind of preparation method and product of modified melamine-formaldehyde etherified resin |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1916061A (en) * | 2005-08-16 | 2007-02-21 | 北京绿寰宇化工有限公司 | Active plasticization modifier in use for amino resin |
| CN101481445A (en) * | 2009-02-06 | 2009-07-15 | 圣象实业（江苏）有限公司 | Melamine-formaldehyde impregnating resin and preparing method thereof |
-
2013
- 2013-03-27 CN CN2013101005239A patent/CN103172813A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1916061A (en) * | 2005-08-16 | 2007-02-21 | 北京绿寰宇化工有限公司 | Active plasticization modifier in use for amino resin |
| CN101481445A (en) * | 2009-02-06 | 2009-07-15 | 圣象实业（江苏）有限公司 | Melamine-formaldehyde impregnating resin and preparing method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 李和平: "《胶黏剂生产原理与技术》", 31 August 2009, article "三聚氰胺甲醛树脂", pages: 169-170 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104119488A (en) * | 2014-07-16 | 2014-10-29 | 南京林业大学 | Method for synthesizing melamine-formaldehyde resin precipitate and application of melamine-formaldehyde resin precipitate as amino resin adhesive improver |
| CN104119488B (en) * | 2014-07-16 | 2015-11-18 | 南京林业大学 | The synthetic method of terpolycyantoamino-formaldehyde resin precipitation and the application as amine resin tackiness agent modifying agent thereof |
| CN108003310A (en) * | 2017-12-05 | 2018-05-08 | 河南骏化发展股份有限公司 | A kind of preparation method and product of modified melamine-formaldehyde etherified resin |
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Application publication date: 20130626 |