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Melamine formaldehyde resin and synthesis technology thereof

A technology of melamine and formaldehyde resin, applied in the field of melamine formaldehyde resin and its synthesis process, can solve the problems of difficulty in use, easy cracking of the adhesive layer, poor resin stability, etc., and achieves the effect of low brittleness and good stability

Inactive Publication Date: 2013-06-26
HUNAN FUXIANG WOOD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of melamine resin glue is that the cured glue layer is brittle and easy to break, which affects the quality of the surface of the decorative board; secondly, melamine is relatively active, so the resin stability is poor, making it difficult to use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Take 180g of formaldehyde and put it into the reaction kettle, turn on the mixer, adjust the pH value to 8.5 with sodium hydroxide, add 100g of melamine, raise the temperature to 80°C uniformly within 20min, and keep the pH value at 8.5; keep the temperature at 84°C, when When the turbidity of the reaction solution reaches 29°C, immediately add 10g of p-toluenesulfonamide, and quickly cool down to 60°C, add 1g of propylene glycol, 75g of alcohol and 30g of water, adjust the pH value to 8.5 with sodium hydroxide, cool to 40°C and discharge .

Embodiment 2

[0023] Take 190g of formaldehyde and put it into the reaction kettle, start the mixer, adjust the pH value to 8.7 with sodium hydroxide, add 100g of melamine, raise the temperature to 85°C uniformly within 25min, and keep the pH value at 8.7; keep the temperature at 85°C, when When the turbidity of the reaction solution reaches 31°C, add 12g of p-toluenesulfonamide immediately, and quickly cool down to 62°C, add 1.5g of propylene glycol, 77g of alcohol and 32g of water, adjust the pH value to 8.7 with sodium hydroxide, cool to 42°C and release material.

Embodiment 3

[0025] Take 200g of formaldehyde and put it into the reaction kettle, turn on the mixer, adjust the pH value to 9.0 with sodium hydroxide, add 100g of melamine, raise the temperature to 90°C uniformly within 30min, and keep the pH value at 9.0; keep the temperature at 86°C, when When the turbidity of the reaction solution reaches 32°C, add 15g of p-toluenesulfonamide immediately, and quickly cool down to 65°C, add 2g of propylene glycol, 80g of alcohol and 35g of water, adjust the pH value to 9.0 with sodium hydroxide, cool to 45°C and discharge .

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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 [0001] The invention relates to a melamine formaldehyde resin and a synthesis process thereof. Background technique [0002] Melamine formaldehyde resin glue has greater chemical activity, so it can be cured without adding curing agent and heating. Melamine itself has a high melting point, so the product has good heat resistance. Products made of melamine resin glue have greater hardness, wear resistance, and boiling water resistance than urea-formaldehyde resin glue. In addition, melamine resin glue has better pollution resistance, chemical resistance and electrical insulation properties. The disadvantage of melamine resin glue is that the cured glue layer is brittle and easy to break, which affects the quality of the surface of the decorative board; secondly, melamine is relatively active, so the resin stability is poor, making it difficult to use. Contents of the invention [0003] The purpose of the present invention is to solve the problems existing...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G12/40C08K5/053
Inventor 刘建新陈东辉
Owner HUNAN FUXIANG WOOD
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