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A kind of production technology of ultra-low free formaldehyde amino resin

A formaldehyde amino and production technology technology, which is applied in the production technology field of ultra-low free formaldehyde amino resin, and can solve the problems of low etherification degree and the like

Active Publication Date: 2017-12-08
JIAXING HANGXING FINE CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, the water-soluble methyl etherified amino resin used commercially has a low degree of etherification, and the free formaldehyde of the resin is ≥0.5%. It is difficult to make the residual free formaldehyde of the fabric using the water-soluble methyl etherified amino resin reach below 75ppm

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0017] Embodiment: a kind of production process of ultra-low free formaldehyde amino resin comprises the following steps: (1) put liquid methanol into the reactor, add an appropriate amount of liquid caustic soda; (2) put solid powdered paraformaldehyde, melamine and urea Put into the reaction kettle; (3) steam heating the reaction kettle, and stop the steam heating after the temperature rises to 70 ℃ to 80 ℃; (4) after keeping the temperature for 60 minutes, open the cooling water to cool the material in the kettle to 65-66 ℃, and use nitric acid Adjust the pH value of the material solution in the reaction kettle; (5) The reaction time is 30 minutes, and liquid caustic soda is added as soon as the time is up; (6) Concentrate by vacuuming.

[0018] In step (1), the liquid methanol is added into the measuring barrel through the stainless steel pipe by the pump, and then the liquid methanol is poured into the reaction kettle from the measuring barrel.

[0019] In step (1), an ap...

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PUM

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Abstract

The invention discloses a production process of an ultra-low free formaldehyde amino resin, which comprises the following steps: (1) putting liquid methanol into a reaction kettle, adding an appropriate amount of liquid caustic soda; (2) putting solid powdered paraformaldehyde, The melamine and urea are put into the reactor; (3) the reactor is heated with steam, and the steam heating is stopped after the temperature rises to 70 ℃ to 80 ℃; (4) after the temperature is kept for 60 minutes, the cooling water is turned on to cool the material in the reactor to 65-66 ℃ , adjust the pH value of the material solution in the reaction kettle with nitric acid; (5) the reaction time is 30 minutes, and liquid caustic soda is added when the time is up; (6) vacuum concentration. The invention provides a new production process which can make resin free formaldehyde≤0.5%, and the free formaldehyde residual content of fabrics using the water-soluble methyl etherified amino resin reaches below 75ppm.

Description

Technical field: [0001] The invention relates to the technical field of formaldehyde amino resin, and more particularly to a production process of ultra-low free formaldehyde amino resin. Background technique: [0002] Amino resin is a general term for resins formed by polycondensation of amino-containing compounds and formaldehyde. Generally, it can be made into aqueous solution or ethanol solution, and can also be dried into powder solid. Most of them are hard and brittle, and need to be filled with fillers when used. [0003] Amino resin for coatings is a multifunctional compound, which is added and condensed with a compound containing (-NH2) functional group and aldehydes (mainly formaldehyde), and then the resulting methylol (-CH20H) and aliphatic monohydric alcohol partial ethers The resulting product is obtained by oxidizing or fully etherifying the two. According to the different amino compounds used, it can be divided into four categories: urea-formaldehyde resin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G12/38
Inventor 蒋红卫
Owner JIAXING HANGXING FINE CHEM