Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of production technology of methyl etherified urea-formaldehyde resin

A production process and technology of urea-formaldehyde resin, applied in the field of production technology of methyl etherified urea-formaldehyde resin, can solve problems such as short shelf life and poor resin stability, and achieve the effects of low production cost, good stability and long shelf life

Active Publication Date: 2016-08-17
JIAXING HANGXING FINE CHEM
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at defects such as poor resin stability and short shelf life in the prior art, the purpose of the present invention is to provide a water-soluble methyl etherified urea-formaldehyde resin with good stability, long shelf life, simple production process and low production cost. craft

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A kind of production technique of methyl etherified urea-formaldehyde resin, described production technique mainly comprises the following steps:

[0029] (1) Put a quantitative amount of formaldehyde solution in the reactor, add an appropriate amount of alkali, and adjust the pH value in the reactor to 8.5-9.5;

[0030] (2) drop into quantitative solid granular urea in the reactor of above-mentioned steps 1;

[0031] (3) Heat the reaction kettle in the above step 2, stop heating after the temperature rises to 78°C, and keep it warm for 60 minutes; then cool the material in the reaction kettle to about 75°C;

[0032] (4) Pour a quantitative amount of methanol solution into the reaction kettle of the above step 3, add an appropriate amount of acid, and adjust the pH value of the material in the reaction kettle to 1.5 to 3.0;

[0033] (5) Heating the materials in the reaction kettle in step 4 above, stopping heating after the temperature rises to 88°C, and keeping the te...

Embodiment 2

[0042] A kind of production technique of methyl etherified urea-formaldehyde resin, described production technique mainly comprises the following steps:

[0043] (1) Put a quantitative amount of formaldehyde solution in the reactor, add an appropriate amount of alkali, and adjust the pH value in the reactor to 8.5-9.5;

[0044] (2) drop into quantitative solid granular urea in the reactor of above-mentioned steps 1;

[0045] (3) Heat the reaction kettle in the above step 2, stop heating after the temperature rises to 80°C, and keep it warm for 50 minutes; then cool the material in the reaction kettle to about 75°C;

[0046] (4) Pour a quantitative amount of methanol solution into the reaction kettle of the above step 3, add an appropriate amount of acid, and adjust the pH value of the material in the reaction kettle to 1.5 to 3.0;

[0047] (5) Heating the material in the reaction kettle of step 4 above, stopping heating after the temperature rises to 90°C, and keeping the tem...

Embodiment 3

[0056] A kind of production technique of methyl etherified urea-formaldehyde resin, described production technique mainly comprises the following steps:

[0057] (1) Put a quantitative amount of formaldehyde solution in the reactor, add an appropriate amount of alkali, and adjust the pH value in the reactor to 8.5-9.5;

[0058] (2) drop into quantitative solid granular urea in the reactor of above-mentioned steps 1;

[0059] (3) Heat the reaction kettle in the above step 2, stop heating after the temperature rises to 85°C, and keep it warm for 30 minutes; then cool the material in the reaction kettle to about 75°C;

[0060] (4) Pour a quantitative amount of methanol solution into the reaction kettle of the above step 3, add an appropriate amount of acid, and adjust the pH value of the material in the reaction kettle to 1.5 to 3.0;

[0061] (5) Heating the material in the reaction kettle of step 4 above, stopping heating after the temperature rises to 95°C, and keeping the tempe...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a production process of a methyletherified urea formaldehyde resin. The methyletherified urea formaldehyde resin good in stability and long in guarantee period is prepared from such raw materials as urea, formaldehyde and methanol; in the production process, the molar ratio of the raw materials urea, formaldehyde and methanol is 1: (1.5-2.5): (1.0-2.0); finally, vacuum concentration is performed under a vacuum degree within the range of -0.085 to -0.095MPa, and the product methyletherified urea formaldehyde resin having the viscosity within the range of 600-1000mp.s / 30 DEG C can be obtained. The production process is simple in steps and low in production cost; the prepared resin is good in resin stability and the guarantee period of the resin can be 6 months.

Description

technical field [0001] The invention relates to the field of chemical material synthesis, in particular to a production process of methyl etherified urea-formaldehyde resin. Background technique [0002] Urea-formaldehyde resin has the following characteristics: low price, sufficient sources; molecular structure contains polar oxygen atoms, good adhesion with substrate, can be used for primers, and can also be used for intermediate coatings; it can be cured at room temperature when catalyzed by acid, Therefore, it can be used in two-component wood coatings; the coating film cured with urea-formaldehyde resin improves color retention, has higher hardness and better flexibility, but has a certain impact on gloss retention; it has a clearer color when used in hammer paint pattern. However, due to the high viscosity of the urea-formaldehyde resin solution, the storage stability is poor. [0003] The urea-formaldehyde resin etherified with methanol is still soluble in water. It...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C08G12/42
Inventor 蒋红卫
Owner JIAXING HANGXING FINE CHEM