Zhengzhou Invech Machinery
TEL:86-18103852768

INDUSTRY DYNAMICSPosition

Your current location:Home > INDUSTRY DYNAMICS

Tel:86-18103852768
Urea-formaldehyde Glue for Blocks

Author:2018/8/6 16:49:36    Time:2018/8/6 16:49:36    Popularity:0Tags:urea-formaldehyde glue

It is produced from Urea and formaldehyde.

Materials:

Name                                                      QTY(/g)        

Industrial Formaldehyde (36%)           960

potassium hydroxide(30%)                 some

Urea(Nitrogin content 46.6%)             370

Formic Acid(20%)                               some


Processing:

Put formadehyde into reactor,mixing,and add potassium hydroxide to make PH to 7.5,

heating to 40℃,adding 3/4 urea of total amount,then heat to 90℃ in 50-60mins and keep

20mins. Then adding remining Urea and reacting for 40mins in 90℃. To add formic acid to

make PH in 5.3-5.6 and in 92℃ keep warming 30mins,then heating slowly to 97℃。

When viscosity reaches to requested one,adding potassium hydroxide to make PH at 7.5-8.

Vacuum dewatering,when it reaches to 65% of formaldehyde water and stop dewartering.

Cooling,and add potassium hydroxide to make PH at 7-8 at same time. When temperature

cool to 50℃ and release the glue to tank.


【Title of this article】:Urea-formaldehyde Glue for Blocks,【Site address】:http://www.invech-machinery.com/industrydynamics/144.html

Copyright © 2015-2016 Zhengzhou Invech Machinery CO. Limited  豫ICP备20007134号-1  Technical support:伟置电子  

  • QQ

  • Consulting
  • 点击这里给我发消息
Open
Consulting
Scan

Scan
Concern us

Tel
86-18103852768

Top
×