Study on Synthetic Process of Low Toxic Urea-Formaldehyde Resin

Abstract:

This study aimed at exploring a producing method of urea-formaldehyde resin that contained low free formaldehyde. Effects of the pH value of addition stage, the pH value and the temperature of polycondensation stage on the properties of the resin were analyzed. The experimental results showed that controlling the pH value of addition stage to 7.5-8.0, regulating the pH value of polycondensation stage to 4.8-5.1, and keeping the temperature of polycondensation stage to 88-92°C, a low toxic urea-formaldehyde resin adhesive was obtained which contained free formaldehyde 0.08%. Using this resin adhesive, the bonding strength of the plywood reached 1.7MPa, formaldehyde emission of the plywood was 0.7mg/l, reaching the grade E1.

• Periodical: Advanced Materials Research (Volume 621)
• Pages: 79-82
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.621.79
• Online since: December 2012
• Authors: Gui Hua Chen, Jian Han, Xiao Huan Zhang
• Keywords: Free Formaldehyde, Synthesis, Urea-Formaldehyde Resin

References

[1] Kuang Yi, Research progress of traditional wood adhesives, Chinese Journal of Colloid&polymer, 26(2008)36-38.

[2] Ji Jia, Wood adhesive production technology, Chemical Industry Press, Beijing, (2006).

[3] Zhang Xiaohuan, Chen Guihua, Han Jian, Study on synthesis of the low free formaldehyde urea-formaldehyde resin adhesive, Wood Processing Machinery, (2)( 2010)20-22.

[4] Pizzi A. High performance MUF resins of low melamine content by a number of novel techniques. Wood Adhesives , 44 (2001) 219-239.

[5] Luo Ye, Zhu Peng-fei etl. Study on low free formaldehyde urea-formaldehyde resin adhesive. China Adhesives, 44(2001)219 -239.