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Preparation and Performance of Urea-Formaldehyde Resin Modified with Phenolized Fulvic Acid and Isocyanate
Corresponding Author(s) : Xianglin Zhang
Asian Journal of Chemistry,
Vol. 26 No. 5 (2014): Vol 26 Issue 5
Abstract
Urea-formaldehyde (UF) resins were prepared by using phenolized fulvic acid (PFA) and 4,4'-diphenylmethane diisocyanate (MDI) as modifiers through orthogonal experiment. The influence of the PFA/UF ratio (mass ratio) on free formaldehyde and that of the MDI/UF ratio on bonding strength were investigated. The results showed that the content of free formaldehyde decreased with an increasing PFA/UF ratio and the bonding strength increased with an increasing MDI/UF ratio. When the mass ratio of PFA:MDI:UF was 0.006:0.035:1, the free formaldehyde content was dropped to 0.0924 %, the bonding strength could be achieved at 1.08 MPa and the thermal stability was also improved accordingly.
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- C.W. Bayer and M.S. Black, Exp. Pathol., 37, 147 (1989); doi:10.1016/S0232-1513(89)80035-0.
- M. Dunky, Int. J. Adhes. Adhes., 18, 95 (1998); doi:10.1016/S0143-7496(97)00054-7.
- I. Andersen, G.R. Lundqvist and L. Mølhave, Atmos. Environ., 9, 1121 (1975); doi:10.1016/0004-6981(75)90188-2.
- M. David, Regul. Toxicol. Pharmacol., 4, 355 (1983).
- A.P. Jones, Atmos. Environ., 33, 4535 (1999); doi:10.1016/S1352-2310(99)00272-1.
- Z. Que, T. Furuno, S. Katoh and Y. Nishino, Build. Environ., 42, 1257 (2007); doi:10.1016/j.buildenv.2005.11.028.
- Z. Que, T. Furuno, S. Katoh and Y. Nishino, Build. Environ., 42, 1242 (2007); doi:10.1016/j.buildenv.2005.11.026.
- A. Pizzi, L. Lipschitz and J. Valenzuela, Holzforschung, 48, 254 (1994); doi:10.1515/hfsg.1994.48.3.254.
- G.E. Myers, Forest Prod. J., 5, 35 (1984).
References
C.W. Bayer and M.S. Black, Exp. Pathol., 37, 147 (1989); doi:10.1016/S0232-1513(89)80035-0.
M. Dunky, Int. J. Adhes. Adhes., 18, 95 (1998); doi:10.1016/S0143-7496(97)00054-7.
I. Andersen, G.R. Lundqvist and L. Mølhave, Atmos. Environ., 9, 1121 (1975); doi:10.1016/0004-6981(75)90188-2.
M. David, Regul. Toxicol. Pharmacol., 4, 355 (1983).
A.P. Jones, Atmos. Environ., 33, 4535 (1999); doi:10.1016/S1352-2310(99)00272-1.
Z. Que, T. Furuno, S. Katoh and Y. Nishino, Build. Environ., 42, 1257 (2007); doi:10.1016/j.buildenv.2005.11.028.
Z. Que, T. Furuno, S. Katoh and Y. Nishino, Build. Environ., 42, 1242 (2007); doi:10.1016/j.buildenv.2005.11.026.
A. Pizzi, L. Lipschitz and J. Valenzuela, Holzforschung, 48, 254 (1994); doi:10.1515/hfsg.1994.48.3.254.
G.E. Myers, Forest Prod. J., 5, 35 (1984).