| 1 | Macromolecule polymers: urea-formaldehyde resin, PVC. | |
| 2 | The catalysts and process conditions for the synthesis of urea- formaldehyde resin were studied. | |
| 3 | In this paper, p-methylphenyl sulphonylamine was used to modify urea formaldehyde resin with low molar ratio. | |
| 4 | This paper introduces a new method for the synthesis of UF adhesives . | |
| 5 | Chinese fir; modified UF resin; micron wood flake; lightweight artificial board. |