| 초록 |
In order to obtain polyurethane (PU) with low gloss, people employed PU with rough surface roughness by introducing additives such as silica. The matting agents when added to the WPU dispersion tend to disperse imperfectly due to the incompatibility between the additive and WPU dispersion, leading to inhomogeneity of gloss in the surface of substrates. Furthermore, the gloss increases due to disappearance of the agents after a period of time use. Nowadays, single component waterborne PU (WPU) is a trend in field of coating industry. In this research, a series of WPU were synthesized under different conditions (e.g., different contents of polyols and DMPA, etc.) via prepolymer emulsification process. FTIR was used to confirm the chemical structures. The rough surface morphology, particle size distribution, phase separation behavior along with their hardness, adhesion capacities and thermal stabilities were also studied. All the experimental data and results will be presented in detail. |
