Abstract:

In this paper， the titanium dioxide for color masterbatch was studied， and their conventional properties， resin system， temperature and weather resistance were investigated with the type and amount of coating agent as variables. Moreover， the relevant mechanisms were analyzed. The results indicated that the whiteness and oil absorption of trimethylol propane（TMP） decreased with an increase of coating agent content， whereas the volatile matter increased. The maximum whiteness of TMP coating reached 97.64， which was better than those of the other samples. In the PP resin system， the b* value decreased. The performance of TMP was better than the other three systems in the temperature resistant system， and it was also better than that of the standard sample at the coating content lower than 0.5 %. In the weathering system， the samples containing the TMP dosage of 0.5 and 0.7 wt % were better than the standard one. These results may be attributed to the fact that TMP has more functional groups， and therefore it can better wrap on the surface of titanium dioxide.

Key words: masterbatch, titanium dioxide, organic coating agent, weatherability, resin system