Glass transition temperature ： https://zh.wikipedia.org/zh-cn

The glass transition temperature (TG) is the critical temperature at which a polymer transitions between the high elastic state and the glassy state.

Cross-linking density: https://baike.baidu.com/

Refers to the number of crosslinking bonds within the crosslinked polymer.

The greater the density, the higher the degree of cross-linking and the denser the coating.

Coverage：

The amount of paint required to ensure that the colored paint evenly covers the surface of the object and completely obscures the underlying color

Flash point:

The lowest temperature at which a mixture of sample vapor and air will flash ignite upon contact with fire under specified conditions. https://www.lekamaterial.com/