|
|
Synthesis and Properties of the Unsaturated Polyester
Polyurethane with Lateral Base Double Bonds
Wang Chuanxing, Liu Junkai, Xu Qinhong, Gao Chuanhui, Wu Yumin, Hou Baorong
With itaconic acid (IA) and 1,4
butanediol (BDO) as the raw materials, the resultant hydroxyl
terminated aliphatic unsaturated polyesters (PBI) were prepared. The unsaturated polyurethane was prepared with PBI as the soft segment and toluene diisocynate (T
DI) as the hard segment. The effect of its reaction conditions on the mechanical properties of the unsaturated polyurethane was also investigated. It was found that the film products with the optimum properties were obtained under the material mass ratio o
f TDI and PBI 1
∶
1.5, the reaction temperature 80
℃
, optimum reaction time 2 h, with dibutyltin dilaurate in an amount of 1% as the catalyst. Combining with benzoyl peroxide in an amount of 1%,as an initiator, the film of the unsaturated polyurethane was smooth, transparent and level. The hardness was 6H, and the adhesion property was A
grade.
|
|
