申请人:Mitsui Chemicals, Inc.
公开号:EP0931805A1
公开(公告)日:1999-07-28
A triblock oligomer (A) which has a structure represented by the following formula (I) and a weight average molecular weight 100 to 8000 is provided. The triblock oligomer (A) exhibits excellent initial and long term antistatic performance as well as excellent initial and long term antifogging performance. Also provided are a thermoplastic resin composition containing such triblock oligomer (A), and an extruded/molded article wherein ratio of oxygen atom number to carbon atom number on the surface, the average particle diameter of the dispersed particles, ratio of the average particle diameter in the major axis to the average particle diameter in the minor axis, and average distance between gravity center of the dispersed particles are within particular ranges.
A―B―C (I)
(A: R1 - X -;
B: - (R2 - O)m - (R3 - O)n -;
C: ―R4―Y―R5;
R1: alkyl group, alkenyl group, or a homopolymer or a copolymer of an α-olefin;
X: oxygen atom, OC(=O), C(=O)O, OC(=O)O, NHC(=O), or C(=O)NH;
R2, R3: alkylene group; m: integer of 1 to 30;
n: integer of 0 to 29; R4: alkylene group;
Y: oxygen atom, OC(=O), C(=O)O, OC(=O)O, NHC(=O), or C(=O) NH;
R5: hydrogen atom, alkyl group, alkenyl group, aryl group, or a homopolymer or a copolymer of an α-olefin).
本发明提供了一种三嵌段低聚物(A),其结构由下式(I)表示,重量平均分子量为 100 至 8000。三嵌段低聚物(A)具有优异的初始和长期抗静电性能,以及优异的初始和长期防雾性能。此外,还提供了一种含有此类三嵌段低聚物(A)的热塑性树脂组合物,以及一种挤压/模塑制品,其中表面氧原子数与碳原子数之比、分散颗粒的平均颗粒直径、主轴平均颗粒直径与次轴平均颗粒直径之比,以及分散颗粒重心之间的平均距离均在特定范围内。
A-B-C (I)
(A: R1 - X -;
B: - (R2 - O)m - (R3 - O)n -;
C:-R4-Y-R5;
R1:烷基、烯基或 α-烯烃的均聚物或共聚物;
X:氧原子、OC(=O)、C(=O)O、OC(=O)O、NHC(=O)或 C(=O)NH;
R2、R3:亚烷基; m:1 至 30 的整数;
n:0 至 29 的整数; R4:亚烷基;
Y:氧原子、OC(=O)、C(=O)O、OC(=O)O、NHC(=O)或 C(=O) NH;
R5:氢原子、烷基、烯基、芳基或 α-烯烃的均聚物或共聚物)。