申请人:SABIC GLOBAL TECHNOLOGIES B.V.
公开号:US11286347B2
公开(公告)日:2022-03-29
A branched polyimide of the formula (I) wherein G is a group having a valence of t, present in an amount of 0.01 to 10 mol %, or 0.05 to 5 mol %, or 0.1 to 4 mol %, or 0.1 to 3 mol %, each of Q, M, D, V, and R are as defined herein, q is 0 or 1, m is 0 or 1, d is 0 or 1, p is 1 or 2, t is 2 to 6, preferably 2 to 4, and each n is independently the same or different, and is 1 to 1,000, provided that the total of all values of n is greater than 4, wherein the branched polyimide has a zero-shear viscosity in a range from 500 to 15,000 Pa·s, a rheology ratio of 1.1 to 5, and a strain hardening ratio of 1 to 6.
一种式(I)的支化聚酰亚胺 其中 G 是价数为 t 的基团,其含量为 0.01 至 10 摩尔 %,或 0.05 至 5 摩尔 %,或 0.1 至 4 摩尔 %,或 0.1至3摩尔%,Q、M、D、V和R各自如本文所定义,q为0或1,m为0或1,d为0或1,p为1或2,t为2至6,优选2至4,n各自独立地相同或不同,且为1至1,000,条件是所有n值的总和大于4,其中支化聚酰亚胺的零剪切粘度范围为500至15,000 Pa-s,流变比为1.1至5,应变硬化率为1至6。