Aromatic polyimides of the formula:
where -Ar- is
-Ar′- is
-Ar˝- is
where -Z, and -Z₁, independently are -Cl, -Br or -I; where -X, -X₁, -X₂ and -X₃ independently are -CH₃ or -C₂H₅; and -Y,-Y₁,-Y₂ and -Y₃ are primary or secondary alkyl groups having 3 to 12 carbon atoms, provided that when m is greater than 0, r is 0 and that when L is greater than 0, r and s are 0, are disclosed. These polyimides are very soluble, even in weak solvents such as toluene.
式中的芳香族聚
酰亚胺:
其中 -Ar- 是
-是
-Ar˝-是
其中 -Z 和 -Z₁ 独立地为 -Cl、-Br 或 -I; 其中 -X、-X₁、-X₂ 和 -X₃ 独立地为 -CH₃ 或 -C₂H₅ ;和-Y、-Y₁、-Y₂和-Y₃是具有 3 至 12 个碳原子的伯或仲烷基,条件是当 m 大于 0 时,r 为 0;当 L 大于 0 时,r 和 s 为 0。这些聚
酰亚胺非常易溶,即使在
甲苯等弱溶剂中也是如此。