The present invention provides a process for preparing polyimides. The process includes cyclizing a polyimide precursor composition in a vacuum-like environment by using infrared radiation to give polyimide. The process can effectively reduce the cyclization temperature and time, thereby reducing energy and process costs.
The present invention provides a polyimide precursor composition comprising an amic acid ester oligomer of Formula (1):
and
a diamine of Formula (2) or (3):
wherein G, P, R, Rx, P′, D, E and m are as defined herein.
The present invention also provides a dry film containing the polyimide precursor composition, as well as a polyimide film and polyimide laminate prepared from the composition.
The present invention provides an amic acid ester oligomer having a structure of Formula (1) or (1′):
wherein G, P, R, Rx, D, E and m are those as defined in the specification. The present invention also provides a polyimide precursor composition or a photosensitive polyimide precursor composition comprising the amic acid ester oligomer, as well as a polyimide prepared from the composition.
本发明提供了一种具有式(1)或(1′)结构的胺基酸酯低聚物:
其中 G、P、R、Rx、D、E 和 m 如说明书中所定义。本发明还提供了一种聚酰亚胺前体组合物或光敏聚酰亚胺前体组合物,该组合物包含胺基酸酯低聚物,以及由该组合物制备的聚酰亚胺。
TAMANO, MICHIKO;NAGAI, YUKIO;KOKETSU, JUGO, NIPPON KAGAKU KAJSI,(1988) N2, S. 1977-1983