申请人:JAPAN SYNTHETIC RUBBER CO., LTD.
公开号:EP0725302A2
公开(公告)日:1996-08-07
A polyamide-type copolymer, a process of producing the same and use of the same in a thin layer forming agent.
In order to provide a polyamide-type copolymer suitable for producing an alignment layer in an SBE type display element with high transparency, adhesion, pretilt angle etc, the present invention provides processes of producing a block copolymer type polyamic acid, a polyimide block copolymer, a polyimide-polyamic acid block copolymer and a liquid crystal alignment layer wherein, in separate steps, first and second prepolymers comprising polyamic acid prepolymers or polyamide prepolymers are prepared and subsequently reacted together, and if necessary, imidised.
The invention also provides a thin layer forming agent having a first polyimide-type block and a second polyimide-type block bonded to the first polyimide-type block and having a different structure from the first polyimide type block.
一种聚酰胺型共聚物、其生产工艺以及其在薄层成型剂中的用途。
为了提供一种聚酰胺型共聚物,使其适用于在 SBE 型显示元件中生产具有高透明 度、高附着力和高前倾角等特性的对位层,本发明提供了生产聚酰胺型嵌段共聚物、 聚酰亚胺嵌段共聚物、聚酰亚胺-聚酰胺嵌段共聚物和液晶对位层的工艺,其中,在 不同步骤中,制备了由聚酰胺预聚物或聚酰胺预聚物组成的第一和第二预聚物, 然后将它们反应在一起,必要时进行亚胺化。
本发明还提供了一种薄层形成剂,它具有第一聚酰亚胺型嵌段和与第一聚酰亚胺型嵌段粘合在一起的第二聚酰亚胺型嵌段,其结构与第一聚酰亚胺型嵌段不同。