、 3,5-二硝基三氟甲苯 、 间硝基苯酚 以in an aprotic solvent, to give 1,3-bis(3-nitrophenoxy)-5-trifluoromethylbenzene, which的产率得到1,3-bis(3-nitrophenoxy)-5-trifluoromethylbenzene
Aromatic diamine and polyimide, and preparation process of same
申请人:Mitsui Toatsu Chemicals, Inc.
公开号:US05410084A1
公开(公告)日:1995-04-25
A polyimide comprising a requisite structural unit having one or more recurring structural units of the formula: ##STR1## such as the structural units of the formula ##STR2## Further, the present invention relates to a novel aromatic diamine which has a perfluoro radical and can be used as a raw material monomer of the polyimide, and a process for preparing the same. The polyimide can have an extremely low dielectric constant and is colorless, transparent and excellent in processability and heat resistance.
A polyimide comprising a requisite structural unit having one or more recurring structural units of the formula: ##STR1## such as the structural units of the formula ##STR2## The polyimide can have an extremely low dielectric constant and is colorless, transparent and excellent in processability and heat resistance, and also provides an aromatic diamine which is useful as a raw material monomer of the polyimide or a raw material of other various engineering plastics.
A low birefringent organic optical component prepared from a resin consisting essentially of one or more repetitive structural units selected from the group consisting of structures represented by general formula (1); ##STR1## wherein A is either of the groups below. ##STR2## The organic optical component can exhibit excellent transparency, heat resistance and mechanical strength as well as a low birefringence. Also provided is a novel aromatic polyamide with a low permitivity and excellent transparency, processability and thermal stability, besides excellent heat resistance inherent in an aromatic polyamide.
Aromatic diamine and polyimde, and preparation process of same
申请人:MITSUI TOATSU CHEMICALS, Inc.
公开号:EP0565352A2
公开(公告)日:1993-10-13
This invention relates to fluorine containing polyimide, a novel aromatic diamine which has a perfluoroalkyl radical and can be used as a raw material monomer of the polyimide, and a process for preparing the same.
The polyimide comprise a requisite structural unit having one or more recurring structural units of the formula :
such as the structural units of the formula
Further, the present invention relates to a novel aromatic diamine which has a perfluoro radical and can be used as a raw material monomer of the polyimide, and a process for preparing the same.
The present invention can provide polyimide which has an extremely low dielectric constant and is colorless, transparent and excellent in processability and heat resistance, and also provides an aromatic diamine which is useful as a raw material monomer of the polyimide or a raw material of other various engineering plastics.
There is disclosed an organic optical component prepared from a resin essentially comprising one or more repetitive structural units selected from the group consisting of structures represented by general formula (1);
wherein A is either of the groups below.
This invention provides an organic optical component with excellent transparency, heat resistance and mechanical strength as well as a low birefringence. This invention also provides a novel aromatic polyamide with a low permitivity and excellent transparency, processability and thermal stability, besides excellent heat resistance inherent in an aromatic polyamide.
本发明公开了一种有机光学元件,由基本上包含一个或多个重复结构单元的树脂制备而成,这些重复结构单元选自由通式(1)所代表的结构组成的组;
其中 A 为以下任一基团。
本发明提供了一种具有优异透明度、耐热性和机械强度以及低双折射的有机光学元件。本发明还提供了一种新型的芳香族聚酰胺,除了具有芳香族聚酰胺固有的优异耐热性外,还具有较低的容许率和优异的透明度、加工性和热稳定性。