This invention relates to compounds of the general formula:
1
in which R
A
, R
B
, R
C
, R
D
, R
G
and Z are as defined herein, and to their preparation and use.
Novel pyrazolo- and pyrrolo-pyrimidines and uses thereof
申请人:——
公开号:US20030114467A1
公开(公告)日:2003-06-19
The invention relates to compounds of the general formula:
1
in which R
A
-R
C
and W are as defined herein, and to their preparation and use.
这项发明涉及一般公式为:1的化合物,其中RA-RC和W如本文所定义,以及它们的制备和用途。
Process of manufacturing DOPO derivatives for printed circuit board and low-earth orbit spacecraft applications
申请人:Lin Ching-Hsuan
公开号:US20080021193A1
公开(公告)日:2008-01-24
A method of manufacturing new materials for a printed circuit board and Low-Earth Orbit (LEO) spacecraft is provided. The present invention includes dinitro, diamine, various phosphorous-containing polyimides and polyamides, and synthesizing methods thereof. The polymers of the embodiment of present invention exhibit good flame retardancy, high glass transition temperature, good mechanical properties and superior oxygen resistance, so they are good materials for Low-Earth Orbit applications. Besides, these polymers can also be used as matrix for halogen-free flexible printed circuit board.