摘要:
The invention is directed to polyimide based materials having improved electrical and mechanical performance, and also to a process of making such materials. The compositions of the invention comprise: i. a polyimide base polymer in an amount of at least 60 weight percent; ii. a discontinuous phase of inorganic material present in an amount of at least 4 weight percent; iii. a non-ionic halogenated dispersing agent in an amount of at least 0.1 weight percent; and iv. up to 30 weight percent of other optional ingredients, such as, fillers, processing aids, colorants, or the like. The compositions of the invention generally exhibit excellent high frequency performance and can be manufactured by incorporating the dispersing agent and inorganic material into a polyamic acid solution and then converting the polyamic acid solution into a polyimide by conventional or non-conventional means.
摘要:
The present invention relates to a polyphosphate-containing halogen-free adhesive, primarily used as an adhesive. The composition comprising the polyphosphate group compounds which effectively meets the needs for environmental protection and flame retardancy, and the high flexibility and flame retardancy of the adhesive made it suitable for using on printed circuit board, especially the flexible printed circuit board.
摘要:
Laminates containing a layer of conductive polyaniline are provided for various uses such as actuator devices. The laminates are controllably deformable and can operate on an electromechanical, chemomechanical, and mechanoelectrical modes. The laminates are preferably constructed so as to have a first flexible layer of polyaniline and a second flexible layer of polyaniline surmounted thereon. The polyaniline layers are separated by an electronically insulating layer.