Flexible copper/polyimide and barbituric acid modified bismaleim

Details Flexible copper/polyimide and barbituric acid modified bismaleim Flexible copper/polyimide and barbituric acid modified bismaleim

1992-12-16

1994-12-13

Nakarani, D. S.

Stock material or miscellaneous articles

Composite

Of metal

4284735, 525426, 15624411, B32B 1508

Patent

active

053728912

ABSTRACT:
An improved polyimide-based coating composition comprising a polyimide upper layer and a polyimide-modified bismaleimide lower layer for use as a coating on metal substrate, such as an electrolytic copper foil. The polyimide are prepared from reactions between diamines, such as p-phenylene diamine and 4-4'-diaminodiphenyl ether, and dianhydrides, such as 3,3',4,4'-benzophenone tetracarboxylic dianhydride and biphenyl-3,3',4,4'-tetracarboxylic dianhydride. The modified bismaleimide can be prepared from reacting an N,N',4,4'-diphenyl bismaleimide with a barbituric acid or its derivative. A double-layered extrusion coating technique having a double-layered extrusion die is utilized to apply the coating composition onto the metal substrate. The final laminated products show improved peel strength between the polyimide coating and the substrate, as well as improved dimensional stability and surface flatness thereof.

REFERENCES:
patent: 4097545 (1978-06-01), Akiyama et al.
patent: 4675246 (1987-06-01), Kundinger
patent: 4788098 (1988-11-01), Sado et al.
patent: 4985509 (1991-01-01), Matuura et al.
patent: 5200474 (1993-04-01), Chen et al.
Jpn. Kokai Tokyo Koho JP03/123,093, 61131d (CA Selects, Polyimides, Issue 5, 1992).
T. Paskal, et al., "New Semi-Interpenetrating Polymeric Networks from Linear Polyimides and Thermosetting Bismaleimides:2 Mechanical and Thermal Prop. of the blends," Polymer, 1990, vol. 31, Jan. pp. 78-83.

Affiliated with

Also associated with

Rating

Flexible copper/polyimide and barbituric acid modified bismaleim does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Flexible copper/polyimide and barbituric acid modified bismaleim, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Flexible copper/polyimide and barbituric acid modified bismaleim will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1192358