Stock material or miscellaneous articles – Composite – Of polyimide
Patent
1991-07-29
1993-01-12
Gallagher, John J.
Stock material or miscellaneous articles
Composite
Of polyimide
1563074, 1563311, 427 38, 528339, 528347, B32B 2700
Patent
active
051789647
ABSTRACT:
A polyimide resin or composite may be pretreated by heating a reaction mixture that initially includes an aromatic diamine monomer, an end cap monomer, and an aromatic dianhydride monomer to a temperature between about 250.degree. C. and about 300.degree. C. for a period sufficient to completely imidize the reaction mixture to an imide resin without substantial crosslinking. A crosslinked reinforced polyimide composite article may be fabricated by heating a plurality of prepregs to a first temperature between about 250.degree. C. and about 300.degree. C. for a first period sufficient to completely imidize the prepreg without substantial crosslinking. Each prepreg has a plurality of reinforcing fibers and a reaction mixture. The prepregs are stacked in a desired orientation to form a laminated structure before or after heating to the first temperature and further heated at a superatmospheric pressure to a second temperature for a second period to form a crosslinked reinforced polyimide composite article by consolidating the prepregs and crosslinking the imide resin in the prepreg.
REFERENCES:
patent: 3925587 (1975-12-01), Park
patent: 4197339 (1980-04-01), Paul et al.
patent: 4576857 (1986-03-01), Gannett et al.
patent: 4579782 (1986-04-01), Kumar et al.
patent: 4600769 (1986-07-01), Kumar et al.
patent: 4765942 (1988-08-01), Christensen et al.
patent: 4769197 (1988-09-01), Kromrey
patent: 4877653 (1989-10-01), Vora et al.
patent: 4898754 (1990-02-01), Christensen et al.
patent: 5104474 (1992-04-01), Scola et al.
"Processing of PMR-15 Prepregs for High Temperature Composites," by Mel Kantz, published in Plastics Engineering, vol. 46, No. 1, Jan. 1990, at pp. 27-30.
Scola Daniel A.
Vontell John H.
Gallagher John J.
Romanik George J.
United Technologies Corporation
LandOfFree
Fabricating crosslinked polyimide high temperature composites an does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Fabricating crosslinked polyimide high temperature composites an, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fabricating crosslinked polyimide high temperature composites an will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1219139