B - Operations – Transporting – 32 – B
Patent
B - Operations, Transporting
32
B
117/196, 117/113
B32B 15/08 (2006.01) B32B 27/04 (2006.01) C08J 3/09 (2006.01) C08J 5/24 (2006.01) H05K 1/03 (2006.01)
Patent
CA 2019528
POLYETHERIMIDE PRECURSOR REINFORCED LAMINATES AND THE PREPARATION THEREOF ABSTRACT OF THE DISCLOSURE The present invention is directed to the manufacture of polyetherimide resin reinforced laminates where their production is via conventional prepreg processing techniques. Broadly, then, the present invention is directed to a method for making a reinforced prepreg of polyetherimide-forming resin. The method comprises forming a solvent solution of a polyetheramide acid and immersing a web of reinforcement in said solution. The immersed web then is withdrawn and heated to evaporate the solvent and form the prepreg. Complete conversion ofthe polyamic acid to polyetherimide may be effected in a treater oven capable of maintaining a suitably high temperature required for the particular polyamic acid used (e.g. around 300°C); otherwise pre-conditioning the prepreg in a separate heating unit is desirable. Thereafter, the prepreg can be laminated to metal foil, optionally with additional prepregs. The laminate is formed by heating said prepreg and metal foil under pressure for a time adequate to bond the foil.
Davis Michael J.
Tracy James E.
Company General Electric
Craig Wilson And Company
Davis Michael J.
Tracy James E.
LandOfFree
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