C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
C08L 71/12 (2006.01) C08J 5/24 (2006.01) C08L 63/00 (2006.01) C08L 63/02 (2006.01) H05K 1/03 (2006.01)
Patent
CA 2102484
The compositions of the present invention consist essentially of: (A) at least one polyphenylene ether having a number average molecular weight of at least about 12,000; (B) an epoxy material selected from the group consisting of (B-1) at least one polyglycidyl ether of a bisphenolic compound, said polyglycidyl ether having an average of at most one aliphatic hydroxy group per molecule, and combinations of a major amount of said polyglycidyl ether with a minor amount of at least one of (B-2) aryl monoglycidyl ethers and (B-3) non-bisphenolic polyepoxy compounds; wherein the composition comprises up to about 90% by weight of component A, based on components A and B; (C) an effective amount of a curing catalyst comprising an aluminum or zinc salt; and (D) an effective amount of an imide curing co-catalyst. Cured compositions prepared in such fashion are homogeneous resins having high physical strength, excellent electrical properties, and capability of fabrication by such operations as coating, injection molding, pultrusion, and resin transfer molding. For many applications, including electrical application such as the preparation of printed circuit boards, the properties of said cured compositions are equivalent or superior to those of cured epoxy resins typically used for the same purposes.
Davis Michael J.
Tracy James E.
Trewiler Carl E.
Company General Electric
Craig Wilson And Company
Polyclad Laminates Inc.
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