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US 4,283,312 AGranted
Heat curable processable epoxy compositions containing aromatic iodonium salt catalyst and copper salt cocatalyst
AssigneeGeneral Electric Company
InventorJames V. Crivello
Life of this patent
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Abstract
Aromatic onium salts, such as diaryliodonium salts, have been found to be effective thermal initiators for the polymerization of epoxy resins having a viscosity of up to about 100,000 centipoises at 25.degree. C. when used in combination with copper salts. The processable epoxy resin composition can be used in filament winding and pultrusion applications.
Claims5
A processable heat curable epoxy resin composition comprising
- (A) an epoxy resin having a viscosity of from about 100 to 100,000 centipoises at 25.degree. C.
- (B) an effective amount of an aromatic iodonium salt catalyst of the formula,
- [(R).sub.a (R.sup.1).sub.b I].sub.c.sup.+ [MQ.sub.d ].sup.-(d-e),
- and
- (C) an effective amount of a copper salt cocatalyst, where R is a monovalent aromatic organic radical, R.sup.1 is a divalent aromatic organic radical, M is a metal or metalloid, Q is a halogen radical, a is a whole number equal to 0 or 2, b is a whole number equal to 0 or 1 and the sum of a+b is equal to 1 or 2, c=d-e, e equals the valence of M and is an integer equal to 2-7 inclusive and d>e and is an integer having a value up to 8.
2 more elements
Dependencies are inferred from the claim text.