Heat-curable epoxy compositions containing diaryliodosyl salts

Abstract

Abstract Compositions that cure when heated comprise (A) an epoxide resin and (B) an effective amount of (i) a diaryliodosyl salt of formula ##STR1## where R 1 and R 2 , which may be the same or different, each represents a monovalent aromatic radical of from 4 to 25 carbon atoms, such as a substituted or unsubstituted phenyl group, M represents a metal or metalloid atom, such as phosphorus or boron, X represents a halogen atom, particularly chlorine or fluorine, and n is 4, 5, or 6, and is greater by one than the valency of M or MX n - represents pentafluorohydroxoantimonate, and (ii) a catalyst for the diaryliodosyl salt which is a salt or complex of a d-block transition metal, a stannous salt, an organic peroxide, or an α-hydroxy compound. Typically, the epoxide resin (A) is a bisphenol A diglycidyl ether, the salt (i) is diphenyliodosyl tetrafluoroborate or hexafluorophosphate, and the catalyst (ii) is cupric acetylacetonate or benzpinacol. The compositions may be used in moulding materials, coatings, sealants, adhesives, composites, laminates, and impregnated tapes.

Inventors

• 👤 Edward Irving

Bibliographic Details