| 摘要 |
<p>HEAT-CURABLE COMPOSITIONS Compositions that cure when heated comprise (A) an epoxide resin and (B) an effective amount of (i) a diaryliodosyl salt of formula < IMG > where R1 and R2, 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 MXn- 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 .alpha.-hydroxy compound. Typically, the epoxide resin (A) is a bisphenyl 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.</p> |
