Curable composition and the use thereof
AssigneeCiba-Geigy Corporation
InventorsKurt Meier, Giuliano Eugster, Franz Schwarzenbach, Hans Zweifel
Life of this patent
Estimating the term…
Abstract
Iron (II)-aromatic compound complexes mixed with electron acceptors as an oxidizing agent are suitable initiators for the polymerization by irradiation of organic material which can be polymerized by cations and/or free radicals. The composition composed of the polymerizable material and of the initiator mixture is suitable for the production of protective coatings and can be used as a photographic recording material.
Claims16
A curable composition containing a) a material which is polymerizable by free radicals or cations, a mixture of said materials or a metal which is polymerizable by free radicals and cations, b) at least one iron compound of the formula I ##EQU3## in which a is 1 or 2 and q is 1, 2 or 3, L is a divalent to heptavalent metal or non-metal, Q is a halogen atom, m is an integer corresponding to the sum of the valencies of L and q, R.sup.1 is a .pi.-arene and R.sup.2 is the anion of a .pi.-arene, and c) at least one electron acceptor as an oxidising agent.
A process for the polymerisation of a material which is polymerizable by free radicals or cations a mixture of said materials or a material which is polymerizable by free radicals and cations, by the action of radiation in the presence of a photoinitiator and, if appropriate, by heating, wherein the photoinitiator is a mixture of a) at least one iron compound of the formula I ##EQU4## in which a is 1 or 2 and q is 1, 2 or 3, L is a divalent to heptavalent metal or non-metal, Q is a halogen atom, m is an integer corresponding to the sum of the valencies of L and q, R.sup.1 is a .pi.-arene and R.sup.2 is the anion of a .pi.-arene, and b) at least one electron acceptor as the oxidising agent and, if desired, polymerisation is completed subsequently by the application of heat.
Dependencies are inferred from the claim text.