Anionic photoinitiation
AssigneesUniversity of Georgia Research Foundation, Inc., The University of Georgia
InventorCharles R. Kutal
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Abstract
A method for the anionic photoinitiation of polymerization or crosslinking of a substrate by irradiating a mixture of a substrate and a photoinitiator, where the photoinitiator is an inorganic transition metal complex which releases on irradiation a polymerization initiating substance consisting essentially of an anionically charged nucleophile that initiates the polymerization or crosslinking reaction, under conditions that allow the anion to initiate polymerization. FIG. 3 is plot of percentage polymerization of ethyl .alpha.-cyanoacrylate containing different concentration of Reineckate's anion.
Claims26
A method for anionically polymerizing or crosslinking a compound, monomer, oligomer, or polymer, comprising the step of irradiating a mixture of a compound, monomer, oligomer, or polymer and an inorganic transition metal complex selected from the group consisting of optionally substituted ferrocene complexes comprising at least one Fe atom complexed with two or more cyclopentadienyl moieties, wherein one or more of the cyclopentadienyl groups in the complex may be optionally substituted with at least one substituent of the formula --C(O)R, wherein R is a C.sub.1 to C.sub.10 aliphatic group selected from the group consisting of alkyl, alkenyl, or alkynyl, or is aryl, under irradiation conditions sufficient for the inorganic transition metal complex to photochemically react to release a polymerization initiating substance consisting essentially of an anionically charged nucleophile capable of initiating a polymerization or crosslinking reaction of the compound, monomer, oligomer, or polymer.
A method for anionically polymerizing or crosslinking a compound, monomer, oligomer, or polymer, comprising the step of irradiating a mixture of a compound, monomer, oligomer, or polymer and an inorganic transition metal complex selected from the group consisting of optionally substituted ruthenocene complexes comprising at least one Ru atom complexed with two or more cyclopentadienyl moieties, wherein one or more of the cyclopentadienyl groups in the complex is optionally substituted with one or more substituents of the formula --C(O)R, wherein R is a C.sub.1 to C.sub.10 aliphatic group selected from the group consisting of alkyl, alkenyl, or alkynyl, or is aryl, under irradiation conditions sufficient for the inorganic transition metal complex to photochemically react to release a polymerization initiating substance consisting essentially of an anionically charged nucleophile capable of initiating a polymerization or crosslinking reaction of the compound, monomer, oligomer, or polymer.
Dependencies are inferred from the claim text.