Sulfones as solvents in catalysts of U.V. curable systems
AssigneeAmerican Can Company
InventorJacob Howard Feinberg
Life of this patent
Estimating the term…
Abstract
Stable diazonium catalyst solutions are provided in which the catalyst is dissolved in an organic sulfone. The catalyst solutions have greatly extended shelf-life while at the same time retain the ability to rapidly cure epoxy resins upon exposure to an energy source. Polymerizable compositions of the two-package type, comprising polymerizable epoxy materials and such catalyst solutions are also provided.
Claims13
A polymerizable composition, capable of being shipped and stored as a two-package system, consisting essentially of (1) a monomeric or prepolymeric epoxide material or mixture thereof with a monomer selected from the group consisting of lactones and vinyl-containing compounds, said material being polymerizable to higher molecular weights through the action of a cationic catalyst and (2) a radiation-sensitive aromatic diazonium salt of a complex halogenide, which decomposes upon application of energy to release a Lewis Acid effective to initiate polymerization of said epoxide material, dissolved in an organic sulfone, said organic sulfone being substantially inert to said diazonium salt and to said epoxide material.
A polymerizable composition, capable of being shipped and stored as a two-package system, consisting essentially of, as one component, a liquid monomeric or prepolymeric epoxide material or mixture of epoxide materials with a monomer selected from the group consisting of gamma butyrolactone, styrene and dodecyl vinyl ether, said mixture being polymerizable to higher molecular weights through the action of a cationic catalyst and as a second component, an aromatic diazonium salt of a complex halogenide which decomposes upon application of energy to provide a halide Lewis acid effective to initiate polymerization of said epoxide material, dissolved in a tetrahydrothiophene-1,1-dioxide solvent, said solvent being substantially inert to said diazonium salt and to said epoxide material.
Dependencies are inferred from the claim text.