Oxygen-curable coating composition
AssigneeDymax Corporation
InventorsStephen E. Cantor, Leon Levine
Life of this patent
Estimating the term…
Abstract
An acrylate composition, especially useful for producing conformal coatings on circuit board assemblies, includes a photoinitiator and an air-curing system, the latter being comprised of a compound having multiple allyloxy groups in its molecule and a transition metal salt catalyst. The composition is highly stable against auto-induced reaction in the absence of oxygen and at room temperature; it contains no active oxygen catalyst and no nonreactive diluent, and is advantageously formulated as a one-part product.
Claims19
A liquid coating composition comprising, on a weight basis, 15 to 60 parts of a free-radical reactive acrylate monomer constituted of less than about 20 weight percent polyfunctional molecules;
- 5 to 25 parts of an air-curing polyether-ene polymer containing at least three activated double bonds per molecule;
- a catalytic amount of photoinitiator;
- and a catalytic amount of a dissolved transition metal ion, said composition being free from acrylated carbonate polymers, added active oxygen catalytic compounds, oxygen-reaction inhibitors, and inert solvents.
An article of manufacture comprising a substrate and a cured coating thereon, said coating being produced from a composition comprising, on a weight basis, 15 to 60 parts of a free-radical reactive acrylate monomer constituted of less than about 20 weight percent polyfunctional molecules;
- 5 to 25 parts of an air-curing polyether-ene polymer containing at least three activated double bonds per molecule;
- 5 to 40 parts of a reactive oligomer;
- a catalytic amount of photoinitiator;
- and a catalytic amount of a dissolved transition metal ion, said composition being free from acrylated carbonate polymers, added active oxygen catalytic compounds, oxygen-reaction inhibitors, and inert solvents;
- said coating being at least two mils in thickness.
A method for producing an article of manufacture, including the steps:
- providing a substrate;
- depositing upon said substrate a coating composition comprising, on a weight basis, 15 to 60 parts of a free-radical reactive acrylate monomer constituted of less than about 20 weight percent polyfunctional molecules;
- 5 to 25 parts of an air-curing polyether-ene polymer containing at least three activated double bonds per molecule;
- a catalytic amount of photoinitiator;
- and a catalytic amount of a dissolved transition metal ion, said composition being free from acrylated carbonate polymers, added active oxygen catalytic compounds, oxygen-reaction inhibitors, and inert solvents;
- and exposing said substrate, as so coated, to radiation for activating said photoinitiator to initiate curing of said deposited composition.
Dependencies are inferred from the claim text.