# US 5,703,138 A · Oxygen-curable coating composition > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,703,138 A - Document ID: US5703138A - Status: Granted - Kind: A - Application number: 08/685,492 - Filed: 1996-07-24 - Granted: 1997-12-30 - Earliest claimed: 1994-01-12 - Assignees: Dymax Corporation - Inventors: Stephen E. Cantor; Leon Levine - Web page: https://patentgrep.com/patent/US5703138A ## CPC - C09D 4/06: {Organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond} in combination with a macromolecular compound other than an unsaturated polymer of groups C09D159/00 - C09D187/00 - C09D 4/00: Coating compositions, e.g. paints, varnishes or lacquers, based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond {; Coating compositions, based on monomers of macromolecular compounds of groups C09D183/00 - C09D183/16} - Y10T 428/31692: Next to addition polymer from unsaturated monomers - Y10T 428/31797: Next to addition polymer from unsaturated monomers - C09D: COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR (cosmetics A61K; processes for applying liquids or other fluent materials to surfaces, in general, B05D; staining wood B27K5/02; glazes or vitreous enamels C03C; natural resins, French polish, drying-oils, driers, turpentine, per se, C09F; polishing compositions other than French polish, ski waxes C09G; adhesives or use of materials as adhesives C09J; materials for sealing or packing joints or covers C09K3/10; materials for stopping leaks C09K3/12; processes for the electrolytic or electrophoretic production of coatings C25D) - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## 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. ## Claims ### Claim 1 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. ### Claim 2 (depends on 1) The composition of claim 1 wherein said polyether-ene polymer is an allyloxy compound. ### Claim 3 (depends on 2) The composition of claim 2 wherein said allyloxy compound has the structural formula: ##STR6## ### Claim 4 (depends on 2) The composition of claim 2 wherein said allyloxy compound contains at least ten allyloxy groups in the molecule, and wherein said composition comprises 10 to 20 parts of said allyloxy compound. ### Claim 5 (depends on 1) The composition of claim 1 further including 5 to 40 parts of a reactive oligomer. ### Claim 6 (depends on 1) The composition of claim 1 wherein said transition metal ion is selected from the group consisting of cobalt, manganese, vanadium, and cerium. ### Claim 7 (depends on 1) The composition of claim 1 further including 1 to 10 parts of a reactive diluent selected from the class consisting of vinyl ethers, epoxides, and vinyl amides. ### Claim 8 (depends on 1) The composition of claim 1 formulated as a single part, said composition being substantially stable, in the absence of oxygen, against auto-induced reaction. ### Claim 9 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. ### Claim 10 (depends on 9) The article of claim 9 wherein said polyether-ene polymer is an allyloxy compound. ### Claim 11 (depends on 10) The article of claim 10 wherein said allyloxy compound has the structural formula: ##STR7## ### Claim 12 (depends on 9) The article of claim 9 wherein said substrate is a circuit board assembly. ### Claim 13 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. ### Claim 14 (depends on 13) The method of claim 13 wherein said polyether-ene polymer is an allyloxy compound. ### Claim 15 (depends on 14) The method of claim 14 wherein said allyloxy compound has the structural formula: ##STR8## ### Claim 16 (depends on 14) The method of claim 14 wherein said composition further includes 5 to 40 parts of a reactive oligomer. ### Claim 17 (depends on 13) The method of claim 13 wherein curing of said deposited composition is effected at room temperature. ### Claim 18 (depends on 13) The method of claim 13 wherein said coating is at least about two mils in thickness, and wherein curing thereof produces a conformal coating on said substrate. ### Claim 19 (depends on 13) The method of claim 13 wherein said substrate is a circuit board assembly.