# US 10,373,729 B2 · Composition for forming coat-type insulating film > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,373,729 B2 - Document ID: US10373729B2 - Status: Granted - Kind: B2 - Application number: 15/508,772 - Filed: 2015-08-25 - Published: 2017-09-21 - Granted: 2019-08-06 - Earliest claimed: 2014-09-03 - Assignees: Daicel Corporation - Applicants: Daicel Corporation - Inventors: Yasuyuki Akai; Youji Suzuki; Takeshi Yokoo - Web page: https://patentgrep.com/patent/US10373729B2 ## CPC - H01B 3/441: {from alkenes} - C09D 7/20: Diluents or solvents - C09D 145/00: Coating compositions based on homopolymers or copolymers of compounds having no unsaturated aliphatic radicals in a side chain, and having one or more carbon-to-carbon double bonds in a carbocyclic or in a heterocyclic system; Coating compositions based on derivatives of such polymers (based on polymers of cyclic esters of polyfunctional acids C09D131/00; based on polymers of cyclic anhydrides or imides C09D135/00) - H10P 14/6342: {Liquid deposition, e.g. spin-coating, sol-gel techniques or spray coating} - H10P 14/683: {carbon-based polymeric organic materials, e.g. polyimides, poly cyclobutene or PVC} - C08L 2201/56: Non-aqueous solutions or dispersions - H01B: CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES (selection for magnetic properties H01F1/00; waveguides H01P {; printed circuits H05K}) - 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) - H10P: GENERIC PROCESSES OR APPARATUS FOR THE MANUFACTURE OR TREATMENT OF DEVICES COVERED BY CLASS H10 - C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06) ## Abstract Provided is an insulating coating composition. The composition is highly safe, in which an organic material to form an insulating film is dissolved highly stably. The composition can form an insulating film by coating, where the insulating film has a low relative permittivity, a high insulation resistance, and high wettability and allows an upper layer to be formed thereon by coating. The insulating coating composition according to the present invention contains a cyclic olefin copolymer and a solvent. The cyclic olefin copolymer is a copolymer between a cyclic olefin and a chain olefin. The solvent includes a compound represented by Formula (1) and having a normal boiling point of 100° C. to lower than 300° C. In Formula (1), Ring Z is a ring selected from a 5- or 6-membered saturated or unsaturated cyclic hydrocarbon and a benzene ring; and R1 is selected from a hydrocarbon group and acyl. Ring Z has a substituent or substituents including the R1O group. When Ring Z has two or more substituents, two of the substituents may be linked to each other to form a ring with a carbon atom or atoms constituting Ring Z. ## Claims ### Claim 1 An insulating coating composition, comprising: a cyclic olefin copolymer being a copolymer between a cyclic olefin and a chain olefin; and a solvent comprising a compound being represented by Formula (1) and having a normal boiling point of from 100° C. to lower than 300° C., Formula (1) expressed as follows: wherein Ring Z is a ring selected from a 5- or 6-membered saturated or unsaturated cyclic hydrocarbon and a benzene ring; and R1 is selected from a hydrocarbon group and acyl, where Ring Z has one or more substituents including R1O group, and where, when Ring Z has two or more substituents, two of the substituents may be linked to each other to form a ring with a carbon atom or atoms constituting Ring Z, wherein the cyclic olefin copolymer is a copolymer consisting of a monomer unit represented by Formula (2) and derived from optionally substituted norbornene, and a monomer unit represented by Formula (3) and derived from the C2-C8 chain α-olefin, Formulae (2) and (3) are expressed as follows: wherein R2 and R3 are each, identically or differently, selected from hydrogen, halogens, hydroxy, substituted oxys, carboxy, substituted oxycarbonyls, substituted or unsubstituted carbamoyls, cyano, nitro, substituted or unsubstituted aminos, sulfo, heterocyclic groups except for heterocyclic groups containing an oxirane ring, alkyls, alkenyls, alkynyls, C3-C8 cycloalkyls, and aryls and R4 is selected from hydrogen atom and C1-C6 alkyl. ### Claim 2 (depends on 1) The insulating coating composition according to claim 1, wherein the solvent comprises at least one compound selected from the group consisting of cyclohexyl methyl ether, cyclohexanol acetate, methoxybenzene, ethoxybenzene, and cyclopentyl methyl ether. ### Claim 3 (depends on 1) The insulating coating composition according to claim 1, wherein the composition has a viscosity of 0.1 to 5000 mPa·s at a temperature of 25° C. and a shear rate of 10 s−1. ### Claim 4 (depends on 2) The insulating coating composition according to claim 2, wherein the composition has a viscosity of 0.1 to 5000 mPa·s at a temperature of 25° C. and a shear rate of 10 s−1.