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公开(公告)号：EP3845490A1
公开(公告)日：2021-07-07
申请号：EP20804970.0
申请日：2020-05-13
摘要： There is provided a silica-blended resin varnish containing a silica sol that has a high dispersibility and is dispersed in a ketone organic solvent, in a nitrogen atom-containing polymer.
A sol (silica sol) in which silica particles are dispersed in a ketone solvent.
The silica particles have an average particle size of 5 to 100 nm and have a carbon-carbon unsaturated bond-containing organic group and an alkoxy group bonded to surfaces thereof.
The carbon-carbon unsaturated bond-containing organic group is bonded at 0.5 to 2.0 groups per unit area (nm 2 ) of the surfaces of the silica particles.
The alkoxy group is bonded at 0.1 to 2.0 groups per unit area (nm 2 ) of the surfaces of the silica particles.
The molar ratio of {(the carbon-carbon unsaturated bond-containing organic group)/(the alkoxy group)} is 0.5 to 5.0.
The carbon-carbon unsaturated bond-containing organic group may be a phenyl group-containing organic group or a (meth)acryloyl group-containing organic group. An insulating resin composition contains the silica sol and a nitrogen-containing polymer. The nitrogen-containing polymer may be polyimide, polyamide, polyamic acid, polyamide-imide, polyetherimide, or polyesterimide.-
2.发明公开
公开(公告)号：EP4053077A1
公开(公告)日：2022-09-07
申请号：EP21889246.1
申请日：2021-11-04
IPC分类号： C01B33/145 , C01B33/146 , C09D5/25 , H01B3/00 , C09D7/62
摘要： There is provided a silica sol dispersed in a nitrogen-containing solvent and a silica-containing resin composition (in particular, an insulating resin composition) containing a nitrogen atom-containing polymer.
A silica sol comprising silica particles containing aluminum atoms and having an average primary particle diameter of 5 to 100 nm, the silica particles being dispersed in a nitrogen-containing solvent, wherein the aluminum atoms are bonded to the surfaces of the silica particles in an amount in terms of Al 2 O 3 of 800 to 10,000 ppm/SiO 2 . The silica particles are bonded to a silane compound or a hydrolysate of the silane compound. The nitrogen-containing solvent is an amide solvent. The nitrogen-containing solvent is dimethylacetamide, dimethylformamide, N-methylpyrrolidone, or N-ethylpyrrolidone. The insulating resin composition comprising the silica sol and a nitrogen-containing polymer. The nitrogen-containing polymer is polyimide, polyamide, polyamic acid, polyamideimide, polyetherimide, or polyesterimide. An insulation-coated conductor wire produced by insulation coating of a conductor wire with the insulating resin composition.
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