Resin composition, cured product, molding and method for producing same, and film capacitor and method for producing same
A resin composition for casting, containing a curable component and expandable graphite. A molded body including an element and a sealing portion that seals the element, in which the sealing portion contains the resin composition or a cured product thereof.
1. A resin composition for casting, comprising:
a curable component comprising a curable resin and a curing agent, wherein the curing agent includes an acid anhydride;
expandable graphite, wherein a major axis of the expandable graphite is 800 μm or less; and
a filler containing silica,
wherein a viscosity in a case in which the viscosity is measured using a B type viscometer under conditions of 40° C. and 60 rpm is 8.0 Pa·s or less,
wherein a content of silica is 30% by mass or more based on a total mass of the resin composition excluding the mass of solvent, and
wherein a content of the curing agent is 15% to 55% by mass based on the total mass of the resin composition excluding the mass of solvent.
2. The resin composition according to claim 1 , wherein the curable component includes an epoxy resin.
3. A cured product of the resin composition according to claim 1 .
4. A molded body comprising: an element and a sealing portion that seals the element,
wherein the sealing portion contains the resin composition according to claim 1 or a cured product thereof.
5. A method for producing a molded body, the method comprising casting the resin composition according to claim 1 to obtain a molded body.
6. A film capacitor comprising: a film capacitor element and a sealing portion that seals the film capacitor element,
wherein the sealing portion contains the resin composition according to claim 1 or a cured product thereof.
7. A method for producing a film capacitor, the method comprising casting the resin composition according to claim 1 to obtain a film capacitor comprising a sealing portion that seals a film capacitor element.
8. The resin composition according to claim 1 , wherein a major axis of the expandable graphite is more than 200 μm.
9. The resin composition according to claim 1 , wherein a content of the expandable graphite is less than 35% by mass.
10. The resin composition according to claim 1 , wherein the curable component includes a thermosetting resin.
11. The resin composition according to claim 1 , wherein the filler further contains aluminum hydroxide.
12. The resin composition according to claim 1 , wherein the filler further contains melamine cyanurate.
13. The resin composition according to claim 1 , wherein an average particle size of the filler is 2 to 30 μm.
14. The resin composition according to claim 1 , wherein a content of the filler is 30% to 80% by mass.
15. The resin composition according to claim 1 , wherein a major axis of the expandable graphite is 500 μm or less and the curable component includes a thermosetting resin.
16. The resin composition according to claim 1 , wherein a content of the expandable graphite is less than 35% by mass and the curable component includes a thermosetting resin.
17. A resin composition for casting, comprising:
a curable component, wherein the curable component includes a thermosetting resin and a curing agent, wherein the curing agent includes an acid anhydride;
expandable graphite; and
a filler containing silica,
wherein a viscosity in a case in which the viscosity is measured using a B type viscometer under conditions of 40° C. and 60 rpm is 8.0 Pa·s or less,
wherein a content of silica is 30% by mass or more based on a total mass of the resin composition excluding the mass of solvent, and
wherein a content of the curing agent is 15% to 55% by mass based on the total mass of the resin composition excluding the mass of solvent.