JPS57128741A - Insulating material for casting - Google Patents
Insulating material for castingInfo
- Publication number
- JPS57128741A JPS57128741A JP1540981A JP1540981A JPS57128741A JP S57128741 A JPS57128741 A JP S57128741A JP 1540981 A JP1540981 A JP 1540981A JP 1540981 A JP1540981 A JP 1540981A JP S57128741 A JPS57128741 A JP S57128741A
- Authority
- JP
- Japan
- Prior art keywords
- alumina
- epoxy resin
- filler
- pref
- acid anhydride
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
- Epoxy Resins (AREA)
Abstract
PURPOSE: To provide an insulating material having controllable pot-life and formable easily to a large article having complicated shape, by compounding an epoxy resin composition containing an acid anhydride hardener with a filler comprising a combination of two kinds of alumina having different reactivity caused by different impurity content.
CONSTITUTION: A composition composed of an epoxy resin and an acid anhydride hardener is compounded with a filler obtained by mixing (A) the first alumina powder having a particle size of ≤44μm and obtained by pulverzing a high-purity alumina having an alumina content of ≥99.5% in a mill made of alumina porcelain with (B) an arbitrary amount of the second alumina prepared by washing the first alumina powder with an aqueous solution of an inorganic acid and draining and drying the product. The amounts of the first and the second alumina in the filler are pref. 5W70wt% and 95W30wt%, respectively, and the amount of the alumina powder mixture in the epoxy resin composition is pref. 40W60vol%.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1540981A JPS57128741A (en) | 1981-02-03 | 1981-02-03 | Insulating material for casting |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1540981A JPS57128741A (en) | 1981-02-03 | 1981-02-03 | Insulating material for casting |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS57128741A true JPS57128741A (en) | 1982-08-10 |
JPS623179B2 JPS623179B2 (en) | 1987-01-23 |
Family
ID=11887933
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1540981A Granted JPS57128741A (en) | 1981-02-03 | 1981-02-03 | Insulating material for casting |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57128741A (en) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS54163394A (en) * | 1978-06-15 | 1979-12-25 | Sumitomo Electric Industries | Method of manufacturing epoxy resin injection article |
JPH0284293A (en) * | 1988-06-14 | 1990-03-26 | Kobe Steel Ltd | Submerged arc welding method for high-strength cr-mo steel |
-
1981
- 1981-02-03 JP JP1540981A patent/JPS57128741A/en active Granted
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS54163394A (en) * | 1978-06-15 | 1979-12-25 | Sumitomo Electric Industries | Method of manufacturing epoxy resin injection article |
JPH0284293A (en) * | 1988-06-14 | 1990-03-26 | Kobe Steel Ltd | Submerged arc welding method for high-strength cr-mo steel |
Also Published As
Publication number | Publication date |
---|---|
JPS623179B2 (en) | 1987-01-23 |
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