GB1169691A - Improvements in or relating to Electrical Insulation - Google Patents
Improvements in or relating to Electrical InsulationInfo
- Publication number
- GB1169691A GB1169691A GB3133565A GB3133565A GB1169691A GB 1169691 A GB1169691 A GB 1169691A GB 3133565 A GB3133565 A GB 3133565A GB 3133565 A GB3133565 A GB 3133565A GB 1169691 A GB1169691 A GB 1169691A
- Authority
- GB
- United Kingdom
- Prior art keywords
- sheet
- mica
- mica tape
- bisphenol
- mixture
- 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.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/02—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances
- H01B3/04—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances mica
Landscapes
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Insulating Bodies (AREA)
- Manufacture Of Motors, Generators (AREA)
Abstract
1,169,691. Mica coatings. ENGLISH ELECTRIC CO. Ltd. 20 Oct., 1966 [22 July, 1965], No. 31335/65. Heading B2E. [Also in Divisions B5, H1 and H2] Mica tape or sheet for use as electrical insulation is impregnated with a heat-curable synthetic resin substance which comprises a mixture of bisphenol A epoxy resin and one or more cycloaliphatic resins. There may be between 50 and 70% by wt. of bisphenol A epoxy resin in the mixture. The mica tape or sheet is prepared by bonding one or more layers of individual mica flakes or sheets of mica paper to a backing material e.g. one or more layers of glass cloth, silk, synthetic fabrics or mixtures of such materials, with a bonding agent which may be bisphenol A epoxy resin, or an epoxy phenolic resin as disclosed in Specification 1169692 and to which a final layer of glass cloth may be applied. Electrical apparatus having insulation including the mica tape or sheet may be formed by placing mica tape or sheet in contact with an electrically conducting part e.g. conductor, commutator or transformer part, impregnating the mica tape or sheet with a mixture of liquid bisphenol A epoxy resin and one or more cycloaliphatic resins and a curing agent e.g. hexahydrophthalic anhydride, and heating to cure the impregnating resin. There may be between 100 and 115 parts by weight of the curing agent to every 100 parts by weight of the mixture of liquid bisphenol A and one or more cycloaliphatic resins. Alternatively, the mica tape or sheet may be impregnated with the impregnating resin before it is applied to the conductor.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3133565A GB1169691A (en) | 1965-07-22 | 1965-07-22 | Improvements in or relating to Electrical Insulation |
| DE19661590351 DE1590351A1 (en) | 1965-07-22 | 1966-07-12 | Electrical insulating material and method of manufacture |
| CH1027966A CH494452A (en) | 1965-07-22 | 1966-07-15 | Mica impregnated with epoxy resin cycloaliphatic resin |
| BE684202D BE684202A (en) | 1965-07-22 | 1966-07-15 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3133565A GB1169691A (en) | 1965-07-22 | 1965-07-22 | Improvements in or relating to Electrical Insulation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1169691A true GB1169691A (en) | 1969-11-05 |
Family
ID=10321606
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3133565A Expired GB1169691A (en) | 1965-07-22 | 1965-07-22 | Improvements in or relating to Electrical Insulation |
Country Status (4)
| Country | Link |
|---|---|
| BE (1) | BE684202A (en) |
| CH (1) | CH494452A (en) |
| DE (1) | DE1590351A1 (en) |
| GB (1) | GB1169691A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2210326B (en) * | 1987-09-25 | 1991-11-13 | Shizuko Ueda | Composite fabrics arranged therein with natural materials |
| CN109155164A (en) * | 2016-04-15 | 2019-01-04 | 亨斯迈先进化工材料许可(瑞士)有限公司 | The improved resiniferous mica tape of richness |
-
1965
- 1965-07-22 GB GB3133565A patent/GB1169691A/en not_active Expired
-
1966
- 1966-07-12 DE DE19661590351 patent/DE1590351A1/en active Pending
- 1966-07-15 BE BE684202D patent/BE684202A/xx unknown
- 1966-07-15 CH CH1027966A patent/CH494452A/en not_active IP Right Cessation
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2210326B (en) * | 1987-09-25 | 1991-11-13 | Shizuko Ueda | Composite fabrics arranged therein with natural materials |
| CN109155164A (en) * | 2016-04-15 | 2019-01-04 | 亨斯迈先进化工材料许可(瑞士)有限公司 | The improved resiniferous mica tape of richness |
Also Published As
| Publication number | Publication date |
|---|---|
| BE684202A (en) | 1966-12-16 |
| DE1590351A1 (en) | 1970-04-16 |
| CH494452A (en) | 1970-07-31 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PLNP | Patent lapsed through nonpayment of renewal fees |