GB807296A - Improved insulation for electrical conductors and method of preparing same - Google Patents
Improved insulation for electrical conductors and method of preparing sameInfo
- Publication number
- GB807296A GB807296A GB5799/57A GB579957A GB807296A GB 807296 A GB807296 A GB 807296A GB 5799/57 A GB5799/57 A GB 5799/57A GB 579957 A GB579957 A GB 579957A GB 807296 A GB807296 A GB 807296A
- Authority
- GB
- United Kingdom
- Prior art keywords
- tape
- butyl
- coated
- silicone rubber
- viscosity
- 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
- 238000009413 insulation Methods 0.000 title abstract 4
- 239000004020 conductor Substances 0.000 title abstract 3
- 238000000034 method Methods 0.000 title 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract 6
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 abstract 4
- 229920002379 silicone rubber Polymers 0.000 abstract 4
- 239000004945 silicone rubber Substances 0.000 abstract 4
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 abstract 3
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 abstract 3
- -1 siloxane units Chemical group 0.000 abstract 3
- OMPJBNCRMGITSC-UHFFFAOYSA-N Benzoylperoxide Chemical class C=1C=CC=CC=1C(=O)OOC(=O)C1=CC=CC=C1 OMPJBNCRMGITSC-UHFFFAOYSA-N 0.000 abstract 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 abstract 2
- 229910000019 calcium carbonate Inorganic materials 0.000 abstract 2
- 239000003517 fume Substances 0.000 abstract 2
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 abstract 2
- 239000000377 silicon dioxide Substances 0.000 abstract 2
- BOOBDAVNHSOIDB-UHFFFAOYSA-N (2,3-dichlorobenzoyl) 2,3-dichlorobenzenecarboperoxoate Chemical compound ClC1=CC=CC(C(=O)OOC(=O)C=2C(=C(Cl)C=CC=2)Cl)=C1Cl BOOBDAVNHSOIDB-UHFFFAOYSA-N 0.000 abstract 1
- 125000003903 2-propenyl group Chemical group [H]C([*])([H])C([H])=C([H])[H] 0.000 abstract 1
- 239000004342 Benzoyl peroxide Substances 0.000 abstract 1
- 239000005909 Kieselgur Substances 0.000 abstract 1
- 239000004965 Silica aerogel Substances 0.000 abstract 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 abstract 1
- 239000005864 Sulphur Substances 0.000 abstract 1
- 125000004429 atom Chemical group 0.000 abstract 1
- 125000003236 benzoyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C(*)=O 0.000 abstract 1
- 235000019400 benzoyl peroxide Nutrition 0.000 abstract 1
- 125000004432 carbon atom Chemical group C* 0.000 abstract 1
- 239000003054 catalyst Substances 0.000 abstract 1
- KPUWHANPEXNPJT-UHFFFAOYSA-N disiloxane Chemical class [SiH3]O[SiH3] KPUWHANPEXNPJT-UHFFFAOYSA-N 0.000 abstract 1
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 abstract 1
- 239000004744 fabric Substances 0.000 abstract 1
- 239000000945 filler Substances 0.000 abstract 1
- 239000011521 glass Substances 0.000 abstract 1
- 239000011810 insulating material Substances 0.000 abstract 1
- 125000000959 isobutyl group Chemical group [H]C([H])([H])C([H])(C([H])([H])[H])C([H])([H])* 0.000 abstract 1
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 abstract 1
- 239000000203 mixture Substances 0.000 abstract 1
- 238000000465 moulding Methods 0.000 abstract 1
- 125000004108 n-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 abstract 1
- 125000004123 n-propyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])* 0.000 abstract 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 abstract 1
- 230000001681 protective effect Effects 0.000 abstract 1
- 125000002914 sec-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])(*)C([H])([H])[H] 0.000 abstract 1
- GJBRNHKUVLOCEB-UHFFFAOYSA-N tert-butyl benzenecarboperoxoate Chemical compound CC(C)(C)OOC(=O)C1=CC=CC=C1 GJBRNHKUVLOCEB-UHFFFAOYSA-N 0.000 abstract 1
- SWAXTRYEYUTSAP-UHFFFAOYSA-N tert-butyl ethaneperoxoate Chemical compound CC(=O)OOC(C)(C)C SWAXTRYEYUTSAP-UHFFFAOYSA-N 0.000 abstract 1
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 abstract 1
- 239000002966 varnish Substances 0.000 abstract 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 abstract 1
- 229920002554 vinyl polymer Polymers 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/32—Windings characterised by the shape, form or construction of the insulation
- H02K3/34—Windings characterised by the shape, form or construction of the insulation between conductors or between conductor and core, e.g. slot insulation
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Insulating Of Coils (AREA)
- Manufacture Of Motors, Generators (AREA)
Abstract
An insulating material for wrapping electrical conductors comprises an unsupported silicone rubber tape which has been partially cured by heat to obtain the physical characteristics (a) the tape has non-tacky opposite surfaces, (b) the stress strain curve of the tape at room temperature persists with an upward slope from strain equals zero to strain equals 100 per cent, and (c) the partially cured tape will not rupture when stretched 100 per cent and then further heated to 200 DEG C. If desired the tape may be coated on one or both sides with an uncured silicone rubber paste. The preferred siloxane used for the silicone rubber tape is one having a viscosity of at least 106 cs. at 25 DEG C. and having from 1.9 to 2.0 organic radicals per Si atom, at least 50 mol. per cent of the siloxane units being (CH3)2 Si,O the remainder having the formula RR1SiO wherein R and R1 are each phenyl or an aliphatic hydrocarbon radical containing 1 to 4 C atoms, e.g. methyl, ethyl, vinyl, allyl, n-propyl, isopropyl, n-butyl, sec-butyl, iso-butyl and t-butyl. Fillers, e.g. fume silica, silica aerogel, diatomaceous earth, ferric oxide, calcium carbonate and titania, and curing catalysts, e.g. benzoyl and halogenated benzoyl peroxides, t-butyl perbenzoate, t-butyl-peracetate and sulphur may be added. In an example, a composition having a viscosity of 30 X 106 cs. at 25 DEG C. and composed of a dimethylsiloxane gum, fume silica, ferric oxide and benzoyl peroxide, was milled to a soft puttylike consistency and extruded in ribbon form. The ribbon or tape was partially cured by passing it through an air oven at 350 DEG C. and the resulting tape was then coated on both sides with a paste consisting of dimethylsiloxane having a viscosity of 35,000 cs. at 25 DEG C., calcium carbonate, ferric oxide and dichlorobenzoyl peroxide. Shaped conductors, such as coils, with strand insulation and turn insulation in place were stretch wrapped with the coated tape and covered with a protective wrapping, e.g. glass or other fabric, which may be coated or impregnated with varnish or silicone rubber. The insulation was compacted, e.g. by means of clamps and moulding strips, and briefly cured, e.g. by passing an electric current through the coil or by baking in an oven, to set the paste. The insulated coil was then heat cured after removal of the compacting means.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US807296XA | 1956-02-29 | 1956-02-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB807296A true GB807296A (en) | 1959-01-14 |
Family
ID=22159242
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB5799/57A Expired GB807296A (en) | 1956-02-29 | 1957-02-20 | Improved insulation for electrical conductors and method of preparing same |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB807296A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0287814A1 (en) * | 1987-03-24 | 1988-10-26 | Asea Brown Boveri Ab | Electrical insulating material comprising an insulating layer of an organic polymer |
-
1957
- 1957-02-20 GB GB5799/57A patent/GB807296A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0287814A1 (en) * | 1987-03-24 | 1988-10-26 | Asea Brown Boveri Ab | Electrical insulating material comprising an insulating layer of an organic polymer |
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