GB599097A - Improvements in or relating to electrical insulation - Google Patents
Improvements in or relating to electrical insulationInfo
- Publication number
- GB599097A GB599097A GB2360245A GB2360245A GB599097A GB 599097 A GB599097 A GB 599097A GB 2360245 A GB2360245 A GB 2360245A GB 2360245 A GB2360245 A GB 2360245A GB 599097 A GB599097 A GB 599097A
- Authority
- GB
- United Kingdom
- Prior art keywords
- solvent
- ester
- films
- polyester
- filaments
- 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
- 238000010292 electrical insulation Methods 0.000 title 1
- 239000000463 material Substances 0.000 abstract 5
- 229920000728 polyester Polymers 0.000 abstract 5
- 239000002904 solvent Substances 0.000 abstract 5
- 239000004020 conductor Substances 0.000 abstract 4
- 150000002148 esters Chemical class 0.000 abstract 4
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 abstract 3
- QWVGKYWNOKOFNN-UHFFFAOYSA-N O-Cresol Chemical compound CC1=CC=CC=C1O QWVGKYWNOKOFNN-UHFFFAOYSA-N 0.000 abstract 2
- 238000010438 heat treatment Methods 0.000 abstract 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 abstract 2
- OKKJLVBELUTLKV-UHFFFAOYSA-N methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 abstract 2
- QPFMBZIOSGYJDE-UHFFFAOYSA-N 1,1,2,2-Tetrachloroethane Chemical compound ClC(Cl)C(Cl)Cl QPFMBZIOSGYJDE-UHFFFAOYSA-N 0.000 abstract 1
- OWBTYPJTUOEWEK-UHFFFAOYSA-N 2,3-Butanediol Chemical compound CC(O)C(C)O OWBTYPJTUOEWEK-UHFFFAOYSA-N 0.000 abstract 1
- MVPPADPHJFYWMZ-UHFFFAOYSA-N Chlorobenzene Chemical compound ClC1=CC=CC=C1 MVPPADPHJFYWMZ-UHFFFAOYSA-N 0.000 abstract 1
- WOZVHXUHUFLZGK-UHFFFAOYSA-N Dimethyl terephthalate Chemical compound COC(=O)C1=CC=C(C(=O)OC)C=C1 WOZVHXUHUFLZGK-UHFFFAOYSA-N 0.000 abstract 1
- 239000004677 Nylon Substances 0.000 abstract 1
- KKEYFWRCBNTPAC-UHFFFAOYSA-N Terephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 abstract 1
- 239000010425 asbestos Substances 0.000 abstract 1
- 239000011248 coating agent Substances 0.000 abstract 1
- 238000000576 coating method Methods 0.000 abstract 1
- 150000001896 cresols Chemical class 0.000 abstract 1
- 239000006185 dispersion Substances 0.000 abstract 1
- 238000001704 evaporation Methods 0.000 abstract 1
- 239000004744 fabric Substances 0.000 abstract 1
- 239000011521 glass Substances 0.000 abstract 1
- LYCAIKOWRPUZTN-UHFFFAOYSA-N glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 abstract 1
- 150000002334 glycols Chemical class 0.000 abstract 1
- 239000000395 magnesium oxide Substances 0.000 abstract 1
- 239000000155 melt Substances 0.000 abstract 1
- 239000011490 mineral wool Substances 0.000 abstract 1
- 239000000203 mixture Substances 0.000 abstract 1
- 229920001778 nylon Polymers 0.000 abstract 1
- 239000002245 particle Substances 0.000 abstract 1
- 239000003209 petroleum derivative Substances 0.000 abstract 1
- 150000002989 phenols Chemical class 0.000 abstract 1
- 229920000573 polyethylene Polymers 0.000 abstract 1
- 229910052895 riebeckite Inorganic materials 0.000 abstract 1
- -1 silk Substances 0.000 abstract 1
- 150000003739 xylenols Chemical class 0.000 abstract 1
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
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
- H01B3/42—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes polyesters; polyethers; polyacetals
- H01B3/421—Polyesters
- H01B3/422—Linear saturated polyesters derived from dicarboxylic acids and dihydroxy compounds
- H01B3/423—Linear aromatic polyesters
Landscapes
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Organic Insulating Materials (AREA)
- Insulated Conductors (AREA)
Abstract
An electrical conductor is insulated with a covering consisting wholly or partly of one or more highly polymeric linear esters from glycols of the series OH(CH2)nOH wherein n is an integer greater than 1 but less than 10 and terephthalic acid or ester-forming derivatives thereof. Such esters are described in Specification 578,079. A film or successive films of ester may be deposited by drawing the conductor through a solution thereof in a solvent such as ortho-cresol, cresylic acid, xylenols, a solution of phenol in cresols or mixtures of phenols with tetrachlorethane or monochlorbenzene and evaporating the solvent, or a dispersion of the ester in a non-solvent, e.g. a volatile petroleum hydrocarbon or a latent solvent may be employed, subsequent heat treatment fusing the particles of polyester to form a continuous coating; or the molten polyester, if desired, with a little solvent to lower the melting-point may be extruded to yield the insulating covering; or the conductors may be wrapped with filaments, films, yarns, fabrics, tape, ribbons or films formed of the polyesters and/or of other materials coated or impregnated with the polyesters. Twistless yarns, (see Group IX), are particularly useful. The filaments or similar materials may be combined with similar materials formed for example from cellulosic material, silk, nylon, polythene, spun glass, asbestos, p or mineral wool. The wrapped conductors may be heated to fuse some or all of the materials used in the coatings. Examples are given employing a polyester obtained by heating dimethyl terephthalate, and ethylene glycol in presence of magnesium oxide and in an inert atmosphere at 197 DEG C. for 4 hours. Methanol distilled off. Excess glycol was then distilled off at higher temperature and lower pressure. The melt was extruded from the reaction vessel.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB599097A true GB599097A (en) | 1948-03-04 |
Family
ID=1737783
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2360245A Expired GB599097A (en) | 1945-09-13 | Improvements in or relating to electrical insulation |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB599097A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3014980A (en) * | 1959-04-13 | 1961-12-26 | Gen Electric | Insulation systems |
| US3019285A (en) * | 1958-12-03 | 1962-01-30 | Porter Co Inc H K | Electrical cable with protecting layer of polyethylene terephthalate |
| US3048651A (en) * | 1957-08-02 | 1962-08-07 | Gen Electric | Insulated coil and method of making same |
| US3222219A (en) * | 1961-11-29 | 1965-12-07 | Phelps Dodge Copper Prod | Ceramic-coated electrically-conductive wire and method of making same |
| US3296335A (en) * | 1961-11-10 | 1967-01-03 | Chemische Werke Witten Gmbh | Process for providing electrically insulated conductors and coating composition for same |
| US3374201A (en) * | 1964-03-13 | 1968-03-19 | Goodyear Tire & Rubber | Polyesters from a mixture of different aromatic dicarboxylic acids |
| DE1297266B (en) * | 1965-02-18 | 1969-06-12 | Ici Ltd | Matt lacquer |
| US4406851A (en) * | 1979-09-01 | 1983-09-27 | Harald Janssen | Process for the manufacture of insulated winding wires through extrusion of thermoplastics |
| US4624718A (en) * | 1985-11-08 | 1986-11-25 | Essex Group, Inc. | Polyester-polyamide tape insulated magnet wire and method of making the same |
| US4868035A (en) * | 1988-05-16 | 1989-09-19 | Weinberg Martin J | Electrical insulating materials made partly or wholly of polyester film |
-
1945
- 1945-09-13 GB GB2360245A patent/GB599097A/en not_active Expired
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3048651A (en) * | 1957-08-02 | 1962-08-07 | Gen Electric | Insulated coil and method of making same |
| US3019285A (en) * | 1958-12-03 | 1962-01-30 | Porter Co Inc H K | Electrical cable with protecting layer of polyethylene terephthalate |
| US3014980A (en) * | 1959-04-13 | 1961-12-26 | Gen Electric | Insulation systems |
| US3296335A (en) * | 1961-11-10 | 1967-01-03 | Chemische Werke Witten Gmbh | Process for providing electrically insulated conductors and coating composition for same |
| US3222219A (en) * | 1961-11-29 | 1965-12-07 | Phelps Dodge Copper Prod | Ceramic-coated electrically-conductive wire and method of making same |
| US3374201A (en) * | 1964-03-13 | 1968-03-19 | Goodyear Tire & Rubber | Polyesters from a mixture of different aromatic dicarboxylic acids |
| DE1297266B (en) * | 1965-02-18 | 1969-06-12 | Ici Ltd | Matt lacquer |
| US4406851A (en) * | 1979-09-01 | 1983-09-27 | Harald Janssen | Process for the manufacture of insulated winding wires through extrusion of thermoplastics |
| US4624718A (en) * | 1985-11-08 | 1986-11-25 | Essex Group, Inc. | Polyester-polyamide tape insulated magnet wire and method of making the same |
| US4868035A (en) * | 1988-05-16 | 1989-09-19 | Weinberg Martin J | Electrical insulating materials made partly or wholly of polyester film |
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