GB587160A - Improvements in or relating to synthetic resins for use in producing electrical insulation - Google Patents
Improvements in or relating to synthetic resins for use in producing electrical insulationInfo
- Publication number
- GB587160A GB587160A GB7069/44A GB706944A GB587160A GB 587160 A GB587160 A GB 587160A GB 7069/44 A GB7069/44 A GB 7069/44A GB 706944 A GB706944 A GB 706944A GB 587160 A GB587160 A GB 587160A
- Authority
- GB
- United Kingdom
- Prior art keywords
- electrical insulation
- per cent
- resinous
- resin
- reaction
- 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
- H01B3/002—Inhomogeneous material in general
-
- 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
- H01B3/425—Non-saturated polyesters derived from polycarboxylic acids and polyhydroxy compounds, in which at least one of the two components contains aliphatic unsaturation
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R39/00—Rotary current collectors, distributors or interrupters
- H01R39/02—Details for dynamo electric machines
- H01R39/04—Commutators
Landscapes
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Inorganic Insulating Materials (AREA)
Abstract
A material for use as electrical insulation or as a binder for mica flakes or other dielectric sheet or flake material to make electrical insulation is the resinous reaction product of 1 mol. of pentaerythritol, 1.5 mols. of maleic acid or anhydride (plus or minus 10 per cent) and 0.5 mols. of phthalic acid or anhydride (plus or minus 10 per cent). The materials are charged into a vessel equipped with reflux condenser and heated to 130 DEG C. in an atmosphere of carbon-dioxide or nitrogen. The temperature then rises rapidly due to reaction. Reaction is continued until an acid number of 220-280 is reached. The product should have a ball and tapered ring softening point of 50-80 DEG C. It is thermoplastic, but sets if treated at temperatures of 150-200 DEG C. It is soluble in acetone, ethanol, acetone-benzene, or ethanol-benzene. A solution containing 2-25 per cent by weight of resin is suitable for application to mica flakes. Flat sheets suitable for punching or cutting commutator or similar simply shaped insulation may be made with the aid of the resin (see Group V). Mica flakes mixed with resinous binder may also be moulded to specific shapes such as a V-ring for a dynamo-electric machine (see Group XXXV). When moulding the pentaerthyritol-maleate-phthalate resin, fillers such as silica, asbestos fibres or porcelain particles may be incorporated therewith. Synthetic mica or films of treated bentonite may also be cemented with the resinous material.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US587160XA | 1943-04-17 | 1943-04-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB587160A true GB587160A (en) | 1947-04-16 |
Family
ID=22018474
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB7069/44A Expired GB587160A (en) | 1943-04-17 | 1944-04-17 | Improvements in or relating to synthetic resins for use in producing electrical insulation |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB587160A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE951888C (en) * | 1951-07-11 | 1956-11-08 | Atlas Powder Co | Storable structures made of glass fibers and unsaturated polyester resins which can be hardened under the action of pressure and heat |
| CN114163777A (en) * | 2022-02-11 | 2022-03-11 | 浙江荣泰电工器材股份有限公司 | Mica composite material of internal-added short fibers for new energy automobile and preparation process |
-
1944
- 1944-04-17 GB GB7069/44A patent/GB587160A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE951888C (en) * | 1951-07-11 | 1956-11-08 | Atlas Powder Co | Storable structures made of glass fibers and unsaturated polyester resins which can be hardened under the action of pressure and heat |
| CN114163777A (en) * | 2022-02-11 | 2022-03-11 | 浙江荣泰电工器材股份有限公司 | Mica composite material of internal-added short fibers for new energy automobile and preparation process |
| CN114163777B (en) * | 2022-02-11 | 2022-06-28 | 浙江荣泰电工器材股份有限公司 | Mica composite material of internal-added short fibers for new energy automobile and preparation process |
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