GB642817A - Improvements in electrically insulating coating compositions - Google Patents
Improvements in electrically insulating coating compositionsInfo
- Publication number
- GB642817A GB642817A GB1400048A GB1400048A GB642817A GB 642817 A GB642817 A GB 642817A GB 1400048 A GB1400048 A GB 1400048A GB 1400048 A GB1400048 A GB 1400048A GB 642817 A GB642817 A GB 642817A
- Authority
- GB
- United Kingdom
- Prior art keywords
- proportion
- partial
- weight
- polyhydric alcohol
- per cent
- 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
- H01B3/18—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
- H01B3/38—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 condensation products of aldehydes with amines or amides
Landscapes
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Paints Or Removers (AREA)
- Polyesters Or Polycarbonates (AREA)
Abstract
An electrical insulating coating composition is made by heating an aliphatic a ,o -dibasic acid with a polyhydric alcohol containing not more than four hydroxyl groups to effect partial condensation, heating the partial condensate with hexamethylenetetramine or with ammonia and formaldehyde to effect further condensation and dissolving the product in an organic solvent. The partial condensation may be effected between 180 DEG and 200 DEG C. and the further condensation between 220 DEG and 240 DEG C. Reactants specified are: adipic and sebacic acids; glycerol, glycols and pentaerythritol; solvents: mixtures of butanol and tetrahydrofuran, preferably in proportion by weight of 1 : 6, and butanol, ethanol and xylene, preferably in proportion by weight of 3 : 2 : 5. Preferably the proportion by weight of hexamethylenetetramine is between 5 and 55 per cent, the dibasic acid is between 15 and 65 per cent and the polyhydric alcohol is between 5 and 45 per cent, the most suitable proportions of the specific reactants being indicated in triangular diagrams (not shown). According to the Provisional Specification any polyhydric alcohol may be used to form the partial polyester.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1400048A GB642817A (en) | 1948-05-24 | 1948-05-24 | Improvements in electrically insulating coating compositions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1400048A GB642817A (en) | 1948-05-24 | 1948-05-24 | Improvements in electrically insulating coating compositions |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB642817A true GB642817A (en) | 1950-09-13 |
Family
ID=10033187
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1400048A Expired GB642817A (en) | 1948-05-24 | 1948-05-24 | Improvements in electrically insulating coating compositions |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB642817A (en) |
-
1948
- 1948-05-24 GB GB1400048A patent/GB642817A/en not_active Expired
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