Film forming polyesters from halogenated phenols and a mixture of isophthalic and terephthalic acid and electrical insulation of same
Abstract
Abstract THERMOSTABLE ELECTRICAL INSULATION SHEETS, FILMS, COATINGS AND IMPREGNATIONS MADE FROM POLYESTER POLYMERS OF THE GENERAL FORMULA -(CO-C6H4-COO-R-O)N- WHEREIN N IS A WHOLE NUMBER FROM 80 TO 300, PREFERABLY FROM 100 TO 255, AND R REPRESENTS A BIVALENT ORGANIC RADICAL WHICH CONTAINS TWO CHLORINATED PHENYLENE RADICALS, AND MAY CONTAIN, IF DESIRED, AN ALKYLENE GROUP, A SULFONYL GROUP OR AN OXYGEN ATOM BETWEEN THE TWO CHLORINATED PHENYLENE RADICALS. THE CHLORINATED PHENYLENE MOIETY MAY CONSTITUTE 1 TO 40 MOLE-PERCENT, OF THE POLYMER. ABOUT 20 TO 99%, AND PREFERABLY 30 TO 80%, OF THE CARBONYL ESTER GROUPS ON THE NON-CHLORINATED PHENYLENE RADICAL OF THE ABOVE FORMULA ARE IN THE META POSITION IN RELATION TO ONE ANOTHER, AND THE REST ARE IN THE PARA POSITION.
Inventors
- 👤 R Ismail
Bibliographic Details
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| 7.5 Years (Year 8) | 1980-10-15 | 1981-04-16 | 1981-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-15 | 1985-04-16 | 1985-10-16 | $7700.00 | Window Closed / Lapsed |