| 摘要 |
An organic, high-molecular weight polyester containing substantially chain members of the formula -O-X-O-Y- wherein X is at least one member selected from the group consisting of <IMAGE> and Y has the formula <IMAGE> having an inherent viscosity of at least 1.0 dl/g, preferably at least 1.2 dl/g measured at 30 DEG C. in a solution of 0.5 g of the polyester in 100 ml of a mixture of 60% by weight of phenol and 40% by weight of 1,1,2,2-tetrachloroethane and whose films cast from a solution in a chlorinated organic solvent have an elongation at break of more than about 20%, preferably at least 40% measured according to ASTM D 882-75 b having excellent properties for electrical insulation as well as other fields.
|
