| abstract |
POLYESTER POLYCARBONATE RESPONDING TO THE FORMULA: (CF DRAWING IN BOPI) IN WHICH ONE OF THE X AND Y IS HYDROGEN AND THE OTHER IS HYDROGEN, A RADICAL METHYL, CHLOROMETHYL OR ETHYL, R IS A DIVALENT GROUP OBTAINED BY REMOVING TERMINAL HYDROXYLES FROM AN ALKYLENE OR POLYALKYLENE GLYCOL HAVING A MOLECULAR MASS UP TO 600, Z IS A DIACYL RADICAL OF A CYCLIC ORGANIC ACID ANHYDRIDE IN CAC, AND M, N AND R ARE NUMBERS DE1 A5. APPLICATION TO THE MANUFACTURING OF POLYURETHANE AND POLYISOCYANURATE FOAMS. |