Phosphorus-containing thermoplastic poly(ether-sulfones)
Abstract
Abstract PHOSPHORUS-CONTAINING THERMOPLASTIC POLY(ETHER-SULFONE) CONDENSATION POLYMERS HAVING A BACKBONE CHAIN OF THE FORMULA -(O-(AR-1,4-PHENYLENE)-C(-R1)(-R2)-(A''S-1,4-PHENYLENE)-O- (1,4-PHENYLENE)-SO2-(1,4-PHENYLENE))N- WHEREIN R1 AND R2 ARE H, ALKYL OR PHENYL, PROVIDED ONLY ONE OF R1 AND R2 IS H, A AND A'' ARE MEMBERS SELECTED FROM THE GROUP CONSISTING OF PCL2, -PCL4, -P(OX)2 AND -PO(OX)2 WHEREIN X IS H OR AN ALKALI METAL, N IS AN INTEGER OF AT LEAST 30, AND R AND S ARE 0 OR 1, WITH THE PROVISO THAT THE RATIO OF R+S/N IS BETWEEN 0.2 AND 2, HAVE IMPROVED RESISTANCE TO ATTACK BY SOLVENTS AND TO ENVIRONMENTAL STRESS-CRACKING, AS COMPARED TO THE BASIC POLY(ETHER-SULFONE) FROM WHICH THEY ARE PREPARED.
Inventors
- 👤 G Khattab
Bibliographic Details
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