Linear elastic polymers
Abstract
Abstract WHEREIN A IS THE CENTRAL PORTION OF THE MOLECULE OF THE AFORESAID BIS-HYDRAZIDE AND Z REPRESENTS A DIVALENT ACYL RESIDUE OF THE AFORESAID SOFT SEGMENT FORMER OR THE CHAINEXTENDING GROUP -CO-Y-CO, THE FINAL POLYMER CONTAINING PER GROUP -CO-Y-CO, FROM 0.5 TO 5 OF THE DIVALENT ACYL RESIDUES OF THE SOFT SEGMENT FORMER WHICH ARE DISTURBED STATISTICALLY OVER THE WHOLE POLYMER. THESE NOVEL POLYMERS ARE USEFUL AS MATERIAL FOR FILAMENTS. FILMS AND PROTECTIVE COATINGS. -NH-NH-A-NH-NH-Z- LINEAR ELASTIC POLYMERS ARE PRODUCED FROM SOFT-SEGMENT FORMING LINEAR ALIPHATIC DICARBOXYLIC ACID DERIVATIVES OR BIS-CHLOROFORMATES OF MACROGLYCOLS HAVING A MOLECULAR WEIGHT IN THE RANGE OF FROM ABOUT 400 TO 5000 AND A MELTING POINT OF LESS THAN 70*C., BY CAPPING WITH CERTAIN BIS-HYDRAZIDES; AND REACTING THE RESULTING PREPOLYMERIC PRODUCT WITH, AS CHAIN EXTENDER, A BIFUNCTIONAL LOWMOLECULAR COMPOUND CONTAINING CERTAIN GROUPS WHICH ARE CAPABLE OF REACTING WITH THE HYDRAZIDE END GROUPS IN THE ENSUING POLYMERIZATION REACTION, WHEREBY CERTAIN ALIPHATIC, AROMATIC OR ARALIPHATIC DIVALENT RADICALS ARE INTRODUCED INTO THE POLYMER CHAIN. THE RESULTING POLYMERS ARE FORMED FROM A SEQUENCE OF RECURRING UNITS OF THE FORMULA
Inventors
- 👤 H Heller
- 👤 H Muller
- 👤 T Lyssy
- 👤 E Keller
Bibliographic Details
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