| abstract |
COMPOSITION WHICH CAN BE CONVERTED TO RUBBER-ELASTIC PLASTIC PRODUCTS ON WARMING, CHARACTERISED IN THAT THEY CONTAIN LONG-CHAIN POLYESTER-POLYAMIDE-DICARBOXYLIC ACIDS OF FORMULA HO-(CO-R1-NH)N-CO-A-CO-(NH-R1-CO)B-OH WHEREINE R1 REPRESENT A BRANCHED OR UNBRANCHED ALKYLENE RESIUDE HAVING 2 TO 11 CARBON ATOMS IN THE LINAR CHAIN, PREFERABLY THE PENTAMETHYLENE RESIUDE, AND A AND B DENOTE ZERO OR AN INTER, WITH THE SUM (A+B) BEING AT LEAST 1 AND AT MOST 8, AND WHEREIN A DENOTES A BRANCHED OR UNBRANCHED HYDROCARBON CHAIN INTERRUPTED BY AT LEAST TWO ESTER GROUPS -O-COWHEREIN, IN THE STRUCTURAL UNIT OF THE POLYESTER RESIDUE A, THE NUMBER OF CARBON ATOMS IN HYDROCARBON RESIDUES DIVIDED BY THE NUMBER OF OXYGEN BRIDGES IS 3 TO 32, WHEREIN FURTHERMORE THE TOTAL NUMBER OF CARBON ATOMS PRESENT IN HYDROCARBON RESIDUES IN THE RESIUDE A IS AT LEAST 10, AND WHEREIN AT LEAST 1.0 AND A MOST 7.0 EQUIVALENTS OF AMIDE GROUPS PER KG. ARE PRESENT IN THE POLYESTER-POLYAMIDE-DICARBOXYLIC ACID MENTIONED, AND ALSO DIEPOXIDE COMPOUNDS, WITH 0.6 TO 1.2, PREFERABLY 0.8 TO 1.0, EQUIVALENTS OF CARBOXYL GROUPS BEING PRESENT PER 1 EQUIVALENT OF EPOXIDE GROUPS. |