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Carboxy-terminated copolymers of isoprene and vinyl ferrocene

  • US 3,886,191 A
  • Filed: 07/08/1970
  • Issued: 05/27/1975
  • Est. Priority Date: 07/08/1970
  • Status: Expired due to Term
First Claim
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1. THE CARBOXY TERMINATED-COPOLYMERS OF ISOPRENE AND VINYL FERROCENE PREPARED BY THE METHOD COMPRISING REACTING VINYL FERROCENE AND A SUITABLE POLYMERIZATION INITATOR IN AN INERT ORGANIC SOLVENT WITH ISOPRENE AT A REACTION TEMPERATURE AND FOR A REACTION TIME PERIOD SUFFICIENT FOR SAID REACTION TO TAKE PLACE AFTER WHICH SOLVENT REMOVAL IS EFFECTED AND SAID COPOLYMERS ARE DRIED AT A SUITABLE DRYING TEMPERATURE WHILE UNDER REDUCED PRESSURE;

  • SAID SUITABLE POLYMERIZATION INITATOR BEING 4,4'"'"''"'"'-AZOBIS(4-CYANOVALERIC ACID);

    SAID INERT ORGANIC SOLVENT BEING SELECTED FROM DIOXANE AND TOLUENE;

    SAID REACTION TEMPERATURE BEING IN THE RANGE OF ABOUT 60*C TO ABOUT 80*C;

    SAID REACTION TIME BEING FROM ABOUT 24 HOURS TO ABOUT 120 HOURS;

    SAID DRYING IS ACCOMPLISHED AT A SUITABLE TEMPERATURE IN THE RANGE OF ABOUT 70*C TO ABOUT 75*C AND SAID REDUCED PRESSURE IS IN THE RANGE OF ABOUT 1 MILLIMETER;

    SAID REACTING ISOPRENE AND VINYL FERROCENE IN MOLE RATIOS FROM APPROXIMATELY 100;

    1 TO 1;

    1 TO FORM SAID COPOLYMERS CHARACTERIZED BY A MOLECULAR WEIGHT IN THE RANGE FROM ABOUT 1000 TO ABOUT 10,000, CARBOXY-END GROUP CONTENT OF ABOUT 0.5 WEIGHT PERCENT TO ABOUT 9 WEIGHT PERCENT, AND AN IRON CONTENET OF ABOUT 0.5 WEIGHT PERCENT TO ABOUT 15 WEIGHT PERCENT.

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