Carboxy-terminated copolymers of isoprene and vinyl ferrocene
First Claim
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.
0 Assignments
0 Petitions
Accused Products
Abstract
Copolymers of vinyl ferrocene (VF) and isoprene are disclosed along with preparative procedures therefor. The copolymers are produced in an organic solvent when polymerization is initiated by a carboxy-containing azo compound, such as, 4,4'"'"''"'"'-azobis(4cyanovaleric acid), thereby forming a copolymer of vinyl ferrocene and isoprene. The copolymers are useful in propellant formulations as a binder where high burning rates are desired.
-
Citations
1 Claim
-
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.
- SAID SUITABLE POLYMERIZATION INITATOR BEING 4,4'"'"''"'"'-AZOBIS(4-CYANOVALERIC ACID);
Specification