CARBOXY-TERMINATED BUTADIENE-VINYL FERROCENE COPOLYMERS

• US 3,886,190 A
• Filed: 12/07/1970
• Issued: 05/27/1975
• Est. Priority Date: 12/07/1970
• Status: Expired due to Term

• Current Assignee: Samuel F. Reed Jr
• Original Assignee: Samuel F. Reed Jr
• Inventors: Reed, Samuel F. Jr.
• Primary Examiner(s): Padgett, Benjamin R.
• Assistant Examiner(s): Miller, E. A.
• Application Number:
  US05/095,889
• Time in Patent Office: 1,632 Days
• Field of Search: 260/439CY,82.1
• US Class Current: 556/144
• CPC Class Codes: C06B 23/007 Ballistic modifiers, burning rate catalysts, burning rate depressing agents, e.g. for gas generating
• CPC Class Codes: C06B 45/10 the organic component containing a resin
• CPC Class Codes: C08F 236/04 conjugated

Abstract

Copolymers of butadiene and vinyl ferrocene (VF) 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, azobis(2-methyl-4carboxy butyronitrile), thereby forming a copolymer of butadiene and vinyl ferrocene. The copolymers are useful in propellant formulations as a binder where high buring rates are desired.

Claims

1. THE CARBOXY-TERMINATED COPOLYMERS OF BUTADIENE AND VNIYL FERROCENE PREPARED BY THE METHOD COMPRISING REACTING VINYL FERROCENE AND THE INITATOR AZOBIS(2-METHYL-4 CARBOXY BUTYRONITRILE) IN AN INERT ORGANIC SOLVENT WITH BUTADIENE 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 INERT ORGANIC SOLVENT BEING SELECTED FROM DIOXANE AND TOLUENE;

SAID REACTION TEMPERATURE BEING IN THE RANGE OF ABOUT 60* 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* TO ABOUT 75*C;

SAID REDUCED PRESSURE IS IN THE RANGE OF ABOUT 1 MILLIMETER;

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

1 TO 1;

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