The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 14, 1986
Filed:
Oct. 07, 1985
Ronald E Myers, Strongsville, OH (US);
The B. F. Goodrich Company, Akron, OH (US);
Abstract
A chemical process is provided for forming an electrically conductive polymer blend in which polypyrrole is a minor component. The polypyrrole is formed from a pyrrole monomer, optionally substituted at the 3- and 4-positions. The process comprises forming a solution of a matrix polymer in an anhydrous liquid reaction medium, and, in situ, contacting pyrrole monomer with a polymerization initiator selected from the group consisting of anhydrous halides of iron, cobalt or nickel (Group VIII metal) at a temperature in the range from about -20.degree. C. to below about the boiling point of the solution, so as to form the polypyrrole in situ. The polypyrrole so formed contains a Group VIII metal halide counterion dispersed within the matrix polymer so as to produce a conductive polyblend having a conductivity in the range from about 1 to about 150 ohm.sup.-1 cm.sup.-1 ('S/cm' for brevity), or a semiconductor having a conductivity in the range from about 10.sup.-3 to abut 1 S/cm, depending upon the particular structures of the matrix polymer and the pyrrole monomer, the ratio of the initiator to pyrrole monomer, the order of addition of pyrrole monomer and initiator, and the molecular weight of the polypyrrole formed. The matrix polymer may be substituted with a polyblend which may contain two or more miscible or partially miscible polymers. The conductive polyblend formed retains such thermoformability of the matrix polymer as it had before it was made conductive by the in situ polymerization of the pyrrole monomer.