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:
Feb. 18, 1992
Filed:
May. 25, 1989
Applicant:
Inventors:
Alan K Schrock, Lake Jackson, TX (US);
William J Harris, Midland, MI (US);
Norman L Madison, Midland, MI (US);
Assignee:
The Dow Chemical Company, Midland, MI (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08F / ; C08F / ; C08G / ;
U.S. Cl.
CPC ...
528185 ; 528176 ; 528183 ; 548217 ; 548577 ;
Abstract
A biscyclobutarene monomer is prepared comprising two cyclobutarene moieties bridged by a divalent radical having at least one benzoxazole, benzothiazole or benzimidazole linkage. A reactive biscyclobutarene oligomer is also prepared by reacting a cyclobutarene-carboxylic acid, a diaminodihydroxyarene, diaminodithiolarene or tetraaminoarene and either an aromatic diacid or an aromatic diacid chloride. the monomers and reactive oligomers can be polymerized to form polymers exhibiting outstanding thermooxidative stability at high temperatures for prolonged time periods.