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:
Aug. 11, 1992
Filed:
Sep. 01, 1989
Applicant:
Inventor:
Sajal Das, Basking Ridge, NJ (US);
Assignee:
Allied-Signal Inc., Morristown, NJ (US);
Primary Examiner:
Int. Cl.
CPC ...
C08G / ;
U.S. Cl.
CPC ...
525504 ; 525390 ; 525480 ;
Abstract
The present invention is directed to a process of preparing a cyanato group containing phenolic resin by reacting the corresponding phenolic resin with a tertiary amine in a water immiscible, non-hydrogen bonding solvent at a temperature of preferably less than about 25.degree. C. to form the corresponding ammonium salt of the phenolic resin; and reacting the ammonium salt with a cyanogen halide at a temperature equal to or less than about 0.degree. C. in said solvent to form the cyanato containing phenolic resin.