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:
Jun. 07, 1988
Filed:
Nov. 03, 1986
Applicant:
Inventors:
Robert C Sentman, Macedonia, OH (US);
Benedict S Curatolo, Maple Heights, OH (US);
Gerald P Coffey, Lyndhurst, OH (US);
Assignee:
The Standard Oil Company, Cleveland, OH (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C08G / ;
U.S. Cl.
CPC ...
528336 ; 528312 ; 528313 ; 528319 ;
Abstract
The process for manufacturing a nylon-type polyamide from a dinitrile, a diamine and water in the presence of a catalyst is improved by using as a catalyst an ester of oxygenated phosphorus compound in conjunction with a strong base. For example, high quality nylon-6,6 is manufactured by contacting adiponitrile, hexamethylene diamine and water with an ester of an oxygenated phosphorous compound and sodium hydroxide at an elevated temperature and pressure.