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. 21, 1984
Filed:
Jun. 01, 1982
Applicant:
Inventors:
Akira Miyamoto, Kanagawa, JP;
Senzo Shimizu, Kanagawa, JP;
Kazuo Yamamiya, Kanagawa, JP;
Masahiro Harada, Kanagawa, JP;
Assignee:
Mitsubishi Gas Chemical Company Inc., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G / ;
U.S. Cl.
CPC ...
528347 ; 528335 ; 528339 ; 528340 ;
Abstract
A process for preparing a polyamide is provided. The polyamide is prepared by effecting direct polycondensation reaction of a dicarboxylic acid component containing at least 80 mole % of adipic acid and a diamine component containing at least 70 mole % of m-xylylene diamine under an atmosphere of an inert gas and at atmospheric pressure at a controlled temperature which is higher than the melting point of the dicarboxylic acid component and which can maintain the reaction mixture in a uniformly-fluidized state throughout the reaction.