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:
Mar. 12, 2019
Filed:
May. 08, 2015
Mitsubishi Gas Chemical Company, Inc., Tokyo, JP;
Mitsubishi Gas Chemical Company, Inc., Tokyo, JP;
Abstract
A method for producing a polyamide, comprising performing melt polycondensation of a diamine component comprising xylylenediamine in an amount of 70 mol % or more and a dicarboxylic acid component comprising a linear aliphatic dicarboxylic acid having 6 to 18 carbon atoms in an amount of 70 mol % or more in the presence of a phosphorus atom-containing compound (A), wherein the decomposition temperature of the phosphorus atom-containing compound (A) is not lower than the melting point of the polyamide, and an aqueous solution of the phosphorus atom-containing compound (A) and the diamine component are added to the dicarboxylic acid component being in a molten state to perform the melt polycondensation.