PROCESSES FOR PRODUCING AQUEOUS DIAMINE DICARBOXYLIC ACID SALT SOLUTION AND POLYAMIDE

WIPO Patent Application WO/2011/162350

A1

Provided are: a process for producing a high-quality aqueous solution of a diamine dicarboxylic acid salt by simple and easy steps; and a process for producing a polyamide. The process for producing a high-quality aqueous solution of a diamine dicarboxylic acid salt includes a step of mixing a dicarboxylic acid diester with a diamine, with the mixing ratio of the diamine to the dicarboxylic acid diester being 1.005 or more by mole. The process for producing a polyamide includes a step of mixing a dicarboxylic acid diester with a diamine and heating the formed aqueous solution of a diamine dicarboxylic acid salt to conduct the polycondensation of the diamine with the dicarboxylic acid, with the mixing ratio of the diamine to the dicarboxylic acid diester being 1.005 or more by mole.

WO/2007/060976	NOVEL ASCOCHLORIN DERIVATIVE COMPOUNDS AND MEDICINAL COMPOSITIONS CONTAINING THE SAME
JP2002308819	METHOD FOR PRODUCING CAPROIC ACID FROM CELLULOSE AND METHOD FOR RECYCLING CELLULOSE AS RESOURCES

NITTO YU (JP)
NAGAHARA HAJIME (JP)

PCT/JP2011/064448

December 29, 2011

June 23, 2011

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ASAHI KASEI CHEMICALS CORP (JP)
NITTO YU (JP)
NAGAHARA HAJIME (JP)

C07C51/09; C07C61/09; C07C63/26; C07C209/68; C07C211/09; C07C211/12

WO2002048239A1	2002-06-20
WO2010117098A2	2010-10-14

JP2001519447A	2001-10-23
JPH02129225A	1990-05-17
JPS5780426A	1982-05-20

INABA, Yoshiyuki et al. (JP)
Yoshiyuki Inaba (JP)

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