发明名称 |
METHOD FOR PRODUCING POLYAMIDE |
摘要 |
A method of producing polyamide by the direct polycondensation of a diamine component and a dicarboxylic acid component without using a solvent, such as water. The diamine component containing 70 mol % or more of p-xylylenediamine is added to a reaction system containing the dicarboxylic acid component under pressure while maintaining the reaction system in a molten state. After the addition of the diamine component, the pressure of the reaction system is reduced to atmospheric pressure over 50 min or more at a pressure falling speed of 1.0 MPa/h or less. By the production method, polyamide with a small molecular weight dispersion is easily produced. |
申请公布号 |
KR20110084157(A) |
申请公布日期 |
2011.07.21 |
申请号 |
KR20117006191 |
申请日期 |
2009.09.11 |
申请人 |
MITSUBISHI GAS CHEMICAL COMPANY, INC. |
发明人 |
KUWAHARA HISAYUKI;KANDA TOMOMICHI;OGAWA SHUN;AYUBA SHINICHI;ISHII KENTARO;SUMINO TAKAHIKO |
分类号 |
C08G69/28;C08G69/30;C08L77/06 |
主分类号 |
C08G69/28 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|