发明名称 |
método de produção de poliamida |
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 |
BRPI0918857(A2) |
申请公布日期 |
2015.12.01 |
申请号 |
BR2009PI18857 |
申请日期 |
2009.09.11 |
申请人 |
MITSUBISHI GAS CHEMICAL COMPANY, INC. |
发明人 |
HISAYUKI KUWAHARA;KENTARO ISHII;SHINICHI AYUBA;SHUN OGAWA;TAKAHIKO SUMINO;TOMOMICHI KANDA |
分类号 |
C08G69/28 |
主分类号 |
C08G69/28 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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