发明名称 |
Solid-phase drying and solid-phase polymerization of polyamide |
摘要 |
In the method for solid-phase drying or solid-phase polymerizing a polyamide of the present invention, the polyamide that is stored for 20 days or longer after the production thereof until subjected to the solid-phase drying or the solid-phase polymerization under the specific conditions is used as the starting material. By storing the polyamide under the specific conditions of the present invention, the resultant solid-phase dried or solid-phase polymerized polyamide with a low yellowness is obtained even if 20 days or more time has lapsed after the starting polyamide is produced until it is subjected to the solid-phase drying or solid-phase polymerization.
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申请公布号 |
US6693163(B2) |
申请公布日期 |
2004.02.17 |
申请号 |
US20020098056 |
申请日期 |
2002.03.15 |
申请人 |
MITSUBISHI GAS CHEMICAL COMPANY, INC. |
发明人 |
TANAKA KAZUMI;KUROSE HIDEYUKI |
分类号 |
C08G69/04;C08G69/06;C08G69/08;(IPC1-7):C08G69/04 |
主分类号 |
C08G69/04 |
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