Process for producing polyamide
AssigneeMitsubishi Gas Chemical Company, Inc.
InventorsKazumi Tanaka, Hideyuki Kurose
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Abstract
The improved polyamide production method of the present invention is characterized by including a step of accurately regulating the molar balance between a diamine component and a dicarboxylic acid component to a desired balance in a batch-wise regulation tank, thereby preparing a slurry liquid substantially free from the amidation reaction. The slurry liquid thus prepared is fed to a batch-wise or continuous polymerization reactor, where the amidation reaction is proceeded to easily produce polyamide having a desired balance of the diamine component and the dicarboxylic acid component without causing a problem such as foaming, solidification, etc.
Claims16
A process for producing polyamide by polymerization of a diamine component comprising 80 mol % or more of xylylenediamine and a dicarboxylic acid component, comprising the steps of:
- feeding the diamine component to a batch-wise regulation tank after accurately measuring the mass of the diamine component;
- adding the dicarboxylic acid component to the liquid diamine component in the batch-wise regulation tank in an amount so as to attain a desired molar balance between the diamine component and the dicarboxylic acid component while stirring the liquid diamine component, thereby preparing a slurry liquid substantially free from amidation;
- and
- feeding the slurry liquid to a polymerization reactor as a starting material for the polyamide.
Dependencies are inferred from the claim text.