Semi-aromatic polyamide preparation method
AssigneeArkema France
InventorsNicolas ALZONNE, Thierry BRIFFAUD
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Abstract
An industrial method for preparing a semi-aromatic copolyamide having a general formula A/10.T, wherein: A denotes a unit obtained by polycondensing a lactam or a C9-C12 amino acid; and 10.T denotes a unit obtained by polycondensing 1.10-decanediamine and terephtalic acid. The method includes a step for polycondensing the comonomers, the amino acid or the lactam, 1.10-decanediamine and terephtalic acid in the presence of at least one C1-C7 linear aliphatic acid. The level of foaming in a reactor is substantially reduced, during the polycondensation step, in relation to the level observed without C1-C7 linear aliphatic acid.
Claims15
An industrial process for preparing a semiaromatic copolyamide of general formula A/10.T in which
- A denotes a unit obtained from the polycondensation of a lactam or of a C9-C12 amino acid,
- 10.T denotes a unit obtained from the polycondensation of 1,10-decanediamine and terephthalic acid,
- wherein the process comprises a step of polycondensation of the comonomers:
- the amino acid or the lactam, 1,10-decanediamine and terephthalic acid, in the presence of at least one linear C1-C7 aliphatic acid in a reactor, the level of foaming in the reactor being substantially reduced during the polycondensation step relative to the level observed without the linear C1-C7 aliphatic acid.
Dependencies are inferred from the claim text.