Process for modifying aliphatic polyamides with polyurea

Details Process for modifying aliphatic polyamides with polyurea Process for modifying aliphatic polyamides with polyurea

C - Chemistry, Metallurgy

08

G

C08G 69/48 (2006.01) C08G 81/00 (2006.01) C08L 77/00 (2006.01) C08L 77/02 (2006.01) C08L 77/06 (2006.01) D01F 6/60 (2006.01)

Patent

CA 2234343

The end groups of an aliphatic polyamide may be changed by reacting a polyurea with a molten aliphatic polyamide at temperatures of about 260 °C or more. Carboxyl end groups are controllably converted to amine end groups. This is especially useful for controlling the dyeability of fibers spun from such aliphatic polyamides.

On peut changer les groupements terminaux d'un polyamide aliphatique en faisant réagir une polyurée avec un polyamide aliphatique en fusion, à des températures d'environ 260 DEG C ou supérieures. Les groupements terminaux carboxyliques sont convertis, de manière régulable, en groupements terminaux amines. Cela est particulièrement utile pour maîtriser l'aptitude à la teinture de fibres filées à partir de tels polyamides aliphatiques.

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