Process for increasing the molecular weight of polyamides

Details Process for increasing the molecular weight of polyamides Process for increasing the molecular weight of polyamides

C - Chemistry, Metallurgy

08

G

C08G 69/48 (2006.01) C08G 69/02 (2006.01) C08G 69/04 (2006.01) C08G 69/16 (2006.01) C08G 69/18 (2006.01) C08G 69/28 (2006.01) C08K 5/098 (2006.01) C08K 5/109 (2006.01) C08K 5/49 (2006.01)

Patent

CA 2477487

Disclosed is a process for increasing a molecular weight of polyamide, which comprises: (A) providing polyamide or a molding composition containing the polyamide and at least one other ingredient, wherein the polyamide contains from 5 to 500 ppm of phosphorous in the form of an acidic compound resulting from a catalyst employed in preparation of the polyamide; and (B) heating the polyamide or the molding composition in the presence of (i) a compound having at least two carbonate units and (ii) a salt of a weak acid in an amount of from 0.001 to 10% by weight based on the polyamide, under conditions effective to increase the molecular weight of the polyamide. By this process, the molecular weight of a wide variety of polyamides may be increased.

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