Process for the production of improved polyaminopolyamide...

Details Process for the production of improved polyaminopolyamide... Process for the production of improved polyaminopolyamide...

C - Chemistry, Metallurgy

08

G

C08G 69/48 (2006.01) C08G 69/42 (2006.01) C08G 73/02 (2006.01)

Patent

CA 2048045

A process for the manufacture of improved water soluble polyaminopolyamide-epichlorohydrin resins is disclosed. The polyaminopolyamide-epichlorohydrin reaction is continued until between 70% to 100% of the total charge of epichlorohydrin has reacted. The polyaminopolyamide- epichlorohydrin mixture is then treated with a specified amount of a halogen-free mineral acid. Preferably the mineral acid is selected from the group consisting of sulphuric acid, phosphoric acid, nitric acid and sodium hydrogen sulphate. Following the completion of the acid addition the reaction is continued to effect at least a 10% reduction in the polymer bound organochlorine concentration, based on the composition of the reaction mixture at the time of the acid addition.

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