Method of preparing high molecular weight polyamines

Details Method of preparing high molecular weight polyamines Method of preparing high molecular weight polyamines

C - Chemistry, Metallurgy

08

G

402/366

C08G 73/02 (2006.01)

Patent

CA 1193393

ABSTRACT OF THE DISCLOSURE An improved process for making high molecular weight polyamines is described. An ethylene or propylene dihalide is reacted with an amine of the formula Image in which x is an integer of from 0 to 5 and R is an ethylene or 1,2-propy- lene radical in the presence of a self-limiting neutralizing agent, which serves to maintain the pH of the reaction system at a generally constant alkaline value . Preferred self-limiting neutralizing agents are magnesium and calcium hydroxides. This method provides simpler control of reaction pH, and thus improves the linearity and molecular weight of the polymer.

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