Method of emulsifying substituted cyclic dicarboxylic acid...

Details Method of emulsifying substituted cyclic dicarboxylic acid... Method of emulsifying substituted cyclic dicarboxylic acid...

D - Textiles, Paper

21

H

D21H 17/00 (2006.01) B01F 17/16 (2006.01) D21H 21/16 (2006.01)

Patent

CA 2502795

A method of emulsifying a substituted cyclic dicarboxylic acid anhydride sizing agent such as alkenyl succinic anhydride (ASA), primarily for papermaking operations, uses a cationic reaction polymer synthesized from an epihalohydrin and a polyamine, preferably a polyalkyleneamine. The synthesis of the reaction product is controlled to obtain a polymer end product viscosity, by Brookfield, ranging between 50 and 300 cps at 25 °C and at 30 to 35% solids. Alternatively, the preferred cationic polymers can be described as having an intrinsic viscosity value in a 0.2M NaCl solution of 0.18 to 0.35 dL/gm at 30 °C. The polyamine-epihalohydrin polymers can also be optionally used in combination with a surfactant for further emulsifying of the ASA size.

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