Water-in-oil emulsions containing copolymers of maptac and...

Details Water-in-oil emulsions containing copolymers of maptac and... Water-in-oil emulsions containing copolymers of maptac and...

C - Chemistry, Metallurgy

02

F

134/45, 9/51, 36

C02F 1/56 (2006.01) D21H 3/38 (1980.01)

Patent

CA 1133788

ABSTRACT OF THE DISCLOSURE Described are water-in-oil emulsions which contain dispersed in the aqueous phase particles of a water-soluble copolymer having a ratio varying between 5-60 parts by weight of methacrylamidopropyltrimethyl- ammonium chloride (hereafter referred to as MAPTAC) to 95-40 parts by weight of acrylamide, said emulsion having the following comp???ion a. from 5-60% by weight of the MAPTAC acrylamide copolymer; b. from 20 -90% by weight of water; c. from 5-75% by weight of a hydrophobic liquid; and d. from 0,1-21% by weight of a water-in-oil emulsifying agent. These water-in-oil emulsions, particularly when derived form charcoal pre-purified MAPTAC momomers, give superior results when they are used to dewater sludges of the type found in municipal sewage and industrial waste treating plants. They are also useful in improving the fine and filler retention during the paper-making process. Further, they may be used for reducing fluid friction in pipelines and the like.

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