Detail of "1118-92-9"

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Water-in-oil emulsions having improved low temperature properties

Water-in-oil emulsions having improved low temperature properties. Rance, Robert W. (Dow Chemical Rheinwerk G.m.b.H., USA). U.S. US 4506051 A 19 Mar 1985, 9 pp. (English). (United States of America). CODEN: USXXAM. CLASS: ICM: C08K005-20. NCL: 524233000. APPLICATION: US 83-530794 9 Sep 1983. DOCUMENT TYPE: Patent CA Section: 37 (Plastics Manufacture and Processing) The low-temp. properties, i.e., the freeze-thaw stability and/or the fluidity at low temps. (-20°), of a self-inverting, water-in-oil emulsion of a water-sol. polymer are improved by incorporating an N,N-dialkylamide in the emulsion. Thus, a water-in-oil emulsion of water-sol. acrylamide-acrylic acid copolymer (I) [9003-06-9] was prepd., comprising 23% of a continuous oil phase of Isopar M (a mixt. of isoparaffinic hydrocarbons having a flash point of 77°) contg. the oil-sol. The discontinuous aq. phase of this emulsion contained ~40% I. To the emulsion was added 4% (based on emulsion wt.) of a mixt. contg. equal parts of an inverting surfactant (1 mol octylphenol condensed with 16 mols ethylene oxide) and an N,N-dialkylamide compn. contg. N,N-dimethylcaprylamide [1118-92-9] 50, N,N-dimethylcapramide [14433-76-2] 40, N,N-dimethylcaproamide [5830-30-8] 5, and N,N-dimethyllauramide [3007-53-2] 5%. The emulsion maintained its fluidity with no gel formation after 3 freeze-thaw cycles (each cycle comprised 22 h at -20°, followed by 2 h at room temp.). The emulsion could be inverted in a synthetic sea water contg. an addnl. 3% KCl.