C - Chemistry – Metallurgy – 02 – F
Patent
C - Chemistry, Metallurgy
02
F
134/39, 260/501.
C02F 5/14 (2006.01) C07F 9/38 (2006.01)
Patent
CA 1229092
ABSTRACT OF THE DISCLOSURE Compounds having improved properties of inhibiting the precipitation of metal ions when used in threshold amounts have been made which are derivatives of ammonia or di- or polyamines in which the amine hydrogens have been substituted with both methylene- phosphonic acid groups or their salts and hydroxypropyl quaternaryammonium halide groups. Thus, ammonia can have two hydrogens replaced with methylenephosphonic groups while the third is replaced with a hydroxypropyl- trimethylammonium chloride group; and three hydrogens of ethylenediamine can be replaced with methylenephos- phonic groups, the fourth being replaced with a hydroxy- propyltrimethylammonium chloride group.
456808
Wilson David A.
Wilson Wilfred W.
Smart & Biggar
The Dow Chemical Company
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