C - Chemistry – Metallurgy – 02 – F
Patent
C - Chemistry, Metallurgy
02
F
134/39
C02F 5/14 (2006.01) C08G 16/02 (2006.01) C23F 14/00 (2006.01)
Patent
CA 1334501
A composition comprising an N-phosphonomethylated amino-2-hydroxypropylene polymer having a molecular weight of between about 300 and about 5000 and having the structural formula Image wherein (i) R1, R2, R3, R4, R5 and R6 are independently selected from the group consisting of hydrogen, phosphonomethyl radical corresponding to the formula -CH2PO(OH)2, and water treating acceptable salts of such phosphonomethyl radical, with the proviso that the percentage of R1, R2, R3, R4, R5 and R6 being hydrogen does not exceed about 30; (ii) R is a divalent radical selected from the group consisting of (a) unsubstituted alkylene groups having at least about 2 and at most about 12 carbon atoms, (b) substituted alkylene groups having at least about 2 and at most about 12 carbon atoms wherein at least one hydrogen of the alkylene group is substituted with a radical selected from the group consisting of methyl, ethyl, propyl, butyl, methyl ammonium, ethyl ammonium and ammonium groups, and the other hydrogens of the substituted alkylene group are unsubstituted, (c) cycloalkylene groups having at least 3 and at most about 12 carbon atoms, and (d) -R'-N-R"- wherein R7 is defined as R1, R2, R3, R4, R5 R7 and R6 above, with the proviso that the percentage of R1, R2, R3, R4, R5, R6 and R7 being hydrogen not exceed about 30, and R' and R" are independently selected from the group consisting of such unsubstituted alkylene groups, and such cycoalkylene groups; and (iii) n is from about 1 to about 25. Methods for preparation and use of such polymers are also disclosed.
591158
Dhawan Balram
Przybylinski John L.
Redmore Derek
Baker Hughes Incorporated
Macrae & Co.
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