C - Chemistry – Metallurgy – 23 – F
Patent
C - Chemistry, Metallurgy
23
F
134/39
C23F 14/02 (2006.01) C02F 5/14 (2006.01) C07F 9/11 (2006.01)
Patent
CA 2022023
ABSTRACT This invention relates to certain calcium insensitive phosphonomethyl amine compounds and their use as scale control agents for treating aqueous systems. The compounds of this invention are water-soluble phosphonomethyl amine compounds having the formula: Image and water soluble salts thereof selected from the group consisting of N-phosphonomethyl iminodiacetic acid, N,N-bis-phosphonomethyl- 2-(hydroxyethoxy)ethylamine, 4-(phosphonomethyl)-2-hydroxy-2-oxo-1,4,2-oxazaphosphorin- ane, N,N-bis-phosphonomethyl taurine and N,N-bis-phosphonomethyl ethylamine; and having a cloud point of at least about 25 ppm as determined by the CA500 cloud point test or a water soluble salt of said phosphonomethyl amine.
Gaudette Roger R.
Hwa Chih M.
Kelly John A.
Neton Janet
Scanlon Patricia M.
Betzdearborn Inc.
Gowling Lafleur Henderson Llp
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