| 摘要 |
The present invention relates to the use of water soluble polymers comprising repeat unit moieties <CHEM> wherein R1 is H or lower alkyl (C1-C3); R2 is OH, OM, or NH2; M is a water soluble cation; R3 is a hydroxy substituted alkyl or alkylene radical having from 1 to about 6 carbon atoms or a non-substituted alkyl or alkylene radical having from 1 to 6 carbon atoms; X is an anionic radical; Z is H or hydrogens or a water soluble cation or cations which together counterbalance the valence of X, and a is 0 or 1. These copolymers. and terpolymeric derivatives, can be used in a method for inhibiting calcium phosphate or calcium phosphonate deposition in aqueous systems; and also to function to provide a passivated oxide film along treated metal surfaces when used conjointly with a water soluble orthophosphate source. |
