초록 ▼

A water soluble isopropenylphosphonic acid copolymer composition and method of use thereof are disclosed. The copolymer comprises repeat units (a) of the formula [Figure] wherein X=OH or OM, wherein M is a cation; and repeat units (b) of the formula [Figure] wherein R1 is chosen from the group consi

A water soluble isopropenylphosphonic acid copolymer composition and method of use thereof are disclosed. The copolymer comprises repeat units (a) of the formula [Figure] wherein X=OH or OM, wherein M is a cation; and repeat units (b) of the formula [Figure] wherein R1 is chosen from the group consisting of hydroxy, hydroxylated alkoxy, and amide and water soluble salts thereof; R2 is H, or lower alkyl of from 1-3 carbon atoms. These copolymers are effective in inhibiting the precipitation of certain scale forming salts, and also act to inhibit corrosion in water systems.

대표청구항 ▼

Method of controlling the deposition of scale imparting precipitates on the structural parts of a system exposed to an aqueous medium comprising scale imparting precipitates under deposit forming conditions, said method comprising adding to said aqueous medium an effective amount for the purpose of

Method of controlling the deposition of scale imparting precipitates on the structural parts of a system exposed to an aqueous medium comprising scale imparting precipitates under deposit forming conditions, said method comprising adding to said aqueous medium an effective amount for the purpose of a water soluble copolymer (I) consisting essentially of repeat unit moieties (a) and (b), said repeat unit moiety (a) having the structure [Figure] wherein X=OH′or OM, wherein M is a cation, said repeat unit moiety (b) having the structure [Figure] wherein R2 is H, or lower alkyl of from about 1-3 carbon atoms, and wherein R1 comprises a member selected from the group consisting of hydroxy, hydroxylated alkoxy, and amide, and water soluble salt forms thereof, said copolymer having a molar ratio of a:b of from about 3:1 to about 0.5:1. Method as defined in claim 1 further comprising adding to said system, an effective amount for the purpose, of a compound (II) selected from the group consisting of inorganic phosphoric acids and water soluble salts thereof, phosphonic acids and water soluble salts thereof, organic phosphoric acid esters and water soluble salts thereof, and polyvalent metal salts capable of being dissociated to polyvalent metal ions in water.