Scaling salt threshold inhibition and dispersion with hydrophilic/hydrophobic polymers

Claim 1

A method of reducing the accumulation of calcium phosphonate deposits in an industrial water system that contains soluble ions of at least one species that normally forms calcium phosphonate deposits in a pH environment of a pH greater than 7.0, comprising: adding to the water of said industrial water system at least an amount of a water soluble polymer effective for calcium phosphonate deposit reduction, said polymer comprised of mer units of Formulas I, II, and III, wherein: ##STR4## wherein R 2 is hydrogen or methyl, R 1 is hydrogen, R is methylene, and X is sulfonate; ##STR5## wherein R 3 is hydrogen or methyl, and Y is hydrogen or an alkali metal, alkaline earth metal, or ammonium cation; and ##STR6## wherein R 5 is hydrogen or methyl, R 4 is hydrogen and R 6 is t-butyl; wherein said polymer is comprised of from about 10 to about 25 mole percent of said units of said Formula I, from about 55 to about 85 mole percent of said units of said Formula II, and from about 5 to about 20 mole percent of said units of said Formula III, and has a molecular weight of from about 3,000 to about 50,000 wherein said units of Formula II are comprised of from 5 to 30 mole percent methacrylic acid and salts thereof, and the remainder of said units of Formula II being acrylic acid and salts thereof.

Claim 2

A method of reducing the accumulation of calcium phosphonate deposits in an industrial water system that contains soluble ions of at least one species that normally forms calcium phosphonate deposits in a pH environment of a pH greater than 7.0, comprising: adding to the water of said industrial water system at least an amount of a water soluble polymer effective for calcium phosphonate deposit reduction, said polymer comprised of mer units of Formulas I, II, and III, wherein: ##STR4## wherein R 2 is hydrogen or methyl, R 1 is hydrogen, R is methylene, and X is sulfonate; ##STR5## wherein R 3 is hydrogen or methyl, and Y is hydrogen or an alkali metal, alkaline earth metal, or ammonium cation; and ##STR6## wherein R 5 is hydrogen or methyl, R 4 is hydrogen and R 6 is t-butyl; wherein said polymer is comprised of from about 10 to about 25 mole percent of said units of said Formula I, from about 55 to about 85 mole percent of said units of said Formula II, and from about 5 to about 20 mole percent of said units of said Formula III, and has a molecular weight of from about 3,000 to about 50,000 wherein said units of Formula II are comprised of from 5 to 30 mole percent methacrylic acid and salts thereof, and the remainder of said units of Formula II being acrylic acid and salts thereof.

Claim 9

A method of reducing the accumulation of calcium phosphonate deposits in an industrial water system that contains soluble ions of at least one species that normally forms calcium phosphonate deposits in a pH environment of a pH of 8.0 or greater, comprising: adding to the water of said industrial water system at least 0.1 ppm of a water soluble polymer comprised of mer units of Formulas I, II and III, wherein: ##STR7## wherein R 1 and R 2 are each hydrogen, R is methylene, and X is sulfonate; ##STR8## wherein R 3 is hydrogen or methyl and Y is hydrogen or an alkali metal, alkaline earth metal or ammonium cation; and ##STR9## wherein R 4 and R 5 are each hydrogen and R 6 is a t-butyl radical; wherein said polymer is comprised of from about 10 to about 25 mole percent of said units of said Formula I, from about 55 to about 85 mole percent of said units of said Formula II, and from about 10 to about 20 mole percent of said units of said Formula III, and has a molecular weight of from about 3,000 to about 30,000 wherein said units of Formula II are comprised of from 5 to 30 mole percent methacrylic acid and salts thereof, and the remainder of said units of Formula II being acrylic acid and salts thereof.

Claim 10

A method of reducing the accumulation of calcium phosphonate deposits in an industrial water system that contains soluble ions of at least one species that normally forms calcium phosphonate deposits in a pH environment of a pH of 8.0 or greater, comprising: adding to the water of said industrial water system at least 0.1 ppm of a water soluble polymer comprised of mer units of Formulas I, II and III, wherein: ##STR7## wherein R 1 and R 2 are each hydrogen, R is methylene, and X is sulfonate; ##STR8## wherein R 3 is hydrogen or methyl and Y is hydrogen or an alkali metal, alkaline earth metal or ammonium cation; and ##STR9## wherein R 4 and R 5 are each hydrogen and R 6 is a t-butyl radical; wherein said polymer is comprised of from about 10 to about 25 mole percent of said units of said Formula I, from about 55 to about 85 mole percent of said units of said Formula II, and from about 10 to about 20 mole percent of said units of said Formula III, and has a molecular weight of from about 3,000 to about 30,000 wherein said units of Formula II are comprised of from 5 to 30 mole percent methacrylic acid and salts thereof, and the remainder of said units of Formula II being acrylic acid and salts thereof.