Water-soluble polymers derived from copolymerization of diene and maleic acid or maleic acid derivative and aqueous quenching fluids prepared therefore

Claim 2

An aqueous quenching fluid consisting essentially of (a) a conjugated diene-maleic acid derivative copolymer containing recurring anionic units represented by the formulae: ##STR5## wherein R represents a conjugated diene unit, R' and R", respectively, represent hydrogen, a halogen atom or an organic radical containing from 1 to 18 carbon atoms, and the acid groups are partly or entirely dissociated in such a way that the ratio of (I) to (II) is between 100:0 and 0:100;

Claim 3

(b) at least one cation selected from the group consisting of alkali metal cation, ammonium ion and substituted ammonium ion represented by R 1 R 2 R 3 R 4 N + wherein R 1 , R 2 , and R 3 , and R 4 , respectively, are selected from the group consisting of hydrogen, alkyl-, cycloalkyl-, and aryl-groups containing from 1 to 18 carbon atoms, said cation being present in an amount from about 0.5 to about 5.0 equivalents on the basis of the maleic acid derivative unit in component (a); (c) Mg ++ in an amount from about 0.3 to about 2.0 equivalents on the basis of the maleic acid derivative unit in component (a); and, (d) at least one anion capable of forming a water-soluble salt with Mg ++ or alkali metal ions in an amount from about 0.5 to about 0.7 equivalents on the basis of the maleic acid derivative unit in component (a).

Claim 4

(b) at least one cation selected from the group consisting of alkali metal cation, ammonium ion and substituted ammonium ion represented by R 1 R 2 R 3 R 4 N + wherein R 1 , R 2 , and R 3 , and R 4 , respectively, are selected from the group consisting of hydrogen, alkyl-, cycloalkyl-, and aryl-groups containing from 1 to 18 carbon atoms, said cation being present in an amount from about 0.5 to about 5.0 equivalents on the basis of the maleic acid derivative unit in component (a); (c) Mg ++ in an amount from about 0.3 to about 2.0 equivalents on the basis of the maleic acid derivative unit in component (a); and, (d) at least one anion capable of forming a water-soluble salt with Mg ++ or alkali metal ions in an amount from about 0.5 to about 0.7 equivalents on the basis of the maleic acid derivative unit in component (a).

Claim 5

A water-soluble polymer according to claim 1 wherein the conjugated diene unit in component (a) is derived from butadiene, isoprene, piperilene, chloroprene, 2,3-dimethylbutadiene, 2,3-dichlorobutadiene, 2-methyl-1,3-hexadiene, or 1-methoxy-1,3-butadiene.

Claim 6

A water-soluble polymer according to claim 1 wherein the maleic acid derivative unit in component (a) is derived from maleic acid, monochloromaleic acid, dichloromaleic acid or citraconic acid.

Claim 7

A water-soluble polymer according to claim 1 wherein the anions in component (d) is selected from the group consisting of Cl - , Br - , NO 3 - , ClO 4 - , HCO 3 - , OH - , SO 4 2- , MnO 4 - and organic carboxylate anions.

Claim 8

An aqueous quenching fluid consisting essentially of a quenching effective amount of components (a), (b), (c), and (d) of claim 1 dissolved in water.

Claim 9

The aqueous quenching fluid of claim 5 in which water is present in an amount from 5 to 1,000 times as much as the total amount of components (a), (b), (c), and (d).

Claim 10

In a process for quenching metals, the improvement which comprises applying an aqueous quenching fluid of claim 9 to hot metal.