# US 5,708,108 A · Water treatment polymer containing poly›oxy-›(hydroxymethyl)-1,2-ethanediyl!! macromonomers and methods of use thereof

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- Number: US 5,708,108 A
- Document ID: US5708108A
- Status: Granted
- Kind: A
- Application number: 08/642,835
- Filed: 1996-05-03
- Granted: 1998-01-13
- Earliest claimed: 1995-04-21
- Assignees: BetzDearborn Inc.
- Inventors: William S. Carey; Andrew Solov
- Web page: https://patentgrep.com/patent/US5708108A

## CPC

- C23F 11/173: Macromolecular compounds
- C02F 5/10: using organic substances
- C23F: NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE (working metal by laser beams B23K26/00; desurfacing by applying flames B23K7/00; working of metal by electro-erosion B23H; producing decorative effects by removing surface material, e.g. by engraving, by etching, B44C1/22; electrolytic etching or polishing C25F); INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C02F: TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE (separation in general B01D; special arrangements on waterborne vessels of installations for treating water, waste water or sewage, e.g. for producing fresh water, B63J; adding materials to water to prevent corrosion C23F; treating radioactively-contaminated liquids G21F9/04; regeneration of reactants for recirculation into processes, see the relevant places for the processes)

## Abstract

A polymer and method of controlling corrosion and the formation and deposition of scale imparting compounds in water systems is disclosed. The polymer has the general structure: ##STR1## wherein E.sup.1 comprises the repeat unit obtained after polymerization an .alpha.,.beta. ethylenically unsaturated carboxylic acid monomers, lower alkyl (C.sub.1 -C.sub.6) ester or a hydroxylated lower alkyl (C.sub.1 -C.sub.6) ester of such carboxylic acid, or amide forms thereof; E.sup.2 comprises the repeat unit obtained after polymerization of an .alpha.,.beta. ethylenically unsaturated monomer containing a sulfonic acid functionality; R.sup.1 is a hydrogen or a lower (C.sub.1 -C.sub.3) alkyl; R.sup.2 is --CH.sub.2 --O-- or --C(.dbd.O)--O--; R.sup.3 is --›--CH.sub.2 --CH(--CH.sub.2 --OH)--O--!--.sub.n ; n is an integer greater than 1; and R.sup.4 is hydrogen, or C1-C20 alkyl; and x is the molar percentage being between 1-98 molar %, y is the molar percentage being between 1-98 molar %, z is the molar percentage being between 98-1 molar %, wherein the sum of x, y and z equal 100%. This polymer may also be used in concert with topping agents.

## Claims

### Claim 1

A water soluble polymer having the structure: ##STR5## wherein E.sup.1 comprises the repeat unit obtained after polymerization of an .alpha. .beta. ethylenically unsaturated carboxylic acid monomer, a lower alkyl (C.sub.1 -C.sub.6) ester or a hydroxylated lower alkyl (C.sub.1 -C.sub.6) ester of such carboxylic acid, or amide forms thereof; E.sup.2 comprises the repeat unit obtained after polymerization of an .alpha., .beta. ethylenically unsaturated monomer containing a sulfonic acid functionality, R.sup.1 is a hydrogen or a lower (C.sub.1 -C.sub.3) alkyl; R.sup.2 is --CH.sub.2 --O-- or --C(.dbd.O)--O--; R.sup.3 is --›--CH.sub.2 --CH(--CH.sub.2 --OH)--O--!--.sub.n ; n is an integer greater than 1; and R.sup.4 is hydrogen, or C1-C20 alkyl; and x is the molar percentage being between 1-98 molar %, y is the molar percentage being between 1-98 molar %, z is the molar percentage being between 1-98 molar %, wherein the sum of x, y and z equal 100%.

### Claim 2 (depends on 1)

The water soluble polymer of claim 1 wherein E.sup.1 is selected from the group consisting of repeat units formed after polymerization of acrylic acid, methacrylic acid, acrylamide, maleic acid or anhydride, itaconic acid and 2-hydroxypropyl acrylate.

### Claim 3 (depends on 1)

The water soluble polymer of claim 1 wherein E.sup.2 is selected from the group consisting of repeat units formed after polymerization of 2-acrylamido-2-methylpropane sulfonic acid sodium salt; 1-propane sulfonic acid, 2-hydroxy-3-(2-propenyloxy)-sodium salt; styrene sulfonic acid sodium salt, and vinyl sulfonic acid sodium salt.