# US 5,346,974 A · Polyether polycarboxylate compositions useful as detergent builders

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- Number: US 5,346,974 A
- Document ID: US5346974A
- Status: Granted
- Kind: A
- Application number: 07/946,714
- Filed: 1992-09-17
- Granted: 1994-09-13
- Earliest claimed: 1989-10-16
- Assignees: National Starch and Chemical Investment Holding Corporation
- Inventors: Carmine P. Iovine; Rama S. Chandran; John C. Leighton
- Web page: https://patentgrep.com/patent/US5346974A

## CPC

- C08F 210/00: Copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
- C08F 8/06: Oxidation
- C08G 61/12: Macromolecular compounds containing atoms other than carbon in the main chain of the macromolecule
- C11D 3/3757: {(Co)polymerised carboxylic acids, -anhydrides, -esters in solid and liquid compositions}
- C08F: MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C11D: DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL

## Abstract

This invention provides polyether polycarboxylate compositions selected from the group consisting of polyether polycarboxylates which may be prepared by oxidizing copolymers of furan and maleic anhydride, and other polyether polycarboxylate compositions prepared by oxidizing novel, intermediate polymers of furan, maleic anhydride, and at least one copolymerizable comonomer, selected from the group consisting of furan, alkenyl alkyl ethers, alkyl acrylates, alkenyl carboxyalkyl ethers, vinyl esters of carboxylic acids, unsaturated carboxylic acids, unsaturated dicarboxylic acids and their anhydrides and esters, and olefins. This invention also provides novel, unoxidized terpolymer intermediates comprising furan, maleic anhydride, and at least one copolymerizable comonomer, other than furan and maleic anhydride, selected from the above group, as well as a process for oxidizing these polymers and the furan and maleic anhydride copolymers. These compositions are useful as builders and as anti-redeposition agents in detergents.

## Claims

### Claim 1

A polymer comprising hydrolysis products and salts thereof of a polymer of furan, maleic anhydride and at least one copolymerized comonomer, comprising a repeating unit of the structure: ##STR6## wherein A is a repeating unit derived from at least one copolymerized comonomer, selected from the group consisting of alkenyl alkyl ethers, alkyl acrylates, alkenyl carboxyalkyl ethers, vinyl esters of carboxylic acids, unsaturated carboxylic acids, and unsaturated dicarboxylic acids other than maleic acid and their anhydrides and esters; R is H, --CH.sub.3, --CH.sub.2 CH.sub.3, or a combination thereof; m is at least 1; n is greater than zero; and p is an integer from about 5 to 6,000.

### Claim 2 (depends on 1)

The polymer of claim 1, wherein the polymer comprises a sodium, potassium, ammonium, monoethanolamine or triethanolamine salt.

### Claim 3

A polymer comprising hydrolysis products and salts of a polymer of furan, maleic anhydride and at least one copolymerized comonomer, comprising a repeating unit of the structure: ##STR7## wherein A is a repeating unit derived from isobutyl vinyl ether: R is H, --CH.sub.3, --CH.sub.2 --CH.sub.3, or a combination thereof; m is at least 1; n is greater than zero; and p is an integer from about 5to 6,000.

### Claim 4

A polymer comprising hydrolysis products and salts of a polymer of furan, maleic anhydride and at least one copolymerized comonomer, comprising a repeating unit of structure: ##STR8## wherein A is a repeating unit derived from methyl acrylate; R is H, --CH.sub.3, --CH.sub.2 CH.sub.3, or a combination thereof; m is at least 1; n is greater than zero; and p is an integer from about 5to 6,000.

### Claim 5

A polymer comprising hydrolysis products and salts of a polymer of furan, maleic anhydride and at least one copolymerized comonomer, comprising a repeating unit of the structure: ##STR9## wherein A is a repeating unit derived from acrylic acid; R is H, --CH.sub.3, --CH.sub.2 CH.sub.3, or a combination thereof; m is at least 1; n is greater than zero; and p is an integer from about 5 to 6,000.

### Claim 6

A polymer comprising hydrolysis products and salts of a polymer of furan, maleic anhydride and at least one copolymerized comonomer, comprising a repeating unit of the structure: ##STR10## wherein A is a repeating unit derived from itaconic acid; R Is H, --CH.sub.3, --CH.sub.2 CH.sub.3, or a combination thereof; m is at least 1; n is greater than zero; and p is an integer from about 5 to 6,000.

### Claim 7

A polymer comprising hydrolysis products and salts of a polymer of furan, maleic anhydride and at least one copolymerized comonomer, comprising a repeating unit of the structure: ##STR11## wherein A is a repeating unit derived from methyl vinyl oxyacetate; R Is H, --CH.sub.3, --CH.sub.2 CH.sub.3, or a combination thereof; m is at least 1; n is greater than zero; and p is an integer from about 5 to 6,000.

### Claim 8 (depends on 7)

The polymer of claim 7, wherein the polymer further comprises ester hydrolysis products derived from the methyl vinyl oxyacetate comonomer.