# US 12,180,438 B2 · Dispersant polymer for automatic dishwashing > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,180,438 B2 - Document ID: US12180438B2 - Status: Granted - Kind: B2 - Application number: 17/601,763 - Filed: 2020-05-19 - Published: 2022-06-23 - Granted: 2024-12-31 - Earliest claimed: 2019-05-30 - Assignees: Rohm and Haas Company; Union Carbide Corporation - Applicants: Rohm and Haas Company; Union Carbide Corporation - Inventors: Scott Backer; Marianne Creamer; Paul Mercando; Eric Wasserman; Ashutosh Umarvadia; Muhunthan Sathiosatham; James Pawlow - Web page: https://patentgrep.com/patent/US12180438B2 ## CPC - C11D 3/3757: {(Co)polymerised carboxylic acids, -anhydrides, -esters in solid and liquid compositions} - C11D 1/66: Non-ionic compounds {(C11D1/002, C11D1/004, C11D1/008 take precedence)} - C11D 1/72: Ethers of polyoxyalkylene glycols - C11D 3/08: Silicates - C11D 3/10: Carbonates {; Bicarbonates} - C11D 3/2082: {Polycarboxylic acids-salts thereof} - C11D 3/2086: {Hydroxy carboxylic acids-salts thereof} - C11D 3/30: Amines; Substituted amines {; Quaternized amines} - C11D 3/361: {Phosphonates, phosphinates or phosphonites} - C11D 3/3765: {in liquid compositions} - C11D 3/378: {(Co)polymerised monomers containing sulfur, e.g. sulfonate} - C11D 3/38609: {Protease or amylase in solid compositions only} - C11D 3/3905: {Bleach activators or bleach catalysts} - C11D 3/3907: {Organic compounds} - C11D 3/3917: {Nitrogen-containing compounds} - C11D 2111/18: Glass; Plastics - C11D: DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL ## Abstract An automatic dishwashing composition is provided including a builder; a phosphonate; a nonionic surfactant; and a dispersant polymer, comprising: (a) 50 to 95 wt %, based on weight of the dispersant polymer, of structural units of a monoethylenically unsaturated monocarboxylic acid monomer; and (b) 5 to 50 wt %, based on weight of the dispersant polymer, of structural units of a sulfate bearing ethylenically unsaturated monomer. ## Claims ### Claim 1 An automatic dishwashing composition, comprising: a builder; a phosphonate; a nonionic surfactant; and a dispersant polymer, comprising: (a) 50 to 95 wt %, based on weight of the dispersant polymer, of structural units of a monoethylenically unsaturated monocarboxylic acid monomer; and (b) 5 to 50 wt %, based on weight of the dispersant polymer, of structural units of a sulfate bearing ethylenically unsaturated monomer; wherein the structural units of the sulfate bearing ethylenically unsaturated monomer are structural units of formula II wherein a is an average of 1 to 2; wherein b is an average of 2 to 20; wherein c is an average of 1 to 3; wherein each R2 is independently selected from a hydrogen and a —CH3 group; wherein each R3 and R4 is independently selected from a hydrogen and a C1-2 alkyl group; wherein X is a cation sufficient to balance the charge of formula II. ### Claim 2 (depends on 1) The automatic dishwashing composition of claim 1, wherein the automatic dishwashing composition contains less than 0.1 wt %, based on the dry weight of the automatic dishwashing composition, of phosphate, measured as elemental phosphorus. ### Claim 3 (depends on 2) The automatic dishwashing composition of claim 2, wherein the automatic dishwashing composition contains less than 0.1 wt %, based on the dry weight of the automatic dishwashing composition, of builders selected from the group consisting of nitrilotriacetic acid; ethylenediaminetetraacetic acid; diethylenetriaminepentaacetic acid; glycine-N,N-diacetic acid; methyl glycine-N,N-diacetic acid; 2-hydroxyethyliminodiacetic acid; glutamic acid-N,N-diacetic acid; 3-hydroxy-2,2′-iminodissuccinate; S,S-ethylenediaminedisuccinate aspartic acid-diacetic acid; N,N′-ethylene diamine disuccinic acid; iminodisuccinic acid; aspartic acid; aspartic acid-N,N-diacetic acid; beta-alaninediacetic acid; polyaspartic acid; salts thereof and mixtures thereof. ### Claim 4 (depends on 3) The automatic dishwashing composition of claim 3, wherein the dispersant polymer comprises: (a) 70 to 83 wt %, based on weight of the dispersant polymer, of structural units of the monoethylenically unsaturated monocarboxylic acid monomer, wherein the structural units of the monoethylenically unsaturated monocarboxylic acid monomer are structural units of formula I wherein each R1 is independently selected from a hydrogen and a —CH3 group; and (b) 17 to 30 wt %, based on weight of the dispersant polymer, of structural units of the sulfate bearing ethylenically unsaturated monomer; wherein a is an average of 1; wherein b is an average of 2 to 10; wherein c is an average of 1 to 2; wherein each R3 and R4 is independently selected from a hydrogen and a methyl group; and wherein the dispersant polymer has a weight average molecular weight of 1,000 to 50,000 Daltons. ### Claim 5 (depends on 4) The automatic dishwashing composition of claim 4, wherein R1 is a hydrogen in 50 to 100 mol % of the structural units of formula I in the dispersant polymer. ### Claim 6 (depends on 5) The automatic dishwashing composition of claim 5, wherein a is an average of 1; wherein b is an average of 2 to 6; wherein c is an average of 1; and wherein R2 is a hydrogen in 50 to 100 mol % of the structural units of formula II in the dispersant polymer. ### Claim 7 (depends on 6) The automatic dishwashing composition of claim 6, wherein the dispersant polymer comprises: (a) 75 to 81 wt % of structural units of formula I; and (b) 19 to 25 wt % of structural units of formula II; and wherein the dispersant polymer has a weight average molecular weight of 15,000 to 30,000 Daltons. ### Claim 8 (depends on 7) The automatic dishwashing composition of claim 7, further comprising an additive selected from the group consisting of a bleaching agent, a bleach activator, an enzyme, a filler, and mixtures thereof. ### Claim 9 (depends on 1) A method of cleaning an article in an automatic dishwashing machine, comprising: providing at least one article; providing an automatic dishwashing composition according to claim 1; and, applying the automatic dishwashing composition to the at least one article. ### Claim 10 (depends on 8, 9) The method of claim 9, wherein the automatic dishwashing composition provided and applied to the at least one article is according to claim 8. ### Claim 11 (depends on 1) The automatic dishwashing composition of claim 1, wherein the dispersant polymer comprises <0.1 mol % of structural units of ethylenically unsaturated dicarboxylic acid monomer. ### Claim 12 (depends on 1) The automatic dishwashing composition of claim 1, wherein the dispersant polymer comprises <0.05 mol % of structural units of ethylenically unsaturated dicarboxylic acid monomer. ### Claim 13 (depends on 1) The automatic dishwashing composition of claim 1, wherein the dispersant polymer comprises <0.03 mol % of structural units of ethylenically unsaturated dicarboxylic acid monomer. ### Claim 14 (depends on 1) The automatic dishwashing composition of claim 1, wherein the dispersant polymer comprises <0.01 mol % of structural units of ethylenically unsaturated dicarboxylic acid monomer. ### Claim 15 (depends on 1) The automatic dishwashing composition of claim 1, wherein the dispersant polymer comprises