# US 2014/0194566 A1 · Amphoteric polymer composition

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- Number: US 2014/0194566 A1
- Document ID: US20140194566A1
- Status: Published application
- Kind: A1
- Application number: 14/122,380
- Filed: 2012-05-29
- Published: 2014-07-10
- Earliest claimed: 2011-06-02
- Assignees: Rohm and Haas Company
- Applicants: Rohm and Haas Company
- Inventors: Kathleeen A. Auld; Ward T. Brown; Kevin J. Henderson; Anurima Singh; Antony K. Van Dyk; Lidaris San Miguel Rivera
- Web page: https://patentgrep.com/patent/US20140194566A1

## CPC

- C09D 7/44: Combinations of two or more thickening agents
- C08G 65/3322: {acyclic}
- C09D 5/027: {Dispersing agents (anti-settling agents C09D7/45)}
- C09D 133/08: Homopolymers or copolymers of acrylic acid esters
- C09D 133/14: of esters containing halogen, nitrogen, sulfur or oxygen atoms in addition to the carboxy oxygen
- C09D 141/00: Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a bond to sulfur or by a heterocyclic ring containing sulfur; Coating compositions based on derivatives of such polymers
- C08F 220/585: {and containing other heteroatoms, e.g. 2-acrylamido-2-methylpropane sulfonic acid [AMPS]}
- C09D: COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR (cosmetics A61K; processes for applying liquids or other fluent materials to surfaces, in general, B05D; staining wood B27K5/02; glazes or vitreous enamels C03C; natural resins, French polish, drying-oils, driers, turpentine, per se, C09F; polishing compositions other than French polish, ski waxes C09G; adhesives or use of materials as adhesives C09J; materials for sealing or packing joints or covers C09K3/10; materials for stopping leaks C09K3/12; processes for the electrolytic or electrophoretic production of coatings C25D)
- C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08F: MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS

## Abstract

The present invention relates to a composition comprising an amphoteric polymer having pendant acid groups, or salts thereof, and pendant mono- or dialkylamino ethylene oxide groups or alkylammonium ethylene oxide groups characterized by either of the following formulas: where R1-R3 and X− are as defined herein. The composition of the present invention improves hiding efficiency for coating compositions formulated using associative rheology modifiers, binders, and titanium dioxide.

## Claims

### Claim 1

A composition comprising an amphoteric polymer having pendant acid groups, or salts thereof, and pendant mono- or dialkylamino ethylene oxide groups or alkylammonium ethylene oxide groups characterized by either of the following formulas:
where R1 and R3 are each independently hydrogen or —C1-C12-alkyl; R2 is C3-C12 alkyl, and X− is a counterion.

### Claim 2 (depends on 1)

The composition of claim 1 wherein the pendant acid groups are sulfur acid groups.

### Claim 3 (depends on 2)

The composition of claim 2 wherein the pendant acid groups are structural units of sulfoethyl (meth)acrylate, sulfopropyl (meth)acrylate, styrene sulfonic acid, vinyl sulfonic acid, or 2-(meth)acrylamido-2-methyl propanesulfonic acid, or salts thereof; and the pendant dialkyl amino ethylene oxide groups characterized by the following formula:
where R1 and R2 are each independently C3-C8-alkyl.

### Claim 4 (depends on 3)

The composition of claim 3 wherein the pendant acid groups are structural units of 2-methacrylamido-2-methyl propanesulfonic acid or styrene sulfonic acid or a salt thereof; and the pendant dialkyl amino ethylene oxide groups characterized by the following formula:
where the mole:mole ratio of the structural units of 2-(meth)acrylamido-2-methyl propanesulfonic acid, or a salt thereof to dialkyl amino ethylene oxide groups is in the range of from 20:1 to 1:1.

### Claim 5 (depends on 4)

The composition of claim 4 wherein the weight percent of the pendant acid groups is from 50 to 95 weight percent, based on the weight of the amphoteric polymer.

### Claim 6 (depends on 1)

An aqueous composition comprising a rheology modifier, titanium dioxide particles, a latex binder, and the composition of claim 1.

### Claim 7 (depends on 6)

The aqueous composition of claim 6 wherein the rheology modifier is a HEUR thickener, a HASE thickener, or an HMHEC thickener.

### Claim 8 (depends on 6)

The aqueous composition of claim 6 wherein the rheology modifier is an HEC thickener.

### Claim 9 (depends on 6)

The aqueous composition of claim 6 which is a coating composition.