# US 12,110,394 B2 · Aqueous polymer dispersion and process of making the same

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 12,110,394 B2
- Document ID: US12110394B2
- Status: Granted
- Kind: B2
- Application number: 17/611,696
- Filed: 2019-06-13
- Published: 2022-07-07
- Granted: 2024-10-08
- Earliest claimed: 2019-06-13
- Assignees: Dow Global Technologies LLC; Rohm and Haas Company; Dow Silicones Corporation
- Applicants: Dow Global Technologies LLC; Rohm and Haas Company; Dow Silicones Corporation
- Inventors: Xiangting Dong; Ling Li; Zhihua Liu; Hui Liu; Wei Cui; Baoqing Zheng; Zhi Juan Gong; Yan Wu; Changkun Piao; Jia Tang; Dong Yun
- Web page: https://patentgrep.com/patent/US12110394B2

## CPC

- C08L 83/04: Polysiloxanes
- C08F 2/001: {Multistage polymerisation processes characterised by a change in reactor conditions without deactivating the intermediate polymer (C08F295/00, C08F297/00 take precedence)}
- C08F 2/22: Emulsion polymerisation
- C08F 212/08: Styrene
- C08F 220/06: Acrylic acid; Methacrylic acid; Metal salts or ammonium salts thereof
- C08F 220/14: Methyl esters {, e.g. methyl (meth)acrylate}
- C08F 220/1804: {C4-(meth)acrylate, e.g. butyl (meth)acrylate, isobutyl (meth)acrylate or tert-butyl (meth)acrylate}
- C08F 220/1808: {C8-(meth)acrylate, e.g. isooctyl (meth)acrylate or 2-ethylhexyl (meth)acrylate}
- C08F 220/56: Acrylamide; Methacrylamide
- C08F 230/08: containing silicon
- C08F 230/085: {the monomer being a polymerisable silane, e.g. (meth)acryloyloxy trialkoxy silanes or vinyl trialkoxysilanes}
- C08G 77/16: to hydroxy groups
- C08G 77/20: containing silicon bound to unsaturated aliphatic groups
- C09D 7/65: macromolecular (C09D7/41-C09D7/48 take precedence)
- C09D 133/14: of esters containing halogen, nitrogen, sulfur or oxygen atoms in addition to the carboxy oxygen
- C08G 2150/00: Compositions for coatings
- C08L 2201/50: Aqueous dispersion, e.g. containing polymers with a glass transition temperature (Tg) above 20°C
- C08L 2205/02: containing two or more polymers of the same C08L -group
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)
- 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
- 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)

## Abstract

An aqueous dispersion comprising a multistage polymer comprising a first polymer and a second polymer that comprises structural units of an ethylenically unsaturated siloxane monomer, the multistage polymer comprising, by weight based on the weight of the multistage polymer, 4.5% or more of structural units of the ethylenically unsaturated siloxane monomer, and the coagulum content of the aqueous dispersion is less than 2,000 ppm after filtration through a 44 micron sieve.

## Claims

### Claim 1

An aqueous dispersion comprising a multistage polymer, wherein the multistage polymer comprises at least a first polymer and a second polymer,
wherein the second polymer comprises structural units of an ethylenically unsaturated siloxane monomer of formula (I), (II), or (III),
wherein, in formula (I), R is an ethylenically unsaturated group, and j and k are each independently in the range of from 0 to 100, and j+k=5 to 100;
wherein, in formula (II), R is an ethylenically unsaturated group, R1 is a hydroxyl, alkyl, aryl, alkoxyl, aryloxy, alkyl ether, or aryl ether group, and m is from 1 to 100;
wherein, in formula (III), R is an ethylenically unsaturated group, R1 and R2 are each independently a hydroxyl, alkyl, aryl, alkoxyl, aryloxy, alkyl ether, or aryl ether group, n is from 1 to 5, and p is from 1 to 100;
wherein the multistage polymer comprises, by weight based on the weight of the multistage polymer, 4.5% or more of structural units of the ethylenically unsaturated siloxane monomer; and
wherein the coagulum content of the aqueous dispersion is less than 2,000 ppm after filtration through a 44 micron sieve.

### Claim 2 (depends on 1)

The aqueous dispersion of claim 1, wherein the second polymer comprises, by weight based on the weight of the second polymer, 5% or more of structural units of the ethylenically unsaturated siloxane monomer.

### Claim 3 (depends on 1)

The aqueous dispersion of claim 1, wherein the ethylenically unsaturated siloxane monomer has the structure represented by formula (I), wherein R is —CH═CH2, —Rp—OC(═O)CH═CH2, or —Rp—OC(═O)C(CH3)═CH2, where Rp is a C1-C6 bivalent hydrocarbon group, and j+k is in the range of from 5 to 50.

### Claim 4 (depends on 1)

The aqueous dispersion of claim 1, wherein the multistage polymer has a weight average molecular weight of 50,000 g/mol or more.

### Claim 5 (depends on 1)

The aqueous dispersion of claim 1, wherein the weight ratio of the first polymer to the second polymer is from 95:5 to 10:90.

### Claim 6 (depends on 1)

The aqueous dispersion of claim 1, wherein the second polymer further comprises structural units of an additional ethylenically unsaturated nonionic monomer, and optionally structural units of an ethylenically unsaturated functional monomer carrying at least one functional group selected from an amide, ureido, carboxyl, carboxylic anhydride, hydroxyl, or sulfonic acid group, a salt thereof, or mixtures thereof.

### Claim 7 (depends on 1)

The aqueous dispersion of claim 1, wherein the multistage polymer comprises, by weight based on the weight of the multistage polymer, from 4.8% to 40% of structural units of the ethylenically unsaturated siloxane monomer.

### Claim 8 (depends on 1)

The aqueous dispersion of claim 1, wherein the first polymer comprises structural units of an ethylenically unsaturated functional monomer carrying at least one functional group selected from an amide, ureido, carboxyl, carboxylic anhydride, hydroxyl, or sulfonic acid group, a salt thereof, or mixtures thereof; and structural units of an additional ethylenically unsaturated nonionic monomer.

### Claim 9 (depends on 1)

The aqueous dispersion of claim 1, wherein the first polymer comprises, by weight based on the weight of the first polymer, less than 5% of structural units of the ethylenically unsaturated siloxane monomer.

### Claim 10 (depends on 1)

A process for preparing the aqueous dispersion comprising a multistage polymer of claim 1, comprising:
preparing a first polymer by emulsion polymerization;
dispersing in the first polymer, a second monomer composition comprising an ethylenically unsaturated siloxane monomer, whereby the second monomer composition swells the first polymer, and
polymerizing the second monomer composition within the monomer-swollen first polymer to form a second polymer, thus to obtain the aqueous dispersion with a coagulum content of less than 2,000 ppm after filtration through a 44 micron sieve;
wherein the multistage polymer comprising the first polymer and the second polymer comprises, by weight based on the weight of the multistage polymer, 4.5% or more of structural units of the ethylenically unsaturated siloxane monomer; and
wherein the ethylenically unsaturated siloxane monomer has formula (I), (II), or (III),
wherein, in formula (I), R is an ethylenically unsaturated group, and j and k are each independently in the range of from 0 to 100, and j+k=5 to 100;
wherein, in formula (II), R is an ethylenically unsaturated group, R1 is a hydroxyl, alkyl, aryl, alkoxyl, aryloxy, alkyl ether, or aryl ether group, and m is from 1 to 100;
wherein, in formula (III), R is an ethylenically unsaturated group, R1 and R2 are each independently a hydroxyl, alkyl, aryl, alkoxyl, aryloxy, alkyl ether, or aryl ether group, n is from 1 to 5, and p is from 1 to 100.

### Claim 11 (depends on 10)

The process of preparing the aqueous dispersion of claim 10, wherein the second monomer composition is emulsified and homogenized prior to dispersing in the first polymer.

### Claim 12 (depends on 1)

An aqueous coating composition comprising the aqueous dispersion of claim 1.