# US 2013/0156961 A1 · Tape joint compound

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

- Number: US 2013/0156961 A1
- Document ID: US20130156961A1
- Status: Published application
- Kind: A1
- Application number: 13/718,085
- Filed: 2012-12-18
- Published: 2013-06-20
- Earliest claimed: 2011-12-20
- Assignees: Dow Global Technologies LLC; Rohm and Haas Company
- Inventors: Harry R. HEULINGS, IV; Larry N. HYMAN
- Web page: https://patentgrep.com/patent/US20130156961A1

## CPC

- C08L 1/28: Alkyl ethers
- C04B 26/06: Acrylates
- C08L 33/02: Homopolymers or copolymers of acids; Metal or ammonium salts thereof
- C04B 2103/0065: {Polymers characterised by their glass transition temperature (Tg)}
- C04B 2111/00672: {Pointing or jointing materials}
- C04B 2111/1018: {Gypsum free or very low gypsum content cement compositions}
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)
- C04B: LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE {(roofing granules E04D7/005)}; CERAMICS (devitrified glass-ceramics C03C10/00); REFRACTORIES; TREATMENT OF NATURAL STONE

## Abstract

An aqueous tape joint compound including: an inorganic filler; an emulsion polymer binder; cellulose ether thickener; water; and from 0.01 to 1.3% by weight based on the weight of the aqueous joint compound, water-soluble polymer or salts thereof, the water-soluble polymer selected from the group consisting of (a) polymer consisting essentially of, as polymerized units, from 50% to 100%, by weight based on the weight of the polymer, acrylic acid, and from 0% to 50%, by weight based on the weight of the polymer, second monoethylenically unsaturated acid monomer, (b) diisobutylene-maleic anhydride polymer, and (c) mixtures thereof; the water-soluble polymer having a weight average molecular weight of from 1500 to 75,000 and a calculated Tg of from 80° C. to 250° C.; the aqueous tape joint compound being substantially free from calcium sulfate hemihydrate is provided.

## Claims

### Claim 1

An aqueous tape joint compound comprising: an inorganic filler; an emulsion polymer binder; cellulose ether thickener; water; and from 0.01 to 1.3% by weight based on the weight of said aqueous joint compound, water-soluble polymer or salts thereof, said water-soluble polymer selected from the group consisting of (a) polymer consisting essentially of, as polymerized units, from 50% to 100%, by weight based on the weight of said polymer, acrylic acid, and from 0% to 50%, by weight based on the weight of said polymer, second monoethylenically unsaturated acid monomer, (b) diisobutylene-maleic anhydride polymer, and (c) mixtures thereof;
said water-soluble polymer having a weight average molecular weight of from 1500 to 75,000 and a calculated Tg of from 80° C. to 250° C.; and
wherein said aqueous tape joint compound is substantially free from calcium sulfate hemihydrate.

### Claim 2 (depends on 1)

The aqueous tape joint compound of claim 1 wherein said water-soluble polymer has a weight average molecular weight of from 1700 to 50,000.

### Claim 3 (depends on 1)

The aqueous tape joint compound of claim 1 wherein said water-soluble polymer consists essentially of polyacrylic acid.

### Claim 4 (depends on 1)

The aqueous tape joint compound of claim 1 having a Braebender viscosity of from 400 to 800 BU measured according to ASTM standard C474@25° C.

### Claim 5

A method for forming an aqueous tape joint compound comprising admixing an inorganic filler; an emulsion polymer binder; cellulose ether thickener; water; and from 0.01 to 1.3% by weight based on the weight of said aqueous joint compound, water-soluble polymer or salts thereof, said water-soluble polymer selected from the group consisting of (a) polymer consisting essentially of, as polymerized units, from 50% to 100%, by weight based on the weight of said polymer, acrylic acid, and from 0% to 50%, by weight based on the weight of said polymer, second monoethylenically unsaturated acid monomer, (b) diisobutylene-maleic anhydride polymer, and (c) mixtures thereof;
said polymer having a weight average molecular weight of from 1500 to 75,000 and a calculated Tg of from 80° C. to 250° C.; and
wherein said tape joint compound is substantially free from calcium sulfate hemihydrate.

### Claim 6 (depends on 5)

The method of claim 5 wherein said water-soluble polymer is provided in solid powder form.

### Claim 7 (depends on 1, 2, 3, 4)

A method for providing a monolithic surface comprising
(a) providing a first planar substrate having a first edge;
(b) abutting a second edge of a second planar substrate, thereby forming a joint;
(c) applying the aqueous tape joint compound of any of claims 1-4 to the joint; and
(d) allowing the aqueous tape joint compound to dry.

### Claim 8 (depends on 7)

The method according to claim 7 further comprising applying a joint tape to said joint prior to step (c) or embedded into the aqueous tape joint compound prior to step (d).