Wall compounds and methods of use

Patent metadata

Field	Value
Publication number	US-11267758-B2
Application number	US-201816641210-A
Country	US
Kind code	B2
Filing date	Aug 22, 2018
Priority date	Aug 22, 2017
Publication date	Mar 8, 2022
Grant date	Mar 8, 2022

Abstract

A wall compound for use in all applications and particularly well-suited for joining adjacent wallboards. The compound includes a latex resin, a thickener, fibers, and a filler material. In some embodiments, the repair compound is configured to exhibit at least one of yield stress and pseudoplastic-type behavior. In some embodiments, the compound includes hydrophobic and hydrophilic fibers of different morphologies. In some embodiments, the wall compound includes one or more associative thickeners.

First claim

What is claimed is:

1. A wall compound comprising:
a latex resin or resin binder present in an amount of about 50% by weight or less, based on the total weight of the compound;
a thickener package including a hydrophilic alkali swellable emulsion, wherein the thickener package is present in amount of 1% by weight or less, based on the total weight of the compound;
hydrophobic dry fibrillated fibers and hydrophilic fibers; and
a filler material consisting of substantially spherical synthetic inorganic filler, wherein the wall compound exhibits yield stress behavior, having a yield stress value of at least 200 and no greater than 1000 Pa, and wherein the compound exhibits a Viscosity at 1500 Pa of stress of no greater than 10 Pa·s, each as measured according to the description.

2. The wall compound of claim 1 , wherein the latex resin or resin binder is at least one of a vinyl acrylic polymer or copolymer, an acrylic polymer or copolymer, an acrylate polymer or copolymer, a polyvinyl acetate polymer or copolymer, an ethylene vinyl acetate polymer or copolymer, a styrene-butadiene polymer or copolymer, a polyacrylamide polymer or copolymer, a natural rubber latex, a natural starch, a synthetic starch, and casein.

3. The wall compound of claim 1 , wherein the latex resin or resin binder is 100% acrylate.

4. The wall compound of claim 1 , wherein the compound exhibits a Viscosity at 1500 Pa of stress of no greater than 9 Pa·s.

5. The wall compound of claim 1 , wherein the thickener package includes a polyurethane based rheology modifier.

6. The wall compound of claim 1 , The wall compound of any of the preceding claims, wherein the fibers are present in total in an amount of no greater than 3% by weight, based on the total weight of the compound.

7. The wall compound of claim 1 , wherein the hydrophobic dry fibrillated fibers have a length and the hydrophilic fibers have a length and the length of the hydrophobic dry fibrillated fibers is less than the length of the hydrophobic fibers.

8. The wall compound of claim 7 , wherein the fibers include hydrophobic dry fibrillated polyethylene fibers and hydrophilic rayon fibers.

9. The wall compound of claim 1 wherein the filler is at least one of glass bubbles and ceramic microspheres.

10. The wall compound of claim 1 , further comprising at least one of an adhesion promoter, a humectant, a surfactant, a dispersing agent, an activator, a pH control agent, a colorant, a primer, a smoothing agent, water, and a preservative.

11. The wall compound of claim 1 , further comprising titanium dioxide present in an amount of between about 5% by weight and about 20% by weight.

12. The wall compound of claim 1 , wherein the thickener includes an HEUR and the alkali swellable emulsion.

13. The wall compound of claim 1 , wherein the wall compound is a yield stress fluid and has a density of not greater than 6 lbs/gal.

14. A method for affixing and holding two panels together at a joint seam, the method comprising: creating a joint seam by positioning two panels such that the panels abut; and applying the wall compound of claim 1 to the joint seam and some panel surface area around the seam.

15. The method of claim 14 , wherein the wall compound is allowed to dry and create a film, and wherein the method further comprises applying at least one coat of a wall compound over at least a portion of the film.

16. The method of claim 14 , wherein the method is performed without joint reinforcement tape.

17. A wall compound comprising:
a latex resin or resin binder; present in an amount of about 50% by weight or less, based on the total weight of the compound;
a thickener package comprising a rheology modifier and a hydrophilic alkali swellable emulsion;
two or more types of fibers; and
glass bubbles, wherein the wall compound exhibits yield stress behavior, having a yield stress value of at least 200 and no greater than 1000 Pa, and wherein the compound exhibits a Viscosity at 1500 Pa of stress of no greater than 10 Pa·s, each as measured according to the description.

18. The wall compound of claim 17 , wherein the fibers include hydrophobic dry fibrillated polyethylene fibers and hydrophilic rayon fibers.

Assignees

• 3M Innovative Properties Co

Inventors

• Wang Danli

Classifications

• C04B24/282

  Polyurethanes; Polyisocyanates · CPC title

• C04B26/06 Primary

  Acrylates · CPC title

• C04B26/04 Primary

  obtained by reactions only involving carbon-to-carbon unsaturated bonds · CPC title

• C08K7/18

  inorganic · CPC title

• C04B2103/44

  Thickening, gelling or viscosity increasing agents · CPC title