Lightweight wall repair compounds

Patent metadata

Field	Value
Publication number	US-10590266-B2
Application number	US-201816201616-A
Country	US
Kind code	B2
Filing date	Nov 27, 2018
Priority date	Jun 13, 2008
Publication date	Mar 17, 2020
Grant date	Mar 17, 2020

Abstract

Herein are disclosed wall repair compounds comprising at least one or more polymeric binder latex emulsions, one or more inorganic fillers, and comprising an amount of organic polymeric thickener that is less than about 0.1 percent by weight based on the total weight of the wall repair compound. In certain embodiments, the wall repair compound comprises an inorganic filler system selected such that such that synthetic inorganic fillers comprise essentially 100 percent of the inorganic filler used. In certain embodiments, the wall repair compound comprises one or more glycol ether smoothing agents.

First claim

What is claimed is:

1. A wall repair compound, comprising,
an aqueous latex binder emulsion comprising an acrylic binder comprising vinyl acrylic polymers or copolymers made from the polymerization of monomers that comprise acrylate and/or methacrylate groups, wherein the aqueous latex binder emulsion makes up at least about 40 percent by weight of the wall repair compound;
an inorganic filler system comprising at least 99% by weight glass bubbles, wherein the inorganic filler system makes up at most 50 percent by weight of the wall repair compound.

2. The compound of claim 1 wherein the acrylic binder comprises a glass transition temperature from about 15° C. to about 35° C.

3. The compound of claim 1 wherein the acrylic binder exhibits a glass transition temperature peak covering an interval of at least 5° C.

4. The compound of claim 1 wherein the acrylic binder comprises a glass transition temperature from about 15° C. to about 35° C. and exhibits a glass transition temperature peak covering an interval of at least 5° C.

5. The compound of claim 1 wherein the inorganic filler system comprises essentially 100% by weight glass bubbles.

6. The compound of claim 1 wherein the compound comprises one or more glycol ether smoothing agents in an amount of at most about 2.5 percent by weight.

7. The compound of claim 1 wherein the compound comprises less than about 0.1 percent by weight of inorganic thickening filler clay.

8. The compound of claim 1 wherein the aqueous latex binder emulsion comprises from about 40 percent by weight to about 80 percent by weight of the compound.

9. The compound of claim 1 further comprising from about 0.1 percent to about 0.8 percent by weight of preservative.

10. The compound of claim 1 further comprising one or more dust reducing additives chosen from the group consisting of oils, waxes and mixtures thereof.

11. The compound of claim 1 with the proviso that the compound does not include any dust reducing additives chosen from the group consisting of oils, waxes and mixtures thereof.

12. The compound of claim 1 wherein the compound exhibits a shrinkage upon drying of less than about 2.5%.

13. The compound of claim 1 wherein the glass bubbles exhibit a median particle size of at least about 15 microns and at most about 80 microns.

14. The compound of claim 1 wherein the glass bubbles exhibit a median particle size of at least about 40 microns and at most about 80 microns.

15. The compound of claim 1 wherein the aqueous latex binder emulsion consists of the acrylic binder comprising vinyl acrylic polymers or copolymers made from the polymerization of monomers that comprise acrylate and/or methacrylate groups.

16. A method of repairing a wall, the method comprising the steps of:
filling a cavity in a wall with the wall repair compound of claim 1 ;
and,
allowing the wall repair compound to dry.

17. The method of claim 16 further comprising the step of painting at least the dried wall repair compound.

Assignees

• 3M Innovative Properties Co

Inventors

• Gozum John E
• Mallo Richard A

Classifications

• C04B2111/70

  Grouts, e.g. injection mixtures for cables for prestressed concrete · CPC title

• C08K7/28 Primary

  Glass · CPC title

• C08K3/01

  characterized by their specific function · CPC title

• C08K2003/2241

  Titanium dioxide · CPC title

• C08K7/24

  inorganic · CPC title