Joint compound with sulfonated starch

Patent metadata

Field	Value
Publication number	US-10781139-B2
Application number	US-201815914633-A
Country	US
Kind code	B2
Filing date	Mar 7, 2018
Priority date	Jun 7, 2017
Publication date	Sep 22, 2020
Grant date	Sep 22, 2020

Abstract

Provided herein is a joint compound having a composition to allow tools to easily clean up, comprising water, at least one inert filler, and a binder comprising a sulfonated starch, and a method of preparing the joint compound.

First claim

What is claimed is:

1. A joint compound having a composition to allow tools to easily clean up, comprising
at least one inert filler, wherein the at least one inert filler comprises at least one of calcium carbonate, dolomite, gypsum, perlite, mica, talc, sericite, diatomaceous earth, clay, attapulgite clay, sepiolite, kaolin, calcium sulfate dihydrate, and pyrophyllite, and
a sulfonated starch binder present in the composition in a concentration of from about 0.05% to about 10% by weight on a dry (water free solids) basis;
wherein the sulfonated starch binder comprises the moiety
—CH 2 O—X, X is —RSO 3 Na or —H, wherein at least one X is —RSO 3 Na, and the R is C 2 -C 18 alkyl or arylalkyl,
wherein the composition has an absence of plant protein.

2. The joint compound of claim 1 , wherein the sulfonated starch binder comprises the moiety
—CH 2 O—(C 2 -C 18 alkyl or arylalkyl)-SO 3 Na;
wherein the sulfonated starch binder is present in the composition in a concentration of from about 2.9 to about 5% by weight on a dry (water free solids) basis, where all binder of the composition consists of said sulfonated starch binder and optionally at least one additional binder selected from latex binder, vinyl acetates, acrylics, polyvinyl alcohols, and poly vinyl acetate dispersible powders, ethylene vinyl acetates dispersible powders, and non-sulfonated starches.

3. The joint compound of claim 1 , wherein the sulfonated starch binder comprises a repeating unit of Formula I:

wherein X is —RSO 3 Na or —H, wherein at least one X is —RSO 3 Na, and the R is C 2 -C 18 alkyl or arylalkyl, and n is between 25-1,500,000.

4. The joint compound of claim 1 , wherein the sulfonated starch binder comprises a repeating unit of formula II:

wherein R is C 2 -C 18 alkyl or arylalkyl, X is H.

5. The joint compound of claim 1 , wherein the sulfonated starch binder comprises an amylose based structure of formula III:

wherein n is between 25-1,500,000.

6. The joint compound of claim 1 , wherein the sulfonated starch binder comprises an amylose based moiety of formula IV:

7. The joint compound of claim 1 , wherein the sulfonated starch binder comprises an amylopectin based moiety of formula V:

8. The joint compound of claim 1 , wherein the sulfonated starch binder comprises the moiety of formula VI:

9. The joint compound of claim 1 , wherein the sulfonated starch binder comprises a sodium vinyl sulfonate moiety.

10. A joint compound having a composition to allow tools to easily clean up, wherein the composition consists of:
at least one inert filler wherein the at least one inert filler is at least one of calcium carbonate, dolomite, gypsum, perlite, mica, talc, sericite, diatomaceous earth, clay, attapulgjte clay, sepiolite, kaolin, calcium sulfate dehydrate, and pyrophyllite, and
a sulfonated starch binder present, in the composition in a concentration of from about 0.05 to about 10% by weight on a dry (water free solids) basis, and optionally at least one additional binder selected from latex binder, vinyl acetates, acrylics, polyvinyl alcohols, and poly vinyl acetate dispersible powders, ethylene vinyl acetates dispersible powders, and non-sulfonated starches;
wherein the sulfonated starch binder comprises the moiety
—CH 2 O—X, X is —RSO 3 Na or —H, wherein at least one X is —RSO 3 Na, and the R is C 2 -C 18 alkyl or arylalkyl,
optionally at least one of a thickener, a preservative, a pH modifier, a pigment, a PEG 400-PEG 1000 polyethylene glycol, suspending agent and dispersant;
wherein the thickener is cellulose compound,
wherein the preservative is at least one of a bactericide, a fungicide, and biocide,
wherein the suspending agent or dispersant is at least one of clay and hydrous magnesium silicate,
optionally at least one of humectants, wetting agents, kaolin, defoamers and plasticizers, and
optionally water.

11. A joint compound having a composition to allow tools to easily clean up, comprising:
at least one inert filler, wherein the at least one inert filler comprises at least one of calcium carbonate, dolomite, gypsum, perlite, mica, talc, sericite, diatomaceous earth, clay, attapulgite clay, sepiolite, kaolin, calcium sulfate dihydrate, and pyrophyllite, and
a sulfonated starch binder present in the composition in a concentration of from about 0.05 to about 10% by weight on a dry (water free solids) basis;
wherein the sulfonated starch binder comprises the moiety
—CH 2 O—X, X is —RSO 3 Na or —H, wherein at least one X is —RSO 3 Na, and the R is C 2 -C 18 alkyl or arylalkyl
wherein all binder of the composition consists of said sulfonated starch binder and optionally at least one additional binder selected from latex binder, vinyl acetates, acrylics, polyvinyl alcohols, and poly vinyl acetate dispersible powders, ethylene vinyl acetates dispersible powders, and non-sulfonated starches.

12. The joint compound of claim 1 , further comprising a thickener, a preservative, and/or a suspending agent or dispersant, wherein the thickener is a cellulose thickener, wherein the cellulose thickener is ethylhydroxy ethylcellulose, hydroxypropyl methylcellulose, methylhydroxypropyl cellulose, hydroxyethyl cellulose, methylhydroxyethyl cellulose, or a mixture thereof.

13. The joint compound of claim 10 , wherein the sulfonated starch binder is present in the composition in a concentration of from about 0.1 to about 5% by weight on a dry (water free solids) basis.

14. The joint compound of claim 10 , wherein the composition consists of:
the at least one inert filler,
the sulfonated starch binder,
optionally at least one of the thickener, the preservative, the pH modifier, the pigment, suspending agent and the dispersant;
wherein the thickener is cellulose compound, wherein the cellulose thickener compound is ethylhydroxy ethylcellulose, hydroxypropyl methyl cellulose, methylhydroxypropyl cellulose, hydroxy ethyl cellulose, methyl hydroxy ethyl cellulose, or a mixture thereof,
wherein the preservative is at least one of a bactericide, a fungicide, and biocide, wherein the suspending agent or dispersant is at least one of clay and hydrous magnesium silicate,
optionally at least one of humectants, wetting agents, kaolin, defoamers and plasticizers, and
optionally water.

15. The joint compound of claim 14 , wherein the sulfonated starch binder is present in the composition in a concentration of from about 2.9 to about 5% by weight on a dry (water free solids) basis.

16. The joint compound of claim 1 , wherein the composition is a ready-mix drying-type joint compound composition comprising calcium carbonate as the at least one inert filler, the binder, and water.

17. The joint compound of claim 1 , wherein the composition is a ready-mix drying-type lightweight joint compound composition wherein the filler comprises a heavyweight inorganic filler, an expanded perlite, and optionally a lightweight filler other than the perlite, and further compr

Assignees

• United States Gypsum Co

Inventors

• Weinberger Renee J
• Lu Runhai
• Sang Yijun
• Rosenthal Guy L

Classifications

• C04B26/28 Primary

  Polysaccharides or derivatives thereof · CPC title

• C09J103/08

  Ethers · CPC title

• C08B31/12

  having alkyl or cycloalkyl radicals substituted by heteroatoms, {e.g. hydroxyalkyl or carboxyalkyl starch} · CPC title

• C08L3/08

  Ethers · CPC title

• C08L1/284

  with hydroxylated hydrocarbon radicals · CPC title