Phospholipid dedusting agents for joint compounds

Patent metadata

Field	Value
Publication number	US-2019375681-A1
Application number	US-201916365820-A
Country	US
Kind code	A1
Filing date	Mar 27, 2019
Priority date	Jun 6, 2018
Publication date	Dec 12, 2019
Grant date	—

Abstract

A drying-type joint compound, a setting-type joint compound, and/or a ready-mixed, setting-type joint compound can include a phospholipid dedusting agent. For example, a drying-type joint compound can include: (a) a primary filler at 50 weight percent (wt %) to 98 wt % on a dry basis, wherein the primary filler includes one of calcium carbonate, calcium sulfate dihydrate, and talc, and a mixture thereof (b) a secondary filler at up to 25 wt % on a dry basis; (c) a binder at 1 wt % to 15 wt % on a dry basis; (d) a polymer thickener at 0.05 wt % to 3 wt % on a dry basis; (e) a phospholipid dedusting agent at 0.01 wt % to 3 wt % on a dry basis; (0 an additive up to 10 wt % o on a dry basis; and (g) water at a weight ratio of water to dry components of 1:6 to 2:1.

First claim

What is claimed is:

1 . A joint compound comprising in weight percent on a dry basis:
about 25% to about 98% filler, about 1% to about 45% binder, and about 0.01% to about 3% phospholipid dedusting agent.

2 . The joint compound of claim 1 , wherein the joint compound is a drying-type joint compound,
wherein the joint compound comprises in weight percent on a dry basis:
the filler, wherein the filler comprises:
a primary filler at about 50 weight percent (wt %) to about 98 wt % of the joint compound on a dry basis, wherein the primary filler is calcium carbonate, calcium sulfate dihydrate, or talc, or a mixture thereof, and
a secondary filler at up to about 25 wt % of the joint compound on a dry basis;

about 1 wt % to about 15 wt % the binder;
about 0.01 wt % to about 3 wt % the phospholipid dedusting agent;
wherein the joint compound further comprises in weight percent on a dry basis about 0.05 wt % to about 3 wt % a polymer thickener.

3 . The joint compound of claim 1 , wherein the joint compound is a drying-type joint compound,
further comprising water; wherein the joint compound comprises joint compound components other than the water comprising in weight percent on a dry basis: the filler, wherein the filler comprises:
a primary filler at about 50 weight percent (wt %) to about 98 wt % of the joint compound on a dry basis, wherein the primary filler is calcium carbonate, calcium sulfate dihydrate, or talc, or a mixture thereof, and
a secondary filler at up to about 25 wt % of the joint compound on a dry basis;
about 1 wt % to about 15 wt % said binder; about 0.01 wt % to about 3 wt % said phospholipid dedusting agent; wherein the joint compound components other than the water further comprise in weight percent on a dry basis about 0.05 wt % to about 3 wt % a polymer thickener; and wherein a weight ratio of the water to the joint compound components other than the water is about 1:6 to about 2:1.

4 . The joint compound of claim 1 , wherein the phospholipid dedusting agent comprises one or more of phosphatidylcholine, phosphatidylserine, phosphatidylinositol, phosphatidylethanolamine, and phosphatidylglycerol.

5 . The joint compound of claim 1 , wherein the phospholipid dedusting agent comprises one or more phospholipids conjugated with one or more of a polyethylene glycol, a polyethylene oxide, a fluorescent dye, a chromogenic dye, a protein, a peptide, a carbohydrate, a sterol, a fatty acid, and a synthetic polymer.

6 . The joint compound of claim 1 , wherein the joint compound has an absence of gypsum.

7 . The joint compound of claim 1 , wherein the joint compound has an absence of calcined gypsum.

8 . A joint compound comprising in weight percent on a dry basis:
a calcium sulfate hemihydrate at about 20 weight percent (wt %) to about 99 wt % of the setting-type joint compound on a dry basis; up to about 30% filler, up to about 8 wt % the binder; up to about 2 wt % the polymer thickener; and about 0.01% to about 3% phospholipid dedusting agent.

9 . The joint compound of claim 8 ,
wherein the joint compound is a setting-type joint compound and comprises in weight percent on a dry basis:
about 20 weight percent (wt %) to about 99 wt % the calcium sulfate hemihydrate;
up to about 30 wt % the filler;
about 0.5 wt % to about 8 wt % the binder;
about 0.01 wt % to about 3 wt % the phospholipid dedusting agent; and
wherein the joint compound further comprises in weight percent on a dry basis: about 0.05 wt % to about 2 wt % polymer thickener.

10 . The joint compound of claim 8 ,
wherein the joint compound is ready-mixed, setting-type joint compound further comprising water and a set retarder, and wherein the joint compound comprises joint compound components other than the water in weight percent (wt %) on a dry basis comprising:
about 20 wt % to about 99 wt % calcium sulfate hemihydrate;
up to about 30 wt % the filler;
up to about 8 wt % the binder;
up to about 2 wt % the polymer thickener;
about 0.01 wt % to about 3 wt % the phospholipid dedusting agent; and
about 0.001 wt % to about 2 wt % the set retarder;
wherein a weight ratio of the water to joint compound components other than water is about 1:6 to about 2:1.

11 . The joint compound of claim 9 , wherein the phospholipid dedusting agent comprises one or more of phosphatidylcholine, phosphatidylserine, phosphatidylinositol, phosphatidylethanolamine, and phosphatidylglycerol.

12 . The joint compound of claim 8 , wherein the phospholipid dedusting agent comprises one or more phospholipids conjugated with one or more of a polyethylene glycol, a polyethylene oxide, a fluorescent dye, a chromogenic dye, a protein, a peptide, a carbohydrate, a sterol, a fatty acid, and a synthetic polymer.

13 . The joint compound of claim 8 having an absence of surfactant other than the phospholipids and/or functionalized phospholipids of the phospholipid dedusting agent.

14 . The joint compound of claim 8 , wherein the joint compound has an absence of gypsum.

15 . A method comprising:
applying the joint compound of claim 1 to a surface; drying and/or setting the joint compound; and dry or wet sanding the joint compound after drying and/or setting.

16 . A method comprising:
applying the joint compound of claim 8 to a surface; drying and/or setting the joint compound; and dry or wet sanding the joint compound after drying and/or setting.

Assignees

• United States Gypsum Co

Inventors

• Donovan Alexander J

Classifications

• C04B2111/1018

  Gypsum free or very low gypsum content cement compositions · CPC title

• C04B2103/0075

  Anti-dusting agents · CPC title

• C04B28/145

  Calcium sulfate hemi-hydrate with a specific crystal form · CPC title

• C04B24/085

  Higher fatty acids · CPC title

• C04B14/28

  of calcium · CPC title