Plasticizer dedusting agents for joint compounds

Patent metadata

Field	Value
Publication number	US-12006262-B2
Application number	US-202016812827-A
Country	US
Kind code	B2
Filing date	Mar 9, 2020
Priority date	Jul 19, 2019
Publication date	Jun 11, 2024
Grant date	Jun 11, 2024

Abstract

A joint compound including calcium sulfate hemihydrate and/or at least one filler, wherein a total amount of the at least one filler and/or calcium sulfate hemihydrate is at least about 50 wt % of the joint compound on a dry (water-free) basis, preferably the filler comprises calcium carbonate, calcium sulfate dihydrate, or calcium sulfate anhydrite, or a mixture thereof; binder at up to about 15 wt % of the joint compound on a dry basis; polymer thickener at up to about 3 wt % of the joint compound on a dry basis; plasticizer dedusting agent at about 0.01 to about 3 wt % of the joint compound on a dry (water free) basis; and an additive up to about 10 wt % of the joint compound on a dry basis.

First claim

What is claimed is:

1. A joint compound comprising:
calcium sulfate hemihydrate and/or at least one filler, wherein a total amount of the calcium sulfate hemihydrate and/or the at least one filler is at least 50 weight percent (wt %),
a binder at up to 15 wt % of the joint compound on a dry basis;
a polymer thickener at up to 3 wt % of the joint compound on a dry basis;
a plasticizer dedusting agent at 0.1 to 3 wt % of the joint compound on a dry (water free) basis, wherein the plasticizer dedusting agent is a mixture of diethylene glycol dibenzoate, propylene glycol dibenzoate, and dipropylene glycol dibenzoate; and
an additive up to 10 wt % of the drying-type joint compound on a dry basis;
having an absence of polyvinyl acetate,
having an absence of vinyl acetate,
having an absence of set retarder comprising a polymer composition including acrylic acid and acrylamide monomer units,
having an absence of wax emulsions,
having an absence of polymer coated wax core particulates;
having an absence of wax,
having an absence of paraffins;
having an absence of polyacrylamide;
having an absence of glycol; and
having an absence of copolymer of acrylamide and acrylic acid,
wherein the mixture of diethylene glycol dibenzoate, propylene glycol dibenzoate, and dipropylene glycol dibenzoate is the sole dedusting agent.

2. The joint compound of claim 1 , wherein the mixture of diethylene glycol dibenzoate, propylene glycol dibenzoate, and dipropylene glycol dibenzoate is 0.1 to 1.0 wt % of the joint compound on a dry (water free) basis, wherein the binder of the joint compound consists of a member of the group consisting of polyvinyl alcohol, latex emulsions, and mixtures thereof.

3. The joint compound of claim 2 , wherein the joint compound is drying-type joint compound comprising the filler,
wherein the filler comprises a primary filler at 50 to 98 wt % of the joint compound on a dry basis and a secondary filler at 0 to 25 wt % of the joint compound on a dry basis,
wherein the primary filler comprises any of calcium carbonate, calcium sulfate dihydrate, calcium sulfate anhydrite, or a mixture thereof, and
wherein the plasticizer dedusting agent is 0.3 to 1 wt %, of the joint compound on a dry basis.

4. The joint compound of claim 1 , wherein the joint compound is drying-type joint compound comprising joint compound components and water,
wherein the joint compound components comprise the filler, the binder, the polymer thickener, the plasticizer dedusting agent, and the additive,
wherein:
the filler comprises a primary filler at 50 to 98 wt % of the drying-type joint compound on a dry basis, wherein the primary filler comprises one selected from the group consisting of calcium carbonate, calcium sulfate dihydrate, and calcium sulfate anhydrite, and a mixture thereof;
the filler comprises a secondary filler at up to 25 wt % of the drying-type joint compound on a dry basis;
wherein the primary filler and the secondary filler total at least 75 wt % on a dry basis;
the binder is 1 to 15 wt % of the drying-type joint compound on a dry basis;
the polymer thickener is 0.05 to 3 wt % of the drying-type joint compound on a dry basis;
the plasticizer dedusting agent is 0.5 to 0.1 wt % of the joint compound on a dry basis; and
the additive is up to 10 wt % of the drying-type joint compound on a dry basis; and

wherein the water is at a weight ratio of water to joint compound components of 1:3 to 3:1;
wherein the joint compound has an absence of calcium sulfate hemihydrate and an absence of set retarder,
wherein binder of the joint compound consists of a member of the group consisting of polyvinyl alcohol, vinyl chlorides, vinyl acrylic co-polymer, styrene acrylics, styrene butadiene, polyvinylacrylic, latex emulsions, natural and synthetic starch, casein, and mixtures thereof.

5. The joint compound of claim 1 , wherein the joint compound is setting-type joint compound comprising calcium sulfate hemihydrate, wherein the plasticizer dedusting agent is 0.1 to 2 wt % of the joint compound on a dry basis.

6. The joint compound of claim 1 , wherein the joint compound is setting-type joint compound, wherein:
the calcium sulfate hemihydrate is 20 to 99 wt % of the setting-type joint compound on a dry basis;
the filler is from 0.44 to 43 wt % of the setting-type joint compound on a dry basis;
the total calcium sulfate hemihydrate and the filler is 63 wt % to about 99.44 wt % of the setting-type joint compound on a dry basis;
the binder is 0.5 to 8 wt % of the setting-type joint compound on a dry basis;
the polymer thickener is 0.05 to 2 wt % of the setting-type joint compound on a dry basis;
the plasticizer dedusting agent is 0.1 to 3 wt % of the joint compound on a dry (water free) basis; and
the additive is up to 10 wt % of the setting-type joint compound on a dry basis,
wherein binder of the joint compound consists of a member of the group consisting of polyvinyl alcohol, vinyl chlorides, vinyl acrylic co-polymer, styrene acrylics, styrene butadiene, polyvinylacrylic, latex emulsions, natural and synthetic starch, casein, and mixtures thereof.

7. The joint compound of claim 1 , wherein the joint compound is ready-mixed type, setting-type joint compound comprising a set retarder, wherein the set retarder is 0.001 to 2 wt % of the ready-mixed, setting-type joint compound on a dry basis, wherein the plasticizer dedusting agent is 0.1 to 2 wt % of the joint compound on a dry (water free) basis.

8. The joint compound of claim 1 , wherein the joint compound is ready-mixed, setting-type joint compound comprising joint compound components and water, wherein the joint compound components comprise the calcium sulfate hemihydrate, the binder, the polymer thickener, the plasticizer dedusting agent, the additive, a set retarder and, if present, the filler,
wherein:
the calcium sulfate hemihydrate is 20 weight percent (wt %) to 99 wt % of the ready-mixed, setting-type joint compound on a dry basis;
the filler is 0.989 wt % to 55 wt % of the ready-mixed, setting-type joint compound on a dry basis;
the total calcium sulfate hemihydrate and the filler are 75 wt % to 99.989 wt % of the ready-mixed, setting joint compound on a dry basis;
the set retarder is 0.001 to 2 wt % of the ready-mixed, setting-type joint compound on a dry basis;
the binder is up to 8 wt % of the ready-mixed, setting-type joint compound on a dry basis;
the polymer thickener is up to 2 wt % of the ready-mixed, setting-type joint compound on a dry basis;
the plasticizer dedusting agent is 0.1 to 3 wt % of the joint compound on a dry basis; and
the additive is up to 10 wt % of the ready-mixed, setting-type joint compound on a dry basis; and

the water is at a ratio of water to joint compound components of 1:3 to 3:1,
wherein binder of the joint compound consists of a member of the group consisting of polyvinyl alcohol, vinyl chlorides, vinyl acrylic co-polymer, styrene acrylics, styrene butadiene, polyvinylacrylic, latex emulsions, natural and synthetic starch, casein, and mixtures thereof.

9. The joint compound of claim 4 , wherein the joint compound is the drying-type joint compound and comprises:
the primary filler at 65 wt % to 93 wt % of the drying-type joint compound on a dry basis, wherein more than half of the primary filler is calcium carbonate on a wt % dry basis;
the secondary filler at 3 wt % to 25 wt % of the drying-type joint compound on a dry basis;
the primary filler and the secondary filler are present as at least 75 wt % of the joint compound on a dry basis;
the binder at 1 wt % to 10 wt % of the drying-type joint compound on a dry basis;
the polymer thickener at 0.1 wt % to 2 wt % of the drying-type joint compound on

Assignees

• United States Gypsum Co

Inventors

• Donovan Alexander J
• Kincaid Tyler
• Pelot David
• Stevens Richard B
• Negri Robert H
• Punati Naveen

Classifications

• C04B2111/00681

  of the drying type · CPC title

• C04B2103/44

  Thickening, gelling or viscosity increasing agents · CPC title

• C04B2103/30

  Water reducers, plasticisers, air-entrainers, flow improvers · CPC title

• C04B2103/0075

  Anti-dusting agents · CPC title

• C04B24/383

  Cellulose or derivatives thereof · CPC title