Composition for plasterboards and products obtained
US-10941074-B2 · Mar 9, 2021 · US
Setting type joint compound compositions with reduced plaster
US11760692B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11760692-B2 |
| Application number | US-202117146940-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jan 12, 2021 |
| Priority date | Jan 28, 2020 |
| Publication date | Sep 19, 2023 |
| Grant date | Sep 19, 2023 |
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- Title
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Abstract
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A snap-setting joint compound with reduced calcium sulfate hemihydrate and improved sandability, as well as methods for building wall assemblies and repairing walls with the joint compound.
First claim
Opening claim text (preview).
What is claimed is: 1. A dry-powder setting-type joint compound, the setting-type joint compound comprising: calcium sulfate hemihydrate in an amount from 28 wt % to 50 wt %; calcium carbonate in an amount such that the total amount of calcium sulfate hemihydrate and calcium carbonate is 80 wt % to 95 wt %; a starch binder; a redispersible latex binder; one or more of kaolin clay, sepiolite, bentonite, montmorillonite clay, attapulgite clay, or any mixture thereof; a rheological modifier; a cellulosic thickener; a set retarder; and a set accelerator. 2. The dry-powder setting-type joint compound of claim 1 , wherein calcium sulfate hemihydrate is in the amount from 34 wt % to 46 wt %. 3. The dry-powder setting-type joint compound of claim 1 , wherein calcium sulfate hemihydrate does not comprise beta calcium sulfate hemihydrate. 4. The dry-powder setting-type joint compound of claim 1 , wherein calcium sulfate hemihydrate does not comprise alpha calcium sulfate hemihydrate. 5. The dry-powder setting-type joint compound of claim 1 , wherein the redispersible latex binder includes one or more of the following: vinyl acetate ethylene (VAE) copolymers, vinyl acetate/vinyl ester of versatic acid (VAE-VeoVa) copolymers, styrene butadiene, acrylic powder, polyvinyl alcohol, or any combination thereof. 6. The dry-powder setting-type joint compound of claim 1 , wherein the starch binder is pregelatinized. 7. The dry-powder setting-type joint compound of claim 1 , wherein the setting-type joint compound further comprises one or more of the following: perlite, resin microspheres, hollow microspheres, or any combination thereof. 8. The dry-powder setting-type joint compound of claim 1 , wherein the setting-type joint compound comprises from 5 wt % to 20 wt % of expanded perlite. 9. The dry-powder setting-type joint compound of claim 1 , wherein the setting-type joint compound comprises 0.01 wt % to 5 wt % of attapulgite clay. 10. The dry-powder setting-type joint compound of claim 1 , wherein the rheological modifier is a substituted starch.
Assignees
Inventors
Classifications
- C04B28/14Primary
containing calcium sulfate cements {(gypsum-paper plates E04C)} · CPC title
of the setting type · CPC title
of calcium · CPC title
Attapulgite clay · CPC title
Thickening, gelling or viscosity increasing agents · CPC title
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Frequently asked questions
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- What does patent US11760692B2 cover?
- A snap-setting joint compound with reduced calcium sulfate hemihydrate and improved sandability, as well as methods for building wall assemblies and repairing walls with the joint compound.
- Who is the assignee on this patent?
- United States Gypsum Co
- What technology area does this patent fall under?
- Primary CPC classification C04B28/14. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Sep 19 2023 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 4 related publications on this page (citations in our corpus or others sharing the same primary CPC).