Gypsum panels and mats therefor with wetting agent to enhance gypsum penetration

Patent metadata

Field	Value
Publication number	US-11253889-B2
Application number	US-201916574962-A
Country	US
Kind code	B2
Filing date	Sep 18, 2019
Priority date	Aug 3, 2016
Publication date	Feb 22, 2022
Grant date	Feb 22, 2022

Abstract

In one aspect, a gypsum panel includes a gypsum core, a fiberglass mat, and a wetting agent deposited across an entire thickness of the fiberglass mat. The wetting agent is deposited onto the first fiberglass mat in an uncoated state of the fiberglass mat such that the wetting agent penetrates the entire thickness of the fiberglass mat.

First claim

What is claimed is:

1. A gypsum panel, comprising:
a gypsum core having a first surface and a second surface opposite the first surface;
a first fiberglass mat having a first surface associated with the first surface of the gypsum core, such that gypsum of the gypsum core penetrates at least a portion of the first fiberglass mat; and
a wetting agent deposited across an entire thickness of the first fiberglass mat, wherein the wetting agent is deposited onto the first fiberglass mat in an uncoated state of the first fiberglass mat, such that the wetting agent penetrates the entire thickness of the first fiberglass mat,
wherein the wetting agent penetrating the entire thickness of the first fiberglass mat facilitates the penetration of gypsum of the gypsum core such that voids in the first fiberglass mat are substantially eliminated.

2. The gypsum panel of claim 1 , wherein the wetting agent is a surfactant.

3. The gypsum panel of claim 2 , wherein the surfactant is selected from a group consisting of multifunctional acetylenic agents, ethoxylated low-foam agents, siloxane-based surfactants, and nonionic superwetting and coalescing surfactants.

4. The gypsum panel of claim 2 , wherein the surfactant has a boiling point of 200° C. or lower.

5. The gypsum panel of claim 2 , wherein the surfactant has a boiling point of 150° C. or lower.

6. The gypsum panel of claim 2 , wherein the surfactant has a boiling point of 110° C. or lower.

7. The gypsum panel of claim 1 , wherein the wetting agent is deposited across the first fiberglass mat in an amount of about 0.01 lb/1,000 ft 2 to about 10 lb/1,000 ft 2 .

8. The gypsum panel of claim 1 , wherein the wetting agent is deposited across the first fiberglass mat in an amount of about 0.01 lb/1,000 ft 2 to about 5 lb/1,000 ft 2 .

9. The gypsum panel of claim 1 , wherein the wetting agent is deposited across the first fiberglass mat in an amount of about 0.01 lb/1,000 ft 2 to about 1 lb/1,000 ft 2 .

10. The gypsum panel of claim 1 , further comprising a barrier coating continuous along a second surface of the first fiberglass mat opposite the first surface.

11. The gypsum panel of claim 1 , further comprising a second fiberglass mat associated with the second surface of the gypsum core.

12. The gypsum panel of claim 1 , wherein the wetting agent has a wet surface tension of about 50 dyne/cm or less.

13. A gypsum panel, comprising:
a gypsum core having a first surface and a second surface opposite the first surface;
a first fiberglass mat having a first surface associated with the first surface of the gypsum core, such that gypsum of the gypsum core penetrates at least a portion of the first fiberglass mat; and
a wetting agent deposited across an entire thickness of the first fiberglass mat, wherein the wetting agent is deposited onto the first fiberglass mat in an uncoated state of the first fiberglass mat, such that the wetting agent penetrates the entire thickness of the first fiberglass mat,
wherein the wetting agent is a surfactant selected from a group consisting of multifunctional acetylenic agents, ethoxylated low-foam agents, siloxane-based surfactants, and nonionic superwetting and coalescing surfactants,
wherein the wetting agent is deposited across the first fiberglass mat in an amount of about 0.01 lb/1,000 ft 2 to about 10 lb/1,000 ft 2 , and
wherein the wetting agent penetrating the entire thickness of the first fiberglass mat facilitates the penetration of gypsum of the gypsum core such that voids in the first fiberglass mat are substantially eliminated.

14. The gypsum panel of claim 13 , wherein the surfactant has a boiling point of 200° C. or lower.

15. The gypsum panel of claim 13 , wherein the surfactant has a boiling point of 110° C. or lower.

16. The gypsum panel of claim 13 , wherein the wetting agent is deposited across the first fiberglass mat in an amount of about 0.01 lb/1,000 ft 2 to about 1 lb/1,000 ft 2 .

17. The gypsum panel of claim 13 , further comprising a barrier coating continuous along a second surface of the first fiberglass mat opposite the first surface.

18. The gypsum panel of claim 13 , wherein the wetting agent has a wet surface tension of about 50 dyne/cm or less.

Assignees

• Georgia Pacific Gypsum Llc

Inventors

• Teng Yi-Hsien Harry
• Bradford Rochelle F

Classifications

• C03C13/00

  Fibre or filament compositions (manufacture of fibres or filaments C03B37/00) · CPC title

• C03C2213/00

  Glass fibres or filaments · CPC title

• E04C2/043 Primary

  of plaster (E04C2/049 takes precedence) · CPC title

• B05D3/104

  Pretreatment of other substrates · CPC title

• C03C25/54

  Combinations of one or more coatings containing organic materials only with one or more coatings containing inorganic materials only · CPC title