Lightweight joint treatment formulation

• US 20040060480A1
• Filed: 10/01/2002
• Published: 04/01/2004
• Est. Priority Date: 10/01/2002
• Status: Active Grant

• Current Assignee: Proform Finishing Products LLC
• Original Assignee: National Gypsum Properties LLC
• Inventors: Ayambem, Amba
• Granted Patent: US 6,790,277 B2
• Time in Patent Office: Days
• US Class Current: 106/793
• CPC Class Codes: C04B 14/042 Magnesium silicates, e.g. talc, sepiolite
• CPC Class Codes: C04B 14/18 Perlite
• CPC Class Codes: C04B 14/20 Mica; Vermiculite mechanical splitting B28D
• CPC Class Codes: C04B 2111/00681 of the drying type
• CPC Class Codes: C04B 24/2676 Polystyrenes
• CPC Class Codes: C04B 24/38 Polysaccharides or derivatives thereof C04B24/243 takes precedence
• CPC Class Codes: C04B 24/383 Cellulose or derivatives thereof
• CPC Class Codes: C04B 24/42 Organo-silicon compounds
• CPC Class Codes: C04B 26/04 obtained by reactions only involving carbon-to-carbon unsaturated bonds
• CPC Class Codes: C04B 26/32 containing silicon
• CPC Class Codes: Y10S 106/02 Perlite

Abstract

Wallboard joint compound compositions comprising water, calcium carbonate, a polyether siloxane copolymer, and a styrene-butadiene polymer are disclosed. The joint compound compositions display significantly reduced cratering, reduced shrinking, greater sag resistance, and excellent workability.

Claims

1. A joint compound composition comprising water, calcium carbonate, a polyether siloxane copolymer, and a styrene-butadiene polymer.

2. The composition of claim 1, wherein the water is present at a concentration of at least about 30 weight percent based on the weight of the composition.

3. The composition of claim 1, wherein the water is present at a concentration of at about 30 weight percent to about 50 weight percent based on the weight of the composition.

4. The composition of claim 1, wherein the calcium carbonate is present at a concentration of at least about 25 weight percent based on the weight of the composition.

5. The composition of claim 1, wherein the calcium carbonate is present at a concentration of about 25 weight percent to about 60 weight percent based on the weight of the composition.

6. The composition of claim 1, wherein the polyether siloxane copolymer is present at a concentration of at least about 0.01 weight percent based on the weight of the composition.

7. The composition of claim 1, wherein the polyether siloxane copolymer is present at a concentration of about 0.01 weight percent to about 0.5 weight percent based on the weight of the composition.

8. The composition of claim 1, wherein the styrene-butadiene polymer is present at a concentration of at least about 0.5 weight percent based on the weight of the composition.

9. The composition of claim 1, wherein the styrene-butadiene polymer is present at a concentration of about 0.5 weight percent to about 5 weight percent based on the weight of the composition.

10. The composition of claim 1, wherein:

the water is present at a concentration of about 30 weight percent to about 50 weight percent based on the weight of the composition;

the calcium carbonate is present at a concentration of about 25 weight percent to about 60 weight percent based on the weight of the composition;

the polyether siloxane copolymer is present at a concentration of about 0.01 weight percent to about 0.5 weight percent based on the weight of the composition; and

the styrene-butadiene polymer is present at a concentration of about 0.5 weight percent to about 5 weight percent based on the weight of the composition.

11. The composition of claim 1, wherein:

the water is present at a concentration of about 43 weight percent based on the weight of the composition;

the calcium carbonate is present at a concentration of about 35 weight percent based on the weight of the composition;

the polyether siloxane copolymer is present at a concentration of about 0.1 weight percent based on the weight of the composition; and

the styrene-butadiene polymer is present at a concentration of about 1.9 weight percent based on the weight of the composition.

12. The composition of claim 1, further comprising mica.

13. The composition of claim 1, further comprising talc.

14. The composition of claim 1, further comprising perlite.

15. The composition of claim 1, further comprising starch.

16. The composition of claim 1, further comprising cellulose ether.