Lightweight joint compound composition
In the present disclosure, a joint compound composition is disclosed. The joint compound composition comprises water, a cementitious filler, a mineral filler, and an elastomer wherein the joint compound composition exhibits a viscosity of 50 poise or less when measured at a temperature of 23° C. and shear rate of 100 s −1 and/or a yield stress of 1,500 dynes/cm 2 or less. The present disclosure is also directed to a method of making a joint compound composition. The method comprises combining and mixing water, a cementitious filler, a mineral filler, and an aqueous dispersion including an elastomer.
1. A joint compound composition comprising:
water,
a cementitious filler in an amount of 70 wt. % or less,
one or more mineral fillers, the total amount of mineral fillers in the joint compound composition being at least 0.5 wt. % to 8 wt. % or less based on the weight of the joint compound composition, and
an elastomer,
wherein the joint compound composition exhibits a viscosity of 25 poise or less to 2 poise or more when measured at a temperature of 23° C. and shear rate of 100 s −1 and/or a yield stress of 1,500 dynes/cm 2 or less to 100 dynes/cm 2 or more.
2. The joint compound composition of claim 1 , wherein the joint compound composition exhibits a viscosity of 25 poise or less to 2 poise or more when measured at a temperature of 23° C. and shear rate of 100 s −1 and a yield stress of 1,500 dynes/cm 2 or less to 100 dynes/cm 2 or more.
3. The joint compound composition of claim 1 , wherein the joint compound composition exhibits a viscosity of 20 poise or less to 2 poise or more when measured at a temperature of 23° C. and shear rate of 100 s −1 and a yield stress of 1,000 dynes/cm 2 or less to 100 dynes/cm 2 or more.
4. The joint compound composition of claim 1 , wherein the cementitious filler comprises calcium carbonate.
5. The joint compound composition of claim 4 , wherein the calcium carbonate is present in an amount of from 20 wt. % to 50 wt. % based on the weight of the joint compound composition.
6. The joint compound composition of claim 1 , wherein the one more mineral fillers comprises a silicate.
7. The joint compound composition of claim 1 , wherein the one or more mineral fillers comprises a pyrophyllite.
8. The joint compound composition of claim 1 , wherein the total amount of the one or more mineral fillers is at least 2 wt. % to 8 wt. % or less based on the weight of the joint compound composition.
9. The joint compound composition of claim 1 , wherein the elastomer comprises an elastomeric copolymer.
10. The joint compound composition of claim 1 , wherein the elastomer comprises a styrene-butadiene.
11. The joint compound composition of claim 1 , wherein the elastomer is present in an amount of from 0.01 wt. % to 5 wt. % based on the weight of the joint compound composition.
12. The joint compound composition of claim 1 , wherein the joint compound composition further comprises at least one surfactant comprising an anionic surfactant, a nonionic surfactant, or a mixture thereof.
13. The joint compound composition of claim 1 , wherein the joint compound composition further comprises a mineral oil, a silicone oil, or a mixture thereof.
14. The joint compound composition of claim 1 , wherein the joint compound composition further comprises a siloxane polymer.
15. The joint compound composition of claim 14 , wherein the siloxane polymer is present in an amount of from 0.001 wt. % to 5 wt. % based on the weight of the joint compound composition.
16. The joint compound composition of claim 1 , wherein the joint compound composition further comprises a binder comprising an acetate polymer, a cellulose polymer, or a mixture thereof.
17. The joint compound composition of claim 16 wherein the binder is present in an amount of from 0.01 wt. % to 10 wt. % based on the weight of the joint compound composition.
18. The joint compound composition of claim 1 , wherein the joint compound composition further comprises a perlite.
19. The joint compound composition of claim 18 , wherein the perlite is present in an amount of from 1 wt. % to 15 wt. % based on the weight of the joint compound composition.
20. A method of making a joint compound composition, the method comprising:
combining and mixing water, a cementitious filler, one or more mineral fillers wherein the total amount of more mineral fillers in the joint compound composition is at least 0.5 wt. % to 8 wt. % or less based on the weight of the joint compound composition, and an aqueous dispersion including an elastomer, at least one surfactant, and a defoamer comprising a mineral oil, a silicone oil, or a mixture thereof, wherein the joint compound composition exhibits a viscosity of 25 poise or less to 2 poise or more when measured at a temperature of 23° C. and shear rate of 100 s −1 and/or a yield stress of 1,500 dynes/cm 2 or less to 100 dynes/cm 2 or more.
21. The joint compound composition of claim 1 , wherein the one or more mineral fillers comprise a phyllosilicate.