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6606517 
Legal Material 
Patent 
Lightweight joint treatment formulation 
Ayambem, A 
2004 
National Gypsum Properties, LLC, Charlotte, NC, USA 
2 
BCI:BCI200400411335 
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.