US 12,479,767 B2
Gypsum cement with reduced permeability
Helen Huang, New Albany, OH (US); and Steven Badger, Pittsburgh, PA (US)
Assigned to Owens Corning Intellectual Capital, LLC, Toledo, OH (US)
Filed by Owens Corning Intellectual Capital, LLC, Toledo, OH (US)
Filed on Sep. 29, 2021, as Appl. No. 17/488,402.
Prior Publication US 2023/0096189 A1, Mar. 30, 2023
Int. Cl. C04B 28/14 (2006.01); C03C 11/00 (2006.01); C04B 24/24 (2006.01); C04B 24/42 (2006.01); E04B 1/68 (2006.01); F16L 59/02 (2006.01); F16L 59/18 (2006.01); C04B 103/65 (2006.01); C04B 111/00 (2006.01); C04B 111/27 (2006.01); E04B 1/62 (2006.01)
CPC C04B 28/14 (2013.01) [C03C 11/007 (2013.01); C04B 24/24 (2013.01); C04B 24/42 (2013.01); E04B 1/6801 (2013.01); F16L 59/028 (2013.01); F16L 59/18 (2013.01); C04B 2103/65 (2013.01); C04B 2111/00586 (2013.01); C04B 2111/00681 (2013.01); C04B 2111/00706 (2013.01); C04B 2111/27 (2013.01); E04B 1/62 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A cellular glass insulation system comprising
a plurality of cellular glass insulation segments, wherein each cellular glass insulation segment comprises a length, two side joint sections extending the length of the cellular glass insulation segment, and two end joint sections;
and a modified gypsum cement applied to at least one joint section between adjacent cellular glass insulation segments;
wherein the modified gypsum cement is formed from a solid component comprising a gypsum cement base and a liquid component comprising water and a waterproofing element;
wherein the modified gypsum cement comprises the solid component and the liquid component in a weight ratio of about 1:1 to 3:1;
wherein the waterproofing element is a wax emulsion and is present in an amount of 5% to 40% by weight of the gypsum cement base; and
wherein the modified gypsum cement has a water vapor transmission rate of less than 0.002 perm-inch.