Adsorbent compound for use in insulated glass windows

Abstract

In using partially alkali metal exchanged forms of FAU zeolite as selective adsorbents for use in insulated glass windows, particularly for use in a matrix in insulated glass windows, it has been discovered that significant reduction in the nitrogen loading on the zeolite results when the alkali metal content is maintained at a low level. For example, such FAU zeolites, particularly zeolite X which has been ion-exchanged with potassium ions to a level of between about 5 and about 75 equivalent mole percent indicate a nitrogen adsorption loading of between about 400 and 600 percent lower than unexchanged zeolite X and about 200 percent less than fully potassium exchanged zeolite X. The adsorbent is particularly useful in a sealant matrix for insulated glass windows and may be used in combination with zeolite A to reduce out-gassing problems.

Dependencies are inferred from the claim text.