Selectively permeable zeolite adsorbents and sealants made therefrom
First Claim
1. A multiple glazed window having two parallel panes of glass spaced apart to leave an air space between the panes with peripheries of the two panes being sealed with a sealant strip to close the air space, said sealant including an adsorbent therein, said adsorbent comprising a zeolite, having pores with apertures large enough to permit entry of oxygen and nitrogen molecules through said pore apertures, which is treated with a paraffinic, naphthenic or aromatic oil and outgassed under heat or under heat and vacuum to render the zeolite permeable to water vapor and essentially impermeable to nitrogen and oxygen molecules.
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Accused Products
Abstract
The invention relates to an improved adsorbent, essentially impermeable to oxygen and nitrogen but permeable to water vapor, and to sealants incorporating said adsorbent. The adsorbent comprises outgassed zeolite having pores with apertures large enough to permit entry of gases such as oxygen and nitrogen into the pore spaces and having on its surface, covering the pore apertures, a fluid which is essentially impermeable to nitrogen and oxygen molecules and yet permeable to water vapor. The zeolite adsorbent, and sealants prepared from the zeolite, are particularly useful in the fabrication of thermal insulating glazed windows having a sealed air pocket.
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Citations
3 Claims
- 1. A multiple glazed window having two parallel panes of glass spaced apart to leave an air space between the panes with peripheries of the two panes being sealed with a sealant strip to close the air space, said sealant including an adsorbent therein, said adsorbent comprising a zeolite, having pores with apertures large enough to permit entry of oxygen and nitrogen molecules through said pore apertures, which is treated with a paraffinic, naphthenic or aromatic oil and outgassed under heat or under heat and vacuum to render the zeolite permeable to water vapor and essentially impermeable to nitrogen and oxygen molecules.
Specification