Insulated window sealant

Since then, uses have shifted more toward civilian applications. Polysulfides have unusually good resistance to solvents and to the environment and good low temperature properties. This makes them particularly useful in a variety of sealant applications. For example, the outstanding resistance of polysulfides to petroleum (qv) products has made them the standard sealant for virtually all aircraft integral fuel tanks and bodies. Another important application is in insulating glass window sealants (qv). Sealants based on liquid polysulfides have had an excellent record since the 1950s and are the worldwide market leader in this application. 

The automotive industry usually eites technieal shortcomings rather than health eonsiderations for attempting to reduce its dependence on PVC in vehiele eomponents. Flexible PVC has been used in the past in underseal, instrument panels, wiring insulation, weatherstrip, window sealants, body side protection strips, door panels, seats, armrests and sun visors. Many of these applications require a soft, flexible material that used to be diffieult to produce without PVC, but can now be made using a modified polyolefin formulation. 

Many of the things that are used each day are bonded or assembled with adhesives, or sealed with sealants your table and ail the furniture, the foam cushioning of your seat, electronic parts in your computer, the double-insulated window, pressure-sensitive tapes and labels, your shoes, the food and other packaging, the carpet and floor coverings, the wallpaper, many parts in your car, many structures in airplanes, the PVC pipes in the kitchen, perhaps the tubes of your bicycle, the liner in some garments, shirt collars, the deflection yokes in your TV set, the metal base of electrical bulbs, children s toys, baby diapers and feminine napkins, and many other things — even this book It would take too much time to list everything. 

Sealants for insulated glass windows are based on butyl polymers. These sealants have excellent weathering and ageing, low-moisture vapour transmission and are non-fogging [66]. 

The use of two-component silicone sealants as perimeter seals for insulated glass window units was mentioned earlier recent trends in the construction of curtainwall buildings are towards the use of both two-part and one-part silicone adhesive sealants to bond these prefabricated glass panels to the metal elements of a building s structure, so that they function as structural adhesives in addition to acting as weatherproofing sealants to prevent the intrusion of air and water. 

Glazing - Linseed oil based putties were extensively used in the past for glazing applications. Newer glazing sealants include polysulfide, silieone, and acrylic emulsion. Butyl tape, polysulfide and silicone sealants are used in the manufacture of insulated glass. Safety glass door and window panels ean be made by sandwiching a layer of polyvinyl butyral film between two layers of glass. 

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