One-component chemically curing hot applied insulating glass...

C - Chemistry – Metallurgy – 09 – K

Patent

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Details

C09K 3/10 (2006.01) C03C 27/10 (2006.01) C03C 27/12 (2006.01) C08L 83/04 (2006.01) C08L 101/00 (2006.01)

Patent

CA 2234668

This invention relates generally to sealants for insulating glass units. More specifically this invention is a one-component, hot applied, chemically curing sealant for edge sealing insulating glass units. The sealant contains a thermoplastic hot melt resin blended with an atmospheric curing resin. The hot melt resin functions as the meltable component during the initial application, and supplies strength immediately upon cooling. The polymer phase then begins to cure by reaction with atmospheric oxygen and/or moisture to form a cross- linked thermoset elastomer which is temperature resistant. At this point, the hot melt resin functions as an inert plasticizer within the cured polymer phase. The sealant of the present invention may additionally include plasticizers, fillers, pigments, catalysts and the like.

Cette invention se rapporte de manière générale à des matériaux d'étanchéité destinés à des unités de vitrage isolant. Plus spécifiquement, cette invention est un matériau d'étanchéité monocomposant pour vitrage isolant, appliqué à chaud et durci chimiquement, destiné à l'étanchéité des bords d'unités de vitrage isolant. Ce matériau d'étanchéité contient une résine thermoplastique thermofusible mélangée à une résine durcissant au contact de l'atmosphère. La résine thermofusible, qui constitue le composant fusible au cours de l'application initiale, se solidifie instantanément en refroidissant. La phase polymère commence alors à durcir par réaction avec l'oxygène et/ou l'humidité atmosphérique pour former un élastomère thermodurci réticulé qui résiste à la chaleur. A ce stade, la résine thermofusible sert d'agent plastifiant inerte dans la phase polymère durcie. Le matériau d'étanchéité de la présente invention peut également comporter des agents du type plastifiants, matériaux de remplissage, pigments, catalyseurs et autres composants analogues.

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