Polyisocyanurate boards with reduced moisture absorbency and...

E - Fixed Constructions – 04 – D

Patent

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Details

E04D 3/35 (2006.01) B32B 5/18 (2006.01) B32B 5/20 (2006.01) B32B 27/08 (2006.01) B32B 27/40 (2006.01) E04C 2/296 (2006.01)

Patent

CA 2217660

ABSTRACT OF THE DISCLOSURE A composite iso board (10) comprises a foam core (11) selected from the group consisting of polyisocyanurate and polyurethane materials and mixturesthereof; and first and second facers (12, 13), between which the foam core is sandwiched, the facers comprising a sheet selected from the group consisting of polyamides and polycarbonates. A method of reroofing a roof comprises applying composite iso boards of the present invention to a roof deck; and, applying a weather protective layer over the iso boards. A continuous method of making a composite iso board comprising the steps of feeding a first layer offacer material into a laminator (24); depositing a foamable polymer liquid onto the first layer (12); feeding a second layer of facer material (13) into the laminator above the foamable polymer liquid; allowing the polymer liquid to risebetween the first and second facer materials forming polymer foam (42) of a predetermined thickness; curing the polymer foam under heat to create the iso board; cutting the iso board to desired lengths; and stacking said boards in bundles.

Cette invention concerne un panneau composite isotherme (10) comprenant une âme en mousse (11) du groupe des polyisocyanurates et polyuréthannes et des mélanges de ces matériaux; une première et une seconde semelles (12, 13) collées de part et d'autre de l'âme en mousse, chacune étant une feuille du groupe des polyamides et des polycarbonates. Une méthode de réfection de couverture comprend l'application des panneaux composites isothermes objets de la présente invention sur le platelage du toit et l'application d'une couche de protection contre les intempéries sur lesdits panneaux. L'invention concerne également une méthode de production en continu des panneaux composites isothermes qui comprend les étapes suivantes : acheminement d'une première semelle dans une contrecolleuse (24); dépôt d'un polymère liquide expansible sur la première semelle (12); acheminement de la seconde semelle (13) dans la contrecolleuse, au-dessus du polymère liquide susmentionné; expansion du polymère liquide entre les deux semelles pour constituer une mousse polymère (42) d'épaisseur prédéterminée; cuisson de la mousse polymère pour former le panneau isotherme; découpe du panneau en longueurs prédéterminéEs et empilage des panneaux obtenus.

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