Adhesive bonding process for aluminium and/or aluminium alloy

Details Adhesive bonding process for aluminium and/or aluminium alloy Adhesive bonding process for aluminium and/or aluminium alloy

C - Chemistry, Metallurgy

09

J

C09J 5/02 (2006.01) C23C 22/68 (2006.01)

Patent

CA 2348300

The durability of a bonded aluminium alloy and/or Alclad (Trade Mark) material joint can be improved by a two stage pre-treatment process in which after the surfaces to be joined have been degreased, a first solution BTESE and/or BTMSE in water, with or without methanol and/or ethanol, is applied to the degreased surfaces dried and coated with a second solution of .gamma.- glycidoxypropyltrimethoxysilane, an amino silane, .gamma.- aminopropyltriethoxysilane and/or trimethoxyvinylsilane in water with or without methanol and/or ethanol and drying prior to the application of an epoxy adhesive coating to the dried second solution surfaces, bonding and curing.

Il est possible d'améliorer la durabilité de joints fixés par collage en alliage en aluminium et/ou en Alclad (marque de commerce) grâce à un traitement préalable en deux étapes, dans le cadre duquel, une fois que les surfaces à rendre jointives ont été dégraissées, on applique une première solution aqueuse de 1,2-Bis(triéthoxysilyl)éthane (BTESE) et/ou de 1,2-Bis(triméthoxysilyl)éthane (BTMSE), avec ou sans méthanol et/ou éthanol, sur celles-ci. Après séchage de ces surfaces dégraissées, on les enduit d'une seconde solution aqueuse de .gamma.-glycidoxypropyltriméthoxysilane, un amino silane, de .gamma.-aminopropyltriéthoxysilane et/ou de triméthoxyvinylsilane avec ou sans méthanol et/ou éthanol. On les laisse ensuite sécher avant d'appliquer un revêtement adhésif époxyde sur les surfaces enduites de la seconde solution. On colle ensuite et on laisse prendre.

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