C - Chemistry – Metallurgy – 08 – J
Patent
C - Chemistry, Metallurgy
08
J
C08J 9/04 (2006.01) B32B 5/20 (2006.01) B60R 13/08 (2006.01) C08J 9/10 (2006.01)
Patent
CA 2112648
A dry, initially non-tacky, expansible, shaped and formed sealant and baffle component is provided for sealing and providing an acoustic baffle for cavities in the hollow structural components of a vehicle body or the like, which during the manufacturing operation is conveyed through a bake oven at an elevated temperature. The component is made up of a metal ion neutralized ethylene-.alpha.,.beta. ethylenically unsaturated carboxylic acid copolymer (ionomer), a blowing agent, and a tackifier, and optionally with an additive polymer and a cross-linking agent. The blowing agent is selected to be activated at the temperature of the bake oven so that the shaped and formed component expands in the body cavity to seal the cavity and prevent ingress of moisture, dust and other contaminating materials and particles, as well as to form a sound barrier therein.
Constituant de scellant et de cloison séparatrice, sec, non collant au départ, expansible, façonné pour étanchéiser et isoler acoustiquement des cavités dans les parties structurales creuses d'une carrosserie de voiture ou d'une autre composante de même type, qui pendant la fabrication est convoyée à travers un four à haute température. Le constituant renferme un copolymère (ionomère) d'éthylène et d'acide carboxylique avec insaturations éthyléniques en alpha, bêta, et neutralisation par un ion métallique, un gonflant, un agent collant et, facultativement, un polymère d'addition et un réticulant. Le gonflant devient actif à la température du four; le constituant remplit alors les cavités de la carrosserie, empêchant l'humidité, la poussière et d'autres matières contaminantes de s'y introduire, tout en formant également une barrière acoustique.
Boos Roman C.
Hanley John L.
Gowling Lafleur Henderson Llp
Sika Corporation
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