C - Chemistry – Metallurgy – 08 – J
Patent
C - Chemistry, Metallurgy
08
J
C08J 9/00 (2006.01)
Patent
CA 2659059
Expandable polymer compositions are used to reinforce or provide various types of insulation to cavities in structural elements. The polymer compositions include at least two different segments, which may or may not be joined. At least one of the segments will expand before another segment when heated. The fixst-to- expand segment forms a physical barrier to the expansion of later-expanding segments, thereby restricting the expansion of the later-expanding segment in at least one direction. In this manner, the location of the expanded polymer within the cavity can be easily and inexpensively controlled.
La présente invention concerne des compositions de polymère expansible employées pour renforcer ou pour fournir divers types d'isolation à des cavités dans des éléments structurels. Les compositions de polymère comprennent au moins deux segments différents, qui peuvent être ou ne pas être joints. Au moins un des segments se dilatera avant un autre segment quand il est chauffé. Le premier segment se dilatant constitue une barrière physique pour les segments se dilatant ensuite, restreignant ainsi la dilatation du segment se dilatant ensuite en au moins une direction. De cette manière, l'endroit où se trouve le polymère dilaté dans la cavité peut être contrôlé facilement et à peu de frais.
Allen Mark P.
Billotto Frank V.
Flavin Frank J.
Dow Global Technologies Inc.
Smart & Biggar
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