Composite material including rigid foam with inorganic fillers

C - Chemistry – Metallurgy – 08 – G

Patent

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Details

C08G 18/66 (2006.01) C08G 18/48 (2006.01) C08J 9/22 (2006.01) C08L 75/08 (2006.01)

Patent

CA 2616415

A composite material includes, in an exemplary embodiment a polyurethane foam and a plurality of inorganic particles dispersed therein. The polyurethane foam is formed from a reaction mixture that includes a first polyether polyol having a first molecular weight and a functionality of about 3 or less, a second polyether polyol having a second molecular weight less than the first molecular weight and a functionality of greater than about 3, and at least one isocyanate. The ratio of an amount of the first polyol in the reaction mixture to an amount of the second polyol in the reaction mixture is between about 1 :1 to about 5:1.

L'invention concerne une matière composite comprenant, dans un mode de réalisation d'exemple, une mousse de polyuréthanne et une pluralité de particules inorganiques dispersées dans cette mousse. Cette mousse de polyuréthanne est formée à partir d'un mélange réactionnel qui comprend un premier polyol de polyéther présentant un premier poids moléculaire et une fonctionnalité inférieure à 3 environ, un second polyol de polyéther présentant un second poids moléculaire inférieur au premier poids moléculaire et une fonctionnalité supérieure à 3 environ, et au moins un isocyanate. Le rapport d'une quantité du premier polyol du mélange réactionnel par rapport à une quantité du second polyol du mélange réactionnel est compris entre 1:1 environ et 5:1 environ.

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