B - Operations – Transporting – 32 – B
Patent
B - Operations, Transporting
32
B
B32B 27/40 (2006.01) B29C 70/02 (2006.01) B29C 70/30 (2006.01) E04H 12/00 (2006.01)
Patent
CA 2595201
There is provided a multi-layered composite article having an inner core of a first composite material and one or more than one outer layers of a second composite material, the second composite material comprising an aliphatic isocyanate polyurethane overlaying the inner core. A method of manufacturing such a composite article is also provided. The method comprises providing a core comprising a reinforcement impregnated with a first resin; mixing an aliphatic isocyanate component and a polyol component to produce a reaction mixture; impregnating a second reinforcement with the reaction mixture to produce an impregnated reinforcement; applying the impregnated reinforcement over an outside surface of the core; and allowing the reaction mixture to set to produce a composite article with one or more than one outer layers of aliphatic isocyanate composite material. The concentration of aliphatic isocyanate in the second composite material or in the reaction mixture is greater than the concentration of aliphatic isocyanate in the first resin or first composite material.
La présente invention concerne un objet composite à couches multiples comportant un noyau interne d~un premier matériau composite et une ou plusieurs couches externes d~un second matériau composite, le second matériau composite comprenant un polyuréthane d~isocyanate aliphatique recouvrant le noyau interne. La présente invention concerne également un procédé de fabrication d~un tel objet composite. Le procédé comprend la fourniture d~un noyau comprenant un renfort imprégné d~une première résine ;le mélange d~un composant d~isocyanate aliphatique et d~un composant polyol pour produire un mélange réactionnel ; l~imprégnation d~un second renfort avec le mélange réactionnel pour produire un renfort imprégné ;l~application du renfort imprégné sur une surface externe du noyau ; et le durcissement du mélange réactionnel pour produire un objet composite comportant une ou plusieurs couches externes du matériau composite d~isocyanate aliphatique. La concentration en isocyanate aliphatique dans le second matériau composite ou dans le mélange réactionnel est supérieure à la concentration en isocyanate aliphatique dans la première résine ou dans le premier matériau composite.
Berksoy Ebise Mualla
Slaback David
Gowling Lafleur Henderson Llp
Resin Systems Inc.
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