Flexible polymer element as toughening agent in prepegs

C - Chemistry – Metallurgy – 08 – J

Patent

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C08J 5/24 (2006.01) C08J 3/24 (2006.01) C08J 5/04 (2006.01)

Patent

CA 2420331

A flexible polymer element for a curable composition wherein the flexible polymer element is in solid phase and adapted to undergo at least partial phase transition to fluid phase on contact with a component of the curable composition in which it is soluble at a temperature which is less than the temperature for substantial onset of gelling and/or curing of the curable composition; a method for the preparation thereof, a support structure or carrier for a curable composition comprising the at least one flexible polymer element together with reinforcing fibres, configurations of support structures and carriers, methods for preparation thereof, a curable composition comprising the at least one flexible polymer element or the support structure or carrier and a curable resin matrix, a kit of parts comprising the components thereof and a method for selection thereof, a method for preparation and curing thereof, and a cured composite or resin body obtained thereby, and known and novel uses thereof.

La présente invention concerne un élément polymère flexible destiné à une composition durcissable. En l'occurrence, l'élément polymère flexible, qui se présente en phase solide, est apte à subir au moins une transition de phase partielle en phase fluide au contact d'un contact avec un composant de la composition durcissable dans laquelle il est soluble à une température inférieure à la température correspondant sensiblement à la température de prise en gel et/ou de durcissage de la composition durcissable. L'invention concerne également un procédé d'élaboration correspondant, une structure support ou un support pour la composition durcissable comprenant cet élément polymère flexible associé à des fibres de renfort, des configurations de structures supports et de supports, des procédés d'élaboration correspondant, une composition durcissable comprenant cet élément polymère flexible ou cette structure support ou ce support et une matrice en résine durcissable, un nécessaire de pièces comprenant les composants correspondants et un procédé pour les sélectionner, un procédé pour l'élaboration et le durcissage de ces articles, et un composite durci ou un corps de résine obtenu de cette façon, et des utilisations connues et nouvelles correspondantes.

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