C - Chemistry – Metallurgy – 04 – B
Patent
C - Chemistry, Metallurgy
04
B
C04B 41/81 (2006.01) C04B 41/52 (2006.01) C04B 41/89 (2006.01) F16D 69/02 (2006.01)
Patent
CA 2202768
Prior to applying an impregnation composition constituted by a solution of at least one phosphate, a part made of composite material is treated in depth by means of an aqueous solution that penetrates into the open internal pores of the composite material, and is then dried. The aqueous solution contains an additive which, after drying, imparts to the composite material, increased wettability by the impregnation composition. The additive contained in the aqueous solution is preferably constituted by at least one wetting agent that is soluble in water and non-ionic, such as an oxyethylenated fatty acid, an oxyethylenated fatty alcohol, an oxyethylenated alkyl-phenol or an ester of a high polyol.
Avant application de la composition d'imprégnation constituée par une solution d'au moins un phosphate, la pièce en matériau composite est traitée en profondeur au moyen d'une solution aqueuse pénétrant au sein de la porosité interne ouverte du matériau composite, et séchée. La solution aqueuse contient un additif qui, après séchage, confère au matériau composite une mouillabilité accrue par la composition d'imprégnation. De préférence l'additif contenu dans la solution aqueuse est constitué par au moins un agent surfactif soluble dans l'eau et non ionique, tel qu'un acide gras oxyéthyléné, un alcool gras oxyéthyléné, un alkyl-phénol oxyéthyléné ou un ester de poly-ol supérieur.
Balhadere Aline
Bernard Bruno
Thebault Jacques
Messier-Bugatti
Sim & Mcburney
Societe Europeenne de Propulsion
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