C - Chemistry – Metallurgy – 08 – J
Patent
C - Chemistry, Metallurgy
08
J
C08J 5/00 (2006.01)
Patent
CA 2757525
The present invention relates to the field of composite structures, overmolded composites structures and processes for their preparation, particularly it relates to the field of polyamide composite structures. The disclosed composite structures have a surface, which surface has at least a portion made of a surface polyamide resin composition, and comprise a fibrous material se-lected from non-woven structures, textiles, fibrous battings and combinations thereof, said fibrous material being impregnated with a matrix resin composition, wherein the surface polyamide resin composition is selected from polyamide compositions com-prising a blend of a) one or more semi-aromatic polyamides (A) containing repeat units derived from aromatic dicarboxylic acids and aliphatic diamines, and b)one or more fully aliphatic polyamides (B) selected from the group consisting of polyamides con-taining repeat units derived from aliphatic dicarboxylic acids and aliphatic diamines, polyamides containing repeat units derived from aliphatic aminocarboxylic acids, and polyamides derived from lactams.
La présente invention concerne le domaine des structures composites, les structures composites surmoulées et leurs procédés de préparation. En particulier, l'invention concerne le domaine des structures composites de polyamide. Les structures composites décrites ont une surface, laquelle surface a au moins une partie faite d'une composition de résine de polyamide de surface, et comprend un matériau fibreux choisi parmi les structures non tissées, les textiles, les nappes ouatées fibreuses et les combinaisons de ceux-ci, ledit matériau fibreux étant imprégné par une composition de résine matrice, la composition de résine de polyamide de surface étant choisie parmi les compositions de polyamide comprenant un mélange de a) un ou plusieurs polyamides semi-aromatiques (A) contenant des unités de répétition issues d'acides dicarboxyliques aromatiques et de diamines aliphatiques, et b)un ou plusieurs polyamides entièrement aliphatiques (B) choisis dans le groupe constitué par les polyamides contenant des unités de répétition issues d'acides dicarboxyliques aliphatiques et de diamines aliphatiques, les polyamides contenant des unités de répétition issues d'acides aminocarboxyliques aliphatiques et les polyamides issus de lactames.
Kirchner Olaf Norbert
Wakeman Martyn Douglas
E. I. Du Pont de Nemours And Company
Torys Llp
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