Self reinforced composite of thermotropic liquid crystal...

C - Chemistry – Metallurgy – 08 – L

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Details

C08L 67/03 (2006.01) C08L 67/00 (2006.01) C09K 19/38 (2006.01)

Patent

CA 2086931

Blend of two or more thermotropic liquid crystal polymers and process for preparing same. Blends of this invention contain at least two, preferably only two, thermotropic liquid crystal polymers which are melt processable. These liquid crystal polymers are wholly aromatic polyesters. At least two polymers in the blend are processable in the melt phase and phase separated in the solid phase. Solid reinforcing agents may be present. but are not necessary and in any case must be in the solid phase at temperatures at which the blend is melt processable. Products of this invention are formed in the melt phase under high strain conditions. Polymer composites of this invention are especially useful in high performance applications where high tensile strength, high modulus and good impact resistance are required or at least highly desirable.

Mélange de deux ou plusieurs polymères de cristaux liquides thermotropiques et procédé de préparation de ce mélange. Les mélanges selon l'invention contiennent au moins deux, de préférence seulement deux, polymères de cristaux liquides qui peuvent être traités à l'état fondu. Ces polymères de cristaux liquides sont des polyesters entièrement aromatiques. Au moins deux polymères constituant le mélange peuvent être traités en phase fondue et séparés en phases dans la phase solide. Des agents de renforcement solides peuvent être présents mais ne sont pas nécessaires et ils ne doivent en aucun cas être en phase solide à des températures auxquelles le mélange peut être traité à l'état fondu. Les produits selon cette invention sont formés en phase fondue dans des conditions de forte contrainte.

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