Low viscosity liquid crystalline polymer compositions

C - Chemistry – Metallurgy – 08 – K

Patent

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Details

C08K 5/13 (2006.01) C08G 63/91 (2006.01) C08G 69/44 (2006.01) C08G 69/48 (2006.01) C08G 73/16 (2006.01) C08K 5/00 (2006.01) C08K 5/09 (2006.01)

Patent

CA 2327674

Liquid crystalline polyesters or poly(ester-amides) having improved melt viscosity, are made by reacting the polymer with limited amounts of a compound containing specified functionality, such as hydroxyl, carboxyl, or amine. The process may be carried out in a typical polymer melt mixing apparatus such as an extruder. The low viscosity polymer product of the claimed invention has surprising toughness and is particularly useful for encapsulation of electronic components.

L'invention concerne des polyesters ou des poly(ester-amides) cristallins liquides présentant une viscosité améliorée à l'état fondu. On prépare ces compositions en faisant réagir le polymère avec des quantités limitées d'un composé contenant une fonction spécifiée telle que hydroxyle, carboxyle, ou amine. Ce processus peut être réalisé dans un dispositif de malaxage de polymère en fusion courant tel qu'une extrudeuse. Ce produit polymère à faible viscosité présente une ténacité surprenante et s'avère particulièrement utile pour l'encapsulation de composants électroniques.

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