Polyamide, method for its manufacture and compounds...

C - Chemistry – Metallurgy – 08 – G

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Details

C08G 69/02 (2006.01) C08G 69/04 (2006.01) C08G 69/14 (2006.01) C08G 69/16 (2006.01) C08G 69/36 (2006.01) C08G 69/48 (2006.01) C08K 7/02 (2006.01) C08L 77/00 (2006.01)

Patent

CA 2239105

The invention relates to a polyamide, a method for its manufacture and compounds containing it. It involves, specifically, a polyamide obtained through polymerization of an aminoacid or lactam such as caprolactam in the presence of a compound having at least three functions capable of generating an amide function by reacting either with an amine function or with an acid fonction. The polyamide obtained in this way has at least part of these molecular chains in a star formation, the other part being in linear form. This polymer is useful, <u>inter alia</u>, in the manufacture of compounds that are to be molded, since it has minimal viscosity in a melted medium while still retaining the mechanical properties of a linear polymer.

La présente invention concerne un polyamide, un procédé de fabrication de celui-ci et des compositions le contenant. Elle concerne plus particulièrement un polyamide obtenu par polymérisation d'un aminoacide ou un lactame tel que le caprolactame en présence d'un composé comprenant au moins trois fonctions capables de former une fonction amide par réaction soit avec une fonction amine soit une fonction acide. Le polyamide ainsi obtenu comprend au moins une partie de ces chaînes moléculaires sous une structure étoile, l'autre partie étant sous forme linéaire. Ce polymère est notamment utile pour la fabrication de compositions destinées, par exemple, à être moulées car il présente une faible viscosité en milieu fondu tout en conservant les propriétés mécaniques d'un polymère linéaire.

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