Polyamide composition containing electrically conductive carbon

摘要

A polyamide composition which provides moldings having a significantly reduced percolation threshold and an improved electrical conductivity is provided. The composition contains a) at least 40 parts by weight of a polyamide; b) from 0.15 to 25 parts by weight of an electrically conductive carbon; c) from 0.3 to 8 parts by weight of an oligofunctional compound; and, optionally, d) conventional auxiliaries and additives, wherein the electrically conductive carbon comprises at least one of carbon nanotubes and graphene, the oligofunctional compound comprises at least one functional group reactive with reactive groups on a surface of the electrically conductive carbon and at least one functional group reactive with an end group of the polyamide, and the sum of the parts by weight of the components a) to d) is 100.

主权项

1. A polyamide composition, comprising:
a) at least 40 parts by weight of a polyamide; b) from 0.15 to 25 parts by weight of an electrically conductive carbon; c) from 0.3 to 8 parts by weight of an oligofunctional compound; and, optionally, d) conventional auxiliaries and additives, wherein the electrically conductive carbon comprises at least one of carbon nanotubes and graphene, the oligofunctional compound comprises at least one functional group reactive with reactive groups on a surface of the electrically conductive carbon and at least one functional group reactive with an end group of the polyamide, wherein the at least one functional group reactive with reactive groups on a surface of the electrically conductive carbon and the at least one functional group reactive with an end group of the polyamide of the oligofunctional compound are selected from the group of reactive functional groups consisting of an oxazinone group, an oxazolone group, an oxazoline group, an isocyanate group, a carbodiimide group, a N-acyllactam group, a N-acylimide group, an aromatic or aliphatic carbonic ester group, and an epoxide group, with the proviso that compounds which have at least two carbonic ester groups and no further different reactive groups and compounds which contain at least two carbodiimide groups are combined only with amino-functionalized carbon nanotubes, and that compounds which have at least one epoxide group have a number average molecular weight Mn of not more than 8000 g/mol; and the sum of the parts by weight of the components a) to d) is 100.