| 摘要 |
The invention concerns a thermofusible polyamide, crosslinkable in the presence of water by means of alkoxysilane groups which it contains, said polyamide being obtained from in particular diacid comonomers and diamine comonomers. The invention aims at providing said type of polyamide, capable of behaving both as a thermoplastic polymer and as a thermosetting polymer, having both high mechanical resistance and high elongation at break, as well as high flexibility and considerable thermal resistance to high temperature. This aim is achieved by said alkoxysilylated crosslinkable polyamide in that the diacid comonomers constituting it comprise C36 fatty acid dimers, its molar mass Mw is less than 20,000 D, when crosslinked, its flexibility F >/= 40 (TF test) and its temperature resistance theta c >/= 180 DEG C (Saft test) and said alkoxysilylated crosslinkable polyamide is obtained by direct grafting of a precursor (III) of alkoxysilane grafts comprising a grafting function R<g> capable of binding directly with the COOH, NH2 or NHCO functions of the polyamide. The invention also concerns a method for preparing such an alkoxysilylated crosslinkable polyamide, and an adhesive based thereon.
|
