Abstract: Highly viscous or heat distortion-resistant at least partially crosslinked polyamides are disclosed along with the process for making them. The process comprises reacting, under anhydrous conditions, a polyamide melt with a silane of the following formula ##STR1## wherein n=0, 1, or 2,Z is individually an organic radical which may, together with other Z groups and the silicon atom, form rings,A is individually a moisture hydrolyzable radical which may, together with other A groups and the silicon atom, form rings, andY is an organic radical containing a functional group which is capable of reacting with at least one of an amide, amino and carboxyl group of the polyamide to form a covalent bond,and then bringing the reaction product into contact with moisture to form the at least partially crosslinked polyamides.

Abstract: The instant invention relates to thermoplastically processable polyamides which are rendered flame retardant by means of a new flame retarding agent; the conversion product of cyanuric acid and triazine compounds having free --NH.sub.2 in a molar ratio of at least 2 triazine nuclei per mole of cyanuric acid. The properties of polyamide thermoplasts are changed only slightly through the incorporation of the new flame retarding agent.