Abstract: The present invention relates to compositions comprising a copolymer comprising at least one segment of a polyolefin and at least one segment of a polyamide, said composition additionally comprising piperazine pyrophosphate and, if appropriate, a coloring additive. The present invention also relates to a method for the manufacture of these compositions and to the use of the latter in the manufacture of jacket for metal cables, of electrical parts, such as electrical connectors or electrical engineering housings, of thermal protection jackets or sleeves, of injection-molded parts for electronic equipment, such as computers and telephones, of monolayer or multilayer tubes or of bellow tubes, preferably in the manufacture of jacket for metal cables. Finally, it also relates to the electronic, electrical or thermal protection components comprising said composition.

Abstract: The invention concerns flexible high thermomechanical stress-resistant and fire retardant halogen-free thermoplastic compositions, comprising a polyamide block-graft copolymer consisting of a trunk and on average at least one polyamide graft, wherein the grafts are bound to the trunk by the residues of an unsaturated monomer (X) having a function capable of reacting with a polyamide at the amine-terminal, the unsaturated monomer residues (X) being bound on the trunk by grafting or copolymerization from the double bond thereof. The invention is characterized in that the compositions comprise a mixture: 50 to 70 wt. % of polyamide block copolymer, 25 to 35 wt. % of a flame-retardant agent selected among ammonium phosphates, phosphinates, pyrophosphates, and polyphosphates, about 2 wt. % of zeolite, or hydrotalcitemolecular sieves.

Abstract: The present invention relates to flame-retarded flexible thermoplastic compositions of high thermomechanical strength, containing no halogen compound, comprising a graft copolymer containing polyamide blocks and composed of a polyolefin backbone and on average at least one polyamide graft, in which the grafts are attached to the backbone by the radicals of an unsaturated monomer (X) having a function capable of reacting with an amine-terminal polyamide, the radicals of the unsaturated monomer (X) being fixed to the backbone by grafting or copolymerization from its double bond, wherein said composition comprises, in a mixture: 50% to 70% by weight of the graft copolymer containing polyamide blocks, 25% to 35% by weight of a flame retardant selected from ammonium phosphates, phosphinates, pyrophosphates, and polyphosphates, approximately 2% by weight of molecular sieve, such as a zeolite, or of hydrotalcite(s).