| abstract |
The present invention relates to a flame retardant composition containing the following, the total of which is 100 parts by weight:n n n 50 to 75 parts by weight of a blend of polyamide (A) and polyolefin (B),n n n 25 to 50 parts by weight of a blend containing the following three products, the sum of which is 25 to 50 parts by weight:n n n 0.1 to 48.8 parts by weight of flame retardant,n n n 0.1 to 30 parts by weight of a phosphorus-containing plasticizer,n n n 0.1-10 parts by weight of zeolite.n n n This composition has a V0 or V1 rating according to the UL94-VB test when performing a fire test on a 1.6 mm thick test piece. They have many advantages, in particular, the elongation at break exceeded 100%, measured according to ISO R 527-1B. For impact strengths, they exhibit non-brittle behavior in multiaxial shock at room temperature according to ISO 6603-2 (speed of 7.7 m / s). They retain at least 50% of their mechanical properties after aging for several days in hot air at 120 ° C.n n n Such compositions are useful for the insulation and protection of electrical cables and optical fibers, and for molding electrical cases and connectors. |