C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
C08L 77/00 (2006.01) C08K 5/16 (2006.01) C08K 5/49 (2006.01) C08L 23/02 (2006.01) C08L 23/06 (2006.01) C08L 23/08 (2006.01) C08L 51/06 (2006.01) C08L 77/02 (2006.01) C08L 77/06 (2006.01) C09K 21/14 (2006.01) C08L 23/04 (2006.01) C08L 23/10 (2006.01)
Patent
CA 2432857
Fire retarded compositions comprising by weight, the total being 100 parts: 50 to 75 parts of a blend of a polyamide (A) and polyolefin (B), 25 to 50 parts of a blend comprising: 0.1 to 48.8 parts of a fire retardant, 0.1 to 30 parts of a phosphorus- containing plasticizer, 0.1 to 10 parts of a zeolite, the total of these three products being between 25 and 50. The compositions have a V0 or V1 classification according to the UL94-VB test when a fire test is carried out on test specimens 1.6 mm in thickness. They have many advantages, in particular the elongation at break measured according to ISO R 527-1B exceeds 100%. As regards the impact strength, they have a non-brittle behaviour in multiaxial impact at room temperature according to ISO 6603-2 (at a rate of 7.7 m/s). They retain at least 50% of their mechanical properties after ageing for seven days at 120°C in hot air. These compositions are useful for insulating and protecting electrical cables and optical fibres and for moulding electrical cases and connectors.
Blondel Philippe
Brule Benoit
Flat Jean-Jacques
Frenois Nicolas
Atofina
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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