| abstract |
The invention relates to a composition based on fireproof polypropylene for textile and technical fibers, exhibiting low flammability characteristics. According to the invention, the melt-state polypropylene is added at a temperature of 170 ... 205 ° C using a flame retardant system consisting of dimethyl methylphosphonate 1.0 ... 12.0% relative to the polymer mass and / or tris - (2-chloroethyl) phosphate 1.0 ... 10% relative to the polymer mass in the presence or absence of antimony trioxide in concentration up to 1.2% relative to the polymer. Addition is done in a single phase on a double-extruder extruder, giving a homogeneous polymer with good reliability properties, without the addition of plastifins. |