Fire-resistant polymer materials for high-temp. applications - contain high- or low-pressure polyethylene@, polypropylene@ or polystyrene, with dried water-glass and/or dried lignin and/or zeolite

摘要

Polymer materials with high fire resistance (I), contain prim. or sec. thermoplastics and fillers for parts which are used at high temp., e.g. in metallurgical processes. (I) contain 60-97 wt.% high- or low-pressure polyethylene, polypropylene or polystyrene, or a mixt. contg. 0.1-75 wt.% of each component (II), and 3-40 wt.% dried water-glass (III) and/or 1-30 wt.% dried lignin and/or 5-30 wt.% temp.-activated zeolite. (I) are produced, e.g. in the form of tubes, by drying (III) at 100-210 deg.C, grinding to 0.3-1 mm particle size, mixing with polymer (II) and extruding at 90-200 deg C (i.e. at least 10-15 deg C below the drying temp. for III). USE/ADVANTAGE - (I) are useful, e.g. for the prodn. of protecting tubes for probes for the periodic measurement of temp. in steel prodn.. Fire resistant materials can be simply produced and do not required special conditions for storage. (0/0)