Antistatic or electrically conductive thermoplastic polyurethane

Details Antistatic or electrically conductive thermoplastic polyurethane Antistatic or electrically conductive thermoplastic polyurethane

1984-06-14

1985-07-02

Jacobs, Lewis T.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

524495, 524589, 524590, 524910, 252511, C08K 304

Patent

active

045269521

ABSTRACT:
Antistatic and/or electrically conductive thermoplastic polyurethanes contain carbon black whose surface area determined by the BET method is from 600 to 1200 m.sup.2 /g, have a dibutylphthalate absorption number of 300 to 450 cm.sup.3 /100 g, a pour density of less than 250 kg/m.sup.3, and an average particle size less than 50 nm.
Incorporation of the carbon black into the thermoplastic polyurethane produced by the continuous sheet method takes place at temperatures under the primary melt peak for the crystalline rigid segments, measured by means of differential calorimetry, preferably in an extruder.
The products are suitable for preparing films for flat heating elements, antistatic hoses, cables, and profiles.

REFERENCES:
patent: 3673121 (1972-06-01), Meyer
patent: 3830656 (1974-08-01), Takenaka et al.
patent: 4097656 (1978-06-01), Dany et al.

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