Electrically conductive elastomer

Details Electrically conductive elastomer Electrically conductive elastomer

1993-03-25

1993-11-09

Foelak, Morton

Compositions

Electrically conductive or emissive compositions

428 369, 4284231, 4284258, 528 52, 528 56, H01B 100

Patent

active

052599892

ABSTRACT:
An electrically conductive polyurethane elastomer obtained by the reaction of a polytetramethylene ether glycol having the formula HO[(CH.sub.2).sub.4 O].sub.x H where x is from 8 to 41 and from about 20 to about 95 parts by weight per 100 parts by weight of said glycol of at least one diisocyanate, a sufficient amount of chain extender and cross linking agents to provide a crosslinked elastomer and an amount of an asymmetric ionic quarternary ammonium salt having the formula: ##STR1## where R.sub.1, R.sub.2, R.sub.3, R.sub.4 and R.sub.5 are C.sub.n H.sub.2n+1 and 1.ltoreq.n.ltoreq.25 sufficient to provide a D.C. volume resistivity of from about 10.sup.7 to about 10.sup.11 ohm cm. In a preferred embodiment the asymmetric ionic quarternary ammonium salt is hexadecyl ethyl dimethyl ammonium ethyl sulfate.

REFERENCES:
patent: 3959573 (1976-05-01), Eddy et al.
patent: 3959574 (1976-05-01), Seanor et al.
patent: 4058879 (1977-11-01), Lentz et al.
patent: 4062812 (1977-12-01), Safford et al.
patent: 4116894 (1978-09-01), Lentz et al.

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