Compositions – Electrically conductive or emissive compositions – Elemental carbon containing
Reexamination Certificate
2007-12-20
2009-11-10
Kopec, Mark (Department: 1796)
Compositions
Electrically conductive or emissive compositions
Elemental carbon containing
C252S502000, C156S108000, C156S331400, C524S590000, C528S059000, C528S060000
Reexamination Certificate
active
07615167
ABSTRACT:
The invention is a composition comprisinga) one or more isocyanate functional polyether based prepolymers containing one or more organic based polymers dispersed therein;b) one or more isocyanate functional polyester based prepolymers which is solid at 23° C.;c) one or more polyisocyanates having a nominal functionality of about 3 or greater;d) one or more conductive carbon blacks in an amount such that the composition has a dielectric constant of about 15 or less; ande) one or more catalysts for the reaction of isocyanate moieties with hydroxyl groups, wherein the composition demonstrates upon cure a modulus of 2.0 MPa or greater at 25° C. measured according to ASTM D4065; a dielectric constant of about 15 or less; a sag of an uncured sample of less than 2 mm, a press flow viscosity of about 20 to about 50 and a storage modulus of about 5.3×105Pa or greater.
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Dow Global Technologies Inc.
Kopec Mark
Thomas Jaison P
LandOfFree
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