Dielectrically modified polyurethane foam material

Details Dielectrically modified polyurethane foam material Dielectrically modified polyurethane foam material

C - Chemistry, Metallurgy

08

J

403/14

C08J 9/00 (2006.01) C08G 18/14 (1980.01)

Patent

CA 1042599

DIELECTRICALLY MODIFIED POLYURETHANE FOAM MATERIAL Inventor: Morey Weisman, a citizen of the United States of America and resident of Jamaica, New York ABSTRACT OF THE DISCLOSURE A modified, flexible polyurethane foam product which incorporates a three-dimensional skeletal network of a thermoplastic additive whose dielectric loss index is greater than the loss index of polyurethane foam to impart to the product an acceptable dielectric heating response in a high-frequency electric field. The additive in par- ticulate form is introduced into the polyurethane foam- forming reaction mixture, the additive having a gell point which is lower than the temperature level of the exothermic reaction which takes place when the mixture is caused to foam and expand. The additive is further characterized by a low order of viscosity whereby when rendered molten by the exothermic reaction, the particles are extruded by the expanding urethane mass to create tentacles that interlace the cellular urethane structure to form the skeletal network. -1-

191640

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