Unique energy dissipating polyurethane elastomeric composition supporting a physically soft magnetic system

A polyurethane elastomer composition that is the reaction product of:

• a) a urethane forming component comprising a compound containing at least four urethane forming reactive sites and capable of forming stable complexes with component (b) through unreacted urethane forming reactive sites, a diol, and
• (b) a diisocyanate reacted in less than stoiciometric amounts, wherein the polyurethane elastomer composition has a density of, from about 1.2 to about 3.5 gms/cc, a compression set of less than 5%, a recovery time of from about 10 to about 200 milliseconds, and a hardness of less than 70 when measured on the Shore 00 scale, and contains a finely divided metallic substance in which the magnetic moments can be aligned when subjected to a magnetic field either pre, during or post polymerization.

A polyurethane elastomer composition that is the reaction product of:

• (a) a urethane forming component comprising a compound containing at least four urethane forming reactive sites and capable of forming stable complexes with component (b) through unreacted urethane forming reactive sites, an elasticizing polyol selected from the group consisting of diols and triols, and
• (b) a diisocyanate reacted in less than stoiciometric amounts, wherein the polyurethane elastomer composition has a density of from about 1.2 to about 3.5 gms/cc, a compression set of less than 5%, a recovery time of from about 10 to about 200 milliseconds, and a hardness of less than 70 when measured on the Shore 00 scale, and contains a finely divided metallic substance selected from the group consisting of barium, boron, cobalt, copper, iron, neodymium, nickel, promethium, samarium, and strontium, and mixtures of the foregoing.