Thermosetting polyurethane compositions
AssigneeThe B. F. Goodrich Company
InventorsCharles S. Schollenberger, Kornelius Dinbergs
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Abstract
Improved thermoset or vulcanized polyurethane elastomers are obtained by adding to liquid polyurethane reactants, prior to reaction to form the polyurethane, organic peroxides having a half-life value of greater than one hour at 100.degree. C. Such mixtures may be heated to form the polyurethane article and thereafter thermoset or vulcanized, or the polyurethane containing the unactivated peroxide may be provided in sheet, crumbs, granules or otherwise and then formed and heated to thermoset or vulcanize the polyurethane.
Claims15
A process for preparing cross-linkable peroxide containing polyurethanes comprising mixing together in a liquid state a hydroxyl or amine terminated compound having a molecular weight greater than 300 with an organic diisocyanate and an organic peroxide having a minimum half-life value of about 1 hour at 100.degree. C. and heating the mixture to form a polyurethane elastomer.
Dependencies are inferred from the claim text.