Polyurethane or polyurethane-urea tire fillings plasticized with fatty acid esters
OwnerGerhard Mueller, Vincenzo Luciano D'Ignoti +3inventors
InventorsGerhard Mueller, Vincenzo Luciano D'Ignoti, Verena M.T. Thiede, Christoph Juris, Carlo Cocconi
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Abstract
A tire filling material comprises a polyurethane or polyurethane-urea elastomer that is extended with a C1-C4 ester of one or more fatty acids. The fatty acid esters are compatible with the elastomer and with the reactive materials that are used to make the elastomer. The tire filling material is soft and has physical properties that are suitable for tire filling applications.
Claims16
A filled tire comprising a tire casing which is filled with an elastomeric filling material, wherein said elastomeric filling material includes a polyurethane or polyurethane-urea elastomer extended with a C1-C4 alkyl ester of one or more fatty acids, wherein the polyurethane or polyurethane-urea elastomer is formed by curing within the tire casing a reactive composition that includes at least one organic polyisocyanate, at least one high equivalent weight polyol, and at least C1-C4 alkyl ester of one or more fatty acids, and the isocyanate index is from 70 to 130.
(canceled)
A process for making a polyisocyanate-terminated prepolymer, comprising (a) blending an organic polyisocyanate with a C1-C4 alkyl ester of one or more fatty acids, (b) exposing the resulting blend to conditions sufficient to cause the organic isocyanate to react with hydroxyl-containing species in the C1-C4 alkyl ester of one or more fatty acids, and, simultaneously with or after step (b), (c) reacting the organic isocyanate with at least one polyol that has a hydroxyl equivalent weight of at least 300 to form the isocyanate-terminated prepolymer.
Dependencies are inferred from the claim text.