Sealant laminates

Details Sealant laminates Sealant laminates

B - Operations, Transporting

60

C

154/105, 154/62,

B60C 17/00 (2006.01) C09D 5/34 (2006.01)

Patent

CA 1100401

ABSTRACT OF THE DISCLOSURE: This disclosure relates to a sealant laminate to be primarily used in pneumatic tires to seal punctures made by external objects, such as nails. The laminate of the invention comprises a puncture sealing layer and at least one other layer, the puncture sealing layer containing a polymeric material that has been at least partially degraded by exposure to irradiation or to heat in the presence of a peroxide to yield its sealant properties; the degraded polymeric material is selected from the group consisting of polyisobutylene, copolymers containing polyisobutylene and polyethylene oxide. The laminate may be in sheet or strip form with various cross-sectional shapes. The layers in the laminate comprise rubber compounds, some of which may contain agents which either assist or retard cure by irradiation so that the layers will have different physical characteristics during the manufacture of end products containing the laminate. The laminate may be cured by any known method, either irradiation or thermal, after its assembly into the final product.

284676

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