| 摘要 |
PROBLEM TO BE SOLVED: To provide a pneumatic rubber tire having a built-in non-black colored sealant layer and its manufacturing method. SOLUTION: The pneumatic rubber tire is constituted such that the sealant layer is derived from a sealant precursor layer containing a butyl rubber, organoperoxide, particulate, synthetic amorphous silica and plant-derived organic agricultural seed flour, together with the non-black colored colorant, the butyl rubber-based sealant precursor layer is molded to a tire to form a tire assembly and the butyl rubber component of the sealant precursor layer is depolymerized during a subsequent curing of the tire at an elevated temperature in a suitable mold to form the tire having built-in sealant. The particulate plant derived organic agricultural seed flour is a renewable raw material in a sense that it can be replenished in nature and therefore not as a significant depletion of non-renewable natural resource. The agricultural plant seed flour is comprised of at least a portion of a ground plant seed of an agricultural seed producing plant. The sealant layer can also contain one or more of a liquid polyisoprene and short organic fibers. COPYRIGHT: (C)2005,JPO&NCIPI |
