< Topic > It is superior in the oxygen absorptivity in room temperature, contents of the metal are few, containing the oxygen absorbent layer which contains the oxygen absorbent and this oxygen absorbent where the odor at the time of oxygen uptake is little, it offers the oxygen absorptive multilayer body which becomes.Solutions The conjugate diene polymerization annulus chemical material (A) and the conjugate diene polymerization annulus chemical material (A) unsaturated bond decrease ratio (%) a 5 points or more smaller unsaturated bond decrease ratio (%) the conjugate diene polymerization annulus chemical material which it possesses (B) and, containing, the oxygen absorbent which becomes. The conjugate diene polymerization annulus chemical material it is desirable (A) for unsaturated bond decrease ratio to be 60% or more, the conjugate diene polymerization annulus chemical material it is desirable (B) for unsaturated bond decrease ratio to be under 60%. gasubaria material layer, containing the above-mentioned oxygen absorbent, oxygen absorbent layer and the sealing up material layer which become, being laminated by this order, the oxygen absorptive multilayer body which becomes.< Selective figure > It is not【課題】 室温における酸素吸収性に優れ、金属の含有量が少なく、酸素吸収時の臭気が少ない酸素吸収剤及びこの酸素吸収剤を含有する酸素吸収剤層を含有してなる酸素吸収性多層体を提供する。【解決手段】 共役ジエン重合体環化物(A)と、共役ジエン重合体環化物(A)の不飽和結合減少率(%)よりも5ポイント以上小さい不飽和結合減少率(%)を有する共役ジエン重合体環化物(B)と、を含有してなる酸素吸収剤。共役ジエン重合体環化物(A)の不飽和結合減少率が60%以上であることが好ましく、共役ジエン重合体環化物(B)の不飽和結合減少率が60%未満であることが好ましい。ガスバリアー材層、上記酸素吸収剤を含有してなる酸素吸収剤層及び密封材層が、この順に積層されてなる酸素吸収性多層体。【選択図】 なし
