| 摘要 |
PROBLEM TO BE SOLVED: To provide a polyurethane resin formative composition for shielding a neutron beam having low viscosity, excellent in workability, and imparting high neutron shieldability to a molding.SOLUTION: A polyurethane resin formative composition for shielding a neutron beam contains polyol and polyisocyanate, and has a hydrogen atomic concentration of 5.0×10/cm-7.5×10/cm; a polyurethane resin molding for shielding a neutron beam is obtained by reactively curing and molding the composition; and a neutron beam shielding material is obtained by processing the molding. The polyisocyanate is preferably an aliphatic and/or alicyclic polyisocyanate. |
