| 摘要 |
PROBLEM TO BE SOLVED: To provide a polyurethane-based cement composition exhibiting low gloss regardless of the hardening condition. SOLUTION: The polyurethane-based composition contains, as essential components, hydraulic cement, water, a polyol and an isocyanate compound, wherein the isocyanate compound contains≥5% 2, 4'-diphenylmethylene di-isocyanate and any of hardened materials hardened at 25°C and hardened at 5°C shows a 60 degree specular gloss of <5.0. COPYRIGHT: (C)2009,JPO&INPIT
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