| 英文名称: | | 1,4-butanediamine, 2-methyl-, polymer with alpha-hydro-omega-hydroxypoly(oxy-1, | | 4- butanediyl) and 1,1'-methylenebis(4-isocyanatocyclohexane) | | polyurethane y-225 | | 1,4-butanediamine, 2-methyl-, polymer withalpha-hydro-omega-hydroxypoly(oxy-1,4- butanediyl) and1,1'-methylenebis(4-isocyanatocyclohexane) |
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