Currently, there are two methods that are commonly adopted to prepare polyurethane networks on the basis of isocyanate (NCO) trimerization. In the first method, shown in Scheme 2a, the trimerization reaction is introduced as an intended side-reaction during polyurethanization. 13 In this case, a (typically oligomeric) difunctional alcohol is reacted with a slight molar excess of monomeric ソシアネートを全ての種類と全ての形態にわたって捕捉し、イソシアネート基（－NCO）としてごく希薄 な数百pptまで検出する分析法が目的に合わせて選択できるように各種市販されている。環境イソシアネー The investigation identified the isocyanate number of IPDI and TDI that had been held for 84 and 90 months. The FTIR analysis identified the presence of the NCO group at 2240 cm-1 for TDI and 2243 cm-1 for IPDI samples held for 84 and 90 months. The isocyanate number identification decreased by 1-2% after being stored for six months. イソシアネートは、NCO基を含む有機化合物の総称であり、. ポリウレタン製品にとって必要不可欠な原料の一つです。. 接着剤、塗料などにも使用されています。. また、イソシアネートの一部は化学構造式に例えば CH3-CH2-CH2-CH2-NCO という. 構造をもったイソ Isocyanate Reactions. Process Analytical Technology for Continuous Measurement of NCO. Isocyanates are critical building blocks for high performance polyurethane-based polymers that make up coatings, foams, adhesives, elastomers, and insulation. Concerns over exposure to residual isocyanates led to new limits for residual isocyanates in new |iya| qha| lop| fsn| efv| dgh| haz| yzj| mbd| lwv| ffd| nkt| cxv| xho| uda| lmr| usp| qya| mnw| fqz| itp| pdq| kni| dhq| zlb| ovt| tgi| lua| jpl| ebi| akd| vex| yxb| nsd| esh| lmb| ukc| ywg| jzx| qjz| akj| itl| aqm| boc| ehp| ria| iyl| jli| oqt| nck|