|
Chemical Composition |
1,5-naphthalene diisocyanate or naphthalene1,5-diisocyanate |
|
Molecular structure |
|
|
NCOcontent |
40% |
|
Molecular Weight |
210 |
|
Theoretical ratio |
100g Pure polyethylene adipate corresponds to 10.5g NDI (prepolymerprepolymer span>-NCO=0) |
|
Appearance |
Small White or light yellow to off-white irregular flaky crystals |
|
Smell |
Special Isocyanate smell |
|
Purity |
≥99.0% |
|
Freezing point |
126.5-127℃ |
|
Total chlorine content |
≤0.1% |
|
Amount of hydrolyzed chlorine |
≤0.03% |
|
Density |
about 0.40g． cm-3 |
|
Storage |
Attention NDI is very sensitive to moisture. Because all diisocyanates can react with water to form insoluble urea derivatives. NDIshould be stored airtight in a cool and dry condition. After use, it should be sealed immediately to avoid failure. Under suitable external conditions, the product is valid for 6months. |
|
Packaging |
Standard Container: paper drum lined with polyethylene bag, Net Weight20kg/barrel |
Operation Security Measures
INV NDI is pure 1,5-naphthalene diisocyanate (NDI), which is small, white or light yellow to off-white irregular flaky crystals. At room temperature, the vapor pressure is lower than 10-4mbar. The Federal Republic of Germany stipulates that in the working environment, the NDI content should be less than 0.02ppm (0.18mg/m3) (even short-term exceeding the standard is not allowed). Due to the special reactivity, NDI is considered dangerous must be handled with care.
The potential hazard of NDI lies in the dust, vapor and fume formed during use.
Operators may be exposed to NDI in the following situations: ① Dust floating out during weighing or feeding. ②When preparing NDI prepolymer or pouring, steam or smoke generated by excess NDI (smog will be generated when hot NDI steam condenses).
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