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General Characterization

德士模都(Desmodur®)44 V 20 L CN 是一种液态、棕黑色的4,4’-二苯基甲烷二异氰酸酯(MDI)及其异构体和同系物的多官能异氰酸酯的混合物,与多元醇反应,可生成硬质聚氨酯泡沫。

Storage Conditions

推荐储存温度 :10~30°C
储存稳定性 :在密封无湿气的桶内,6个月
德士模都(Desmodur®) 44 V 20 L CN 在低于00C时可能出现局部的结晶,但可以通过短时间对整个桶加热至最高700C使结晶恢复到液态,尽管这可能导致产品中固含量的增加。料桶(包括空桶)应时刻保持密封。本产品严禁与水接触,水会和德士模都(Desmodur®) 44V20L反应生成聚脲和二氧化碳。不仅在储存时,而且从桶中取样及使用过程中都应防止与任何形式的水(潮湿的桶、溶剂中的水、潮湿的空气)接触。否则就可能导致由于二氧化碳的产生而使桶或罐内积聚危险的压力。此外,在(Desmodur®) 44 V 20 L CN 中产生的聚脲会引起固体的析出,从而导致堵塞加工设备的过滤器、泵和管路并导致生产问题。

Sampling

在产品取样时,要防止产品与水分接触或暴露于湿气中。

Packaging Type

桶装、槽罐和槽车。

Technical Properties & Datasheets

Characteristics

Property Name Test Method Unit Value
比热(CP) kJ/(kg*K) 约 1.51
热膨胀系数 K-1 6.59*10-4
苯基异氰酸酯含量 MDI-01-09 ppm ≤ 50
密度(20^0C) DIN 51757 g/ cm³ 约 1.23

Specifications

Property Name Test Method Unit Value
异氰酸根含量 MDI-01-01 重量% 30.5 - 32.5
酸度 MDI-01-03 mg/kg ≤ 200
粘度(25^0C)* MDI-01-02 mPa·s 160 - 240

Downloads

Technical Data Sheet
Safety Data Sheet
No direct download available, please visit www.productsafetyfirst.covestro.com

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