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Desmodur® PF

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材料类型

  • MDI

材料

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一般特征

Desmodur® PF is a colourless to yellow coloured, modified diphenylmethane 4,4' diisocyanate.

储存条件

Recommended storage temperature 20 - 25 °C ( in the liquid state )

Shelf life (ex works ) 6 months if stored in sealed, moisture-tight containers

Storage for long periods at temperatures below +15 °C or above +25 °C leads to a deterioration in quality.

At temperatures below 15 °C crystallisation sets in, encouraging the formation of infusible dimers. This makes it impossible to completely melt the product, even if it has been stored for only three weeks.

Storage at temperatures above 25 °C also accelerates the formation of insoluble sediment (dimers). At 40 °C, for example, the storage stability of the product is reduced to 4 months.

Freshly crystallised Desmodur® PF must be remelted immediately by heating to a maximum temperature of 60 to 70 °C. In doing so, it is important to ensure that the entire contents of the drum are melted and homogenised. The drum should then be kept sealed at the standard storage temperature (20 to 25 °C).

样品

Moisture access should be prevented when taking product samples.

包装类型

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技术属性和数据表

属性名称 测试方法 单位 数值
Viscosity 25 °C MDI-01-02 mPa*s 600 ± 100*
Hydrolysable chlorine MDI-01-04 ppm max. 50
NCO content MDI-01-01 % by wt. 23.0 ± 0.5

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技术数据表
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安全数据表
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