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Desmodur® DN

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材料类型

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材料

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一般特征

Desmodur DN is an aliphatic polyisocyanate of low volatility.
Desmodur DN is a solvent-free liquid polyisocyanate that is emulsifiable in water. Any occasional turbidity or precipitation visible is caused by very small amounts of processing aids These have no adverse effect on the processing and final properties of the cured adhesives. It can be used as the crosslinker for largely pH-neutral aqueous polymer dispersions including polyurethane, polyvinyl acetate, polyacrylate and synthetic rubber dispersions. Crosslinking increases the resistance of the bonds to heat, water, plasticisers and many solvents. Compared with Desmodur DA, Desmodur DN is characterised by its much lower viscosity and is not prone to turbidity at low storage temperatures.

储存条件

Desmodur DN should be stored in tightly sealed original containers and protected from moisture, heat, and foreign materials. The product is sensitive to moisture. Storage at higher temperatures will result in increase of color and viscosity. Storage at significant lower temperatures will result in solidification. This solidification is reversible by briefly heating the product without adversely affecting the quality of the product. Recommended storage temperature is 0º-30ºC.

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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 at 23oCRotation mPa∙s 1,250 ± 300
NCO content % 21.8 ± 0.5
HDI monomer content % ≤ 0.25

属性名称 测试方法 单位 数值
Density at 20°C g/cm3 approx. 1.15
Solid content % 100
Flash point °C approx. 218

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技术数据表
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