Submit

Mondur® MA 2902

联系专家
i
市场转换
选择会影响你得到的结果。
复制到剪贴板

关于

材料类型

  • MMDI

材料

无可用数据

一般特征

Mondur MA 2902 is an allophanate modified
4,4’-diphenylmethane-diisocyanate (MDI).

储存条件

Mondur MA 2902 diisocyanate must be stored in tightly closed containers and protected from contamination with moisture and foreign materials, which can adversely affect processing. It will react slowly with water to form ureas and carbon dioxide gas, which may cause sealed containers to expand and rupture. Partially filled containers should be blanketed with dry nitrogen.
Storage temperatures should be maintained between 25° to 30°C (77° to 86°F). Under these conditions, Mondur MA 2902 will remain clear for six months. Within this range, a storage temperature above 25°C (77°F) will maximize the storage life of this product.
Mondur MA 2902 diisocyanate must not be allowed to freeze. Exposure to temperatures less than 19°C (66°F), even for short periods of time, can result in the formation of solid material. During the winter months, appropriate precautions must be taken during shipment and storage.
Prolonged storage of solid or partially solid Mondur MA 2902 diisocyanate may result in the ofrmation of MDI dimer in amounts which exceed its solubility in the product at normal storage temepratures. This can make the product unusable.
If solids should form because of exposure to low temperatures, it may be possible to reliquify Mondur MA 2902 by heating. Use a well-ventilated oven for the minimum time necessary to render it clear. The temperature of the product should not exceed 60°C (140°F). Agitation or drum rollers are recommended to avoid excessive local heating, which will degrade the product.
Significant amounts of MDI dimer may form during the heating process. As a result, the remelted diisocyanate may be cloudy, and the processing behavior and/or properties of the final product may be affected.
Mondur allophanate modified diisocyanates may show a noticeable color increase during the shelf-life of the product. This is normal behavior for this material and this changes s ... text to long! (max 2000 characters)

样品

无可用数据

包装类型

无可用数据

技术属性和数据表

属性名称 测试方法 单位 数值
Specific gravity at 25°C 1.20
Flash point PMCC °C 216
Viscosity at 25°C mPa•s 40
Equivalent weight avg. 145
Functionality 2.0
Appearance Light yellow to yellow liquid

下载

技术数据表
安全数据表
无可用直接下载,请访问 www.productsafetyfirst.covestro.com
Download

你想知道更多关于 Mondur® MA 2902?
与我们的专家取得联系!

Contact form image Zoe

我们如何联系您?

* 必填字段

要比较1种产品