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  • 粘合剂

Desmodur® 44 M Liquid

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关于

材料类型

  • MDI
  • MMDI
  • 芳族聚异氰酸酯
  • 异氰酸酯
  • 反应型体系

材料

粘合剂
无溶剂

一般特征

Desmodur® 44 M Liquid is a monomeric diphenylmethane-4,4'-diisocyanate (MDI).
Desmodur® 44 M Liquid is a monomeric diisocyanate that is solid at room temperature and liquid above around 40 °C. It is suitable for combination with Baycoll®, Desmophen® and Acclaim® in the formulation of adhesives and polyurethane coating resins.

储存条件

- Storage in original sealed Covestro container.

- Recommended storage temperature: 41 - 45 °C.

- Protect from moisture, heat and foreign material.

General information: The product is sensitive to moisture. Like all isocyanates, it reacts with water to form insoluble urea derivatives and carbon dioxide. In closed containers, the formation of carbon dioxide can results in a dangerous build-up of pressure. Contact with air, especially coupled with exposure to light, accelerates the yellowing of the product. Liquid product should therefore be padded with dry nitrogen. Generally speaking, the processing properties are not affected by yellowing. As a result of dimerization (formation of uretdione), the product is sensitive to heat. The solid product dimerizes more quickly at room temperature than the liquid product stored at 42 °C. Therefore, solid product should be stored at temperatures below 5 °C and melted quickly and carefully. Although dimerization declines with decreasing temperature, the storage stability is also limited at 5 °C. Handling instructions, safety data, information about the transport of bulk liquids and customer tank farms and proposals for melting units can be supplied on request.

样品

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包装类型

无可用数据

技术属性和数据表

命名属性特征

属性名称 测试方法 单位 数值
Density at 40 °C DIN 51 757 g/cm3 approx. 1.19
Viscosity at 40 °C (2011-0313703-95) mPa*s 4.1
Vapor pressure at 20 °C hPa < 10^-5
NCO content (theoretical) % by wt. 33.6
Freezing point (2011-0260102-92) °C min. 38.4
Phenyl isocyanate content (2011-0489801-95) ppm max. 10

命名属性规范

属性名称 测试方法 单位 数值
Hydrolysable chlorine MDI-01-04 mg/kg max. 50
Dimer *Valid only for the time of delivery MDI-01-08 % max. 0.1
4,4'-MDI MDI-01-06 % min. 98.2
2,4'-MDI MDI-01-06 % max. 1.8

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

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