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材料类型
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材料
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一般特征
Bayhydur ultra 2858 is a hydrophilic aliphatic polyisocyanate based on hexamethylene diisocyanate (HDI) and isophorone diisocyanate (IPDI).
It is suitable for use as a ready-to-use hardener for waterborne two-component polyurethane systems.
It is suitable for use as a ready-to-use hardener for waterborne two-component polyurethane systems.
储存条件
Bayhydur ultra 2858 should be stored in tightly sealed original containers and protected from moisture, heat, and foreign materials. Hydrophilic isocyanates are very moisture-sensitive and react with water to form carbon dioxide and insoluble ureas. The containers must always be kept tightly closed. The access of water in all forms (moist air, solvents, moist containers) must be prevented, because the generation of carbon dioxide can lead to dangerous increases in pressure. Storage at higher temperatures will result in an increase of color and viscosity. Recommended storage temperature is 0º-30ºC.
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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 |
|---|---|---|---|
| Flash point | °C | approx. 88 | |
| Equivalent weight | approx. 316 | ||
| Density | g/cm^3 | approx. 1.23 |
命名属性规范
| 属性名称 | 测试方法 | 单位 | 数值 |
|---|---|---|---|
| Monomeric HDI | % | < 0.055 | |
| Viscosity at 23^oC | mPa∙s | approx. 500 | |
| NCO content | % | approx. 13.3 | |
| Hazen color value | < 80 | ||
| Monomeric IPDI | % | < 0.045 |
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