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Desmodur® ultra DA-L

Hydrophilic aliphatic polyisocyanate based on hexamethylene diisocyanate. Desmodur® ultra DA-L is a liquid polyisocyanate, emulsifiable in aqueous polymer dispersions

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材料

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一般特征

Desmodur ultra DA-L is a hydrophilic aliphatic polyisocyanate based on hexamethylene diisocyanate (HDI).
Desmodur ultra DA-L is a solvent-free liquid polyisocyanate, emulsifiable in aqueous polymer dispersions. 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 a crosslinking agent for largely pH-neutral aqueous polymer dispersions, such as polyurethane, polyvinylacetate, polyacrylate and synthetic rubber dispersions. Crosslinking raises the resistance of the bonds to heat, water, plasticizers and numerous solvents.

储存条件

Desmodur ultra DA-L 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 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
Density at 20°C g/ml approx. 1.16
Flash point °C 215

命名属性规范

属性名称 测试方法 单位 数值
Monomeric HDI % ≤ 0.10
NCO content % 19.0 - 21.0
Viscosity at 23^oC mPa∙s 2,400 - 3,600

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技术数据表
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