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China, Chinese Polyurethane Isocyanate Polymeric Mdi for Spray Foam in Construction in Wall and Roof1 Industrial Products Supplier Manufacturer Details, price list catalog:
China Industrial Products Supplier Manufacturer List Catalog
Organic ChemicalsEster DerivativeSpray MdiPolymeric Mdi
Vida New Material Technology Co., Ltd.
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Product Description Product DescriptionIntroductionDesmodur ? 44V20L is a dark-brown, liquid blend of diphenylmethane-4,4'-diisocyanate (MDI) with isomer and homologues of higher functionality. It is used in conjunction with polyols to produce rigid polyurethanes foam. Sampling Moisture access must be prevented when taking product samplesProduct ParametersSpecification propertyValueUnit of measurementMethodNCO content30.50-32.50% by wt.MDI-01-01Viscosity at 25oC160.0-240.0mPa.sMDI-01-02Acidity(HCL)≤ 200mg/kgMDI-01-03 Other Data PropertyValueUnit of measurementMethodDensity at 20oCapprox. 1.2.3g/cm3DIN51757Phenyl Isocyanate content≤50ppm2011-0489801-95Specific Heat(cp)approx.1.51kJ/kg.K Coefficient of thermal expansion6.59X10-4K-1 *These values provide general information and are not part of the product specificationPackaging & ShippingPackaging Drums,IBCs,tank containers and tank wagonsStorageRecommended storage temperature:+10 to +30oC, storage stability(ex works): 6 months if stored in moisture-tight drumsDesmodur ? 44V20L may undergo partial crystallization at temperatures below 00C.The product can ,however, be brought back into the liquid state by heating the entire contents of the drum for short time to a maximum of 700C, although this may lead to an increase in the solids content.Drums including empty ones-should always be kept tightly sealed. The product should never be allowed to come into contact with water,which reacts with Desmodur ? 44V20L to form polyureas and carbon dioxide. Contact with water in any form (damp drums, solvents containing water, moist air)must be prevented not only during storage, but also when removing material from drum and during processing. Failure to do so may lead to a dangerous build-up of pressure in tanks and drums due to the generation of carbon dioxide. In addition, polyureas forming in Desmodur ? 44V20L can cause solids to separate out, leading to blockages in the filters, pumps and pipelines of the processing equipment and resulting in production problemsCompany Profile
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