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Desmodur® CQ 70WF64 MB - for flexible moulded foams

DESMODUR CQ 70WF64 MB is a mixture of diphenylmethane-4,4'-diisocyanate (MDI) with isomers and homologues of higher functionality used for the production of flexible polyurethane cold-curing HR molded foam for automotive seating. Our certified DESMODUR CQ 70WF64 MB has a share of approx. 61% bio-based feedstock attributed via the mass balance approach.

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General Characterization

DESMODUR® CQ 70WF64 MB is a mixture of diphenylmethane-4,4'-diisocyanate (MDI) with isomers and homologues of higher functionality used for the production of flexible polyurethane cold-curing HR molded foam for automotive seating. Our certified DESMODUR® CQ 70WF64 MB has a share of approx. 61% bio-based feedstock attributed via the mass balance approach.

Storage Conditions

Recommended storage temperature (°C): 20 - 40
Lengthy storage leads to an increase in viscosity of Desmodur® CQ 70WF64 MB, although in our experience this has no adverse effect on processing. Prolonged exposure to excessively high temperatures may cause insoluble precipitates. Temperatures below 15 °C, on the other hand may lead to crystallization. If drums containing crystallized Desmodur® CQ 70WF64 MB are carefully warmed to a maximum of 70 °C, however, the material will return to the liquid state, although this may lead to an increase in the solids content. Once the product has been reliquefied, the contents of the drums must be homogenized.
Desmodur® containers - including empty ones - should always be kept tightly sealed. It is absolutely essential that water (which reacts with Desmodur® CQ 70WF64 MB to form polyureas and giving off carbon dioxide) is excluded from the containers. During storage, transfer to other containers and processing of Desmodur® CQ 70WF64 MB, therefore, the access of water in any form (damp containers, aqueous solvents, moist air) must be prevented, otherwise carbon dioxide will evolve and produce a dangerous increase in pressure in the tanks and containers. In addition to this, any polyureas forming in Desmodur® 70WF64 will cause turbidity and possibility precipitation of solids, leading to blockages in the filters, pumps and pipelines of the foaming equipment.
Covestro represents that, for a period of 6 months following the day of shipment as stated in the respective delivery documents, the product will meet the values set forth in section "specification" above provided that the product is stored in full compliance with the storage conditions and is otherwise handled appropriately. The lapse of this period does not necessarily mean that the product no longer meets specifications. However, prior to using said product, Covestro recommen ... text to long! (max 2000 characters)

Sampling

Moisture access must be prevented when taking product samples.

Packaging Type

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Technical Properties & Datasheets

Characteristics

Property Name Test Method Unit Value
Density 25 °C DIN 51757 g/cm³ approx. 1.24
Appearance DIN ISO 6271 brownish black liquid

Specifications

Property Name Test Method Unit Value
Acidity MDI-01-03 ppm ≤ 150
Acidity MDI-01-03 ppm ≤ 150
Viscosity 25 °C MDI-01-02 mPa*s 20 - 35
NCO content MDI-01-01 % by wt. 32.0 - 33.0
NCO content MDI-01-01 % by wt. 32.0 - 33.0
Viscosity 25 °C MDI-01-02 mPa*s 20 - 35

Downloads

Technical Data Sheet
Safety Data Sheet
No direct download available, please visit www.productsafetyfirst.covestro.com

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