Covestro Desmodur BL 3575/1 MPA/SN heat-activated HDI curing agent low heat yellowing


Based onHDICapped aliphatic polyisocyanate

Supply form

about 75% Solvent Naphtha100 / 1-Methoxy Propyl acetate-2(178)


withDesmophen® used together with the brand, can prepare light-fast one-component baking polyurethane coating




Measurement units


Non-volatile ingredients (0.2 g/60 min/ 80°C


<ssp; 160°C 20 minutes
Baking temperatures can be significantly reduced using metal catalysts.
For coil coating systems, Desmodur® BL 3575/1 MPA/SN can achieve full crosslinking without catalyst addition at temperatures above 232°C.

– Store in original sealed Covestro container.
– Recommended storage temperature: 0-30°C.
-Protect against moisture, heat and foreign objects.
General Information: Storage at higher temperatures will result in increased color and viscosity. Will result in solidification on storage at significantly lower temperatures. This curing is reversible by simply heating the product without adversely affecting product quality.

Storage time
Covestro declares that the products will conform to the specifications or values ​​set forth in the section “Specifications or Characteristics Data” for a period of nine months after one day for shipment as specified in the shipping documents. The above, applies so long as the product is in full compliance with the storage conditions stated and referenced in the “Storage” section above, and is otherwise properly handled. Failure during the nine-month period does not necessarily mean that the product no longer meets specifications or settings value. However, before using the above products, Covestro recommends testing whether such products still exist to meet specifications or set values. Covestro does not make any representations about a product after the nine-month period has expired. Covestro Xtron is not responsible or liable for meeting specifications or set value after the nine-month period.

Labeling and Legal Requirements
This product data sheet is only used in conjunction with the latest version of the corresponding safety data sheet. Any updated safety-related information, in accordance with statutory requirements, will only be reflected in the Safety Aspects Data Sheet, copies of which will be revised and distributed. Relevant information to current classifications and tags, applications and processing methods can be found in the Security currently in effect. Further data related to security can be found in the datasheet.