Bayhydur-waterborne PU curing agent

Covestro Bayhydur Imprafix® 2794 water-based blocking hardener

Types Water-Based Blocked Aliphatic Polyisocyanates

Supply form about 38% in water

characteristic
Imprafix® 2794 is a curing agent used to increase reactivity and thermal stability. It is supplied in co-solvent free form for textile coating. In combination with Bayhydrol® polyols, Imprafix® 2794 can be used to formulate water thinnable, lightfast one-pack polyurethane stoving varnishes and as an additive in waterborne stoving systems to improve flexibility, impact strength and adhesion.

Feature data*

characteristic	Numerical value	unit	testing method
Viscosity, 23°C (D=40s-1)	< 1500	mPa·s	DIN EN ISO 3219/A.3
Non-volatile component content (1g/1h/105°C)	38 ± 1	%	DIN EN ISO 3251
pH, 20 °C	6.5 - 8.5		DIN ISO 976

*This data is for reference only, and the product specifications that should be followed are subject to the final published information.

Other data*

characteristic	Numerical value	unit	testing method
Blocked NCO Content Blocked	11.5 ± 0.5	%

*This data is general information.

Solubility / dilution
Can be diluted with water, but the compatibility and storage stability of the diluted solution should be tested, especially if a co-solvent is used.

store
- Store in original Covestro airtight containers;
- Recommended storage temperature: 5-23℃;
- Avoid moisture, heat and foreign substances.

storage time
Covestro declares that the product complies with the above "specification or characteristic values" for a period of 6 months from the date of shipment stated on the shipping document, provided that the product is stored in full compliance with the requirements in the "Storage" clause above and handled properly Specifications or characteristic values stated in the Terms (as applicable).
The fact that a product exceeds the above 6-month period does not mean that it no longer meets the specifications or the set values in the characteristic values. However, Covestro recommends that products older than 6 months from the date of shipment be tested before use to confirm that they still meet the specifications or set values in the characteristic values. Covestro makes no commitments for products older than 6 months from the date of shipment, and accepts no responsibility or liability for non-conformance to specifications or set values in characteristic values.

Safety

Product Data Sheets are only valid when used in conjunction with their corresponding up-to-date Safety Data Sheets. Any updates to safety-related information - as required by regulation - will only be reflected in the Safety Data Sheets, copies of which will be revised and distributed accordingly. For relevant information, including the latest classification and labelling, application, handling and further safety-related data, please refer to the currently valid Safety Data Sheet.

This product is an experimental product and has not yet gained extensive experience. Therefore, the manufacturer makes no guarantees regarding the operation or performance of the product in use.