Bayhydrol A-Aqueous Acrylate Dispersion

Covestro Bayhydrol A 2651 waterborne acrylate dispersion fast drying and high transparency

type	Aqueous hydroxyl-containing polyacrylate secondary dispersion
form of supply	About 41% dissolved in water/Dowanol® PnB neutralized with dimethylethanolamine, 3.4% Dowanol® PnB
use	Mixing with waterborne polyisocyanates to prepare waterborne two-component polyurethane coatings

产品规格

characteristic	Numerical value	Units of measurement	method
Non-volatile content (1g/1h/125℃/convection oven)	38.5-41.5	%	DIN EN ISO 3251
Viscosity, 23℃(D=about 100s-1)	≤200	mPa.s	DIN EN ISO 3219/A.3
pH (1:3 dilution in deionized water)	8-9		DIN ISO 976
Acid value	8-11.2	mgKOH/g	DIN EN ISO 2114

Other data*

characteristic	Numerical value	Units of measurement	method
Hydroxyl content (solvent-free determination)	about 3	%	DIN EN ISO 2811/3

*This data is general information and is not part of the product specification.

Features/Applications

Mixed with aliphatic polyisocyanates, Bayhydrol® A2651 is ideal for the preparation of glossy and matt two-component polyurethane coatings as well as pigmented coatings. This product has been specially developed for two-component wood coating systems and is characterized by good film clarity and high wood color warmth. Combined with Bayhydur® XP 2487/1 or XP 2655, it provides coatings with excellent chemical resistance. Co-reactants suitable for the preparation of waterborne two-pack coatings include: Bayhydur® XP 2655, XP 2487/1, 3100, 304 or 305; this product has good compatibility. Can be mixed with other water-dilutable adhesives. But the compatibility test must be carried out one by one.

store
- Store in original Covestro airtight containers.
- Recommended storage temperature: >0-30℃
- Avoid freezing, heat and foreign substances.
General Information: Cooling to -18°C for a short time will normally not damage the product. Prolonged freezing can severely damage the product. Long-term storage at higher temperatures can result in a decrease in viscosity and/or an increase in average particle size, possibly resulting in precipitation or coagulation. Can render the product unusable due to contamination with certain bacteria, molds or algae.

storage time
Covestro declares that, provided that the product is stored in full compliance with the requirements in the "Storage" clause above and handled properly, the product complies with the above "specification or characteristic value" for a period of 6 months from the date of shipment stated on the shipping document Specifications or characteristic values stated in the Terms (as applicable). Exceeding the above 6-month period does not mean that a product no longer meets the specifications or the values set in the characteristic values. However, Covestro recommends that products older than 6 months from the date of shipment be tested prior to 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 of specifications or set values in characteristic values.

Safety
This product data sheet applies only to the latest version of the corresponding safety document. Any updates to safety-related information consistent with legal requirements will only be reflected in the Safety Data Sheet, which will be updated and published. Information related to current classification and labelling, application and process methods, and more safety-related data can be found in the latest available safety data sheets.