Bayhydur-waterborne PU curing agent

Covestro Bayhydur 3100 Standard 2K Waterborne PU Hardener

type	Hydrophilic aliphatic polyisocyanates based on hexamethylene diisocyanate (HDI)
form of supply	Approx. 70% in 1:1 propylene glycol methyl ether acetate/xylene
use	As a hardener component of high-quality waterborne two-component polyurethane systems and as an additive to improve the performance of waterborne coatings

产品规格

characteristic	Numerical value	Units of measurement	method
NCO content	17.4±0.5	%	DIN EN ISO 11 909
Viscosity, 23°C	2800±800	mPa·s	DIN EN ISO 3219/A.3
Color value (Hazen)	≤ 60		DIN EN 1557
Free HDI monomer	≤ 0.15	%	DIN EN ISO 10 283

Other data*

characteristic	Numerical value	Units of measurement	method
Viscosity@25°C	about 2500	mPa·s	DIN EN ISO 3219/A.3
equivalent	约241	%	DIN EN ISO 3251
density	约1.16	g/ml	DIN EN ISO 2811
Flash point	>250	°C	DIN EN 22 719

*The above values are general information and are not part of product specifications.

Solubility / Dilution
Bayhydur® 3100 can be diluted with esters, ether esters, xylenes and solvent naphtha 100. Compatibility with the above solvents is generally good, but the stability of the prepared solution must still be tested. Polyurethane-grade solvents should be used (water content below 0.05 % and no reactive groups such as hydroxyl or amino groups in the solvent).

Features/Applications .
Because Bayhydur® 3100 is hydrophilic, it is easy to emulsify in aqueous media. The product is mainly used as a crosslinker for water-based hydroxyl-containing polyol binders (Bayhydrol®). Bayhydur® 3100 can also be added to traditional hydroxyl-free dispersions to improve their properties.

store
This product is sensitive to moisture. Store in tightly sealed containers at temperatures not exceeding 30°C. Under proper storage conditions, this product has a shelf life of at least 6 months. Viscosity will increase slightly over time.

Safety: Hazard Identification
Skin contact may cause allergic reactions. This product is harmful to aquatic life and may cause long-term adverse effects in the aquatic environment. This product contains isocyanates. The product safety data sheet should be strictly followed. It includes information on labelling, transportation and storage, as well as information on product use, product safety and ecology.