Bayhydur-waterborne PU curing agent

Covestro Bayhydur 401-70 Hydrophilically modified IPDI polyisocyanate Fast drying, chemical resistance

type	Hydrophilically modified aliphatic polyisocyanates based on isophorone diisocyanate (IPDI)
form of supply	Approx. 70% in 1:1 propylene glycol methyl ether acetate/xylene
use	As a co-reactant for waterborne resins and as a curing agent for the preparation of chemical and weather resistant coatings

Product Specifications

characteristic	Numerical value	Units of measurement	method
NCO content	9.4±0.5	%	DIN EN ISO 11 909
Nonvolatile content	70±2	%	DIN EN ISO 3251
Viscosity@23℃	600±200	mPa•s	DIN EN ISO 3219/A.3
Color value	≤60		DIN EN1557
IPDI monomer content	<0.5	% by weight	DIN EN ISO 10 283

other data*

characteristic	Numerical value	Units of measurement	method
equivalent	about 440
Flash point	Flash point	°C	DIN 55 213/1
Density@20°C	about 1.07	g/cm3	DIN 53 217/3

compatibility
Typically, Bayhydur 401-70 can be intermixed with Desmodur®, Bayhydur and Bayhydrol® grades. However, the entire formulation must be tested for compatibility (including solids content, co-solvent content, co-solvent type). Bayhydur 401-70 can be mixed with Desmodur® N 3300, N 3600, Bayhydur 3100, most Bayhydrol® products such as Bayhydrol A 145, A 242, LS 2058 and LS 2231.

Features/Applications
Bayhydur 401-70 is primarily used as a co-reactant for waterborne polyol binders in Bayhydrol® products. Due to its hydrophilic nature, Bayhydur 401-70 is easily emulsified in the aqueous phase. The addition of Bayhydur 401-70 improves the properties of waterborne two-pack polyurethane coatings such as chemical or solvent resistance.

store
This product is sensitive to moisture and should be stored in the original airtight container at a temperature not exceeding 30 ℃. This product has a shelf life of at least 6 months when stored under proper conditions. However, the viscosity may rise slightly.