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Brand Product

Covestro Bayhydur 305 water-based HDI polyisocyanate easy to mix high gloss

                                                                      

Type

Hydrophilic aliphatic polyisocyanate based on hexamethylene diisocyanate

Supply form

None Solvent type

Purpose

Curing agent for water-based two-component polyurethane coatings

Product Specifications

Features

Value

Measurement units

Method

NCOContent

16.2 ±0.4

%

DIN EN ISO 11 909

Viscosity@ 23

6,500 ±1,500

mPa ·s

DIN EN ISO 3219

HazenColor value

150

DIN EN 1557

Isocyanates Monomer content

< 0.15

% (by weight)

DIN 55 956

Other data*

Features

Value

Measurement units

Method

Density

About1.16

g/cm3

DIN 53 217

Flashpoint

about230

DIN EN 53 213

Solubility/Dilution
Bayhydur 305 generally has good compatibility with organic solvents such as esters, ether esters, xylene and solvent naphtha 100. However, in any case, the solubility/miscibility of the prepared solution must be tested. Polyurethane grade solvents (moisture content <0.05%) should be used

Features/Applications
This product is a cross-linking agent for water-based coatings. It is particularly suitable for use in civil fields where it can be mixed and used immediately after vibration or manual stirring.
Even under pre-diluted conditions, the coating is still transparent and bright. The mixing ratio of grinding base to curing agent is usually 10:1.

enter”>g/cm3

DIN 53 217

Flashpoint

about230

DIN EN 53 213

Solubility/Dilution
Bayhydur 305 generally has good compatibility with organic solvents such as esters, ether esters, xylene and solvent naphtha 100. However, in any case, the solubility/miscibility of the prepared solution must be tested. Polyurethane grade solvents (moisture content <0.05%) should be used

Features/Applications
This product is a cross-linking agent for water-based coatings. It is particularly suitable for use in civil fields where it can be mixed and used immediately after vibration or manual stirring.
Even under pre-diluted conditions, the coating is still transparent and bright. The mixing ratio of grinding base to curing agent is usually 10:1.

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