Microcellular polyprene 203-5-2004

Polyprene 203-5-2004 is our two component polyurethane system used for the manufacture of air-filter inserts.
A-Polyprene-203-5-2004 Polyol provides orange foam (RAL 2004).

Typical Component Properties

	Units	A-203-5-2004 Polyol	B-203-5 Isocyanate
Appearance (physical state, colour)		Orange viscous liquid	Dark-brown liquid
NCO content	%	-	30 – 32
Viscosity, 25°C	cps	900	200
Specific Gravity, 25°C	g/cm³	1.02	1.23

Recommended Process Conditions

Polyol needs to be properly mixed before use.

	Units	Values
A-203-5-2004 Polyol	pbw	100
B-203-5 Isocyanate	pbw	28 -33
Components temperature	°C	18 – 22
Typical moulds temperature	°C	30 – 50
Demoulding time	min	3 – 5

Typical Reaction Characteristics

	Units	Hand-mix*
Ratio	Polyol /Iso	100:33
Cream time	s	17 – 25
Rise time	s	45 – 60
Free rise density	kg/m³	300 – 320

*Data referred to laboratory tests made with Isocyanate component at 20°C and Polyol component at 20°C, hand-mixed with mechanical stirrer at 3000 rpm. Reported values vary depending on processing conditions.

Handling and Storage

The Iso component must be stored in liquid state. In case of crystallization it has to be melted heating the drum at 60-70°C for no more than 24 hours.

	Units	A-203-5-2004 Polyol	B-203-5 Isocyanate
Storage temperature	°C	15 - 25	15 - 25
Shelf life	months	6	6

Typical Polymer Properties

These items are provided as general information only.

	Units
Overall density range	kg/m³	300 – 350
Elongation	%	50 – 75
Hardness	Shore A	25 – 35

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