Semirigid polyprene 202

Polyprene 202 is a fully water blown semirigid polyurethane system designed for the production of automotive gage panels and other car interior items.

Typical Component Properties

	Units	A-202 Polyol	B-202 Isocyanate
Appearance (physical state, colour)		Grey viscous liquid	Dark-brown liquid
NCO content	%	-	30 – 32
Viscosity, 25°C	cps	1100	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-202 Polyol	pbw	100
B-202 Isocyanate	pbw	50
Components temperature	°C	22 – 26
Typical moulds temperature	°C	40 – 45
Demoulding time	min	3 – 4

Typical Reaction Characteristics

	Units	Hand-mix*
Ratio	Polyol /Iso	100:50
Cream time	s	15 – 20
Gel time	s	55 – 75
Rise time	s	85 – 120
Free rise density	kg/m³	60 – 80

*Data referred to laboratory tests made with Isocyanate component at 25°C and Polyol component at 25°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-202 Polyol	B-202 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	110 - 120
Compressive strength (40%)	kPa	>70
Tensile strength	kPa	>160
Ball rebound	%	>35
Elongation	%	>35
Compression set (50%, 20°C, 72 h)	%	>10

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