Rigid polyprene 9M

Polyprene 9M is a fully water blown system designed for discontinuous applications: f.e. moulded semi-cylindrical panels (so called ‘half-shells’) for pipings insulation.

Typical Component Properties

Units A-9M Polyol B – Polymeric MDI
OH number mg KOH/g 270 -
H2O content % 3.5 -
NCO content % - 30 – 32
Viscosity, 25°C cps 800 200
Specific Gravity, 25°C g/cm3 1.12 1.23

Recommended Process Conditions

Units Values
A-9M Polyol pbw 100
B – Polymeric MDI pbw 130
Components temperature °C 20 – 25
Typical moulds temperature °C 40 – 50
Demoulding time °C 10 – 15

Typical Reaction Characteristics

Units Hand-mix*
Ratio Polyol /Iso 100:130
Cream time s 15
Gel time s 58
Rise time s 79
Free rise density kg/m3 33

*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-9M Polyol B – Polymeric MDI
Storage temperature °C 15 - 25 15 - 25
Shelf life months 6 6

Typical Polymer Properties

These items are provided as general information only.

Units Typical value
Overall density range kg/m3 60 – 80
Closed cell content % ≥90
Compressive strength (10%) MPa ≥0.3
Size stability (24 h aging):
- at +130°C		 % ≤2
Thermal conductivity W/mK ≤0.035
Water absorption (24 h) kg/m2 ≤0.2

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