Rigid polyprene 317

Polyprene 317 is HCFC-141b blown PU system for continuous lamination applications, furnished as three liquid components: polyol blend, catalyst blend and isocyanate.

Typical Component Properties

Units A-317 Polyol C-317 Cat B-317 Iso
OH number mg KOH/g 323 391 -
H2O content % 1.7 0.4 -
NCO content % - - 30 – 32
Amine nitrogen content % - 3.6 -
Viscosity, 25°C cps 825 100 200
Specific Gravity, 25°C g/cm3 1.15 0.98 1.23

Recommended Process Conditions

Units Values
A-317 Polyol pbw 100
C-317 Catalyst pbw 4
B-317 Iso pbw 131
Components temperature °C 20 – 24
Metal plates temperature:
- upper plate;		 °C 25 – 28
- lower plate °C 36 – 40
The temperature inside two-plate conveyor °C 38 – 40

Typical Reaction Characteristics

Units Hand-mix*
Ratio Polyol (+4% Cat)/Iso 100:126
Cream time s 18
Gel time s 73
Rise time s 100
Free rise density kg/m3 45

*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-317 Polyol C-317 Catalyst B-317 Iso
Storage temperature °C 15 - 25 15 - 25 15 - 25
Shelf life months 6 6 6

Typical Polymer Properties

These items are provided as general information only.

Units Typical value
Core density kg/m3 46
Closed cell content % 96
Compressive strength (10%) MPa 0.25
Size stability (24 h aging):
- at +8°C		 % 0.5
Thermal conductivity W/mK 0.021
Water absorption (24 h) kg/m2 0.089

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