Rigid polyprene 17Hsp

Polyprene 17Hsp is a spray PU system for roofing and wall applications. It is blown by a new generation auxiliary blowing agent spumagen (ODP=0, GWP=0), which is delivered separately.
Polyprene 17Hsp enables delivering good leveling, fast thickening and fast expansion.

Typical Component Properties

Units A-17Hsp Polyol Spumagen B – Polymeric MDI
OH number mg KOH/g 340 - -
H2O content % 2.0 - -
NCO content % - - 30 – 32
Amine nitrogen content % - 6.0 -
Viscosity, 25°C cps 985 - 200
Specific Gravity, 25°C g/cm3 1.16 0.97 1.23

Recommended Process Conditions

Spumagen used as a blowing agent must be premixed in polyol component before processing in amount of 11% by weight. This mixture must be worked out during one shift.

Units Values
A-17Hsp Polyol pbw 100
B – Polymeric MDI pbw 110
Polyol temperature °C 19 – 21
Iso temperature °C 20 – 24
The temperature of the insulated surface °C 10 – 70

Typical Reaction Characteristics

Units Hand-mix*
Ratio Polyol /Iso 100:110
Cream time s 3 – 5
Rise time s 12 – 16
Free rise density kg/m3 30 – 35

*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-17Hsp Polyol Spumagen B – Polymeric MDI
Storage temperature °C 15 - 25 <20 15 - 25
Shelf life months 6 6 6

Typical Polymer Properties

These items are provided as general information only.

Units Typical value
Overall density range kg/m3 30 – 60
Closed cell content % ?90
Compressive strength (10%) MPa ?0.2
Size stability (24 h aging):
- at +130°C		 % ?5
Thermal conductivity W/mK ?0.027
Water absorption (24 h) kg/m2 ?0.2

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