Baytherm® K 4107

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General Characterization

BAYTHERM® K4107 is a polyol formulation to be used together with DESMODUR® 44V20 L in order to produce rigid polyurethane foam by pouring. This system is used for thermal insulation of electrical inhouse water heaters or for similar applications.

BAYTHERM® K4107 contents all necessary additives for the foam productions, including the blowing agent.

BAYTHERM® K4107 contains at least one of the followings HFC´s: HFC-134a, HFC-227ea, HFC-365mfc, HFC-245fa.

Storage Conditions

Polyol can absorb moisture from the air. Keep the container tightly closed in a cool, well-ventilated place. Store at 20°C and keep away from food and other feeding stuff.


The polyol formulation should be homogenised before samples are taken. Moisture access must be prevented.

Packaging Type

Drums (220kg).

Technical Properties & Datasheets

Property Name Test Method Unit Value
Density @ 23ºC LPUR - 050 g/ml approx. 1.072

Property Name Test Method Unit Value
Hydroxyl number LPUR - 049 mg KOH/g 260 ± 10
Water content LPUR - 001 % 3.575 ± 0.125
Viscosity at 25 °C LPUR - 002 mPa*s 500 ± 250


Technical Data Sheet
Safety Data Sheet
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