material SED-28
SED-28 is a kind of polyether diene with molecular weight of 4000 initiated by propylene glycol. Polyether SED-28 is widely used in the production of sealant and sealing adhesive, as well as adhesive, and also for producing elastomers (such as box wheel, rubber roller, etc.).
Hydroxyl value (mgKOH/g) ：26.5-29.5
Wate %：≤0.08
Acid number (mgKOH/g) ：≤0.05
PH：5-7
Viscosity (mPa·s/25℃)：700-1000
K+,Na+ (mg/kg) ：≤5
Colour APHA：≤50
Appearance：Colorless transparent viscous liquid
SED-28 polyether polyol is a two functionality polyether polyol and molecular weight (MW=4000) with high primary hydroxyl content (POH=85%). It can be used in the preparation of footwear materials to improve the elongation at break, curing speed and release time.
The product is stable at ambient temperature and can be oxidized at high temperature.
Store at ambient temperature, cool and dry. Keep the container closed to prevent moisture from entering. Avoid heat and open fire. Storage period: 12 months
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