non-hydrolytic foam stabilizer of polysiloxane polyether copolymer, with a silicon-carbon bond. 
It is a new modified product which is mainly used in rigid foam of PU plastic.
 
Typical data: 
  • Appearance: Light yellow to amber transparent liquid
  • Content of active material: 100%
  • Viscosity(25C): 600-1200 cp
 
Features: 
  • good solubility and stability in the premixed systems containing isocyanate, polyether polyol, 
    blowing agent of fluorocarbon, water, catalyst of amine and organic tin, and fire retardant.
  • significantly reduce or even eliminate the ‘shear line’ phenomenon of plastic products, 
    which helps to improve the insulation effect of refrigerators and freezers, and enhance the bonding strength 
    of the foam and the refrigerator shell.
  • particularly suitable for the foam formulation of low fluoride, can reduce the amount of CFC-11 
    more than 50%.
  • Because of the above advantages, Silibase-2891 is particular suitable for the production of premixed polyether used 
    in insulation materials of refrigerators and freezer, laminations, insulation pipes and spray.
 
How to use: 
Use levels of 2 to 3 parts Silibase-2891 per 100 parts polyols are s ested. 
The optimum dosage is determined by the particular foam formulation.
 
Packaging and Storage: 
  • Available in 25 liter pail and 200 liter drums.
  • 24 months in closed containers.