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PU Synthetic Resins

 

 

Polyurethane (PU) is a general term for polymers forming by the reaction of poly isocyanate and polyols.
  Polyether polyols are formed by the reaction of propylene oxide(PO) and ethylene oxide (EO) .
  Polyester polyols could be obtained by condensation of dicarboxylic acid (AA, TPA, IPA) and dibasic alcohol(EG, 1,4-BG).
  Polyisocyanate (MDI) is prepared mass product by phosgenating formaldehyde and aniline.
  Polyols, Ethylene glycol (EG), Glycerin, Butanediol, 1,6-Hexanediol and trimethoxypropane(TMP) are the common chain extender or crosslinkers in PU synthesis.

Depense on the choice and the application of monomers, when choosing monomers as PU formulation, one should manipulate the functional group activities of each monomer, in order to consider the reaction condition and the usage of catalyst. The chain length, properties of function groups on chains, and the symetry properties of molecular structures would determine the morphology and properties of formed PU polymer.

 

Thermoplastics, abrasion-proof elastomer and coating, foams, high functional fibers.