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This calculation gives the amount of chain extender required for an isocyanate terminated polymer.

Input:

PREPOLYMER Charge: PREPOLYMER NCO %:
CHAIN EXTENDER OH#: INDEX 100 NCO/OH 1/1:
Output:
CHAIN EXTENDER:
Hydroxyl (amine) number
1,3-Propanediol C3H8O2 1475  
1,4-Butanediol C4H10O2 1245  
1,6-Hexanediol C6H14O2 950  
3,5-Dimethylthio-2,4-toluenediamine C9H14N2S2 523  
Resorcinol bis(2-hydroxyethyl) ether C10H14O4 566  
3,5-Diethyl-2,6-diaminotoluene C11H18N2 630  
3,5-Diethyl-2,4-diaminotoluene C11H18N2 630  
4,4'-Methylenebis(2-chloraniline) C13H12Cl2N2 420  
N,N'-di-sec-butyl-p-phenylenediamine C14H24N2 509  
Bis(N-sec-butyl-p-aminophenyl)methane C21H30N2 361  
       
       

Last edited on:

November 14, 2006

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