Polyurethane-61

OriginPolyurethane-61 is synthesized from polyols and isocyanates, which are petroleum-derived or bio-based chemical precursors. The polymer is produced through step-growth polymerization, where polyols and isocyanates react to form long-chain urethane linkages.

Polyurethane-61 is the complex polymer made by first reacting saturated methylene diphenyldiisocyanate (SMDI), dimethyl aminopropylamine (DMAPA), isopropylidenediphenoxypropanol and the polyester polyol derived from isophthalic acid/1,6-hexanediol/adipic acid to form a prepolymer, followed by dispersion in water with triethylamine and subsequent chain extension with ethylenediamine.

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