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Moisture‐cured polyurethane based on polyester and polycarbonate polyols
Author(s) -
Mukherjea R. N.,
Saha K. K.
Publication year - 1980
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1980.070251203
Subject(s) - polyol , diethylene glycol , ethylene glycol , polyurethane , sebacic acid , polyester , diol , materials science , polymer chemistry , triethanolamine , polyvinyl alcohol , curing (chemistry) , isocyanate , polycarbonate , organic chemistry , chemistry , composite material , analytical chemistry (journal)
Moisture‐cured polyurethanes were prepared by reacting toluene diisocyanate and sebacic acid‐based hydroxy esters such as ethylene glycol sebacate, propylene glycol sebacate, diethylene glycol sebacate, and polyester polyols such as poly(ethylene glycol sebacate), poly(propylene glycol sebacate), poly(diethylene glycol sebacate), and poly(butane diol sebacate). The effect of molecular weight of the esters on film properties and the catalytic effect of 3–5% triethylamine, triethanolamine, and 2‐diethylaminoethanol on curing of such films were investigated. Polyurethanes were also prepared using a blend of poly(butane diol carbonate) polyol with polyester polyols. Best polyurethane compositions were obtained when sebacic acid‐based polyester polyols were blended with poly(butane diol carbonate) polyol in the ratio of 3:2. These polyurethanes show good tensile strength (120–215 kg/cm 2 ) and elongation (340–460%) properties, having high melting points (247–268°C) and good resistance to solvents and chemicals. Moreover, they are colorless and transparent.