The reaction kinetics of urethane formation in the presence of metal compounds and tertiary amines

Bakalo, L.A.; Sirotinskaya, A.L.; Lipatova, T.E.; Blagonravova, A.A.; Pronina, I.A.

doi:10.1016/0032-3950(73)90271-2

Cited by 2 publications

(2 citation statements)

References 2 publications

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Section: Introductionmentioning

confidence: 99%

“…Isocyanates react with molecules containing an active hydrogen, such as alcohols, amines, and carboxylic acids. − Reaction of the isocyanate group with these functionalities will give carbamates, ureas, and amides, respectively. These reactions can be catalyzed with tertiary amines (such as triethylamine, TEA) which may coordinate with either the isocyanate or the nucleophile to increase reactivity . In those investigations involving reactions of proteins with diisocyanates, − the proteins were dried prior to reaction with the diisocyanate to reduce the amount of reaction of methylenediphenyl 4,4′-diisocyanate (MDI) with water present in the system.…”

Section: Introductionmentioning

confidence: 99%

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Reaction of Zein with Methylenediphenyl Diisocyanate in the Melt State: Thermal, Mechanical, and Physical Properties

Sessa

Selling

Biswas

2012

Ind. Eng. Chem. Res.

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Corn protein (zein) was melt-processed with methylenediphenyl 4,4′-diisocyanate (MDI) using triethylamine (TEA) as a catalyst to facilitate the reaction of the isocyanate groups with the nucleophilic moieties present on zein. The product of the reaction was examined using sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE) to monitor changes in molecular weight. Techniques used to evaluate property changes after reaction included FTIR, differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), and evaluation of mechanical properties. Our findings demonstrated that zein reacts with MDI in the melt state generating higher molecular weight compounds that after compression molding have improved physical properties and solvent resistance.

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