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Studies on curing urethane prepolymers with aniline–formaldehyde resins
Author(s) -
Kozakiewicz Janusz,
Orzechowski Andrzej,
Raszczuk Alina,
Jamróz Michai H.,
Dobrowolski Jan Cz.
Publication year - 1992
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.1992.070440805
Subject(s) - aniline , formaldehyde , curing (chemistry) , prepolymer , toluene , polymer chemistry , synthetic resin , polyurethane , solvent , materials science , chemistry , organic chemistry
Commercial aniline–cresol–formaldehyde resin, two model aniline–formaldehyde and aniline–cresol–formaldehyde resins, and methylenedianiline have been used as curatives for NCO‐terminated urethane prepolymer prepared from polyoxypropylenediol and toluene‐diisocyanate. Based on viscoelastic behavior of the investigated systems and changes in their IR spectra, it has been concluded that phenolic OH groups present in aniline–cresol–formaldehyde resin do not play an important role in the curing process carried out at RT despite earlier suggestions to the contrary. The explanation for specific behavior of systems where urethane prepolymers have been cured with commercial aniline–cresol–formaldehyde resin is presumably the presence of small amount of solvent (benzyl alcohol) in that resin, which may influence the reaction kinetics.