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Isocyanate blocking agents use in polyurethane processing
Author(s) -
Camberlin Y.,
Michaud P.,
Pesando C.,
Pascault J. P.
Publication year - 1989
Publication title -
makromolekulare chemie. macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 0258-0322
DOI - 10.1002/masy.19890250110
Subject(s) - caprolactam , polyurethane , isocyanate , blocking (statistics) , curing (chemistry) , materials science , beckmann rearrangement , chemical engineering , polymer , polymer chemistry , oxime , chemistry , composite material , organic chemistry , computer science , computer network , engineering
Abstract Difunctional isocyanates blocked with ϵ‐caprolactam and oximes are tested as curing agents in poly‐(urethane‐ureas) prepregs formulations. With ϵ‐caprolactam blocking agent the temperature of dissociation is around 20–40°C higher than with 2‐butanone oxime. Polymerizable blocking agents are proposed for the development of thick pieces. Simultaneous interpenetrating polymer networks are prepared and their morphology and physical properties are investigated using different technics.