N,N'-dialkylphenylenediamines as curing agents in polyurethane and polyurea manufacture by reaction injection molding
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United States of America Patent
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Aug 14, 1990
Issued Date -
N/A
app pub date -
Oct 31, 1988
filing date -
Dec 9, 1987
priority date (Note) -
Expired
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Abstract
N,N'-dialkyl- and diarylphenylenediamines are effective curing agents in combination with other polyamines and polyols in reaction injection molding for a diverse class of polyisocyanates. The diamines provide a broad spectrum of cure times, as well as giving elastomers an interesting and useful diversity of properties. Such polyamines may be used as a constituent in a blend of polyamines as the isocyanate-reactive component, in which case the elastomer may be viewed as predominantly a polyurea, or as a constituent in a blend with polyols, in which case the elastomer may be viewed as an elastomer with both urethane and urea segments.
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