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Preparation of Isophorone Diisocyanate Terminated Star Polyethers
Author(s) -
Götz Hans,
Beginn Uwe,
Bartelink Camiel F.,
Grünbauer Henri J. M.,
Möller Martin
Publication year - 2002
Publication title -
macromolecular materials and engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.913
H-Index - 96
eISSN - 1439-2054
pISSN - 1438-7492
DOI - 10.1002/1439-2054(20020401)287:4<223::aid-mame223>3.0.co;2-z
Subject(s) - isophorone diisocyanate , isocyanate , isophorone , polymer chemistry , polyurethane , materials science , catalysis , propylene oxide , ethylene oxide , organic chemistry , chemistry , copolymer , polymer , diamine
Reactive star shaped isocyanate prepolymers have been prepared by endcapping hydroxy functionalized poly(alkylene oxide)s with isophorone diisocyanate. Selective reaction conditions have been worked out to reduce the amount of chain extension and crosslinking due to reaction of both isocyanate groups of the IPDI moieties. By combining 1 H and 13 C NMR spectroscopy with size exclusion chromatography (SEC), the fractions of the monourethane isomers, and the extent of diurethane formation was determined. The effect of catalysis, of the excess of isocyanate, and of the type of poly(alkylene oxide) on the product structure and composition were investigated.