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Novel isochroman-3-ones for the curing of unsaturated polyesters via Diels-Alder reaction

✍ Scribed by Fred Hollwedel; Gerhard Koßmehl

Publisher
John Wiley and Sons
Year
1999
Tongue
English
Weight
169 KB
Volume
200
Category
Article
ISSN
1022-1352

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✦ Synopsis

The synthesis of some new 4-hydroxy, 4-butyloxy, 4-propionyloxy, and 4-acryloyloxy substituted isochroman-3-ones is described. The influence of the substitution pattern in position 1 and 4 on the CO 2 elimination, which leads to high reactive ortho-quinodimethanes, is investigated. The saturated compounds are used for model reactions with diethyl maleate to study the Diels-Alder reaction and to explain the curing mechanism of unsaturated polyesters. The acrylic ester is copolymerized with styrene to give a reactive copolymer which can easily cure unsaturated polyesters at 170 8C in two mins without toxic byproducts.

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