Curable epoxy based compositions having reduced shrinkage during cure

A curable composition is composed of (a) one or more epoxide group containing materials containing at least two epoxide groups per molecule; (b) a positive amount of an effectively thermoplastic polyester, which does not react into the curable composition and is present as a blended ingredient, whic...

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Bibliographische Detailangaben
Hauptverfasser:	SCHAPPERT, RAYMOND F, PICCIRILLI, ROBERT M
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMISTRY COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-UP
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Beschreibung
Zusammenfassung:	A curable composition is composed of (a) one or more epoxide group containing materials containing at least two epoxide groups per molecule; (b) a positive amount of an effectively thermoplastic polyester, which does not react into the curable composition and is present as a blended ingredient, which does not exceed 40 percent by weight based on the total weight of the epoxide and polyester components of the composition, said polyester having a weight average molecular weight of from about 1,000 to about 8,000, being non-reactive with the one or more epoxide group containing materials and being insoluble in the one or more epoxide group containing materials of (a); and (c) a curing agent adapted to cure the one or more epoxide group containing materials of (a).