Method of preparing toughened epoxy polymers

PCT No. PCT/GB88/00477 Sec. 371 Date Jan. 4, 1990 Sec. 102(e) Date Jan. 4, 1990 PCT Filed Jun. 22, 1988 PCT Pub. No. WO88/10276 PCT Pub. Date Dec. 29, 1988.Toughened epoxy resins are prepared by curing a mixture of epoxy resin, a liquid carboxyl-terminated elastomer, and, as curing agent, a non-arom...

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Hauptverfasser:	TOD, DAVID A, SHAW, STEVEN J
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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Zusammenfassung:	PCT No. PCT/GB88/00477 Sec. 371 Date Jan. 4, 1990 Sec. 102(e) Date Jan. 4, 1990 PCT Filed Jun. 22, 1988 PCT Pub. No. WO88/10276 PCT Pub. Date Dec. 29, 1988.Toughened epoxy resins are prepared by curing a mixture of epoxy resin, a liquid carboxyl-terminated elastomer, and, as curing agent, a non-aromatic heterocyclic amine or a salt thereof. Cure is in two stages, the first stage at a temperature of at least 135 DEG C. for less than two hours to provide a partly cured formulation comprising phase-separated rubbery particles in an epoxy resin matrix, and a second stage of completing the cure.