Ciba-geigy Corporation

Ciba Specialty Chemicals Corporation

Robert Peter Peyer

Sameer H Eldin

Frans Setiabudi

Jurg Maurer

Urs Gruber

Peter Grieshaber

Francedillaois Rime

Curable suspensions of an epoxy resin formulation comprising

Core/shell polymer toughener suspended in epoxy resin

Epoxy resin with anhydride, toughener and active hydrogen-containing

A storage-stable suspension of an epoxy resin hardener and a toughener useful as a molding composition is prepared via a) the addition of an organic solvent to an aqueous emulsion of the toughener when using a water-sensitive hardener, such as a polycarboxylic anhydride, removing the water as an azeotrope by vacuum distillation, then adding the epoxy resin hardener and removing the residual solvent by vacuum distillation, or b) the addition of an aqueous emulsion of the toughener with or without an organic solvent to the epoxy resin hardener when using a water-insensitive hardener such as a polyamine, and removing the water and any organic solvent by vacuum distillation.

Preparing suspension of epoxy resin hardener and toughener

Storage-stable suspension comprised of a solid or liquid epoxy resin hardener and a solid or liquid toughener suspended therein is distinguished by excellent homogeneous dispersion of the toughener in the epoxy resin hardener and are suitable for preparing suspensions of curable epoxy resin compositions.

Storage-stable suspension of tougheners in epoxy resin hardeners

Curable composition based on cycloaliphatic epoxy resins

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Lausen, Switzerland

Robert Peter Peyer