Stable dispersions of polymers in polyepoxides
AssigneeThe Dow Chemical Company
InventorsDwight K. Hoffman, Charles B. Arends
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Abstract
Dispersions of polymers and optional dispersion stabilizers in a polyepoxide resin continuous phase is characterized in that the dispersion remains stable above 60.degree. C. The compositions are curable and are useful as coatings, in preparing laminates and reinforced plastics, and as adhesives. The compositions exhibit properties which are superior to compositions containing reactive liquid polymers.
Claims8
A process for preparing a stable polymer-in-polyepoxide dispersion wherein a small amount of an unsaturated compound having an oxirane-reactive functionality is reacted with an excess of a polyepoxide at a temperature above the softening point of the polyepoxide to form a blend of polyepoxide and a dispersion stabilizer-precursor having free oxirane groups, adding ethylenically unsaturated monomer thereto which is then polymerized at a temperature above the softening point of the polyepoxide without curing said oxirane groups to form a stable polymer-in-polyepoxide dispersion.
Dependencies are inferred from the claim text.