Acrylic-modified epoxy resin adhesive compositions with improved rheological control
AssigneeThe Dow Chemical Company
InventorsYasemin Ersun-Hallsby, Dwight K. Hoffman, Gerald C. Kolb, Gene D. Rose
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Abstract
A thixoropic adhesive composition exhibiing good sag resistance is prepared comprising a mixture of a polymer-modified epoxy resin and a rheological control agent. The polymer-modified epoxy resin is preferably a dispersion of acrylic elastomer in an epoxy resin in which the acrylic elastomer particles have added hydroxyl functionality which interacts favorably with rheological control agents, such as fumed silica. Acrylic epoxy resin dispersions containing added hydroxyl functionality give improved rheological control.
Claims12
A thixotropic adhesive composition exhibiting good sag resistance comprising a mixture of:
- a. a dispersion which comprises an uncured epoxy resin as a continuous phase having dispersed therein an in situ polymerized insoluble acrylic elastomer which has a plurality of hydroxyl functionality;
- and
- b. an effective amount of a rheological control agent which has a plurality of pendent hydroxyl groups.
Dependencies are inferred from the claim text.