Expandable polymeric coating compositions
AssigneePolymerics, Inc.
InventorsDavid Lester, Robert R. Alexander
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Abstract
An expandable chemical coating compounded by an admixture of a paint, ink or dye with a polymeric composition embodying an encapsulation of a volatile, gas-producing substance which is heat-expandable in a thin polymeric film, said capsules being dispersed in a polymeric composition such that upon application of heat, the encapsulated volatile substance vaporizes to expand and fracture said capsule, thereby trapping the evolving gas in a polymeric medium so that the medium coating is expanded to produce a three-dimensional effect.
Claims26
An expandable polymeric coating composition for admixture with paints, dyes and inks to form an expandable chemical coating upon the application of heat comprising:
- a first forming binder polymer latex normally in the form of a polymeric dispersion in water to serve as a binder for said composition;
- a dispersing agent to serve as a dispersant for expandable volatile substances encapsulated in a monomeric film forming polymer;
- a plurality of spheres each of which encapsulates at least one expandable volatile substance in a monomeric film forming polymer dispersed within said first film forming binder polymer latex;
- a defoaming agent to prevent excessive foaming when heat is applied to said spheres;
- a bridge solvent to provide compatability with the substance into which said polymeric compositions will be mixed and to provide a wetting of said spheres to provide a homogeneous mixture;
- a thickener to increase the viscosity of the composition to the desired level, to give stability to mixtures and to give suspending action to said spheres.
Dependencies are inferred from the claim text.