Patent ID: 9422458
Filing Date: 2016-08-23
CPC Classification: B05D,B29C,B32B,C08G,C09J

Claim Text:
1. A method for forming an adhesively bonded article, comprising the steps of: (a) providing at least one first article having at least one first surface; (b) electrostatically delivering particles using an electromagnetic brush printing apparatus for forming a precursor layer which exhibits high impact resistance to the at least one first surface; wherein the particles include precursors for defining a latent curing polymeric material that exhibits adhesive characteristics upon curing, have an average size in the range of about 20 to about 300 microns, and are characterized as a one component substantially solid precursor formulation that is free of any solvent; (c) physically transforming the particles of the precursor layer, which includes heating the particles to a temperature at which the precursor formulation softens and flows as a thermoplastic material, but below which it will cross-link for forming a thermoset material, to form a substantially non-oriented fused precursor layer film that is tack-free and dry to the touch while on the at least one first surface and throughout which it remains unexposed to a reaction activation condition and having a generally uniform thickness of less than about 0.3 mm; (d) applying at least one second substrate to contact at least a portion of the precursor layer film; (e) subjecting the precursor layer film to the reaction activation condition to cause cross-linking and to define a cross-linked reaction product material that adhesively bonds the at least one first substrate with the at least one second substrate; and wherein the precursor layer includes an epoxy resin, a curing agent, and an epoxy/elastomer adduct which includes about 1:5 to 1:6 parts of the epoxy to the elastomer, and the elastomer includes carboxy-terminated butyl nitrile.