Metal-acrylate curing agents
View Patent ↗The disclosure relates to using metal acrylate compounds such as zinc diacrylate (ZDA), zinc dimethacrylate (ZDMA), among others for curing epoxy functional (and other cross-linking compounds), and to compositions containing such compounds for use in powder coat, film, adhesive, among other applications. ZDA and ZDMA containing compounds can cure the epoxy component of the compositions while being substantially free of conventional curing agents.
1. A film adhesive comprising a heat curable composition comprising at least one epoxy functional compound, and about 5 to about 20 wt. percent of at least one metal acrylate curing agent and wherein the composition is substantially free of conventional curing agents.
2. The film adhesive of claim 1 comprising a heat curable composition comprising at least one curable compound, and at least one curing agent selected from the group consisting of metal acrylates, metallic diacrylates, metallic dimethacrylates and metallic monomethacrylate wherein the composition is substantially free of peroxides, amines, polyamides, dicyandiamide, polysulfides, anhydrides, melamines, ureas, anhydrides, imidazole and imidazole compounds, boron trifluoride and complexes, amidoamines, and phenol/formaldehydes.
3. The film adhesive of claim 1 wherein the film adhesive is reinforced.
4. The film adhesive of claim 3 wherein the reinforcement comprises at least one member selected from the group consisting of scrim, web, matte, mesh, perforated or unperforated films and woven or unwoven assemblage.
5. The film adhesive of claim 1 wherein the epoxy functional compound comprises at least one member selected from the group consisting of polybutadiene, melamine, isocyanates, bis A epoxy, bis F epoxy, cycloaliphatic epoxy, novolac compounds, epoxy esters, alkyds and alkyd functional materials, polyesters and acrylates.
6. The film adhesive of claim 1 wherein the film adhesive further comprises at least one filler selected from the group consisting of at least one silicate, silica, trihydrates, carbonates, bitumins, and clays.
7. The film adhesive of claim 1 wherein the composition further comprises at least one filler material selected from the group of reactive resin composition.
8. The film adhesive of claim 1 wherein the film adhesive further comprises at least one additive selected from the group consisting of metal powders, magnetic materials, ceramic powders, plastic powders and resins.
9. The film adhesive of claim 1 wherein the composition further comprises at least one reinforcement.
10. The film adhesive of claim 9 wherein the reinforcement comprises at least one of fibers or film.
11. The film adhesive of claim 2 further comprising at least one complexing agent selected from the group consisting of zirconates and titanates.
12. The film adhesive of claim 1 wherein the metal acrylate curing agent comprises at least one member selected from the group consisting of zinc diacrylate, zinc dimethacrylate, magnesium diacrylate, mixtures thereof and aqueous solutions thereof.
13. The film adhesive of claim 2 wherein the metal acrylate curing agent comprises at least one of zinc diacrylate and dimethacrylate.
14. The film adhesive of claim 12 wherein the metal acrylate curing agent comprises at least one of zinc diacrylate, zinc dimethacrylate and magnesium diacrylate.
15. The film adhesive of claim 1 further comprising at least one member selected from the group consisting of silanes and polysiloxanes.
16. A powder coat comprising a heat curable composition comprising at least one epoxy functional compound, and about 5 to about 20 wt. percent of at least one metal acrylate curing agent and from about 20 to about 50 wt. percent of a reactive resin and wherein the composition is substantially free of conventional curing agents.
17. The powder coat of claim 16 wherein the coating comprises at least one member selected from the group consisting of epoxy functional e-coatings and epoxy functional powder coatings.
18. The powder coat of claim 16 wherein the reactive resin is selected from the group consisting of epoxy, phenoxy, acrylic urethane and mixtures thereof.
19. The powder coat of claim 16 comprising a heat curable composition comprising at least one curable compound, and at least one curing agent selected from the group consisting of metal acrylates, metallic diacrylates, metallic dimethacrylates and metallic monomethacrylate wherein the composition is substantially free of peroxides, amines, polyamides, dicyandiamide, polysulfides, anhydrides, melamines, ureas, anhydrides, imidazole and imidazole compounds, boron trifluoride and complexes, amidoamines, and phenol/formaldehydes.