Process for improving the adhesion of polymeric materials to metal surfaces
OwnerDonald Ferrierinventor
Life of this patent
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Abstract
A process is described for treating metal surfaces with a composition comprising an oxidizer, an acid, a corrosion inhibitor, a benzotriazole with an electron withdrawing group in the 1-position which electron withdrawing group is a stronger electron withdrawer than a hydrogen group, and optionally, a source of adhesion enhancing species selected from the group consisting of molybdates, tungstates, tantalates, niobates, vanadates, isopoly or heteropoly acids of molybdenum, tungsten, tantalum, niobium, vanadium, and combinations of any of the foregoing in order to increase the adhesion of polymeric materials to the metal surface.
Claims29
A process for increasing the adhesion of a polymeric material to a metal surface, which metal surface comprises copper, said process comprising:
- a). contacting the metal surface with an adhesion-promoting composition comprising:
- 1. 2 to 60 grams per liter of hydrogen peroxide;
- 2. 5 to 360 grams per liter of an inorganic acid;
- 3. a benzotriazole with an electron withdrawing group in the 1-position which electron withdrawing group is a stronger electron withdrawer than a hydrogen group;
- and
- b. bonding the polymeric material to the metal surface.
A process for increasing the adhesion of a polymeric material to a metal surface, wherein the metal surface comprises copper, said process comprising:
- a). contacting the metal surface with an adhesion-promoting composition comprising:
- 1. 2 to 60 grams per liter of hydrogen peroxide;
- 2. 5 to 360 grams per liter of an inorganic acid;
- 3. 0.2 to 20 grams per liter of a corrosion inhibitor;
- 4. a benzotriazole with an electron withdrawing group in the 1-position which electron withdrawing group is a stronger electron withdrawer than a hydrogen group;
- and
- 5. optionally, a source of adhesion enhancing species, which species are selected from the group consisting of molybdates, tungstates, tantalates, niobates, vanadates, isopoly or heteropoly acids of molybdenum, tungsten, tantalum, niobium, vanadium, and combinations of any of the foregoing.
- b) bonding the polymeric material to the metal surface.
A composition useful in treating metal surfaces prior to bonding polymeric materials to the metal surfaces, said composition comprising:
- a. 2 to 60 grams per liter of hydrogen peroxide;
- b. 5 to 360 grams per liter of an inorganic acid;
- c. a corrosion inhibitor;
- d. a benzotriazole with an electron withdrawing group in the 1-position which electron withdrawing group is a stronger electron withdrawer than a hydrogen group;
- and
- e. optionally, a source of adhesion enhancing species, which species are selected from the group consisting of molybdates, tungstates, tantalates, niobates, vanadates, isopoly or heteropoly acids of molybdenum, tungsten, tantalum, niobium, vanadium, and combinations of any of the foregoing.
A composition useful in treating metal surfaces prior to bonding polymeric materials to the metal surfaces, said composition comprising:
- a. 2 to 60 grams per liter of hydrogen peroxide;
- b. 5 to 360 grams per liter of an inorganic acid;
- c. 1 -hydroxybenzotriazole;
- and
- d. optionally, a source of adhesion enhancing species, which species are selected from the group consisting of molybdates, tungstates, tantalates, niobates, vanadates, isopoly or heteropoly acids of molybdenum, tungsten, tantalum, niobium, vanadium and combinations of the foregoing.
A composition useful in treating metal surfaces prior to bonding polymeric materials to metal surfaces, said composition comprising:
- a. an oxidizer;
- b. an acid;
- c. a benzotriazole with an electron withdrawing group in the 1-position which electron withdrawing group is a stronger electron withdrawer than a hydrogen group.
Dependencies are inferred from the claim text.