Method of improving the adhesion of plastics to metals in dental prostheses
AssigneeIvoclar AG
InventorsVolker Rheinberger, Peter Wollwage, Gerhard Zanghellini
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Abstract
In a process for improving the adhesion of plastics to metals in the production of dental prostheses, in which a silicon dioxide layer is applied to the metal surface and subsequently silanized and then the plastic and metal bonded together the improvement consisting essentially of, forming the silicon dioxide layer by (1) applying a silica sol or dispersion of very finely divided silica to the metal surface and (2) baking the sol or dispersion at a temperature of 100.degree. to 800.degree. C.
Claims15
In a process for improving the adhesion of plastics to metals in the production of dental prostheses, in which a silicon dioxide layer is applied to the metal surface and subsequently silanized and then the plastic and metal bonded together the improvement consisting essentially of, forming the silicon dioxide layer by (1) applying a silica sol or dispersion of very finely divided silica to the metal surface and (2) baking the sol or dispersion at a temperature of 100.degree. to 800.degree. C.
A process for bonding plastic to metal in the production of dental prosthesis, the steps consisting essentially of:
- a. sandblasting the metal surface to be bonded to plastic;
- b. forming a silica sol or a dispersion of very finely divided silica;
- c. applying the sol or dispersion to the sandblasted metal surface to form a coating of the sol or dispersion thereon;
- d. baking the sol or dispersion coating at a temperature 100.degree. to 800.degree. C.;
- e. silanizing the baked silica coating;
- and
- f. bonding the plastic to the metal surface.
Dependencies are inferred from the claim text.