Abstract

The present invention provides a coating for covering a metal medical product with which it is possible to adequately minimize cracking, twisting, and lack of hide on the edges of the dried coating film. The present invention relates to a coating for covering a metal medical product characterized by including a solvent, particles of a thermoplastic resin (A) that does not dissolve in the solvent, and a thermoplastic resin (B) that dissolves in the solvent.

IPC Classes  ?

• C09D 201/00 - Coating compositions based on unspecified macromolecular compounds
• A61C 7/14 - BracketsFixing brackets to teeth
• A61C 7/20 - Arch wires
• C09D 167/03 - Polyesters derived from dicarboxylic acids and dihydroxy compounds the dicarboxylic acids and dihydroxy compounds having the hydroxy and the carboxyl groups directly linked to aromatic rings
• C09D 169/00 - Coating compositions based on polycarbonatesCoating compositions based on derivatives of polycarbonates
• C09D 181/06 - PolysulfonesPolyethersulfones

Abstract

This surface treatment method comprises a rustproofing step, a rinsing step, and a cleaning step. In the rustproofing step, a rustproofing liquid containing orthophosphoric acid and an organic acid is used to perform a rustproofing treatment on the surface of a steel material. In the rinsing step, a treatment liquid containing an oxo acid salt of a transition metal is used to perform a rinsing treatment on the surface of the steel material. In the cleaning step, the surface of the steel material that has undergone the rinsing step is subjected to a cleaning treatment.

IPC Classes  ?

• C23C 22/08 - Orthophosphates
• C23C 22/83 - Chemical after-treatment
• C23C 8/42 - Solid state diffusion of only non-metal elements into metallic material surfacesChemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using liquids, e.g. salt baths, liquid suspensions only one element being applied
• C23C 22/47 - Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH < 6 containing oxalates containing also phosphates
• C23C 8/80 - After-treatment
• C23C 22/82 - After-treatment

Abstract

This surface treatment method comprises a rust proofing step, a rinsing step and a cleaning step. In the rust proofing step, a rust proofing treatment is carried out on the surface of a steel material using a rust proofing liquid that contains orthophosphoric acid and an organic acid. In the rinsing step, a rinsing treatment is carried out on the surface of the steel material using a treatment liquid containing an oxo acid salt of a transition metal. In the cleaning step, a cleaning treatment is carried out on the surface of the steel material after the rinsing step.

IPC Classes  ?

• C23C 22/17 - Orthophosphates containing zinc cations containing also organic acids
• C23C 22/83 - Chemical after-treatment