Metal pretreatment with acidic aqueous compositions comprising silanes

• Main Authors: WAN FRANK, ZHANG QI, STODT JURGEN, WOLPERS MICHAEL, SUNDERMEIER UTA
• Format: Patent
• Language: Chinese; English
• Published: 28.09.2016
• Subjects: ADHESIVES; CHEMICAL PAINT OR INK REMOVERS; CHEMICAL SURFACE TREATMENT; CHEMISTRY; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS; COATING MATERIAL WITH METALLIC MATERIAL; COATING METALLIC MATERIAL; CORRECTING FLUIDS; DIFFUSION TREATMENT OF METALLIC MATERIAL; DYES; FILLING PASTES; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; INKS; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; PAINTS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; POLISHES; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; USE OF MATERIALS THEREFOR; WOODSTAINS

The object of the underlying invention consists of an acidic aqueous metal pretreatment solution that comprises amino-functional organosilanes, complex anions of the elements Zr, Ti, Hf and/or Si as well as oxyacids of phosphorus. These types of metal pretreatment solutions effectively reduce temporary corrosion when applied to metal surfaces and in addition confer good adhesion properties for subsequently coated organic lacquers. The invention consequently also encompasses a process for the treatment of metal substrates, especially selected from zinc and zinc-coated steel substrates, wherein metal pretreatment solutions of this invention are applied. 本发明的目的由以下组成：包含氨基官能化的有机硅烷、元素Zr、Ti、Hf和/或Si的配位阴离子以及磷的含氧酸的的酸性金属预处理水溶液。这些类型的金属预处理溶液当被施用至金属表面时有效地降低暂时腐蚀并且此外赋予对随后涂布的有机漆的良好附着性质。本发明因此还涵盖用于处理金属基底的方法，所述金属基底特别地选自锌和镀锌钢基底，其中施用本发明的金属预处理溶液。