Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for coating metallic surfaces with an aqueous composition

A composition and metal technology, applied in the direction of surface coating liquid device, special surface, pretreatment surface, etc., can solve the problem of insufficient performance

Active Publication Date: 2008-01-02
CHEMETALLGMBH
View PDF1 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The corrosion protection of the resulting siloxane- and / or polysiloxane-rich coatings and the adhesion of the lacquer layer are often, but not always, high; in some cases, even where appropriate, these Performance is still not high enough for special purposes

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment and

[0165] Embodiment and comparative example:

[0166] The inventive examples (B) and comparative examples (VB) described below are intended to illustrate the subject-matter of the invention in more detail.

[0167] Aqueous bath compositions were prepared using mixtures according to Table 1 using silanes which had been prehydrolyzed. They contain in each case mainly one silane and optionally also small amounts of at least one other similar silane, the term silane being used here for simplicity instead of silane / silanol / siloxane / polysiloxane Alkanes, and where generally these various compounds, sometimes in the form of a relatively large number of similar compounds, also enter into the formed coating, so that a plurality of similar compounds are often present in the coating as well. Depending on the silane, the prehydrolysis step can also continue for several days at room temperature with vigorous stirring, if the silane used is not already present in prehydrolyzed form. The pr...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A process for producing a repair coating on at least one metallic surface that is coated with at least one corrosion protecting coating A applied with at least one composition selected from the group of pretreatment compositions, of organic compositions and of silicon compound(s) containing compositions, whereby the at least one corrosion protecting coating A has been at least partially removed in the area Z, whereby a thin corrosion protecting coating B containing at least one silicon compound is applied with a solution or dispersion containing at least one silane, at least one silanol, at least one siloxane, at least one polysiloxane or any mixture of these (=''siloxane composition'') on at least a part of the area Z. Optionally, a further corrosion protecting coating C may be applied on the thin corrosion protecting coating B generated with the siloxane composition whereby the at least one further corrosion protecting coating C is generated with at least one organic composition like a primer, a wet-primer, an e-coat, a powder coat, a base-coat or a clear-coat or with at least one composition which is the same or another siloxane composition as for the thin film B.

Description

technical field [0001] The present invention relates to a method for coating metal surfaces with an aqueous composition comprising at least one silane or / and related compound and at least two other components. The invention also relates to the use of corresponding aqueous compositions and substrates coated according to the method of the invention. Background technique [0002] By far the most widely used method for the treatment of metal surfaces, especially parts, coils or coil parts made of at least one metallic material, or for the pretreatment of metal surfaces prior to painting them Usually based on the use of chromium(VI) compounds on the one hand, optionally together with various additives, or on the other hand on the use of phosphates, e.g. zinc / manganese / nickel phosphates, optionally together with various sample additives. [0003] Owing to the toxicological and ecological risks associated in particular with the use of chromate- or nickel-containing methods, alter...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C23C22/34C23C22/36C09D5/12
CPCB05C5/0291C23C2222/20Y02T50/67C09D5/084C23C18/122B05D7/14C23C18/127C23C18/1241B05D5/005B05D7/16B05C1/00C23C4/04C23C26/02B05D1/02B05D3/002B05D7/26B05D7/51B05D2202/00B05D2350/00B05D2350/10B05D2350/30B05D2350/38Y02T50/60
Inventor T·科尔伯格M·沃特P·舒巴克
Owner CHEMETALLGMBH