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Stable, non-chrome, thin-film organic passivates

A non-ionic, fluoride-based technology used in the field of solid alloys of aluminum and/or zinc to address issues affecting, undesired physical properties of metal coils

Inactive Publication Date: 2008-01-09
HENKEL KGAA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Another drawback of prior art organic passivation compositions is their undesired effect on the physical qualities of the metal coil

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-5

[0077] Applicants prepared a series of latexes found in non-chromium thin film organic passivators to evaluate stability at low pH conditions.

Embodiment 1

[0078] Example 1 is a cationic latex stabilized by the addition of nonionic surfactants. The nonionically stabilized cationic latex was prepared according to the following steps:

[0079] Table 1

[0080] part

[0081] Part (A) was added to a 2-liter four-necked flask equipped with a stirrer, condenser, and nitrogen inlet. Stir and apply a nitrogen blanket. Add parts (B) and (C) and mix by shaking in separate containers until a uniform stable dispersion is obtained. Add (E) and (F) to separate beakers and stir to form a clear solution. The flask was heated to 40°C, at which time (B) was added followed immediately by (D1)-(D4). The contents of the flask were exothermed to a temperature of 75°C over 30 minutes, after which time (C), (E) and (F) were added at a uniform rate over 2 hours. During this two hour addition, the temperature was maintained at 65°C. After the addition was complete, (G) was used to rinse the residue of (C) into the flask. The temperature ...

Embodiment 2

[0082] Example 2 is a cationic latex similar to Example 1 but without the use of amine monomers. The nonionic stabilized cationic latex was prepared according to the following procedure and stabilized by nonionic surfactants:

[0083] Table 2

[0084] part

[0085] Part (A) was added to a 2-liter four-necked flask equipped with a stirrer, condenser, and nitrogen inlet. Stir and apply a nitrogen blanket. Add part (B) and mix by shaking in the vessel until a uniform stable dispersion is obtained. Add (D) and (E) to separate beakers and stir to form a clear solution. The flask was heated to 40°C, at which time 180.7 g of (B) were added followed immediately by (C1)-(C4). The contents of the flask were exothermed to a temperature of 75°C over 30 minutes, after which time the remaining (B), (D) and (E) were added at a uniform rate over 2 hours. During this two hour addition, the temperature was maintained at 65°C. After the addition was complete, (F) was used to rin...

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PUM

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Abstract

Storage-stable organic passivate formulations that are essentially chromium-free are provided comprising non-ionic or non-ionically stabilized organic film forming resin; at least one complex fluoride and optionally, dissolved phosphate anions, at least one component comprising vanadium, at least one inorganic oxide in dispersed form; and at least one wax in dispersed form.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to US Provisional Application Serial No. 60 / 644,191 filed January 14, 2005 and incorporated herein by reference in its entirety. field of invention [0003] The present invention relates to compositions and methods for passivating, ie forming, corrosion resistant surface layers on metal surfaces, preferably predominantly aluminum and / or zinc. A wide variety of these surfaces are commonly used, including many types of galvanized and / or aluminized steel, and the invention is applicable to aluminium- and / or zinc-containing surfaces other than the underlying metal, as well as to aluminum and / or A solid alloy of zinc. Background of the invention [0004] Zinc (zinc-containing) and zinc-alloy (eg aluminium-containing) coatings are frequently used to protect steel from corrosion. Two common types of metal-coated steel that are commonly used are Galvanized Steel (Zinc) and Galvalume  (55% ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C22/36C09D5/08C23C22/44C09D5/00
CPCC09D5/084C09D5/008C23C22/44C09D5/08C23C22/361Y10T428/31678
Inventor J·索希J·D·麦吉G·T·唐纳尔森T·S·史密斯二世B·巴梅尔
Owner HENKEL KGAA
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