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Latent coating for metal surface repair

A potential, anti-corrosion coating technology, used in powder coatings, anti-corrosion coatings, coatings, etc., to solve problems such as effective application operations that affect the smoothness of the coating

Inactive Publication Date: 2001-03-07
3M CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, hollow fibers are not suitable for thin coatings, and their size will affect the smoothness of the coating and effective application operation on metal

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] The preparation of embodiment 1 microcapsule

[0057] Urea 155.21g Melamine 27.39g formaldehyde 484.20g Potassium tetraborate 160.00g water 831.60g

[0058] The components of the precondensation composition are mixed together in a suitable vessel and stirred at 75°C for 2.5 hours. The precondensed composition was then aged for 24 hours.

[0059] water 282.33g precondensed composition 313.80g carboxymethyl cellulose 1.26g sodium sulfate 59.61g 25% Glutaraldehyde 4.35g

[0060] The aqueous dispersed phase composition was loaded into a cylindrical reactor lined with polyethylene, and four baffles were vertically placed equidistantly on the inner wall of the reactor. The dispersed phase was stirred by a turbine stirrer at 2400 rpm.

[0061] EPON 160 23.09g Benzothiazole 103.9g NACORR 1153 103.9g

[0062] When the non-aqueous capsule filling composition is added to the...

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Abstract

A corrosion protective coating composition, applied over a metal surface, contains frangible microcapsules which rupture and release fluid upon impact or other stress likely to damage the coating. The fluid, from the microcapsules, contains a film forming component to cover the damaged area of the coating and a corrosion inhibitor for the metal surface.

Description

background of the invention [0001] The present invention relates to protective coatings for in situ repairing of the surface of metal parts damaged by mishandling or stressful environments after the coating has been applied. This repair is accomplished using materials added to the protective paint. In particular, suitable materials are preferably fluid formulations contained in friable microcapsules. When the coating is damaged, the capsule ruptures, releasing a fluid containing the corrosion inhibitor and film-forming components in the vicinity of the damage. The fluid flows over exposed metal surfaces, filling pits and cracks in the coating, and renewing the protective barrier on the metal surface. background of the invention [0002] There are many instances where metal structures are subject to oxidation corrosion and ultimately fail to serve their intended purpose. Examples of damaged metals by corrosion include degradation of heat exchanger elements, corrosion of pi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D201/00C09D5/03C09D5/08C09D7/48
CPCC08K9/10B29C73/163C08K5/3462C09D5/08C08L2207/53C08K5/5398C09D7/00B29C73/22Y10T428/2985C09D7/1291C09D7/70C09D7/48
Inventor C·R·吉伯特D·G·埃诺斯C·E·博耶三世
Owner 3M CO
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