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Stabilizing aqueous anionic resinous dispersions with chelating agents

一种水性分散体、阴离子树脂的技术，应用在涂层、电泳涂料等方向，能够解决分散体不稳定等问题

Active Publication Date: 2010-08-18
PPG IND OHIO INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Unfortunately, these dispersions are unstable

Method used

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  • Stabilizing aqueous anionic resinous dispersions with chelating agents
  • Stabilizing aqueous anionic resinous dispersions with chelating agents

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Abstract

Stabilization of aqueous resinous dispersions containing a pigment of a divalent metal such as strontium chromate is disclosed. Stabilization is achieved by incorporating a chelating agent in the dispersion.

Description

field of invention The present invention relates to anionic aqueous dispersions containing divalent metal pigments and to the stabilization of these dispersions. Background technique Aqueous anionic resin dispersions containing divalent metal pigments such as strontium chromate are known for coating aluminum substrates, with the strontium chromate providing outstanding corrosion protection. Unfortunately, these dispersions are unstable. It is believed that the divalent metal cations cause the anionic resin to settle out of the dispersion. It would be desirable to stabilize the aqueous resin dispersions described above. Summary of the invention According to the invention, the aqueous anionic resin dispersion comprises divalent metal pigments, in particular divalent metal pigments which also contain chromium. The aforementioned pigments, such as strontium chromate, are stabilized by adding chelating agents to the dispersion. The stable aqueous dispersion is particularly...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D5/44
CPCC09D5/4419
Inventor J·T·沃克C·A·威尔逊R·M·派弗尔
Owner PPG IND OHIO INC
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