COATING COMPOSITION FOR METAL SURFACE PRE-TREATMENT, ITS PREPARATION AND USE THEREOF
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United States of America Patent
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Feb 2, 2016
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Aug 6, 2013
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Abstract
This invention provided an aqueous coating composition for metal surface pre-treatment comprising:
- (i) at least one organosilane with at least one hydrolyzable substituent;(ii) at least one water soluble and/or water dispersible silane-functional oligomer;(iii) at least one water-soluble compound of the elements Zr and/or Ti;The resultant sol-gel coating composition reveals an extended shelf life and after surface pre-treatment using the invented coating compositions the metal substrates have higher resistance to corrosion, humidity and solvent and at the same time have better surface conductivity and paintability.
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