Process for improving the corrosion resistance of a metal...

B - Operations – Transporting – 05 – D

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

B05D 1/36 (2006.01) B05D 7/14 (2006.01) C09D 5/08 (2006.01)

Patent

CA 2318442

A resin coating is formed on a metal surface using an aqueous autodepositing resin composition that contains oxidizing agent, acid, and carboxyl-functional and/or hydroxyl-functional water-dispersible or water-soluble resin and, optionally, metal ions; the resulting coating, while still in its uncured condition, is subjected to post-treatment with an aqueous solution containing from 0.5 to 5.0 g/L of amine and from 10 to 100 g/L (solids) of water-soluble amino resin molecules that bear at least two alkoxymethylamino, methylolamino, and/or imino groups; and the coating is then dried and cured. This provides a highly anticorrosive coating on the metal, and contrary to an analogous process in which the post-treatment solution contains amino resin but not amine, the post-treatment solution remains stable and provides continuing high quality coating performance even after a considerable amount of metal surface per unit volume of post-treatment solution has been processed.

L'invention consiste à former sur une surface métallique un revêtement en résine, au moyen d'une composition de résine aqueuse à auto-déposition, contenant un agent oxydant, un acide et une résine soluble ou dispersible dans l'eau, à fonction carboxyle et/ou hydroxyle, et éventuellement, des ions métalliques. Le revêtement ainsi obtenu, alors qu'il est encore à l'état non durci, est soumis à un post-traitement avec une solution aqueuse contenant entre 0,5 et 5,0 g/L d'une amine et entre 10 et 100 g/l (solides) de molécules de résine aminique solubles dans l'eau, portant au moins deux groupes alcoxyméthylamino, méthylolamino et/ou imino. Le revêtement est ensuite séché et durci. Ce procédé permet d'obtenir sur le métal un revêtement hautement anticorrosion, et contrairement à un procédé analogue dans lequel la solution de post-traitement contient une résine aminique mais pas d'amine, cette solution de post-traitement reste stable et assure une efficacité de revêtement continue, de haute qualité, même après qu'on ait traité une surface métallique très importante par volume unitaire de solution de post-traitement.

LandOfFree

Say what you really think

Search LandOfFree.com for Canadian inventors and patents. Rate them and share your experience with other people.

Rating

Process for improving the corrosion resistance of a metal... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for improving the corrosion resistance of a metal..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for improving the corrosion resistance of a metal... will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFCA-PAI-O-1855760

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.