Global Patent Index - EP 1047508 A1

EP 1047508 A1 2000-11-02 - PROCESS FOR IMPROVING THE CORROSION RESISTANCE OF A METAL SURFACE

Title (en)

PROCESS FOR IMPROVING THE CORROSION RESISTANCE OF A METAL SURFACE

Title (de)

VERFAHREN ZUR VERBESSERUNG DER ROSTBESTÄNDIGKEIT EINER METALLOBERFLÄCHE

Title (fr)

PROCEDE AMELIORANT LA RESISTANCE A LA CORROSION D'UNE SURFACE METALLIQUE

Publication

EP 1047508 A1 (EN)

Application

EP 99903009 A

Priority

  • JP 607898 A
  • US 9900377 W

Abstract (en)

[origin: WO9936192A1] 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.

IPC 1-7 (main, further and additional classification)

B05D 1/36; B05D 7/14

IPC 8 full level (invention and additional information)

B05D 3/10 (2006.01); B05D 5/00 (2006.01); B05D 7/14 (2006.01); C09D 5/08 (2006.01); C09D 161/20 (2006.01); C09D 201/06 (2006.01); C09D 201/08 (2006.01); C23C 22/06 (2006.01); C23C 22/74 (2006.01)

CPC (invention and additional information)

C09D 5/088 (2013.01); B05D 7/142 (2013.01); B05D 7/144 (2013.01)

Citation (search report)

See references of WO 9936192A1

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

EPO simple patent family

WO 9936192 A1 19990722; AU 2313099 A 19990802; CA 2318442 A1 19990722; EP 1047508 A1 20001102; JP 3736958 B2 20060118; JP H11197597 A 19990727; KR 19990067884 A 19990825; TW 464545 B 20011121; ZA 9900221 B 19990714

INPADOC legal status


2004-03-10 [18W] WITHDRAWN

- Effective date: 20031127

2000-11-02 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20000809

2000-11-02 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE