Global Patent Index - EP 0966554 A4

EP 0966554 A4 2000-04-05 - AQUEOUS PHOSPHATING COMPOSITION AND PROCESS FOR METAL SURFACES

Title (en)

AQUEOUS PHOSPHATING COMPOSITION AND PROCESS FOR METAL SURFACES

Title (de)

WÄSSRIGE PHOSPHATISIERUNGSZUSAMMENSETZUNG UND VERFAHREN FÜR METALLISCHE OBERFLÄCHEN

Title (fr)

COMPOSITION AQUEUSE DE PHOSPHATATION ET PROCEDE POUR SURFACES METALLIQUES

Publication

EP 0966554 A4 (EN)

Application

EP 98905967 A

Priority

  • JP 1135797 A
  • US 9800903 W

Abstract (en)

[origin: WO9832894A1] An aqueous zinc phosphate conversion coating that contains 5 to 50 g/L of phosphate ions, 0.2 to 10 g/L of zinc ions, and 0.5 to 4.0 g/L as hydroxylamine of a hydroxylamine source, and also: (1) contains 0.01 to 5.0 g/L polycarboxylic acid or salt thereof and/or starch phosphate; or (2) has a zinc ions/phosphate ions weight ratio below 0.27 and a zinc ions concentration of at least 2.0 g/L forms high quality zinc phosphating coatings on metal surfaces even if the surfaces have not been previously conditioned by contact with a dispersion of colloidal titanium.

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

C23C 22/07; C23C 22/12; C23C 22/17; C23C 22/36

IPC 8 full level (invention and additional information)

C23C 22/12 (2006.01); C23C 22/17 (2006.01); C23C 22/18 (2006.01); C23C 22/36 (2006.01)

CPC (invention and additional information)

C23C 22/17 (2013.01); C23C 22/12 (2013.01); C23C 22/184 (2013.01); C23C 22/362 (2013.01); C23C 22/364 (2013.01); C23C 22/365 (2013.01)

Citation (search report)

Designated contracting state (EPC)

DE ES FR GB

EPO simple patent family

WO 9832894 A1 19980730; CA 2277967 A1 19980730; EP 0966554 A1 19991229; EP 0966554 A4 20000405; JP H10204649 A 19980804

INPADOC legal status


2001-06-13 [18W] WITHDRAWN

- Date of withdrawal: 20010409

2000-04-05 [A4] SUPPLEMENTARY SEARCH REPORT

- Effective date: 20000218

2000-04-05 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A4

- Designated State(s): DE ES FR GB

2000-04-05 [RIC1] CLASSIFICATION (CORRECTION)

- Free text: 7C 23C 22/07 A, 7C 23C 22/17 B, 7C 23C 22/36 B, 7C 23C 22/12 B

1999-12-29 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 19990823

1999-12-29 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): DE ES FR GB