Global Patent Index - EP 0866887 A4

EP 0866887 A4 2001-04-11 - FINELY CRYSTALLINE AND/OR FAST PHOSPHATE CONVERSION COATING COMPOSITION AND PROCESS

Title (en)

FINELY CRYSTALLINE AND/OR FAST PHOSPHATE CONVERSION COATING COMPOSITION AND PROCESS

Title (de)

ZUSAMMENSETZUNG UND VERFAHREN ZUR SCHNELLEN PHOSPHATUMWANDLUNGSBESCHICHTUNG UND/ODER MIT FEINEN KRISTALLEN

Title (fr)

COMPOSITION POUR REVETEMENT DE CONVERSION EN PHOSPHATE RAPIDE ET/OU A CRISTAUX FINS ET PROCEDE D'UTILISATION

Publication

EP 0866887 A4 (EN)

Application

EP 96936939 A

Priority

  • US 9617086 W
  • US 629495 P

Abstract (en)

[origin: WO9717480A1] A combination of difunctional organic acid, preferably a hydroxy acid such as citric acid, or salt thereof with acrylic acid/acrylate polymers in zinc phosphate conversion coating forming liquid compositions, preferably also containing hydroxylamine, results in crystal size refinement in the coating formed and/or faster formation of a sufficiently thick conversion coating to protect against subsequent rusting of a ferrous substrate.

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

C23C 22/17

IPC 8 full level (invention and additional information)

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

CPC (invention and additional information)

C23C 22/365 (2013.01); C23C 22/17 (2013.01)

Citation (search report)

  • [A] US 3346426 A 19671010 - LOUIS SCHLOSSBERG
  • [A] SUGAMA T ET AL: "ADVANCED POLY(ACRYLIC)ACID-MODIFIED ZINC PHOSPHATE CONVERSION COATINGS: USE OF COBALT AND NICKEL CATIONS", SURFACE AND COATINGS TECHNOLOGY,ELSEVIER, AMSTERDAM,NL, vol. 50, no. 2, 1992, pages 89 - 95, XP000944764, ISSN: 0257-8972
  • See also references of WO 9717480A1

Designated contracting state (EPC)

BE DE ES FR GB IT SE

EPO simple patent family

WO 9717480 A1 19970515; AR 004289 A1 19981104; AU 7473196 A 19970529; BR 9611356 A 19990504; CN 1201495 A 19981209; EP 0866887 A1 19980930; EP 0866887 A4 20010411; JP 2000515586 A 20001121; ZA 9609146 B 19970527

INPADOC legal status


2002-01-23 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20010508

2001-04-11 [A4] SUPPLEMENTARY SEARCH REPORT

- Effective date: 20010222

2001-04-11 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A4

- Designated State(s): BE DE ES FR GB IT SE

1998-09-30 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 19980604

1998-09-30 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): BE DE ES FR GB IT SE