EP 3802915 A1 20210414 - AQUEOUS DISPERSION FOR ACTIVATING A METAL SURFACE, AND METHOD FOR THE PHOSPHATISATION THEREOF
Title (en)
AQUEOUS DISPERSION FOR ACTIVATING A METAL SURFACE, AND METHOD FOR THE PHOSPHATISATION THEREOF
Title (de)
WÄSSRIGE DISPERSION ZUR AKTIVIERUNG EINER METALLOBERFLÄCHE UND VERFAHREN ZU DESSEN PHOSPHATIERUNG
Title (fr)
DISPERSION AQUEUSE POUR L'ACTIVATION D'UNE SURFACE MÉTALLIQUE ET SON PROCÉDÉ DE PHOSPHATATION
Publication
Application
Priority
- EP 18176991 A 20180611
- EP 2019065005 W 20190607
Abstract (en)
[origin: WO2019238573A1] The present invention relates to an aqueous dispersion as concentrate for the activation stage of a phosphatisation of metal surfaces, the dispersion containing a dispersed particulate constituent and a thickener, wherein the particulate constituent contains, in addition to dispersed inorganic compounds of polyvalent metal cations, polymeric organic compounds as dispersants, which are composed at least partially of styrene and/or an α-olefin having no more than 5 carbon atoms and maleic acid, the anhydride and/or imide thereof, and which addtionally comprise polyoxyalkylene units. The aqueous dispersion is also characterised by a D50 value above 10 µm. The present invention also relates to a method for pre-treating the surfaces of a metallic material in order to protect them against corrosion, in particular a method for zinc phosphatisation.
IPC 8 full level
C23C 22/78 (2006.01); C23C 22/36 (2006.01)
CPC (source: EP KR US)
C23C 22/12 (2013.01 - US); C23C 22/362 (2013.01 - EP KR); C23C 22/78 (2013.01 - EP KR US); C23F 11/10 (2013.01 - US)
Citation (search report)
See references of WO 2019238573A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
WO 2019238573 A1 20191219; BR 112020024936 A2 20210309; CA 3103058 A1 20191219; CN 112236546 A 20210115; CN 112236546 B 20230808; EP 3802915 A1 20210414; JP 2021527150 A 20211011; JP 7390318 B2 20231201; KR 20210019436 A 20210222; MX 2020013378 A 20210309; US 2021087693 A1 20210325
DOCDB simple family (application)
EP 2019065005 W 20190607; BR 112020024936 A 20190607; CA 3103058 A 20190607; CN 201980037842 A 20190607; EP 19728707 A 20190607; JP 2020568765 A 20190607; KR 20207035284 A 20190607; MX 2020013378 A 20190607; US 202017106337 A 20201130