Henkel Ag & Company, Kgaa

Henkel IP Holding Gmbh

Nils Bongartz

Jerzy-Tadeusz Wawrzyniak

Dalija Ehmann

Ligang Zhao

Henry Rossmaier

Ralf Posner

Ciaran Mcardle

Kirsten Agnes Lill

Roberto Pela

Weifeng Dai

Eva Maria Alcazar

Maria Merce Bertomeu

Jun Liu

Matilde Senatore

Henry A Rossmaier

Dalija Vrban

Maria Mercé Arasa Bertomeu

Eva María Alcazár

The present invention relates to a method for the corrosion-protective and cleaning pretreatment of metallic components, produced at least partially from metallic materials from the elements iron, zinc and/or aluminum, with the use of an acid aqueous composition containing, in addition to the water-soluble compounds of the elements Zr and/or Ti causing the conversion of the metal surface, a mixture of an aliphatic diol and an aliphatic saturated polyhydroxy compound. It also comprises a chrome(VI)-free aqueous composition based on the constituents mentioned above which delivers outstanding results in cleaning and simultaneous corrosion-protective conversion of technical metal surfaces in one method step.

Method for corrosion-protective and cleaning pretreatment of metallic components

The invention relates to a multiple-step method for the corrosion-protective pretreatment of components, said pretreatment being at least partially produced from a metal material predominantly consisting of at least one of the elements iron zinc and/or aluminium, according to which the components are first brought into contact with an acid aqueous composition (A) containing water-soluble compounds of the elements Zr and/or Ti and then with an acid aqueous composition (B) containing phosphate ions and an accelerator. The method is particularly suitable for the pretreatment before an electrocoating.

Method for the anti-corrosion and cleaning pretreatment of metal components

The invention relates to a compound comprising at least two &#x2014;(NH&#x2014;C&#x2550;O)&#x2014; groups and at least two &#x2014;(C&#x2550;O)&#x2014;C&#x2261;C&#x2014;Rgroups, wherein Rrepresents hydrogen or a group having from 1 to 12 carbon atoms; a curable composition comprising a first unit comprising at least two &#x2014;(NH&#x2014;C&#x2550;O)&#x2014; groups, a second unit comprising at least two &#x2014;(C&#x2550;O)&#x2014;C&#x2261;C&#x2014;Rgroups, and a catalyst; and the use of the composition as an adhesive, coating, casting composition or as sealant.

NCO-free compounds and usage thereof in a curable composition

The subject matter of the present invention is a multi-step method for the anti-corrosive coating of metal components, in which a reaction rinse is used after a conversion treatment but before electrodeposition is carried out on the component. The conversion treatment includes first the deposition of a thin inorganic layer containing the elements Zr and/or Ti. The metal component is then treated with a reaction rinse containing a surface-active substance and is subsequently subjected to electrodeposition.

Multi-step method for electrodeposition

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Haan, Germany

Nils Bongartz