Dsm IP Assets B.v.

Hinrike Malda

Jurgen Scheerder

Rajasingham Satgurunathan

Gerardus Cornelis Overbeek

Ronald Tennebroek

Tijs Nabuurs

Marnix Rooijmans

Roel Johannes Marinus Swaans

Paul Wyman

Maud Kastelijn

De Nik Bont

Mamix Rooijmans

Thomas L M Frijns

Frijns Thomas LM LM

Rajasingham Satguranathan

Hubertus HGJ Frijns

An aqueous polymer composition which when in the form of a film shows excellent elongation at break comprising (i) 5 to 30 wt. % of polyurethane where the acid value of the polyurethane is between 3 to 40 mg KOH/g; (ii) 70 to 95 wt. % of vinyl polymer comprising 20 to 90 wt. % of vinyl polymer with Tg&#x3c;20&#xb0; C.; 10 to 80 wt. % of vinyl polymer with Tg&#x2265;20&#xb0; C.; where at least one of the vinyl polymers contains acid functional groups with acid value in the range of from 15 and 240 mg KOH/g.

Aqueous composition with improved elongation at break

Disclosed is a method to provide a metal wire with a coating system comprising a primer and a topcoat, particularly a hydrophilic, lubricious topcoat. The method comprises applying directly onto the wire metal a primer coating composition, which is an aqueous coating composition comprising a multiphase vinyl polymer, the polymer comprising a first phase having a Tg in the range of from &#x2212;20&#xb0; C. to 40&#xb0; C. and a hard phase having a Tg in the range of from 25&#xb0; C. to 120&#xb0; C. The primer has good adhesion to both the metal surface and the topcoat, and provides the eventual coating system with, inter alia, a good flexibility.

Primer for coating coiled wires

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Hinrike Malda