Primer for coating coiled wires

摘要

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 −20° C. to 40° C. and a hard phase having a Tg in the range of from 25° C. to 120° 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.

主权项

1. A method for providing a metal wire with a coating system comprising at least a primer and a topcoat, the method comprising:
I) applying directly onto the metal wire a primer coating composition, and allowing the primer to at least partially dry: II) applying a topcoat coating composition; III) curing the topcoat; wherein the primer coating composition is an aqueous composition having a minimum film forming temperature of below 40° C., comprising a multiphase vinyl polymer, comprising a first phase having a Tg in the range of from −20° C. up to 40° C., and a second phase having a Tg in the range of from 25° C. to 120° C., with the Tg of the second phase being higher than the Tg of the first phase.