Coating composition for a metal substrate
AssigneeDacral
InventorsJean-Marie Poulet, Alain Chesneau, Georges Leger, Denis Begue
Life of this patent
Estimating the term…
Abstract
The invention relates to a coating composition for a metal substrate exhibiting a free outer surface consisting of a metal coating based on zinc or a zinc-based alloy, characterized in that it comprises: silicate(s) of sodium and/or potassium and/or lithium (3-35 wt. %), a tensioning agent (0.01-1 wt. %), the remainder being water in a quantity sufficient to arrive at 100 %.
Claims37
Coating composition for a metal substrate having a free outer surface, formed by a layer of zinc or of a zinc-based alloy, wherein it comprises (in % by weight):
- sodium and/or potassium
- and/or lithium silicate(s):
- 3%-35%
- surfactant:
- 0.01%-1%
- a silane, in a proportion that makes it possible to obtain up to 50% by weight of the dry coating film,
- water:
- qsp 100%.
Coating composition according to wherein the lubricant is added to the said coating composition in a proportion that makes it possible to obtain up to 15% by weight of the dry coating film, preferably between 1.5 and 15% by weight of the dry coating film, more preferably between 3 and 15% by weight of the dry coating film and even more preferably between 5 and 15% by weight of the dry coating film.
Dependencies are inferred from the claim text.