C - Chemistry – Metallurgy – 09 – D
Patent
C - Chemistry, Metallurgy
09
D
31/47, 400/5022
C09D 5/10 (2006.01) C08F 8/40 (2006.01) C09D 5/38 (2006.01) C09D 17/00 (2006.01)
Patent
CA 1255030
ABSTRACT TITLE: COATING COMPOSITION The invention provides an aqueous coating composition which comprises a film forming polymer and a particulate metallic pigment characterised in that the composition contains as corrosion inhibition agent for the pigment a phosphatic material containing at least one acidic hydroxyl group or a salt thereof linked to a phosphorus atom and which has been obtained by the co-reaction of (i) an addition polymer carrying a functional hydroxyl group, (ii) a monohydric alcohol or phenol and (iii) a compound containing in the molecule the grouping: Image or a compound equivalent in structure to such a grouping. Preferably, where the reactant (i) and/or (ii) contains a material having a terminal alkyl group containing more than 6 carbon atoms such a material provides less than 25% by weight of the combined weights of the reactants (i) and (ii), since we have found that the presence of such long chain terminal groups impairs the inter coat adhesion between a base coat of the composition of the invention and a subsequently applied translucent top coat.
511444
Ballantyne Donald G.
Ppg Industries Ohio Inc.
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