The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 23, 1987
Filed:
Jun. 12, 1986
Andrew Frangou, Windlesham, GB;
Imperial Chemical Industries PLC, London, GB;
Abstract
The invention provides an aqueous coating composition which comprises a film forming polymer and a particulate metallic pigment characterized 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: ##STR1## 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.