The present invention relates to an aqueous
coating composition comprising: - an aqueous latex of a
copolymer [
copolymer (A)] consisting essentially of repeating units derived from: (i) vinylidene
chloride (VDC), (ii)
vinyl chloride (VC), (iii) one or more than one
alkyl (
meth)acrylates [
monomer (MA)] having from 1 to 12 carbon atoms in the
alkyl group and (iv ) one or more than one aliphatic α-β-unsaturated
carboxylic acid [
monomer (AA)], relative to the total weight of the
copolymer, the proportion of recurring units derived from
monomer (AA) is at least 1.0 % by weight, wherein: (A) said copolymer (A) is stabilized to dehydrochlorination in such a way that after heat treatment at about 120° C. for 2 hours, relative to the total weight of the copolymer (A), the The total
chloride content of the
solid residue of the aqueous latex is less than 1000 ppm; (B) said copolymer (A) does not undergo any significant
crystallization when heated in such a way that (j) it The ratio of the
crystallinity index (CI) after a heat treatment of 48 hours of heating to (jj) its
crystallinity index before such heat treatment (CI 热处理之后 / CI 热处理之前 ) is less than 1.15; and - at least one anticorrosion
pigment [
pigment (P)] comprising an aluminum salt of (poly)
phosphoric acid modified with an
alkaline earth metal oxide; - at least one
nonionic surfactant [surfactant (NS)]; and - at least one
inorganic filler different from the
pigment (P) [filler (I)] in an amount such that when measured relative to the dry
coating composition, comprises from 20% vol. to 40% Total pigment
volume concentration (PVC) of vol. including pigment (P) and filler (I).