Patent ID: 8435639

Claim:
An aqueous coating composition for weathered elastomeric substrates comprising (i) one or more emulsion copolymer having a glass transition temperature (Tg) of from −25° C. to 20° C., a weight average molecular weight of from 50,000 to 150,000, and a weight average particle size of from 100 to 500 nm, the emulsion copolymer prepared by copolymerizing a monomer mixture of (a) 20 wt. % or more of one or more hydrophobic monomer chosen from C 6 to C 24 alkyl (meth)acrylates, (b) up to 20 wt. % of one or more vinyl aromatic monomer, wherein the weight of monomers (a) and (b) together constitute at least 25 wt. % or more, of the total weight of the monomer mixture, (c) from 0.5 wt. % to 75 wt. %, of one or more vinyl comonomer, and (d) 0.2 to 5 wt. % of one or more ethylenically unsaturated acid functional monomer, all monomer weight % s based on the total weight of monomers in the monomer mixture used to make the emulsion copolymer, (ii) one or more aminosilane, and (iii) the combination of one or more pigment, extender or filler with one or more hydrophilic dispersant, wherein the composition is substantially zinc free.