Patent ID: 7049352

Claim:
Pigment-containing aqueous coating composition which provides a pigmented coating having a pigment volume concentration (PVC) in the range of from 15 to 35% and an elasticity value of at least 30%; wherein said aqueous coating composition comprises: a seeded multistage polymer latex(es) (A) blended with a non-film forming polymer latex(es) (B), the amount of (A) in the blend corresponding to 75 to 98 weight % of the multistage polymer(s) of (A) based on total weight of the polymers of (A) and (B), and the amount of (B) in the blend corresponding to 2 to 25 weight % of the polymer(s) of (B) based on the total weight of the polymers of (A) and (B); and wherein with regard to the seeded multistage polymer latex(es) (A): (a) the multistage polymer(s) thereof comprises 50 to 90 wt % of at least one soft polymer phase having a Tg ≦25° C. and 10 to 50 wt % of at least one hard polymer phase having a Tg ≧30° C.; (b) the multistage polymer latex(es) has been prepared in the presence of a seed polymer latex(es), the amount of said seed polymer latex(es) corresponding to 1 to 20 wt % of the seed polymer(s) of the latex(es) based on the weight of the multistage polymer(s); and (c) the seed polymer(s) having a Tg which is at least 10° C. lower than the Tg of said hard polymer phase(s) of the multistage polymer(s).