Building exterior wall-coating emulsion compositions and building exterior walls

A building exterior wall having a coating thereon, the coating is formed from an emulsion composition comprising in admixture,

• a graft copolymerized emulsion obtained by adding to (1) an oil-in-water type emulsion containing at least one organopolysiloxane having the general formula (I):
• wherein R1, R2 and R3 each are a monovalent hydrocarbon group or monovalent halogenated hydrocarbon group having 1 to 20 carbon atoms, Y is an organic group containing a radical reactive group or SH group, X is hydrogen, a monovalent lower alkyl group or a group of the formula:
• R1R2R4Si wherein R4 is R1 or Y, and R1, R2 and Y are as defined above, m is an integer of 1 to 10,000, and n is an integer of at least 1, (2) a monomer or monomeric mixture containing at least 70% by weight of at least one monomer selected from acrylic and methacrylic monomers having the general formula (II):
• wherein R5 is hydrogen or methyl, and R6 is an alkyl or alkoxy-substituted alkyl group having 1 to 18 carbon atoms, so that a weight ratio of the organopolysiloxane of component (1) and the monomer or monomeric mixture of component (2) is 5:95 to 95:5, and effecting emulsion graft polymerization of component (2) to the organopolysiloxane, and
• a silicone resin-containing emulsion obtained by mixing a silicone resin having the average compositional formula (i):
• R7aR8bSi(OH)p(OX)qO(4-a-b-p-q)/2 (i)
• wherein R7 is an unsubstituted monovalent hydrocarbon group of 1 to 10 carbon atoms, R8 is a substituted monovalent hydrocarbon group of 1 to 10 carbon atoms, X is a monovalent hydrocarbon group of 1 to 6 carbon atoms, a, b, p and q are positive numbers satisfying the range:
• 0.50≦a≦1.80, 0≦b≦1.00, 0<p≦1.50, 0≦q≦0.50, 0.50≦a+b≦1.80, 0<p+q≦1.50, and 0.50<a+b+p+q≦2.0, with a radical polymerizable vinyl monomer and effecting emulsion polymerization.