A method for preparing a shaped polyurethane foam article comprising: (a) providing a first composition comprising a combination of at least one polyol with a chain extender composition and a blowing agent; (b) providing a second composition, which is an isocyanate composition comprising at least one of: a diisocyanate; a diisocyanate capped glycol which is the reaction product of a polyol, a polyisocyanate, and a compound capable of salt-forming upon neutralization; and combinations thereof; (c) mixing said first composition and said second composition to form a reaction mixture into a heated mold; and (d) allowing the reaction mixture to form a polyurethane foam; wherein said blowing agent includes a polyurethaneurea aqueous dispersion which comprises: a polymer which is the reaction product of: at least one polyol selected from polyethers, polyesters, polycarbonates, and combinations thereof, wherein the polyol has a number average molecular weight of 600 to 4000; a polyisocyanate comprising at least one aromatic diisocyanate; a neutralizing agent and a diol compound comprising: (i) hydroxy groups capable of reacting with polyisocyanate, and (ii) at least one carboxylic acid group capable of forming a salt upon neutralization, wherein said at least one carboxylic acid group is incapable of reacting with the polyisocyanate; a chain extender selected from the group consisting of diamine chain extenders, water, and combinations thereof; and optionally including a blocking agent for isocyanate; and at least one surface active agent. (a) providing a first composition comprising a combination of at least one polyol with a chain extender composition and a blowing agent; (b) providing a second composition, which is an isocyanate composition comprising at least one of: a diisocyanate; a diisocyanate capped glycol which is the reaction product of a polyol, a polyisocyanate, and a compound capable of salt-forming upon neutralization; and combinations thereof; (c) mixing said first composition and said second composition to form a reaction mixture into a heated mold; and (d) allowing the reaction mixture to form a polyurethane foam; wherein said blowing agent includes a polyurethaneurea aqueous dispersion which comprises: a polymer which is the reaction product of: at least one polyol selected from polyethers, polyesters, polycarbonates, and combinations thereof, wherein the polyol has a number average molecular weight of 600 to 4000; a polyisocyanate comprising at least one aromatic diisocyanate; a neutralizing agent and a diol compound comprising: (i) hydroxy groups capable of reacting with polyisocyanate, and (ii) at least one carboxylic acid group capable of forming a salt upon neutralization, wherein said at least one carboxylic acid group is incapable of reacting with the polyisocyanate; a chain extender selected from the group consisting of diamine chain extenders, water, and combinations thereof; and optionally including a blocking agent for isocyanate; and at least one surface active agent. at least one polyol selected from polyethers, polyesters, polycarbonates, and combinations thereof, wherein the polyol has a number average molecular weight of 600 to 4000; a polyisocyanate comprising at least one aromatic diisocyanate; a neutralizing agent and a diol compound comprising: (i) hydroxy groups capable of reacting with polyisocyanate, and (ii) at least one carboxylic acid group capable of forming a salt upon neutralization, wherein said at least one carboxylic acid group is incapable of reacting with the polyisocyanate; a chain extender selected from the group consisting of diamine chain extenders, water, and combinations thereof; and optionally including a blocking agent for isocyanate; and at least one surface active agent.