Solvent free aqueous polyurethane dispersions and adhesive films therefrom for stretch fabrics

A stretch article comprising:

• at least one adhesive film or tape of:
• a substantially solvent-free aqueous polyurethane dispersion of:
• (1) a prepolymer, which comprises:
• a) at least one polyether or polyester polyol, wherein said polyether or polyester polyol has a number average molecular weight of about 600 to about 3,500;
• b) a mixture of 4,4′-and 2,4′-methylene bis(phenyl isocyanate) (MDI) isomers, wherein the ratio of 4,4′-MDI to 2,4′-MDI isomers ranges from about 65:35 to about 35:65;
• and
• c) at least one dial compound comprising:
• hydroxy groups capable of reacting with the mixture of MDI isomers of component b) and 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 mixture of MDI isomers of component b);
• (2) at least one neutralizing agent to form an ionic salt with the at least one diol compound;
• and
• (3) at least one monofunctional dialkyl amine compound as a blocking agent for isocyanate groups;
• and a substrate to which said adhesive film or tape is applied, wherein the adhesive film or tape is applied to the substrate upon release from a release paper.