| abstract |
An aqueous dispersion of an anionic polyurethane, said polyurethane comprising a chain extended, aliphatic diisocyanatae containing, prepolymer; said prepolymer including carboxy groups neutralized with a tertiary amine composition comprising dimethylaminoethanol, said prepolymer being chain extended with a diamine comprising hydrazine. The invention also includes a film formed from the dispersion and a floor covering coated with such film. The film may be crosslinked with an agent such as melamine-formaldehyde resin. |