| abstract |
The present invention relates to an aqueous polyurethane dispersion and a process for preparing the same, an adhesive containing the same, and an adhesion article obtained by bonding with the adhesive. The aqueous polyurethane dispersion comprises a polyurethane having an anionic group dispersed therein, the polyurethane has a fusion enthalpy of 3J/g - 100J/g at 20°C-100°C of the first temperature rising curve measured with the DSC according to DIN 65467, a weight-average molecular weight of 31,000 - 95,000, and the aqueous polyurethane dispersion has an acid value of 0.5 mg KOH/g - 8.5 mg KOH/g. The adhesive comprising the aqueous polyurethane dispersion of the present invention has an excellent initial bonding force. |