Bright waterborne polyurethane and production method thereof

The invention relates to the technical field of production of polyurethane, and particularly discloses bright waterborne polyurethane. The bright waterborne polyurethane comprises a component A and acomponent B, wherein the component A comprises the following components in parts by weight: 70-80 parts of polycarbonate diol, 10-20 parts of polyoxypropylene triol, 30-40 parts of isophorone diisocyanate, 5-10 parts of dimethylolpropionic acid, 5-10 parts of 1,2-propanediol, 0.2-0.8 part of a catalyst, 5-10 parts of triethylamine and 200-250 parts of deionized water; and the component B comprisesthe following components in parts by weight: 70-80 parts of polycarbonate diol, 10-20 parts of polyoxypropylene triol, 20-30 parts of isophorone diisocyanate, 5-10 parts of dimethylolpropionic acid,0.2-0.8 part of a catalyst, 0.3-0.7 part of ethylenediamine, 5-10 parts of triethylamine and 180-200 parts of deionized water. According to the bright waterborne polyurethane, the defects of the priorart are overcome, use of toxic organic solvents is reduced, the situation that the toxic organic solvents volatilize to cause environmental pollution is avoided, and meanwhile, the finished product polyurethane is high in glossiness after forming a film, feels soft, and is good in color fastness to water.