aqueous polyurethanharzdispersion and aqueous adhesive

摘要

An aqueous urethane resin dispersion for bonding can be used in wet lamination and dry lamination and can be reactivated easily at a low temperature of about 50 to 70 DEG C after drying, and is also superior in coatability, adhesive strength, and heat resistance. The aqueous dispersion of a polyurethane resin is superior in contact adhesiveness immediately after lamination and also has good permeability and good coatability not only on bases having smooth surfaces such as plastics and metals, but also on porous bases such as fibers, papers, and buffed leathers; an aqueous adhesive using the aqueous dispersion; and an article to which it is applied. The aqueous polyurethane resin dispersion has at least one of a sulfonate group and a carboxylate group, wherein an average particle diameter of the polyurethane resin is 0.05 to 0.30 mu m and a surface tension of the aqueous dispersion (A) is 40 mN/m or less.