ALEXANDRIA, Va., June 2 -- United States Patent no. 12,644,225, issued on June 2, was assigned to DIC Corp. (Tokyo).
"Synthetic leather" was invented by Ya-Yi Tseng (Takaishi, Japan) and Ryo Maeda (Takaishi, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention provides a synthetic leather including at least a substrate (i), an adhesive layer (ii), and a skin layer (iii), in which the adhesive layer (ii) and the skin layer (iii) are formed from respective specific urethane resin compositions. The adhesive layer (ii) is formed from a urethane resin composition including an anionic urethane resin (X) and water (Y). The skin layer (iii) is formed from a urethane resin composition including ...