| abstract |
An aqueous polyurethane structure and material for cell therapy and non-allergenic stem cells, comprising a laminated waterproof and moisture-permeable sheet and a functional adhesive layer; the waterproof and moisture-permeable sheet is made of an aqueous polyurethane material and includes mutual polymerization Hard segment: diisocyanate, chain extender, and soft segment: polyol, chain extender, the chain extender contains ethylenediamine or p-phenylenediamine; the polyol contains polyether polyol or polyester polyol Alcohol, the chain extender contains 2,2-dimethylolpropionic acid, and uses organic zinc or organic bismuth catalyst to catalyze the reaction; the present invention has no sensitization to cells or stem cells through the selection of materials and the control of process parameters; Excellent biocompatibility, can be applied to the development of cell-assisted therapy and related products. |