| 摘要 |
Methods for preparing vulcanizable retroreflective sheeting are provided. The method of making vulcanizable retroreflective sheeting, comprises providing a reaction mixture comprising at least one diisocyanate, at least one polyisocyanate, at least one polyol, at least one unsaturated polyol and at least one chain extension agent, coating the reaction mixture onto a carrier web that comprises retroreflective elements, curing the reaction mixture, and removing the carrier. |
