hongchang chemical s a low-vocs alcohol water-soluble pvp modified polyurethane resin and its preparation method and application was authorized by the state intellectual property office
a few days ago, guangdong hongchang chemical co., ltd. applied for the invention patent “a low-vocs alcohol water-soluble pvp modified polyurethane resin and its preparation method and application” authorized by the state intellectual property office, patent number: zl 202111565055.3. according to the invention, the company successfully developed the hc68 series alcohol water-soluble ink, which was…
