Hangzhou Sunflower Technology Development Co.,Ltd.(STD) was established with the leadership of Professor class senior engineer Wu Jiaxiang, who is also one of the most famous of specialist and the creators of PVP in China, and it has been approved as a high-tech enterprise by Zhejiang provincial government. The company has 26 years of experiences of technical innovation, project development and marketing, has mastered several dozen special techniques about fine chemicals, the most outstanding of...