国产情趣视频,这里有精品在线视频,成年人网站免费视频,日本色图欧美色图,国产精品日日夜夜,欧美专区在线观看,99久在线观看

Your Current Position:  PRODUCTS > Resin series > Penta Ester of Ploymerized Rosin

Pentaerythritol Ester of Polymerized Rosin

Pentaerythritol ester of polymerized rosin are made from polymerized rosin through esterification with pentaerythritol;have the character of large molecular weight, high softening point, used for adhesives tapes to enhance the holding power and cohesive force.