HYDROGENATED POLYMERS, RESIN COMPOSITION, AND PROCESS FOR PRODUCING SUBSTRATE FOR INFORMATION-RECORDING MEDIUM
申请人:NIPPON ZEON CO., LTD.
公开号:EP1193274A1
公开(公告)日:2002-04-03
A hydrogenated product of an aromatic vinyl polymer, wherein the hydrogenation rate of the aromatic rings thereof is at least 97%, a ratio (Mw/Mn) of the weight average molecular weight (Mw) to the number average molecular weight (Mn) is at most 2.0, the weight average molecular weight (Mw) is 100,000 to 300,000, and the content of a component having a molecular weight (M) of at most 10,000 is at most 2% by weight based on the total weight of the polymer; a hydrogenated product of an aromatic vinyl polymer, wherein the content of foreign matter having a particle diameter of at least 0.5 µm in the hydrogenated polymer is at most 3.0 x 104 particles/g; and a substrate for information recording media obtained by molding a resin material containing a hydrogenated product of an aromatic vinyl polymer, wherein the hydrogenation rate of the aromatic rings thereof is at least 97%, a ratio (Mw/Mn) of the weight average molecular weight (Mw) to the number average molecular weight (Mn) is at most 2.0, and the weight average molecular weight (Mw) is 100,000 to 300,000, and production process thereof.
一种芳香族乙烯基聚合物的氢化产品,其中芳香环的氢化率至少为 97%,重量平均分子量(Mw)与数量平均分子量(Mn)之比(Mw/Mn)最多为 2.0,重量平均分子量(Mw)为 100,000 至 300,000,分子量(M)至多为 10,000 的组分的含量至多为聚合物总重量的 2% (按重量计);芳香族乙烯基聚合物的氢化产物,其中在氢化聚合物中颗粒直径至少为 0.5 µm 的异物含量最多为 3.0 x 104 个颗粒/克;以及通过模塑含有芳香族乙烯基聚合物氢化产物的树脂材料而获得的信息记录介质基底,其中芳香环的氢化率至少为 97%,重量平均分子量(Mw/Mn)与数量平均分子量(Mn)之比(Mw/Mn)最多为 2.0,重量平均分子量(Mw)为 100,000 至 300,000 及其生产工艺。