公开(公告)号：US07495063B2

公开(公告)日：2009-02-24

申请号：US11346910

申请日：2006-02-03

申请人： Robert Kirk Thompson ,  Pierre Thomas Varineau ,  Bruce Armin Barner ,  David Alan Wilson

发明人： Robert Kirk Thompson ,  Pierre Thomas Varineau ,  Bruce Armin Barner ,  David Alan Wilson

IPC分类号： C08G64/00 ,  C08F6/00

CPC分类号： C08G65/30 ,  C08G65/26 ,  C08G65/2696

摘要： Polyalkylene glycol compositions having reduced low molecular weight oligomers are disclosed. Some compositions, particularly polyethylene glycol compositions, have a number average molecular weight range from about 3000 to about 10,000 g/mol and have a total oligomer concentration of less than about 400 ppm of all oligomers having a molecular weight of less than or equal to 812 g/mol and a total oligomer concentration of less than about 50 ppm of all oligomers having a molecular weight of less than or equal to 240 g/mol. Other polyalkylene compositions, particularly polyethylene glycol compositions, are characterized by a total oligomer concentration of less than about 90 ppm of all oligomers having a molecular weight less than or equal to 460 g/mol and are obtained without further processing to remove oligomers having a molecular weight of less than about 460 g/mol. Methods for making such compositions are also disclosed.

摘要翻译： 公开了具有降低的低分子量低聚物的聚亚烷基二醇组合物。 一些组合物，特别是聚乙二醇组合物的数均分子量范围为约3000至约10,000g / mol，并且具有小于或等于812分子量的所有低聚物的总低聚物浓度小于约400ppm g / mol，低分子量小于或等于240g / mol的低聚物的总低聚物浓度小于约50ppm。 其它聚亚烷基组合物，特别是聚乙二醇组合物的特征在于，总低聚物浓度小于约90ppm的所有分子量小于或等于460g / mol的低聚物，并且不经进一步处理得到以除去具有分子量 重量小于约460g / mol。 还公开了制备这种组合物的方法。