Patent ID: 7687649
Filing Date: 2010-03-30
Classification: C07C,C08G

Abstract:
1. A polyglycerol having a cyclic structure in low content, wherein: a ratio of [total polyglycerol (1) represented by the following general formula [1]] to [total polyglycerol (2) having a cyclic structure that contains at least one cyclic structure in a molecule], that is, [the total polyglycerol (1)]:[the total polyglycerol (2) having a cyclic structure] is 70% or more:30% or less (the total of both is 100% by weight) in terms of an intensity ratio determined by liquid chromatography/mass spectrometry; and an average calculated from a hydroxyl value of polymerization degree (repeating unit of a glycerol residue) p+2 of polyglycerol (1) and polymerization degree of polyglycerol (2) is 2 or more: (in the formula [1], “p” represents a repeating portion of a glycerol residue and is an integer of 0 or more, and a polyglycerol molecule has a polymerization degree of “p+2”).