the invention provides a method of efficiently producing branched , cyclic glycerol - based polyols with a co - product as anti - biodegrading agent from inexpensive readily available glycerol monomer . the method involves polymerizing glycerol or glycerol with at least another monomer to multiple other monomers in the presence of particular amount of a strong base as the catalyst under a particular distillation environment . the polyol produced by the inventive method is beneficial of reducing scales in bayer liquid for aluminum production process and improving brightness of coated paper substrates without greening effect .