A New Process for Preparation of Polyether Polyols by Catalytic Starch Liquefaction

作者：Liu Yang; Guo Zhiqiang; Zhang Long^*

来源：Asian Journal of Chemistry, 2014, 26(4): 1221-1224.

DOI：10.14233/ajchem.2014.16356

• Starch liquefaction
• Polyether polyols
• New process
• Foam materials

This paper reports a new process for the preparation of polyether polyols, with starch as raw material, the mixed polyol as the liquefying agent and methane sulfonic acid as the catalyst. The effect of the ratio of reactants, reaction temperature, reaction time and amount of catalyst on liquefaction process is determined by single factor experiments. The optimal preparation conditions was determined as follows: mass ratio of starch to liquefaction solvent is 1: 6, the amount of methane sulfonic acid is 3 % of the mass of liquefying agent, mass ratio of the liquefier PEG200 to glycerol is 7: 3, liquefaction time is 0.5 h, liquefaction temperature is 150 C, under this condition, conversion of starch reached to 98.2 %. NMR analysis of the liquefied product demonstrated that it is the polyether polyol with the hydroxyl value of 200.4 mg KOH/g, the viscosity of 725 mpa s. The polyether polyol product was successfully employed as the raw material for the preparation of the PU and PF foams. The properties of the foam were in line with the national standards (GB/T 6343-2009 and GB/T 8813-2008).

• 出版日期2014-2
• 单位长春工业大学