含フッ素アルコール-エチレンオキシド付加体の合成と性質

抄録

Polyoxyethylene fluoroethers, CF₃ (CF₂) _mCH₂O (C₂H₄O) _pH and H (CF₂CF₂) _n CH₂O (C₂H₄O) _pH (m=2, 6; n=2, 3, 4; p=3, 5, 10) were prepared by the addition of ethylene oxide (EO) to fluoroalcohols in the presence of a base catalyst and their physicochemical properties-cloud point, surface tension, foaming property, and emulsifying power-weremeasured. The effects of the number of EO moles added and the carbon chain length of starting alcohols onthe surface activities were clarified, and the following results were obtained.
1) Cloud points of aqueous solution of those adducts were found to be higher with an increase in the ni mber of oxyethylene units.
2) Aqueous surface tensions of those adducts decreased with increasing of the carbon chain length of starting alcohols. However, 5 moles EO adducts generally gave the lowest aqueous surface tension in each of the series other than H (CF₂CF₂) ₂CH₂O (C₂H₄O) _pH. (p=3, 5, 10).
3) With the exception of ethylene glycol solutions of CF₃ (CF₂) ₆CH₂O (C₂H₄O) _pH (p=0, 1, 3, 5, 10), the surface tensions of ethylene glycol solutions of those adducts decreased with increasing of the carbon chain length of starting alcohols and the number of oxyethylene units.
4) CF₃ (CF₂) ₆CH₂O (C₂H₄O) _pH (p=5, 10) and H (CF₂CF₂) ₄CH₂O (C₂H₄O) ₁₀H showed a good foaming property.
5) The adducts had strong emulsifying powers toward xylene but weak emulsifying powers toward liquid paraffin.