<研究論文>防汚機能をもつ含フッ素ポリウレタンコーティング剤の調製

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[Abstract]With the aim of preparing the novel antifouling paint, polyurethanes including fluoro-substituted methyl- or methylene groups in the main chain were obtained from a typical surface polyaddition of fluoro-substituted bisphenol A and various diols to diisocyanates using tetrabutylammonium bromide (TBAB) as a phase transfer catalyst . Fluoro-substituted compounds used were 2,2-bis(4-hydroxyphenyl) hexafluoropropane (BHPHFP) , 2,2,3,3-tetrafuluoro-1,4-butanediol(TFBDO) , 2,2,3,3,4,4- hexafluoro-1,5-pentanediol (HFPDO) and 2,2,3,3,4,4,5,5,6,6,7,7- dodecafluoro-1,8-octanediol (DFODO), whereas diisocyanates used were phenylene-1,4- diisocyanate (1,4-PDI), tolylene-2,4-diisocyanate (2,4-TDI) and tolylene -2,6-diisocyanate (2,6-TDI). Polyaddition with a molar ratio of 0.5 : 0.5 for the diol in NaOH aqueous solution and diisocyanate in carbon tetrachloride gave the twelve kinds of fluorinated polyurethanes . From the solubility test to some organic solvents, polyurethanes consisting of aliphatic diol dissolve in dimethyl sulfoxide, dimethyl formamide and tetrahydrofuran. The measurements of contact angle to water and colza oil confirmed that the introduction of fluorine atoms into polyurethane results in preventing from the air pollution.