- Manufacture of chloromethyl-substituted polyfluoroalkyl esters
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Compounds having the formula: STR1 wherein Rf is perfluorinated saturated aliphatic containing 3-20 carbons; R1 is optionally substituted alkyl, aryl, aralkyl or cycloalkyl; and n is a number from 1 to 4. Process for preparing compounds (I): STR2 The reaction can be carried out, e.g., by melting an iodine-substituted polyfluoroalkyl ester and contacting the molten ester with chlorine, or an iodine-substituted polyfluoroalkyl ester can be suspended or dissolved in a suitable liquid and reacted with chlorine. A suitable liquid is inert under the reaction conditions; e.g. alcohols or water should be avoided. Process of using compounds (I) to treat (a) textile materials so as to give them dry soil resistance and oil and water repellency, and (b) paper so as to make it repel water and oil.
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