Oil- and water-repellent copolymers.

摘要

Oil- and water- repellent solid fluoropolymers are disclosed, comprising by weight:
<UnorderedLists id="ula01" listStyle="none"><ListItem>(a) 40-75% polymer chain units derived from a mixture of perfluoroalkvlethvlacrvlate monomers of formula
<Chemistry id="chema01" num="0001"><Image id="ia01" he="4" wi="58" file="IMGA0001.TIF" imgContent="chem" imgFormat="TIFF" inline="no" /></Chemistry>the monomer mixture consisting essentially of:
<UnorderedLists id="ula02" listStyle="none"><ListItem>(1) 0-10% monomer wherein k is 4 or less;</ListItem><ListItem>(2) 45-75% monomer wherein k is 6;</ListItem><ListItem>(3) 20-40% monomer wherein k is 8;</ListItem><ListItem>(4) 1-20% monomer wherein k is 10; and</ListItem><ListItem>(5) 0-5% monomer wherein k is 12;</ListItem></UnorderedLists></ListItem><ListItem>(b) 10-35% polymer chain units derived from vinylidene chloride; and</ListItem><ListItem>(c) 10-25% polymer chain units derived from an alkyl acrylate or alkyl methacrylate having an alkyl chain length of 2-18 carbons.</ListItem></UnorderedLists>