Polymers with crystallizable fluorocarbon side chains, their...

Details Polymers with crystallizable fluorocarbon side chains, their... Polymers with crystallizable fluorocarbon side chains, their...

C - Chemistry, Metallurgy

07

C

C07C 69/653 (2006.01) C08F 20/22 (2006.01) C08F 20/24 (2006.01) D06M 15/277 (2006.01)

Patent

CA 2202650

This invention relates to polymers having pendant side groups of the formula: - (CH2)m-(CF2)nF, wherein m is 10, and n is 10 and more in which the amount of the monomer containing the moiety -(CF2)10F constitutes about 50 % or more of the total percent of all the monomers. By adjusting the number of -CH2- groups to 10 and adjusting the distribution within the -(-CF2)mF groups, it has been discovered that the particular side group configuration forms crystalline regions that reduce mobility of the side chains and thereby improves the repellency of materials coated with the polymers of the invention.

L'invention se rapporte à des polymères présentant des groupes latéraux pendants de formule -(CH¿2?)¿m?-(CF¿2?)¿n?F dans laquelle m vaut 10 et n vaut au moins 10. Dans ces polymères, le monomère contenant la fraction -(CF¿2?)¿10?F constitue environ 50 % ou plus du pourcentage total de tous les monomères. Il a été découvert que, lorsque le nombre de groupes -CH¿2?- est maintenu à 10 et lorsque la distribution dans les groupes -(-CF¿2?)¿m?F est ajustée, la configuration particulière des groupes latéraux entraîne la formation de zones cristallines qui réduisent la mobilité des chaînes latérales et améliore ainsi l'imperméabilité des matériaux enduits des polymères selon l'invention.

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