| 摘要 |
<p>Linear copolyesters containing a plurality of repeat units derived from difunctional compounds containing oxysulphonyl groups and a plurality of repeat units of the general formula: <IMAGE> in which: - R1, R2, R3 and R4, which are identical or different, denote alkyl, cycloalkyl or arylalkyl radicals, - A is a divalent hydrocarbon radical bonded to the vicinal silicon atom by a carbon-silicon bond, free from aliphatic unsaturation and capable of including a heteroatom taken from the group consisting of O, Si and N, - Z and Z1, which are identical or different, denote divalent functional groups <IMAGE> - n is a whole or fractional number between 5 and 200. These copolyesters find application in the form of dispersion or of aqueous solutions for the surface coating of polyester films.</p> |
