Polymers of esters of acrylic acid with one or more of the following monomers in the chain:<br> <br><br><br>- chloromethyl vinyl ether,<br> <br><br><br>- chloroethyl vinyl ether,<br> <br><br><br>- chloromethylstyrene,<br> <br><br><br>- vinyl chloroacetate,<br> <br><br><br>- methacrylic acid,<br><br><br><br>- butenedioic acid monobutyl ester,<br><br><br><br>- butenedioic acid monocyclohexyl ester<br>containing by weight not more than 5 % of each monomer unit
Tariff preference