99294 ⎘
Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule; Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds derived from polycarboxylic acids and polyhydroxy compounds; Polyesters derived from ester-forming derivatives of polycarboxylic acids or of polyhydroxy compounds, other than from esters thereof Polyamides; Polynitriles