| 摘要 |
<p>Substantially amorphous polyesters containing ionic moieties are useful to uniformly disperse particulate pigments in dipersions, image-forming compositions, e.g. lithographic compositions. Such polyesters reduce pigment agglomerations and improve dispersion stability in such dispersions and compositions. The ionic moieties include groups of the formula:$(6,)$or$(6,)$wherein: Y is a divalent radical; Y' is an alkyl radical or a monovalent aromatic radical and M+ is a monovalent cation.</p> |
