| 摘要 |
<p>The preparation of a condensation polymer of a quality for moulding or for fibres which has copolymerised within it a total of from 1.0 to approximately 5,000 ppm of at least one methyne residue which has one or more methyne units defined as "the group =C=C= combined with a conjugated aromatic system", the said residue absorbing in the range from approximately 350 nm to approximately 650 nm, which cannot be extracted from the said polymer and is stable under the conditions of treatment of the polymer, is described. The residues preferably have molecular weights of approximately 200 to approximately 600, although greater and smaller molecular weights may also be used, and are derived from (monomer) reagents which have one or more groups such as hydroxyl, carboxyl, carboxylic ester, acid halide, amine and the like which condense during condensation or polycondensation to enter the polymer chain residue.</p> |
