| 摘要 |
1. Process for the manufacture of delustered linear polyesters by reaction of a) terephthalic acid or the dimethyl ester thereof, b) a glycol, c) a compound forming a phosphorus-containing chain member, which amounts to up to 15 weight %, relative to the finished polyester, and which is selected from the group of phosphonic acid and its ester, phosphinic acid and its ester, ethylene-bis-methylphosphinic acid or 2-carboxyethylmethylphosphinic acid, if the phosphorus atom is to be built into the polymer chain, or from the phosphine oxides if the phosphorus atom is to be built into the side chain, and d) oxygen compounds of phosphorus, characterized in that after the ester interchange or esterification step or during the polycondensation reaction phosphoric acid triesters as oxygen compounds of phosphorus for stabilization to light are added, which contain 1 or 2 alkyl groups having from 1 to 4 carbon atoms and simultaneously 2 or 1 alkylene glycol or polyalkyleneglycol groups, the alkylene groups of which having from 2 to 4 carbon atoms, and delustering the polyester with TiO2 . |
