| abstract |
Spinning preparations containing a gliding agent with improved biodegradability are disclosed. The gliding agents are block copolyesters obtained from hydrophilic polyethylene glycols and hydrophobic diolene, chosen from the group of the polypropylene glycols, polytetrahydrofuranes, polycaprolactone diols, hydration products of castor acid esters, 1,2-alkane diols, alpha, omega-alkane diols and/or dimer diols as well as aliphatic dicarboxylic acids with 2 to 36 carbon atoms linking blocks A) and B), their anhydrides, their esters of lower alcohols with 1 to 8 carbon atoms and/or carboxylic acid diesters of lower alcohols with 1 to 8 carbon atoms. |