Method for producing polyalkylene arylates
AssigneeBASF SE
InventorsThomas Heitz, Martin Klatt
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Abstract
A continuous process for the preparation of polyalkylene arylates A) containing lubricants and nucleating agents, in which an aromatic dicarboxylic acid or esters or ester-forming derivatives thereof are esterified or transesterified with a molar excess of an aliphatic dihydroxy compound and the (trans)esterification product obtained is polycondensed, wherein when at least 80% of the desired viscosity number has been reached, lubricants B) and nucleating agents C) are added to the polymer melt and the melt is optionally post-condensed and then discharged, cooled and granulated.
Claims9
A continuous process for the preparation of polyalkylene arylates A) containing lubricants and nucleating agents, in which an aromatic dicarboxylic acid or an ester or ester-forming derivative thereof is esterified or transesterified in at least two temperature stages with a molar excess of an aliphatic dihydroxy compound and the (trans)esterification product obtained is polycondensed, wherein when at least 80% of the desired viscosity number has been reached, a lubricant B) and nucleating agent C) are added to the polymer melt and the melt is optionally post-condensed and then discharged, cooled and granulated.
Dependencies are inferred from the claim text.