Hoechst Aktiengesellschaft

Clariant Corporation

Invista North America S.a.r.l.

Invista Textiles Limited

Josef Wiedemann

Gerhard Pfahler

Karl Gaa

Uwe Bayer

Gunther Nowy

Georg Schmailzl

Eva-Maria Leuschner

Matthias Z Ah

Thomas Stahrfeldt

Karsten Fritsch

Stephan Kretschmer

Eva-Marie Leuschner

The present application relates to novel polyester-ether compositions and their use as oxygen scavenging materials in polyester resins.

Polyester-ether resin blends

The present invention relates to novel stabilizers of the formula (I) ##STR1## in which the substituents have the meaning defined in the description. These novel stabilizers are particularly suitable for stabilizing organic material, such as plastics, oils, paints and coatings, against degradation by light, radiation, heat and oxygen.

Stabilizers based on 1-aza-2,2,6,6 tetramethybicyclo [3.1.0]hexane

Polyalkylpiperidine compounds of the formula I ##STR1## in which Y is the group ##STR2## are very effective stabilizers for organic materials.

Polyalkylpiperidine compounds

By dividing the known condensation of acetoacetic acid diol esters with phenols into two process steps, a reduction in the cost of the entire process can be achieved. Methyl acetoacetate is first condensed with a phenol and the methyl 3,3-bis(4-hydroxyalkylphenyl)butanoate formed is reacted with the desired diol in the presence of a transesterification catalyst. In this way only one acetoacetic ester is necessary for various final products. The final products are useful stabilizers for plastics, in particular polyolefins.

Process for the preparation a bis(3,3-bis(4-hydroxyalkylphenyl)butanoic

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Zusmarshausen, Germany

Josef Wiedemann