Arkema France

Patrice Defer

Clement Bellini

Serge Tretjak

Reinhard Linemann

Yves Cabon

Andre Levray

Benoit Riflade

Sandra Maget

Clément Bellini

André Levray

The present invention relates to a process for the continuous synthesis of heavy alkyl acrylates by a transesterification reaction using hydrozincite as a heterogeneous catalyst.

Process for the continuous preparation of heavy alkyl acrylates

The present invention relates to the use of a stabilizing composition comprising at least one N-oxyl compound and at least one polymerization inhibitor other than an N-oxyl compound, for inhibiting transesterification catalyst degradation in a process for the synthesis of aminoalkyl (meth)acrylates. Preferably, the transesterification catalyst is a titanium organometallic compound and the stabilising composition comprises at least one N-oxyl derivative and at least one polymerization inhibitor chosen from phenolic compounds and phenothiazine compounds in a weight ratio of between 1 and 10, preferably between 4 and 10, limits inclusive.

Aminoalkyl (meth)acrylate stabilisation

A process for the synthesis of acrylic acid oligomer represented by formula (I):  wherein the process comprises the step of heating acrylic acid at a temperature from 50&#xb0; C. to 200&#xb0; C. in the presence of a catalyst, water and at least one polymerization inhibitor. Formula (I) where n=0 is acrylic acid, the precursor for preparing the acrylic acid oligomer.

Process for the synthesis of acrylic acid oligomers

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Courcelles Chaussy, France

Patrice Defer