Arkema France

Reinhard Linemann

Alain F Riondel

Guillaume Le

Coralie Graire

Andre Levray

Serge Hub

Marc Esch

Serge Tretjak

Isabelle Betremieux

Bruno D'Herbecourt

Jean-Yves Loze

Benoit Riflade

Alain Boone

Georges Martino-Gauchi

Patrice Defer

André Levray

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

The present invention relates to the use of a polymer from the polymerization of 2-octyl acrylate of renewable origin and optionally at least one other monomer, as a binding agent in or for the production of a coating composition.

Use of 2-octyl acrylate polymer as a binding agent in a coating composition

The invention relates to a process for continuously producing 2-octyl acrylate by reacting acrylic acid and 2-octanol in the presence of a sulfonic acid esterification catalyst and at least one polymerization inhibitor. The water formed by the esterification reaction is entrained by distillation in a column surmounting the reactor in the form of a heteroazeotropic mixture with the 2-octanol which is then subjected, after condensation, to separation in a decanter so as to give an upper organic phase and a lower aqueous phase. The reaction mixture containing the reaction product and residual by-products are purified by separation means in order to obtain: (1) pure 2-octyl acrylate and (2) unreacted 2-octanol and acrylic acid compounds that will be recycled along with the catalyst.

Method for producing 2-octyl acrylate by direct esterification

The invention relates to the production of 2-octylacrylate of high purity and in good yield using ethyl titanate in solution in 2-octanol or 2-octyl titanate as a transesterification catalyst.

Method for the production of 2-octyl acrylate by means of transesterification

Use, as adhesion promoter intended for application to the surface of a substrate S1 made of thermoplastic elastomer polymer TPE which comprises a chain formed of an alteration of hard segments and of soft segments, for the purpose of the adhesive assembly of the said substrate S1 with another substrate S2, of at least one solvent of the hard segments and/or of the soft segments of the said thermoplastic elastomer polymer TPE.

Adhesion promoter intended for application to a thermoplastic elastomer polymer substrate and corresponding processes for surface treatment and adhesive assembly

The present invention relates to a process for the preparation of dimethylketene (DMK) and then of polydimethylketene (PDMK) by polymerization of DMK. More specifically, the DMK is obtained by pyrolysis by isobutyric anhydride (IBAN), the latter decomposing under the effect of heat (pyrolysis) to give isobutyric acid (IBA) and DMK. One mole of pyrolyzed IBAN gives one mole of IBA and one mole of DMK.

Method of preparing dimethylcetene and, subsequently, polydimethylcetene from isobutyric anhydride

The invention concerns a cationic catalyst system comprising an initiator (I), a catalyst (K) and a cocatalyst (CoK). The cocatalyst (CoK) is an agent releasing the active polymerizing center of its counter anion generated by the reaction between the catalyst (K) and the initiator (I). Said cocatalyst is characterized by the existence of a double bond electron-depleted by an electroattractive group. It is selected, for example, from the group consisting of the following complexing agents including o-chloranyl (3,4,5,6-tetrachloro-1,2-benzoquinone), p-chloranyl (2,3,5,6-tetrachloro-1,4-benzoquinone), nitrobenzene, trinitrobenzene, or tetracyanoethylene.

Growing community of inventors

Saarbrucken, Germany

Reinhard Linemann