Arkema Inc.

Atofina

Stefano Finocchiaro

Ramin Amin-Sanayei

Kurt Arthur Wood

Leo Mario Saija

Daniele Becchi

Mario Lugli

Lawrence Kyran Wempe

Delphine Tillier

The process comprises the following phases: formation of a pre-emulsion of monomers in water; transfer into the polymerisation reactor with stirring, of (1) reaction stock consisting of a water solution of a surfactant, in an amount by weight relative to the weight of final polymer dispersion of 1&#x2013;15%; (2) a portion of the pre-emulsion prepared in the previous phase, in an amount of 1%&#x2013;10% by weight of the initial pre-emulsion; phase C.1: initiation of the polymerisation ; phase C.2: polymerisation of the monomer mixture at 30&#x2013;90&#xb0; C., by gradually adding into the reactor, separately, the initiator solution and the remaining portion of the pre-emulsion with an added salt, which is soluble in water at 25&#xb0; C. to at least 1% by weight, in an amount so as to have a salt concentration in the added pre-emulsion of 0.02&#x2013;0.25% by weight; phase C.3: scrubbing of the residual monomers.

Process for obtaining aqueous polymer dispersions

Processes for the preparation of adherent polyvinylidene fluoride, hexafluoropropylene coatings on objects and for the direct production of open celled foams from a polymer latex without a need for any blowing agent.

Foams and coatings

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Viadana, Italy

Stefano Finocchiaro