Solvay (societe Anonyme)

Solvay Sa

Solvay Polyolefins Europe-belgium (societe Anonyme)

Solvay Polyolefins Europe-belgium

Eric Fassiau

Eric Vandevijver

Claude Vogels

Bernard Vandenhende

Denis Geets

Pascal Lefevre

Jean-Christophe Lepers

Henri Wautier

Marie-Paule Collard

Jean-Raphael Caille

Murielle Manin

Michaël Lannoy

Process for the purification of a vinyl chloride polymer (PVC) comprising at least one compound of a heavy metal, according to which: (a) the PVC is dissolved in a water-miscible polar organic solvent; (b) an aqueous solution comprising a reagent, which is either a base capable of reacting with the compound of the heavy metal (R1) or a dispersing agent capable of stabilizing the said compound (R2), is added to the organic solution, the water being introduced in an amount (Q) such that it brings about the formation of a two-phase medium, the continuous phase of which is the organic phase; (c) the two-phase medium is subjected to stirring for a time sufficient for the reagent to be able to interact with (exert its effect on) the compound of the heavy metal; (d) the precipitation of the PVC out of this two-phase medium is brought about.

Process for the purification from heavy metals of vinyl chloride polymers

Method for recovering a polymer from a liquid medium () substantially containing the polymer and a solvent for the latter, wherein:

Method for recovering a polymer from a liquid medium

Process for recovering at least one polymer in solution in a solvent by precipitation by means of a non-solvent introduced gradually into the solution to form the precipitation medium, whereby:

Method for obtaining a polymer in a solution

Process for recovering at least one polymer in solution in a solvent by precipitation by means of a non-solvent fluid, whereby the precipitation takes place in a precipitation medium comprising two dispersants of which one [dispersant(I)] has a greater affinity for the non-solvent and the other [dispersant (II)] has a greater affinity for the solvent.

Method for recovering a polymer in solution

A process for the purification of a vinyl chloride polymer containing a compound of a heavy metal by:

Process for the purification of vinyl chloride polymers (PVC) from heavy metals

Process for the solvent treatment of a plastic, by dissolving the plastic with a solvent and with at least one phase separation agent compatible with the solvent to form a solution, precipitating the plastic by contacting the solution with at least one non-solvent so as to obtain a solvent/non solvent mixture containing precipitated plastic particles, and substantially eliminating the solvent from the mixture and recovering solid plastic particles. After dissolution but before substantially eliminating the solvent a stripping takes place during which at least a substantial portion of the PSA is removed from the solution or from the mixture using a stripping composition.

Process for the solvent treatment of a plastic

Compositions comprising one or more olefin polymers functionalized by at least one functionalization agent chosen from carboxylic acids, their esters, their anhydrides and their metal salts and one or more stabilizing agents comprising one or more sterically hindered phenol groups and at most one ester functional group. Process for their preparation and use of these compositions for compatibilizing olefin polymers with polymers, fillers and metal substrates which are incompatible with olefin polymers.

Polyolefin compositions, method for the production and use thereof

Continous process for grafting a polyolefin within a melt including a polyolefin of linear olefin containing from 2 to 8 carbon atoms, a graftable functional monomer and a radical-generator, in an extruder including at its exit a compression zone followed by a discharge zone, in which at least one antioxidant additive is introduced into the melt not later than before the latter enters the compression zone of the extruder. Stabilized grafted polyolefin obtained by means of this process.

Continuous process for grafting a polyolefin, the grafted polyolefins

Continuous process for grafting a polyolefin within a melt including a polyolefin of linear olefin containing from 2 to 8 carbon atoms, a graftable functional monomer and a radical-generator, in an extruder including at its exit a compression zone followed by a discharge zone, in which at least one antioxidant additive is introduced into the melt not later than before the latter enters the compression zone of the extruder. Stabilized grafted polyolefin obtained by means of this process.

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Eric Fassiau