Solvay (societe Anonyme)

Solvay Sa

Solvay & Cie (societe Anonyme)

Addcomp Holland Bv

Solvay & Cie

Solvay Polyolefins Europe-belgium (societe Anonyme)

Ktanton Ltd.

Solvay & Cie (societe)

Henri Wautier

Luc Lerot

Fernand Gauthy

Dino Manfredi

Martine Kaszacs

Philippe Dubois

Robert Jerome

Danny Van Hoyweghen

Franz Legrand

Eric Vandevijver

Andre Collin

Eric Fassiau

Dominique Grandjean

Zdenek Hruska

Ivan Claeys

Marie-Paule Collard

Philippe Lecomte

Lucienne Detournay

Samuel J Wajc

Jean-Pierre Latere

Process for manufacturing a polymer by polycondensation of a hydroxy acid, said polymer comprising at least 80% by weight of units that correspond to the hydroxy acid, according to which at least one polyfunctional reactant capable of giving rise to the formation of a three-dimensional polymer network is mixed with the hydroxy acid, and according to which the mixture is subjected to temperature and pressure conditions and for a duration which are all suitable for giving rise to the formation of the network. Poly(hydroxy acid) (PHA) obtainable by such a process.

Branched poly (hydroxy acid) and production process thereof

Process for the synthesis of a cyclic diester of an alpha-hydroxyacid, comprising the following steps:

Process for the production of cyclic diesters of alpha-hydroxyacids

Polymer compositions with adhesive properties comprising:

Polymeric compositions with adhesive properties

Aqueous emulsion comprising a functionalized polyolefin and carbon nanotubes

Process for modifying a polyolefin grafted with acid or anhydride groups, by at least partial neutralization of these groups with at least one neutralizing agent comprising an organic salt (1) that releases an organic acid (I) during the neutralization, according to which the organic acid (I) derived from the neutralization of the grafted polyolefin is reacted with at least one inorganic salt (2). Modified polyolefin (that can be) obtained by the process described above. Polymeric composition containing (A) at least one polymer, and (B) at least one modified polyolefin (that can be) obtained by the process above. Article comprising the modified polyolefin or the composition described above.

Method for modifying graft polyolefins, compositions and articles comprising polyolefins modified thus

The invention concerns thermoplastic aliphatic polyester compositions characterized by a melt flow index (RMFI) ranging between 1.1 and 2.5. The invention also concerns a method for preparing said compositions which are used for making films, foams, flasks or thermoformed products. The resulting films obtained from said compositions are used for making litter bags, films for agricultural use, packaging films, shrouds, diaper drawers and adhesive films.

Thermoplastic aliphatic polyester compositions, preparation method and uses thereof

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

Unsubstituted oxepane-diones useful as monomers for the production of polymers, process for the synthesis thereof by oxidation of unsubstituted cyclohexanediones, process for the preparation of polyesterketone polymers by polymerization of cyclic esterketones and polyesterketone polymers so obtained.

Cyclic esterketone compounds, processes for the synthesis thereof and process for the preparation of poly (esterketone) polymers

Flexible composition based on vinyl chloride polymer, use of said

Poly-.epsilon.-caprolactones produced by continuous melt polymerization of .epsilon.-caprolactone with the use of aluminium alkoxides are stabilized for storage by incorporation of an effective quantity of silicon derivative such as, for example, a silicon oxide, an inorganic silicate or a silicon alkoxide, preference being given to silicon alkoxides. This process has the effect of greatly limiting the gradual reduction in the inherent viscosity of the poly-.epsilon.-caprolactones in the course of time. In accordance with a preferred embodiment the incorporation of the silicon derivative is preceded by the incorporation of an effective quantity of water, and this further improves the storage stability of the poly-.epsilon.-caprolactones produced with the use of aluminium alkoxides.

Process for the storage stabilization of poly-.epsilon.-caprolactones

Poly-.epsilon.-caprolactones are produced by continuous polymerization of .epsilon.-caprolactone as a melt in an extruder (reactive extrusion) with the use, as polymerization initiator, of aluminium trialkoxides in which at least one alkoxy radical includes at least one other oxygen atom besides the oxygen atom constituting the aluminoxane (AI--O) bond. This oxygen atom is advantageously present in the form of an ester or ether functional group. These initiators are generally in the liquid state at ambient temperature and are furthermore miscible with .epsilon.-caprolactone, with the result that they can be used in the absence of solvent. The appropriate adjustment of the feed flow rates of .epsilon.-caprolactone and of initiator to the extruder permits the manufacture of custom-made poly-.epsilon.-caprolactones which have predesigned weight-average molecular masses.

Process for the continuous manufacture of poly-.epsilon.-caprolactones

The poly-.epsilon.-caprolactones are manufactured by continuous polymerization of .epsilon.-caprolactone as a melt in an extruder (reactive extrusion) with the involvement of a polymerization initiator chosen from aluminum alkoxides. The appropriate adjustment of the extruder feed rates of .epsilon.-caprolactone and of aluminum alkoxide allows the customized manufacture of poly-.epsilon.-caprolactones which have high and preestablished weight-average molecular masses. Poly-.epsilon.-caprolactones obtainabled by the process are characterized by weight-average molecular masses (M.sub.w) equal to at least approximately 95,000 g/mol and M.sub.w /M.sub.n ratios of at least approximately 2.

Process for the manufacture of poly-epsilon-caprolactones and

An amorphous powder of titanium oxide and of barium and/or strontium oxide is precipitated by the hydrolysis of titanium alcoholate in the presence of barium oxide, hydroxide or alcoholate or strontium oxide, hydroxide or alcoholate and an acid organic compound containing more than 6 carbon atoms, and the amorphous powder is heated while being treated with a stream of gas containing water vapour, ammonia or CO.sub.2, to crystallize the barium or strontium titanate and distill off the acid organic compound. The barium or strontium titanate crystals are less than one micron in size and have an irregular, angular morphology.

Process for the manufacture of barium titanate and/or strontium titanate

Process for the manufacture of a mixed metal oxide powder, in which at least one metal alcoholate is hydrolyzed in the presence of at least one metal oxide or hydroxide and of an acidic organic compound containing more than 6 carbon atoms in the molecule. The process is applicable to the production of barium titanate powders.

Growing community of inventors

Braine-le-Comte, Belgium

Henri Wautier