Solvay (societe Anonyme)

Roquette Freres

Solvay Sa

Solvay & Cie (societe Anonyme)

Thierry Depireux

Claude Dehennau

Guy M Fleche

Serge Gosset

Ivan Claeys

Didier Videau

Disclosed is a thermoformable composition characterized in that it contains at least one starchy compound, at least one biodegradable polyester and at least one salt of hydroxycarboxylic acid.

Biodegradable moulding compositions comprising a starch, a biodegradable

The invention relates to an alloy composition possessing improved properties of mechanical resistance. The composition contains a starch, which is preferably plasticized, and a polymer which acts as coupling agent which is chosen from the group consisting of polyolefins modified by chemical functional groups which are active toward the hydroxyl functional groups of starch. Generally, the composition also contains a thermoplastic polymer. The invention also relates to the process for preparing this composition and the use of these compositions for the manufacture of films intended for the paper market and for packages made from biodegradable plastic.

Starch-based composition

The invention relates to polymeric compositions comprising at least one polyolefin, at least one thermoplastic starch and at least one ionic compound, the latter being present in a content such that the concentration of anions and of cations in the composition is from 0.002 to 5 mol/kg. It also relates to the master mixture used for the manufacture of these compositions and containing the thermoplastic starch and the ionic compound. The compositions are suitable, in particular, for the production of mono- or multilayer films which can be used, especially, in the paper-making industry.

Polymeric compositions for the production of high-frequency-weldable

The invention relates to an alloy composition possessing improved properties of mechanical resistance. The composition contains a starch, which is preferably plasticised, and a polymer which acts as coupling agent which is chosen from the group consisting of polyolefins modified by chemical functional groups which are active towards the hydroxyl functional groups of starch. Generally, the composition also contains a thermoplastic polymer. The invention also relates to the process for preparing this composition and the use of these compositions for the manufacture of films intended for the paper market and for packages made from biodegradable plastic.

A mixture is produced, comprising from 50 to 95% by weight of at least one vinyl chloride-based resin, from 1 to 20% by weight of at least one olefin-based resin, from 1 to 20% by weight of a copolymer of ethylene and vinyl acetate which has a vinyl acetate content of between 10 and 35% and from 2 to 40% by weight of a copolymer of ethylene and vinyl acetate which has a vinyl acetate content of between 60 and 95%, and the product thus obtained is then processed. The process makes it possible in particular to produce sheets which have good mechanical properties and which have a remarkable transparency.

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Waterloo, Belgium

Thierry Depireux