C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
C08L 3/02 (2006.01) C08G 18/32 (2006.01) C08G 18/64 (2006.01) C08J 3/20 (2006.01) C08K 5/053 (2006.01) C08K 5/29 (2006.01) C08L 3/04 (2006.01) C08L 51/06 (2006.01)
Patent
CA 2712901
The subject matter of the present invention is a starch-based composition comprising: (a) at least 51% by weight of a plasticized amylaceous composition comprising starch and a plasticizer for said starch, obtained by thermomechanically mixing granular starch and a plasticizer for said starch, (b) at most 49% by weight of at least one non-amylaceous polymer, and (c) a bonding agent having a molecular mass of less than 5000, comprising at least two functions, at least one which is capable of reacting with the plasticizer and at least another of which is capable of reacting with the starch and/or the non-amylaceous polymer, these amounts being expressed with respect to solids and relative to the sum of (a) and (b), a method for preparing such a composition and a thermoplastic composition obtained by heating such a composition.
La présente invention a pour objet une composition à base d'amidon comprenant: (a) au moins 51% en poids d'une composition amylacée plastifiéeconstituée d'amidon et d'un plastifiant de celui-ci, obtenue par mélange thermomécaniqued'amidon granulaire et d'un agent plastifiantde celui-ci, (b) au plus 49% en poids d'au moins un polymère non amylacé, et(c) un agent de liaison ayant une masse moléculaire inférieure à 5000 comportant au moins deux fonctions dont au moins une est capable de réagir avec le plastifiant et au moins une autre est capable de réagir avec l'amidon et/ou le polymère non amylacé, ces quantités étant exprimées en matières sèches et rapportées à la somme de (a) et (b), un procédé de préparation d'une telle composition ainsi qu'une composition thermoplastique obtenuepar chauffage d'une telle composition.
Gimenez Jerome
Lagneaux Didier
Mentink Leon
Norton Rose Canada S.e.n.c.r.l.,s.r.l./llp
Roquette Freres
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