C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
C08L 67/04 (2006.01) C09D 167/04 (2006.01)
Patent
CA 2503590
An aqueous dispersion of a biodegradable polyester, which comprises a copolymer of 3-hydroxybutylate and 3-hydroxyhexanoate having a weight average molecular weight of 50,000 to 3,000,000 and a flexural modulus of 100 to 1500 MPa, wherein the copolymer has an average particle diameter of 0.1 to 50 µm in the aqueous dispersion. The aqueous dispersion of a biodegradable polyester is excellent in film forming characteristics and can provide a resin coating film which is soft, exhibits good elongation and is proof to bending, when it is applied to a coating material, an adhesive agent, fiber texturing, sheet or film processing, paper conversion or the like.
L'invention concerne une dispersion aqueuse d'un polyester biodégradable, qui comprend un copolymère de 3-hydroxybutylate et de 3-hydroxyhexanoate et présente une masse moléculaire moyenne comprise entre 50000 et 3000000 et un module de flexion compris entre 100 et 1500 MPa, le copolymère présentant un diamètre moyen des particules compris entre 0,1 et 50 µm dans la dispersion aqueuse. Ladite dispersion possède d'excellentes caractéristiques filmogènes et permet de former un film de revêtement de résine souple présentant de bonnes propriétés d'allongement, résistant à la flexion lorsqu'il est appliqué sur une matière de revêtement, un agent adhésif, dans la texturation de fibres, le traitement de feuilles ou de films, la transformation des papiers ou analogue.
Miki Yasuhiro
Senda Kenichi
Kaneka Corporation
Riches Mckenzie & Herbert Llp
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