Degradable composite polymer and method of making such...

C - Chemistry – Metallurgy – 08 – L

Patent

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C08L 3/00 (2006.01) B08B 7/00 (2006.01) B24C 11/00 (2006.01) C08L 3/02 (2006.01) C08L 67/04 (2006.01) C08L 23/08 (2006.01)

Patent

CA 2285458

A novel degradable composite polymer is comprised of a polymer comprised of lactic acid monomers, and a resin comprised of a thermoplastic polymer, destructured starch and a plasticizer. This composite polymer is made by first combining the lactic acid polymer and the resin and subsequently extruding the combination through a heated extruder. These substances may be combined in various proportions to obtain materials of various flexibilities and hardnesses. This degradable composite polymer can be used in many applications, including use as a printable plastic material due to its unique ability to retain ink and as a plastic media blast material as it can be created in a variety of hardness levels.

L'invention concerne un nouveau polymère composite dégradable constitué d'un polymère formé de monomères d'acide lactique, et d'une résine constituée d'un polymère thermoplastique, d'amidon déstructuré et d'un plastifiant. Ce polymère composite est produit d'abord par combinaison du polymère d'acide lactique et de la résine, et extrusion ultérieure de cette combinaison par une extrudeuse à chaud. Ces substances peuvent être combinées selon diverses proportions en vue d'obtenir des matières de diverses flexibilités et duretés. Le polymère composite dégradable peut être utilisé dans de nombreuses applications, notamment comme matière plastique imprimable en raison de sa capacité particulière à retenir l'encre, et comme matière de projection à support plastique du fait qu'il peut être produit dans divers degrés de dureté.

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