Composite based on polylactic acid and a polyamide, having improved impact strength, and its manufacturing process and use
AssigneeArkema France
InventorsBenoit Brule, Thomas Fine, Jean-Jacques Flat, Maho Yasuda
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Abstract
The present invention relates to a composite having improved impact resistance. According to the invention, this composite is obtained from a composition comprising the following polymers: polylactic acid (PLA) which forms the matrix; at least one polyamide forming a dispersed phase within the PLA matrix; at least one functionalized polyolefin (A) comprising alpha-olefin units and epoxy, carboxylic acid or carboxylic acid anhydride units; and, optionally, at least one unfunctionnalized polyolefin (B).
Claims10
A composite having improved impact strength, comprising:
- polylactic acid (PLA) as the matrix;
- at least one polyamide as the disperse phase in said PLA matrix;
- at least one functionalized polyolefin (A) comprising α-olefin units and one and more functional group units selected from the group consisting of epoxide, carboxylic acid or carboxylic acid anhydride units;
- and,
- optionally, at least one unfunctionnalized polyolefin (B),
- said composite does not contain polyoxymethylene (POM).
A process for manufacturing a composite comprising:
- polylactic acid (PLA) as the matrix;
- at least one polyamide as the disperse phase in said PLA matrix;
- at least one functionalized polyolefin (A) comprising α-olefin units and one or more functional group units selected from the group consisting of epoxide, carboxylic acid and carboxylic acid anhydride units;
- and,
- optionally,
- at least one unfunctionnalized polyolefin (B),
- said composite does not contain polyoxymethylene (POM)
- comprising the step of blending the various polymers by compounding.
An article comprising:
- polylactic acid (PLA) as the matrix;
- at least one polyamide as the disperse phase in said PLA matrix;
- at least one functionalized polyolefin (A) comprising α-olefin units and one or more functional group units selected from the group consisting of epoxide, carboxylic acid and carboxylic acid anhydride units;
- and,
- optionally,
- at least one unfunctionnalized polyolefin (B),
- said composite does not contain polyoxymethylene (POM), wherein said article is formed by compression molding, injection molding, extrusion or thermoforming.
Dependencies are inferred from the claim text.