Polymer material based on polylactic acid
AssigneeAgc Glass Europe
InventorsSophie Dropsit, Philippe Dubois, Laurent Paternostre, Francois Rase, Olivier Talon
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Abstract
The invention relates to a polymer material comprising a mixture of: a base polylactic acid (PLA) polymer formed by between 60 wt.-% and 85 wt.-% L units and between 15 wt.-% and 40 wt.-% D units or between 60 wt.-% and 85 wt.-% D units and between 15 wt.-% and 40 wt.-% L units; and a plasticizer selected from the group containing citric acid esters, glycerin esters and derivatives, poly(alkylene ethers), oligomers of lactide or derivatives of lactic acid, fatty acid esters and epoxidized oils, representing between 10 wt.-% and 40 wt.-% in relation to the total weight of the polymer material.
Claims2
A laminated assembly according, comprising:
- at least two substrates, and
- an interposed film of impact- and tear-resistant polymer material comprising a mixture (i) of a base polylactic acid polymer comprising 15% to 30% by weight of a D structural unit and 70% to 85% of an L structural unit;
- and (ii) a plasticizer in a content of from 15% to 20% by weight based on a total weight of the impact- and tear-resistant polymer material,
- wherein one of the at least two substrates is a glass substrate,
- wherein the interposed film lies between the at least two substrates,
- wherein the plasticizer is n-tri-butyl citrate, and
- wherein a Young's modulus of the interposed film is from 2 to 56 MPa.
Dependencies are inferred from the claim text.