Polymer material based on polylactic acid

• US 9,969,149 B2
• Filed: 06/06/2012
• Issued: 05/15/2018
• Est. Priority Date: 06/23/2011
• Status: Active Grant

• Current Assignee: AGC Glass Europe SA (AGC, Inc.)
• Original Assignee: AGC Glass Europe SA (AGC, Inc.)
• Inventors: Dropsit, Sophie, Dubois, Philippe, Paternostre, Laurent, Rase, Francois, Talon, Olivier
• Primary Examiner(s): Chen, Vivian
• Application Number:
  US14/128,956
• Publication Number:
  US 20140134441A1
• Time in Patent Office: 2,169 Days
• Field of Search: None
• CPC Class Codes: B32B 17/06 comprising glass as the main or only constituent of a layer, next to another layer of a specific material
• CPC Class Codes: B32B 17/10 of synthetic resin
• CPC Class Codes: B32B 17/1055 characterized by the resin layer, i.e. interlayer
• CPC Class Codes: B32B 17/10605 Type of plasticiser
• CPC Class Codes: B32B 17/10697 being cross-linked
• CPC Class Codes: B32B 17/10779 containing polyester
• CPC Class Codes: B32B 2250/03 3 layers
• CPC Class Codes: B32B 2264/10 Inorganic particles
• CPC Class Codes: B32B 2307/50 having particular mechanical properties
• CPC Class Codes: B32B 2307/558 Impact strength, toughness
• CPC Class Codes: B32B 2307/5825 Tear resistant
• CPC Class Codes: B32B 2307/746 Slipping, anti-blocking, low friction
• CPC Class Codes: B32B 2315/08 Glass
• CPC Class Codes: B32B 2367/00 Polyesters, e.g. PET, i.e. polyethylene terephthalate
• CPC Class Codes: B32B 27/18 characterised by the use of special additives
• CPC Class Codes: B32B 27/22 using plasticisers
• CPC Class Codes: B32B 27/36 comprising polyesters
• CPC Class Codes: B32B 27/365 comprising polycarbonates
• CPC Class Codes: C08G 63/02 Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds
• CPC Class Codes: C08G 63/06 derived from hydroxycarboxylic acids
• CPC Class Codes: C08G 63/08 : Lactones or lactides
• CPC Class Codes: C08K 3/34 : Silicon-containing compounds
• CPC Class Codes: C08K 5/00 : Use of organic ingredients
• CPC Class Codes: C08K 5/0016 : Plasticisers
• CPC Class Codes: C08K 5/10 : Esters; Ether-esters
• CPC Class Codes: C08K 5/11 : of acyclic polycarboxylic acids
• CPC Class Codes: C08K 5/1515 : Three-membered rings
• CPC Class Codes: C08K 5/20 : Carboxylic acid amides
• CPC Class Codes: C08L 67/04 : Polyesters derived from hydroxycarboxylic acids, e.g. lactones C08L67/06 takes precedence
• CPC Class Codes: Y10T 428/31616 : Next to polyester [e.g., alkyd]
• CPC Class Codes: Y10T 428/31786 : Of polyester [e.g., alkyd, etc.]
• CPC Class Codes: Y10T 428/31794 : Of cross-linked polyester

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.

Claims

1. 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.

2. The laminated assembly according to claim 1, wherein an elongation at break of the interposed film is 350% to 620%.