Modified polylactic acid, polymeric blends and methods of making the same

Patent metadata

Field	Value
Publication number	US-10113062-B2
Application number	US-201615378919-A
Country	US
Kind code	B2
Filing date	Dec 14, 2016
Priority date	Feb 18, 2011
Publication date	Oct 30, 2018
Grant date	Oct 30, 2018

Abstract

Polymeric compositions and processes of forming the same are discussed herein. The processes generally include contacting a polylactic acid with a reactive modifier selected from epoxy-functionalized polybutadiene, ionic monomer, and combinations thereof.

First claim

What is claimed is:

1. A process for forming a polymeric composition comprising:
contacting a polylactic acid with a reactive modifier selected from epoxy-functionalized polybutadiene, ionic monomer, and combinations thereof; and
contacting the polylactic acid and the reactive modifier with a polyolefin to produce a polyolefin-polylactic acid blend, wherein the polyolefin exhibits a melt flow rate of less than about 6 dg/min.

2. The process of claim 1 , wherein the polyolefin exhibits a melt flow rate ranging from about 0.5 dg/min. to about 6 dg/min.

3. The process of claim 1 , wherein the polylactic acid is selected from poly(D-lactide), poly(L-lactide), poly(DL-lactide), and combinations thereof.

4. The process of claim 1 , wherein the polylactic acid has a concentration of from about 2 wt. % to about 98 wt. % based on the total weight of the polymeric composition.

5. The process of claim 1 , wherein the reactive modifier contacts the polylactic acid in a concentration of from about 2 wt. % to about 30 wt. % based on the total weight of the polymeric composition.

6. The process of claim 1 , wherein the reactive modifier is an epoxy-functionalized polybutadiene oligomer.

7. The process of claim 6 , wherein the epoxy-functionalized polybutadiene oligomer has a number average molecular weight in a range from about 500 g/mol to about 20000 g/mol.

8. The process of claim 1 , wherein the reactive modifier is an ionic monomer.

9. The process of claim 8 , wherein the ionic monomer is an organometallic salt having acrylate functional groups.

10. The process of claim 1 , wherein the polyolefin is selected from polypropylene, polyethylene, copolymers thereof and combinations thereof.

11. The process of claim 1 , wherein the polyolefin has a concentration of from about 2 wt. % to about 98 wt. % based on the total weight of the polymeric composition.

12. The process of claim 1 , further comprising processing the polymeric composition using fiber extrusion or coextrusion.

13. A process comprising:
forming a polymeric composition by contacting a polylactic acid with a reactive modifier selected from epoxy-functionalized polybutadiene, ionic monomer, and combinations thereof;
processing the polymeric composition using one or more polymer processing techniques selected from: film, sheet, pipe extrusion or coextrusion, blow molding, injection molding, rotary molding, and thermoforming.

Assignees

• Fina Technology

Inventors

• Li Fengkui
• Ashbaugh John
• Rauscher David
• Dotter Robert

Classifications

• C08L23/12

  Polypropene · CPC title

• C08L67/04 Primary

  Polyesters derived from hydroxycarboxylic acids, e.g. lactones (C08L67/06 takes precedence) · CPC title

• C04B40/0245

  including a pre-curing step not involving a steam or autoclave treatment · CPC title

• C04B38/0054

  the pores being microsized or nanosized · CPC title

• C04B28/18

  containing mixtures of the silica-lime type · CPC title