Polymer composition

Patent metadata

Field	Value
Publication number	US-10273356-B2
Application number	US-201414899485-A
Country	US
Kind code	B2
Filing date	Jun 13, 2014
Priority date	Jun 18, 2013
Publication date	Apr 30, 2019
Grant date	Apr 30, 2019

Abstract

A composition may contain a first polymer, a second polymer, and a block copolymer. The first polymer may be polylactic acid, starch, polybutylene succinate, poly(butylene adipate-co-terephthalate), or a mixture thereof. The second polymer may be polybutadiene, high impact polystyrene, or a mixture thereof. The block copolymer may be a block copolymer of polylactic acid and polybutadiene. The composition may be prepared by a process that includes contacting the first polymer with the second polymer and the block copolymer. Articles may be prepared from the composition.

First claim

The invention claimed is:

1. A composition comprising:
a first polymer, wherein the first polymer is starch;
a second polymer consisting of polybutadiene, wherein the polybutadiene has a weight average molecular weight of 280,000 to 360,000 g/mol; and
a block copolymer of polylactic acid (PLA) and polybutadiene (PB), wherein the block copolymer is selected from the group consisting of PLA-PB-PLA triblock copolymer, PLA-PB multiblock copolymer, PLA-PB star copolymers, PLA-PB comb copolymers, PLA-PB gradient containing block copolymers; and mixtures thereof.

2. The composition according to claim 1 , wherein the composition comprises from 5 to 95% by weight of the first polymer based on a total weight of the composition.

3. The composition according to claim 1 , wherein the composition comprises from 5 to 95% by weight of the second polymer based on a total weight of the composition.

4. The composition according to claim 1 , wherein the composition comprises from 1 to 90% by weight of the block copolymer based on a total weight of the composition.

5. The composition according to claim 1 , wherein the composition comprises:
from 30 to 48% by weight of the first polymer based on a total weight of the composition;
from 30 to 48% by weight of the second polymer based on the total weight of the composition; and
from 4 to 40% by weight of the block copolymer based on the total weight of the composition.

6. An article comprising the composition according to claim 1 .

7. An article formed using a process comprising:
contacting a first polymer with a second polymer and with a block copolymer of polylactic acid (PLA) and polybutadiene (PB);
processing the composition using one or more polymer processing techniques selected from the group consisting of: film, sheet, pipe and fiber extrusion or coextrusion; blow molding;
injection molding; rotary molding; foaming; and thermoforming;
wherein the first polymer is selected from the group consisting of starch, polybutylene succinate, poly(butylene adipate-co-terephthalate), and mixtures thereof;
wherein the second polymer is polybutadiene, wherein the polybutadiene has a weight average molecular weight of 280,000 to 360,000 g/mol.

8. A composition comprising:
a first polymer selected from the group consisting of polylactic acid, starch, polybutylene succinate, poly(butylene adipate-co-terephthalate), and mixtures thereof;
a second polymer consisting of polybutadiene, wherein the polybutadiene has a weight average molecular weight of 280,000 to 360,000 g/mol; and
a block copolymer of polylactic acid (PLA) and hydroxyl functionalized polybutadiene (PB).

9. The composition according to claim 8 , wherein the block copolymer is selected from the group consisting of PLA-PB diblock copolymer, PLA-PB-PLA triblock copolymer, PLA-PB multiblock copolymer, PLA-PB star copolymers, PLA-PB comb copolymers, PLA-PB gradient containing block copolymers; and mixtures thereof.

10. The composition according to claim 9 , wherein the block copolymer is selected from the group consisting of PLA-PB-PLA triblock copolymer, PLA-PB multiblock copolymer, PLA-PB star copolymers, PLA-PB comb copolymers, PLA-PB gradient containing block copolymers; and mixtures thereof.

11. The composition according to claim 8 , wherein the first polymer is polylactic acid.

12. The composition according to claim 11 , wherein the poly-L-lactide or poly-D-lactide has an optical purity of at least 98% by weight.

13. The composition of claim 8 , wherein the first polymer is starch, polybutylene succinate, poly(butylene adipate-co-terephthalate), or mixtures thereof.

14. The composition according to claim 8 , wherein the polybutadiene has a polydispersity index of from 2.1 to 2.3.

15. The composition according to claim 8 , wherein the polybutadiene has a cis content of at least 95% as measured by infrared spectroscopy.

16. The composition according to claim 8 , wherein the polybutadiene is functionalized polybutadiene, wherein the functionalization is hydroxyl, epoxy, maleic anhydride, or silane.

17. The composition according to claim 8 , wherein the PB has a vinyl content of at least 15%.

18. The composition of claim 17 , wherein the PB incorporates a mono-olefin.

19. The composition of claim 8 , wherein the block copolymer has at least 10% by weight of PB based on the total weight of the block copolymer.

20. The composition of claim 1 , wherein the second polymer is polybutadiene, wherein the polybutadiene has a polydispersity index of from 2.1 to 2.3.

21. The composition of claim 1 , wherein the polybutadiene has a cis content of at least 95% as measured by infrared spectroscopy.

Assignees

• Total Res & Technology Feluy

Inventors

• Coupin Thierry

Classifications

• B29C45/0001

  characterised by the choice of material · CPC title

• B29C41/003

  characterised by the choice of material · CPC title

• B29C47/0023

  Operations & Transport · mapped topic

• C08L9/06

  Copolymers with styrene · CPC title

• C08L3/02

  Starch; Degradation products thereof, e.g. dextrin · CPC title