Rotomolded articles comprising a layer of polyolefin and polyester

Patent metadata

Field	Value
Publication number	US-10208191-B2
Application number	US-201214343555-A
Country	US
Kind code	B2
Filing date	Sep 7, 2012
Priority date	Sep 9, 2011
Publication date	Feb 19, 2019
Grant date	Feb 19, 2019

Abstract

A rotomolded article can have one or more layers, including a layer A. The layer A can have from 50 to 99.4 wt % of a polyolefin, from 0.5 to 50 wt % of a polyester, and from 0.1 to 20 wt % of a co- or ter-polymer. The co- or ter-polymer can have 50 to 99.9 wt % of an ethylene or a styrene monomer, 0.1 to 50 wt % of an unsaturated anhydride-containing monomer, epoxide-containing monomer or carboxylic acid-containing monomer, and 0 to 50 wt % (meth)acrylic ester monomer.

First claim

The invention claimed is:

1. A rotomoulded article having one or more layers comprising:
a layer A that comprises:
from 50 to 99.4 wt % of a polyolefin;
from 0.5 to 50 wt % of a poly(lactic acid), wherein the poly(lactic acid) comprises an optical purity of at least 92 wt %; and
from 0.1 wt % to no more than 5 wt % of a ter-polymer that comprises:
50 to 99.9 wt % of styrene monomer;
0.1 to 50 wt % of an unsaturated anhydride-containing monomer, epoxide-containing monomer or carboxylic acid-containing monomer; and
0.1 to 50 wt % of a (meth)acrylic ester monomer, wherein the (meth)acrylic ester monomer is methyl (meth)acrylate, ethyl (meth)acrylate, n-butyl (meth)acrylate, iso-butyl (meth)acrylate, 2-ethylhexyl (meth)acrylate, or n-octyl (meth)acrylate.

2. The article according to claim 1 , wherein the polyolefin is a polyethylene.

3. The article according to claim 1 , wherein the unsaturated anhydride-containing monomer, epoxide-containing monomer, or carboxylic acid-containing monomer is maleic anhydride or glycidyl methacrylate.

4. The article according to claim 1 , wherein the article comprises a layer B1 that comprises from 50 to 100 wt % of an aliphatic polyester selected from polyhydroxyalkanoate, poly(lactic acid), polycaprolactone, copolyesters and polyesteramides.

5. The article according to claim 4 , wherein layer B1 is adjacent to layer A.

6. The article according to claim 4 , wherein the aliphatic polyester is a poly(lactic acid).

7. The article according to claim 4 , wherein layer A is an outer layer and layer B 1 is an inner layer.

8. The article according to claim 1 , wherein the article comprises a layer B that comprises from 50 to 100 wt % of a polyolefin.

9. The article according to claim 8 , wherein layer B is adjacent to layer A.

10. The article according to claim 8 , wherein the polyolefin of layer B is a polyethylene.

11. The article according to claim 8 , wherein layer B is foamed.

12. The article according to claim 8 , wherein the article comprises layer A, layer B and layer B1, wherein:
layer A is an outer layer;
layer B is an intermediate layer adjacent to layer A and layer B1; and
layer B1 is an inner layer.

13. The article of claim 12 , wherein layer B1 is comprises from 50 to 100 wt % of an aliphatic polyester selected from polyhydroxyalkanoate, poly(lactic acid), polycaprolactone, copolyesters and polyesteramides.

14. The article according to claim 1 , wherein said article comprises at least one cavity provided with polyurethane.

15. The article according to claim 1 , wherein the article is a bottle, a can, a tank, or a car part.

16. The article according to claim 1 , wherein the article is a car door or a car body.

17. The article according to claim 1 , wherein the polylactic acid used in layer A has a crystallinity index as measured by XRD of between 5% and 60%.

18. The article according to claim 1 , wherein the polylactic acid used in layer A is a copolymer of lactic acid and trimethylene carbonate or urethanes.

19. The article according to claim 1 , wherein the polylactic acid in layer A has R—OH and R—COOH chain termination.

20. The article according to claim 1 , wherein the unsaturated anhydride-containing monomer, epoxide-containing monomer or carboxylic acid-containing monomer is glycidyl methacrylate.

21. The article of claim 1 , wherein the unsaturated anhydride-containing monomer, epoxide-containing monomer or carboxylic acid-containing monomer is an epoxide-containing monomer or carboxylic acid-containing monomer.

22. The article of claim 1 , wherein the polyolefin is polyethylene having a comonomer distribution index of at least 75% as measured by TREF.

23. The article of claim 1 , wherein the article is coated without surface treatment.

Assignees

• Maziers Eric
• Total Res & Technology Feluy

Inventors

• Maziers Eric

Classifications

• B32B2439/62

  Boxes, cartons, cases · CPC title

• Y10T428/1397

  Single layer [continuous layer] · CPC title

• B32B1/02

  Operations & Transport · mapped topic

• B32B2307/308

  Heat stability · CPC title

• B32B2270/00

  Resin or rubber layer containing a blend of at least two different polymers · CPC title