Polymer blend compositions and degradable extruded netting made therefrom

Patent metadata

Field	Value
Publication number	US-12157957-B2
Application number	US-201917280005-A
Country	US
Kind code	B2
Filing date	Oct 2, 2019
Priority date	Oct 3, 2018
Publication date	Dec 3, 2024
Grant date	Dec 3, 2024

Abstract

Degradable extruded nettings include a plurality of interconnected strands, at least some of the strands being made from a polymeric blend, the polymeric blend including polylactic acid polymer composition, polybutyrate adipate terephthalate polymer composition, polylactic acid-polybutyrate compatibilizer, and a degradation additive, the degradation additive including a degrader in a carrier resin.

First claim

The invention claimed is:

1. A degradable extruded netting comprising:
a plurality of interconnected strands, at least some of the strands being made from a polymeric blend, the polymeric blend including:
a polylactic acid composition in an amount ranging from about 55 wt % to about 60 wt %, wherein the polylactic acid composition comprises one or more polylactic acid polymers derived from plant starch;
a polybutylene adipate terephthalate (PBAT) composition in an amount ranging from about 35 wt % to about 40 wt %;
a compatibilizer composition in an amount ranging from about 0.5 wt % to about 3 wt %; and
a degradation additive in an amount ranging from about 2 wt % to about 7 wt %.

2. The degradable extruded netting of claim 1 , wherein the polymeric blend includes:
about 38 wt % polybutylene adipate terephthalate composition; and
about 2 wt % polylactic acid-polybutyrate compatibilizer.

3. The degradable extruded netting of claim 1 , wherein the degradation additive comprises a metal carboxylate in a carrier resin.

4. The degradable extruded netting of claim 1 , wherein the degradation additive comprises iron stearate in a carrier resin.

5. The degradable extruded netting of claim 1 , wherein the polybutylene adipate terephthalate (PBAT) composition comprises one or more polybutylene adipate terephthalate (PBAT) polymers.

6. The degradable extruded netting of claim 1 , wherein the compatibilizer composition comprises a compatibilizer selected from the group consisting of polypropyleneglycol diglycidyl ether, epoxidized cottonseed oil (ECSO), or maleinized (MCSO) cottonseed oil.

7. A composite comprising:
the degradable extruded netting of claim 1 , the netting having a first side and a second side opposite the first side; and
a first layer of material secured to the first side of the netting.

8. The degradable extruded netting of claim 1 , wherein the netting is configured for use as an erosion control netting.

9. A polymeric blend composition suitable for preparing a degradable extruded netting, the polymeric blend composition comprising:
a polylactic acid composition in an amount ranging from about 55 wt % to about 60 wt %;
a polybutyrate composition in an amount ranging from about 35 wt % to about 40 wt %;

a compatibilizer composition in an amount ranging from about 0.5 wt % to about 3 wt %,
wherein the compatibilizer composition comprises a compatibilizer selected from polypropyleneglycol diglycidyl ether, epoxidized cottonseed oil (ECSO), or maleinized (MCSO) cottonseed oil; and
a degradation additive in an amount ranging from about 2 wt % to about 7 wt %.

10. The polymeric blend composition of claim 9 , comprising:
about 38 wt % polybutyrate composition; and
about 2 wt % polylactic acid-polybutyrate compatibilizer.

11. The polymeric blend composition of claim 9 , wherein the degradation additive comprises a metal carboxylate in a carrier resin.

12. The polymeric blend composition of claim 9 , wherein the degradation additive comprises iron stearate in a carrier resin.

13. The polymeric blend composition of claim 9 , wherein the polybutyrate composition comprises one or more polybutylene adipate terephthalate (PBAT) polymers.

14. The polymeric blend composition of claim 9 , wherein the polylactic acid composition comprises one or more polylactic acid polymers derived from plant starch.

15. A degradable extruded netting comprising:
a plurality of interconnected strands, at least some of the strands being made from a polymeric blend, the polymeric blend including:
a polylactic acid composition in an amount ranging from about 55 wt % to about 60 wt %;
a polybutylene adipate terephthalate (PBAT) composition in an amount ranging from about 35 wt % to about 40 wt %;
a compatibilizer composition in an amount ranging from about 0.5 wt % to about 3 wt %, wherein the compatibilizer composition comprises a compatibilizer selected from the group consisting of polypropyleneglycol diglycidyl ether, epoxidized cottonseed oil (ECSO), or maleinized cottonseed oil (MCSO); and
a degradation additive in an amount ranging from about 2 wt % to about 7 wt %.

16. The degradable extruded netting of claim 15 , wherein the polymeric blend includes:
about 38 wt % polybutylene adipate terephthalate composition; and
about 2 wt % polylactic acid-polybutyrate compatibilizer.

17. The degradable extruded netting of claim 15 , wherein the degradation additive comprises a metal carboxylate in a carrier resin.

18. The degradable extruded netting of claim 15 , wherein the degradation additive comprises iron stearate in a carrier resin.

19. A composite comprising:
the degradable extruded netting of claim 15 , the netting having a first side and a second side opposite the first side; and
a first layer of material secured to the first side of the netting.

Assignees

• Delstar Tech Inc

Inventors

• Kirk Jeffrey David
• Thoen Andrew John

Classifications

• B32B5/24

  one layer being a fibrous or filamentary layer · CPC title

• B32B5/028

  Net structure, e.g. spaced apart filaments bonded at the crossing points · CPC title

• D10B2507/02

  Nets · CPC title

• D10B2401/12

  biodegradable · CPC title

• D10B2331/04

  polyesters, e.g. polyethylene terephthalate [PET] · CPC title