Bioplastic composition comprising biomass as a component and a production process

Patent metadata

Field	Value
Publication number	US-10961385-B2
Application number	US-201716311099-A
Country	US
Kind code	B2
Filing date	May 31, 2017
Priority date	Jul 28, 2016
Publication date	Mar 30, 2021
Grant date	Mar 30, 2021

Abstract

This invention discloses a bioplastic composition comprising biomass as a component comprising a plastic compound resin comprising polybutylene succinate (PBS), polylactic acid (PLA), and additives selected from biomass from the coffee roasting processes, i.e. silver skin of coffee (SSC); and/or at least one fluoropolymer or fluoropolymer derivative as a friction reducing agent. This invention also relates to a process of pretreating the silver skin coffee for using as an additive for bioplastic resin to produce various products or using as a natural color masterbatch together with other plastics via extrusion, injection molding, compression and thermoforming processes in the industrial level.

First claim

What is claimed is:

1. A bioplastic composition comprising biomass as a component comprising
a. a plastic compound resin comprising
i. 50-85 wt % of polybutylene succinate based on the total plastic compound resin weight
ii. 10-50 wt % of polylactic acid based on the total plastic compound resin weight

b. an additive selected from or comprising
i. 1-80 parts per hundred plastic compound resin (phr) of biomass from coffee roasting process which is silver skin of coffee, and/or
ii. 0.1-5 parts per hundred plastic compound resin (phr) of at least one fluoropolymer or fluoropolymer derivative as a friction reducing agent.

2. The bioplastic composition comprising biomass as a component according to claim 1 , wherein the polybutylene succinate content is 80-85 wt % based on the total plastic compound resin weight.

3. The bioplastic composition comprising biomass as a component according to claim 1 , wherein the polylactic acid content is 10-20 wt % based on the total plastic compound resin weight.

4. The bioplastic composition comprising biomass as a component according to claim 1 , wherein the silver skin of coffee is a pretreated silver skin of coffee.

5. The bioplastic composition comprising biomass as a component according to claim 4 , wherein the content of the pretreated silver skin of coffee is 5-70 parts per hundred plastic compound resin (phr).

6. A process for producing the bioplastic composition comprising biomass as a component according to claim 1 comprising the steps of:
a. pretreating the silver skin of coffee
b. preparing the plastic compound resin
c. injection molding the plastic compound resin with the additive.

7. The process for producing the bioplastic composition comprising biomass as a component according to claim 6 , wherein the pretreatment process of the silver skin of coffee comprising the steps of:
a. washing the silver skin of coffee
b. removing moisture from the washed silver skin of coffee.

8. The process for producing the bioplastic composition comprising biomass as a component according to claim 7 , wherein washing the silver skin of coffee is conducted using water as a solvent at 60-90° C., with a weight ratio of water to silver skin of coffee in a range of 60:1 to 1000:1.

9. The process for producing the bioplastic composition comprising biomass as a component according to claim 8 , wherein washing the silver skin of coffee is conducted with the weight ratio of water to silver skin of coffee is in a range of 100:1 to 200:1.

10. The process for producing the bioplastic composition comprising biomass as a component according to claim 7 , wherein removing moisture from the washed silver skin of coffee is conducted at 60-80° C. for at least 4 hours, or moisture of the silver skin of coffee being 2-10%.

11. The process for producing the bioplastic composition comprising biomass as a component according to claim 7 , wherein removing moisture from the washed silver skin of coffee is conducted at atmospheric pressure or vacuum condition.

12. The process for producing the bioplastic composition comprising biomass as a component according to claim 6 , wherein the preparation of plastic composition comprising the steps of:
a. compounding the plastic composition with the additive,
b. cutting and storing the plastic compound resin having additive,
c. removing moisture from the plastic compound resin having additive.

13. The process for producing the bioplastic composition comprising biomass as a component according to claim 12 , wherein removing moisture from the plastic compound resin having additive is conducted at 60-80° C. for at least 4 hours or moisture of the silver skin of coffee being 2-5%.

14. A method of utilizing the bioplastic composition comprising biomass as a component according to claim 1 as a natural color masterbatch together with other bioplastics and/or together with conventional plastics in a ratio of 5-99 parts per hundred plastic compound resin (phr).

15. The method according to claim 14 , wherein the ratio of the natural color masterbatch together with other bioplastics and/or together with conventional plastics is 10-40 parts per hundred plastic compound resin (phr).

16. The method according to claim 14 , wherein the other bioplastics are selected from polylactic acid, polybutylene succinate, polybutylene succinate-co-adipate or polybutylene adipate terephthalate.

17. The method according to claim 14 , wherein the conventional plastic is selected from polyolefins, polystyrene, polyamide, acrylonitrile-co-butadiene-co-styrene.

18. A method of utilizing the bioplastic composition comprising biomass as a component according to claim 1 as a feeding material for an industrial plastic molding process selected from extrusion, injection, compression or thermoforming process.

19. The method according to claim 18 , wherein the industrial plastic molding process is injection process.

20. The process for producing the bioplastic composition comprising biomass as a component according to claim 10 , wherein removing moisture from the washed silver skin of coffee is conducted at 60-80° C. for 8-12 hours.

21. The process for producing the bioplastic composition comprising biomass as a component according to claim 12 , wherein removing moisture from the washed silver skin of coffee is conducted at atmospheric pressure.

Assignees

• Ptt Public Company Ltd
• Ptt Global Chemical Public Co Ltd

Inventors

• Junkasem Jirawut
• Kaabbuathong Narin
• Thammongkol Vivan
• Paiboolsuk Janjira
• Hemmood Supattra

Classifications

• C08L67/02 Primary

  Polyesters derived from dicarboxylic acids and dihydroxy compounds (C08L67/06 takes precedence) · CPC title

• C08J3/22

  using masterbatch techniques · CPC title

• C08L67/04

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

• C08K11/005

  Waste materials, e.g. treated or untreated sewage sludge · CPC title

• C08K5/02

  Halogenated hydrocarbons {(C08K5/0091 takes precedence)} · CPC title