# US 11,898,032 B2 · Biodegradable composition

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- Number: US 11,898,032 B2
- Document ID: US11898032B2
- Status: Granted
- Kind: B2
- Application number: 17/250,790
- Filed: 2018-09-07
- Published: 2021-11-11
- Granted: 2024-02-13
- Earliest claimed: 2018-09-07
- Assignees: Chien-Chung Huang
- Applicants: Chien-Chung Huang
- Inventors: Chien-Chung Huang; Yeng-Fong Shih
- Web page: https://patentgrep.com/patent/US11898032B2

## CPC

- C08L 67/04: Polyesters derived from hydroxycarboxylic acids, e.g. lactones (C08L67/06 takes precedence)
- C08K 7/02: Fibres or whiskers
- C08L 67/02: Polyesters derived from dicarboxylic acids and dihydroxy compounds (C08L67/06 takes precedence)
- C08L 97/02: Lignocellulosic material, e.g. wood, straw or bagasse {(manufacture of articles made from lignocellulosic material by dry processes B27N)}
- C08L 1/02: Cellulose; Modified cellulose
- C08L 2201/06: Biodegradable
- C08L 2205/02: containing two or more polymers of the same C08L -group
- C08L 2205/16: Fibres; Fibrils
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)
- C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09)

## Abstract

Disclosed is a biodegradable composition, including: 5 to 90 percent by weight of polylactic acid (PLA), 5 to 80 percent by weight of plant fiber, and 5 to 70 percent by weight of maleic anhydride-grafted polybutylene succinate (PBS-g-MA), acrylic acid-grafted polybutylene succinate (PBS-g-AA), or silane coupling agent-grafted polybutylene succinate (PBS-g-Silane). The article manufactured therefrom is not only biodegradable but also has an enhanced heat deformation temperature, impact resistance and tensile strength. Further, by so limiting the proportion of each component, compatibility between the components may be increased and crystallization of polylactic acid may be facilitated.

## Claims

### Claim 1

A biodegradable composition, comprising: 30-50% by weight of polylactic acid (PLA); 20-40% by weight of plant fiber; and 15-30% by weight of PBS-g-MA wherein the components are based on 100 wt % of the composition.

### Claim 2 (depends on 1)

The biodegradable composition as claimed in claim 1, wherein the plant fiber is at least one selected from a group consisting of sugarcane fiber, bamboo fiber, coconut fiber, hemp fiber, palm husk fiber, coffee grounds, wine dregs, wheat dregs, cotton, rice stalk, rice husk, corn stalk, starch, white bamboo shoots and wood flour.

### Claim 3

A biodegradable composition, comprising: 30-50% by weight of polylactic acid (PLA); 20-40% by weight of plant fiber; and 15-30% by weight of PBS-g-AA wherein the components are based on 100 wt % of the composition.

### Claim 4 (depends on 3)

The biodegradable composition as claimed in claim 3, wherein the plant fiber is at least one selected from a group consisting of sugarcane fiber, bamboo fiber, coconut fiber, hemp fiber, palm husk fiber, coffee grounds, wine dregs, wheat dregs, cotton, rice stalk, rice husk, corn stalk, starch, white bamboo shoots and wood flour.

### Claim 5

A biodegradable composition, comprising: 30-50% by weight of polylactic acid (PLA); 20-40% by weight of plant fiber; and 15-30% by weight of PBS-g-Silane wherein the components are based on 100 wt % of the composition.

### Claim 6 (depends on 5)

The biodegradable composition as claimed in claim 5, wherein the plant fiber is at least one selected from a group consisting of sugarcane fiber, bamboo fiber, coconut fiber, hemp fiber, palm husk fiber, coffee grounds, wine dregs, wheat dregs, cotton, rice stalk, rice husk, corn stalk, starch, white bamboo shoots and wood flour.