Biodegradable polymer expanded bead capable of being formed by steam compression molding
US12305015B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 14, 2024 |
| Grant date | May 20, 2025 |
| Priority date | — |
| Expiry date | Oct 14, 2044 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/54
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The present application discloses a biodegradable polymer expended bead capable of being formed by steam compression molding, including the following components in parts by weight: 10-88 parts of PBS, 10-88 parts of PLA, 1-4 parts of a chain extender masterbatch, 1-3 parts of a nucleating agent masterbatch and 5-12 parts of a supercritical CO2 foaming agent; wherein a concentration of optical isomer D-lactic acid monomer in a molecular chain of the PLA is 2-8%. The present application uses PBS and PLA as polymer matrixes, with an addition of a chain extender and a nucleating agent. The chain extender undergoes a chain extension reaction and a branching reaction with reactive end groups of PLA and PBS. The expended bead has good heat resistance, and can be formed using steam compression molding to obtain a steam compression molded product with good adhesion between beads and stable size.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.