Bio-based copolyester or copolyethylene terephthalate
US10266646B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 29, 2016 |
| Grant date | Apr 23, 2019 |
| Priority date | — |
| Expiry date | Mar 2, 2036 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G63/20
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention relates to bio-copolyester of polyethylene terephthalate composition prepared from raw materials which are derived from biomass. The bio-composition comprises: 1) about 92 to about 99 mole % of bioPET, prepared from bioMEG and bioPTA, 2) about 1 to about 8 mole % bio-based acids, bio-based diols and/or bio-based branching agents. Bio-based acids include bio-aliphatic diacids or bio-aromatic diacids, or their corresponding bio-esters, or a mixture thereof. Bio-based diols include bio-aliphatic diol comprising 3 to 20 carbon atoms, bio-cycloaliphatic diol of 6 to 20 carbon atoms, or bio-aromatic diol comprising 6 to 14 carbon atoms, or a mixture thereof. Bio-based branching agents include bio-aliphatic compounds having more than two functionalities such as bio-trimellitic anhydride, bio-trimethylol propane, or bio-pentaerythritol, or a blend thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.