Polyester resin and method for producing polyester resin
US12187845B2 · kind B2 · utility
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Key dates
| Filing date | Nov 2, 2023 |
| Grant date | Jan 7, 2025 |
| Priority date | — |
| Expiry date | Nov 2, 2043 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G63/672
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A polyester resin containing: a diol constituent unit containing a unit a1 derived from spiroglycol represented by formula (1) and a unit a2 derived from ethylene glycol; and a dicarboxylic acid constituent unit containing a unit b derived from terephthalic acid and/or an ester thereof. A content of the unit a1 is from 5 to 60 mol % and a content of the unit a2 is from 30 to 95 mol %, based on a total amount of the unit a1 and the unit a2. A content of the unit b is from 80 to 100 mol % based on a total amount of the dicarboxylic acid constituent unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.