Low viscosity polyester polyols and methods for preparing same
US6664363B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 9, 2002 |
| Grant date | Dec 16, 2003 |
| Priority date | — |
| Expiry date | Jan 9, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G63/916
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention relates to low viscosity aromatic polyester polyols having an average functionality of two and methods for preparing such polyols. In particular, the invention relates to low viscosity aromatic polyester polyols prepared by reacting a phthalic acid based material with diethylene glycol, a higher functional polyol having an average functionality of greater than two and a long chain alkyl acid, ester or oil. The resulting aromatic polyester polyol has an average functionality of two and has a lower dynamic viscosity as compared to the esterification product of a phthalic acid based material with diethylene glycol alone.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.