Cycloaliphatic polyester polyols from thermoplastic polyesters
US9522976B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 29, 2016 |
| Grant date | Dec 20, 2016 |
| Priority date | — |
| Expiry date | Mar 29, 2036 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09D175/06
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Cycloaliphatic polyester polyols and processes for making them from thermoplastic polyesters are disclosed. One process comprises heating a thermoplastic polyester with a glycol to give a digested intermediate and hydrogenating aromatic rings in the digested intermediate to produce the cycloaliphatic polyester polyol. Optionally, the digested intermediate is reacted with a hydrophobe to give a modified polyol prior to hydrogenation, and the modified polyol is hydrogenated to give the cycloaliphatic polyester polyol. The high-recycle-content cycloaliphatic polyester polyols have desirable attributes for formulating polyurethane dispersions, two-component polyurethane coatings, mono- or poly(meth)acrylates, polyisocyanurates, flexible and rigid foams, coatings, adhesives, sealants, and elastomers, and they provide a sustainable alternative to petrochemical-based polyols.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.