Novel aromatic polyester polyol mixtures made from polyethylene terephthalate residues and alkylene oxides
US4439549A · kind A · utility
19Cited by
2References
18Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 22, 1982 |
| Grant date | Mar 27, 1984 |
| Priority date | — |
| Expiry date | Nov 22, 2002 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G2115/02
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Mixtures of aromatic polyols containing ester functionalities suitable for use in rigid polyurethane and polyisocyanurate foams are described. The mixtures are prepared by reacting a polyethylene terephthalate (PET) residue with an alkylene oxide in the presence of a basic catalyst. These novel polyol mixtures may be blended with conventional polyols to yield rigid foams with better flammability resistance as compared with foams made from conventional polyols alone.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.