Aromatic polyols made from recycled polyethylene terephthalate waste streams, alkylene glycol and dibasic acid waste streams
US4439550A · kind A · utility
29Cited by
12References
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 Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/582
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Mixtures of aromatic polyols containing ester functionalities suitable for use as polyol extenders in rigid foams prepared by reacting dibasic acid residues with an alkylene glycol residue, the reaction product of which is reacted with recycled polyethylene terephthalate are described. Surprisingly, the process is non-catalytic. These novel polyols may be blended with conventional polyols to yield excellent rigid foams, thus serving as useful polyol extenders.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.