Aromatic polyols made from polyethylene terephthalate scrap, glycols and aromatic carbonyl-containing compounds
US4506090A · kind A · utility
21Cited by
10References
10Claims
0Family size
Assignee
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Key dates
| Filing date | Jul 15, 1983 |
| Grant date | Mar 19, 1985 |
| Priority date | — |
| Expiry date | Jul 15, 2003 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G18/425
- 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 aromatic carbonyl-containing compounds with an alkylene glycol, 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.