Flexible polyurethane foams made using an aromatic polyester polyol
US4469823A · kind A · utility
14Cited by
11References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 28, 1983 |
| Grant date | Sep 4, 1984 |
| Priority date | — |
| Expiry date | Jul 28, 2003 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G2110/0083
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A method for producing a flexible polyurethane foam from reacting a polyol blend with a polyisocyanate in the presence of a polyurethane formation catalyst is described. The polyol blend contains from 0.5 to 10 wt. % of an aromatic polyester polyol extender typically used in rigid foams. The polyol extender is made from dibasic acids, alkylene glycols and recycled polyethylene terephthalate. Commercial extenders cause flexible foams to shrink, a problem not found in the foams of this invention.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.