Polyurethane foams based on amino polyols
US4654376A · kind A · utility
3Cited by
8References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 24, 1985 |
| Grant date | Mar 31, 1987 |
| Priority date | — |
| Expiry date | Oct 24, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S521/902
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
An improved method for preparing amino polyols is disclosed. The method is the Mannich condensation of phenol, formaldehyde and diethanolamine in a molar ratio of (1:1:1), and then alkoxylation with a mixture of ethylene oxide and propylene oxide in a weight ratio of about 5:95 to 20:80 to form an amino polyol of hydroxyl number 440 to 515. The method gives higher yields of aromatic amino polyols of lower viscosity than those of the comparative example.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.