Polyols useful for preparing water blown rigid polyurethane foam
US6281393A · kind A · utility
9Cited by
38References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 3, 1999 |
| Grant date | Aug 28, 2001 |
| Priority date | — |
| Expiry date | Sep 3, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G2110/0083
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Mannich polyols having a viscosity of from 300 to 3,500 cps (0.3 to 3.5 Pa*s) at 25.degree. C. are prepared by admixing a phenol, an alkanolamines, and formaldehyde mixed in molar ratios of from 1:1:1 to 1:2.2:2.2 resulting in an initiator which can be alkoxylated using a mixture of ethylene oxide and propylene oxide to prepare polyols that have a nominal functionality of from 3 to 5.4.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.