Method for producing a low viscosity spray polyol by reacting an alkylene oxide with the reaction product of a phenol, an amine and a smaller formaldehyde portion
US4383102A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 29, 1982 |
| Grant date | May 10, 1983 |
| Priority date | — |
| Expiry date | Jan 29, 2002 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G2150/60
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
An improved method for the production of polyols useful in the application of sprayed high density polyurethane foams is described. The improvement involves varying the formaldehyde to phenol mole ratio to range between 1.25:1 to 1.75:1 to produce a polyol with the desired viscosity. Ordinarily such polyols are prepared by reacting 4.65 to 5 moles of propylene oxide with 1 mole of the Mannich reaction product of a mole of phenol or nonylphenol with 1 or 2 moles of diethanolamine and 1 or 2 moles of formaldehyde. It is particularly surprising that such changes in the formulation may be made without adversely affecting the resultant properties of the spray foam.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.