Method of preparing stable condensation products using a water-alkylene oxide treatment and products therefrom
US3959414A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 28, 1974 |
| Grant date | May 25, 1976 |
| Priority date | — |
| Expiry date | May 28, 1994 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2485/00
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Products which are phosphorus containing oligomers having ##EQU1## linkages between phosphorus atoms and which are obtained by the self-condensation of .beta.-haloalkyl esters of pentavalent phosphorus acids or the condensation of these esters with alkyl esters of a pentavalent phosphorus acid are treated after residual acidity has been neutralized, e.g., with an alkylene oxide, with water and then with an alkylene oxide for a period of time which is sufficient to enable the water to open labile groups contained in the product and the alkylene oxide to neutralize any further acidity generated by the opening of such groups. The stabilized product formed by this process when incorporated to a polyurethane foam gives a foam having superior green strength to a polyurethane foam which is not treated in accordance with the invention.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.