Oligomeric formal diols of poly(tetramethylene ether) glycol and polyurethanes prepared therefrom
US4355119A · kind A · utility
4Cited by
3References
4Claims
0Family size
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Inventor
Key dates
| Filing date | Nov 6, 1981 |
| Grant date | Oct 19, 1982 |
| Priority date | — |
| Expiry date | Nov 6, 2001 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G4/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Oligomeric formal diols are prepared by coupling segments of PTMEG, each having a molecular weight of 1000-3000, with formaldehyde. The formal diols are useful in preparing polyurethanes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.