Polyether polyols, polyester polyols and polyurethanes of low residual aldehyde content
US7879928B2 · kind B2 · utility
10Cited by
4References
6Claims
0Family size
Assignee
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Key dates
| Filing date | Apr 11, 2006 |
| Grant date | Feb 1, 2011 |
| Priority date | — |
| Expiry date | Jul 3, 2026 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L75/04
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention describes a process for preventing the formation of aldehydic contaminants in polyether polyols, polyester polyols or polyurethanes which comprises incorporating into said polyether polyols, polyester polyols or polyurethanes an effective amount of a) a phenolic antioxidant, b) one or more compounds selected from (i) aminic antioxidants, (ii) benzofuran-2-ones, and (iii) phosphites or phosphonites, or (iv) mixtures thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.