Storage stable melamine-urea-formaldehyde resins and applications thereof
US8088881B2 · kind B2 · utility
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9References
26Claims
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Key dates
| Filing date | Jun 25, 2008 |
| Grant date | Jan 3, 2012 |
| Priority date | — |
| Expiry date | Dec 16, 2029 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K5/151
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Melamine-urea-formaldehyde resins may be prepared using processes including a first cook stage, a second cook stage, and a final addition wherein: the molar ratio of formaldehyde to urea and melamine (F:U+M) in the first cook stage is from about 2.0 to about 5.0; and the molar ratio of formaldehyde to urea and melamine (F:U+M) in the second cook stage is from about 1.5 to 3.0; and the molar ratio of formaldehyde to urea and melamine (F:U+M) in the final addition from about 0.4 to 0.70.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.