Methods for preparing stable urea formaldehyde polyvinyl alcohol colloids
US9217046B1 · kind B1 · utility
0Cited by
8References
17Claims
0Family size
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Key dates
| Filing date | Jul 24, 2014 |
| Grant date | Dec 22, 2015 |
| Priority date | — |
| Expiry date | Jul 24, 2034 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2312/04
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The mechanical properties of urea formaldehyde resins may be improved by incorporating therein polyvinyl alcohol. The polyvinyl alcohol may be incorporated during pre-mixing, mid mixing, and/or post mixing of the resin components. Resins prepared using polyvinyl alcohol are particularly desirable in articles requiring improved mechanical strength and water resistance, as compared to similar resins prepared without the polyvinyl alcohol such as shingles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.