Methods for preparing stable urea formaldehyde polyvinyl alcohol colloids
US9499672B2 · kind B2 · utility
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8Claims
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Key dates
| Filing date | Nov 17, 2015 |
| Grant date | Nov 22, 2016 |
| Priority date | — |
| Expiry date | Nov 17, 2035 |
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.