Polyvinyl ester dispersions, process for preparation thereof and use thereof
US8993668B2 · kind B2 · utility
2Cited by
41References
17Claims
0Family size
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Key dates
| Filing date | Jul 15, 2008 |
| Grant date | Mar 31, 2015 |
| Priority date | — |
| Expiry date | Aug 16, 2029 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F230/085
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
What are described are polyvinyl ester dispersions which are prepared in a multistage process and have a low content of polymerized acids or acid anhydrides. They can be obtained by a multistage process in which a polyvinyl ester dispersion is obtained in a first stage, monomers in dissolved or pure form are added to the reaction mixture in a second stage and then the polymerization is started again. The polymer dispersions obtained in this way are notable for a low coagulum content and for increased tensile strengths of the films formed therefrom.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.