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Waterborne and compliant coating technologies are undergoing
fundamental changes in response to current legislative,
environmental and market driven pressures. The implications of
certain changes could be far-reaching in their consequences to
the coatings industry. This programme was designed specifically
to address the new microbiological risks which may develop as a
result of changes, namely,
- Solvent removal from waterborne coatings
- Monomer reduction by latex end-stripping using redox
agents
- Performance properties of waterborne exterior coatings
Organic solvents are being reduced or eliminated from
waterborne coatings to meet more stringent VOC discharge
requirements etc. Work has shown that some of these solvents act
as antimicrobials and can make significant contribution to
microbial resistance of the paint composition. Additionally,
fundamental changes in overall solvency in waterborne coatings
formulations could have implications for biocide stability and
distribution and also for distribution, mobility and release of
biocides in the applied dry films.
Aqueous emulsions are being 'cleaned up' by reducing and
removing free monomer, to provide low odour products for use in
waterborne coatings. This can be achieved by an end-stripping
process involving additional redox chemicals. It has been shown
that such chemicals in emulsion and slurry systems can cause
substantial biocide deactivation. The fundamental changes
occurring in the liquid formulation are also likely to affect the
dry film properties.
Further Information
If you are interested in this, or any other project, please contact Richard Holman.
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Partners
Industrial Advisory Group
| Code: |
M4R1 |
| Status: |
Completed |
| Duration: |
3 Years |
| Reports: |
All PRA Members |
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