The feasibility of the concept has been demonstrated:
A swelling acrylic polymer has been developed, optimized and manufactured at an industrial scale.
A mild chemical stripper has been developed for both softening and stripping actions. It has to be improved for wettability, gel and stability properties.
An intermediate paint containing the acrylic polymer has been developed. The incorporation of the acrylic polymer was a very difficult work which required to develop new approaches in paint polymer incorporation in terms of wettability, solubility and dispersion.
The intermediate coat is not fully industrial because of stability and sprayability problems.
Two paint schemes have been developed to demonstrate the feasibility of the concept, one on metal and the other on composite scheme.
The scheme for metal does not meet all the requirements of the NT 10 028 specification, but the scheme for composite passes totally the NT 10 028.
The stripping results on the metal are not fully satisfying. The overcoating time between refreshing primer and intermediate coat has been identified as being a major parameter in the swelling process. This scheme has to be optimized.
On balance the stripping results obtained with the composite part are very encouraging. They bring a new way in paint stripping of composite parts without damages.
Funding SchemeCSC - Cost-sharing contracts
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15771 Zographos, Athens