Process for the production of thinlayer polyester coatings
AssigneeBayer Aktiengesellschaft
InventorsWalter Frank, Otto Bendszus, Hansjoachim Freier, Hans-Joachim Traenckner
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Abstract
Monomer-free aqueous dispersions of air-drying unsaturated polyesters can be hardened to thin coatings in the presence of accelerators, but in the absence of common initiators, if the chemical structure of the polyester meets specific requirements.
Claims6
A process for the production of a thin-layer coating, characterized in that a monomer-free aqueous dispersion of at least one .alpha.,.beta.-ethylenically unsaturated polyester containing from 0.2 to 0.8 mole of .beta.,.gamma.-ethylenically unsaturated ether groups per 100 g of polyester, is polymerized in the presence of an accelerator, but in the absence of a standard external polymerization initiator.
Dependencies are inferred from the claim text.