Aqueous polyester emulsions for the production of open-pore coatings

Claim 1

A monomer-free aqueous emulsion comprising A. 10 to 90% by weight of a mixture of α,β-ethylenically unsaturated polyesters, B. 9.95 to 83% by weight of water, C. 0.05 to 2% by weight of a paraffin wax sealing agent having a melting point of 35° to 100° C. and, D. 0 to 5% by weight of a thickener, the percentages by weight, being based on the sum of components A, B, C and D and the polyester mixture A containing (a) 50 to 95% by weight, based on the sum of (a) and (b), of at least one α,β-ethylenically unsaturated polyester which contains per 100 g of polyester (a) from 0.2 to 0.8 moles of β,γ-ethylenically unsaturated ether groups, but which is free of co-condensed polyalkylene glycol residues having molecular weights of 250-2,000, and (b) 5 to 50% by weight, based on the sum of (a) and (b), of at least one α,β-ethylenically unsaturated polyester of which from 25 to 90% by weight, based on (b), consists of co-condensed polyalkylene glycol residues having a molecular weight of from 250 to 2,000 and which contains per 100 g of polyester (b) from 0.4 to 0.5 mole of β,γ-ethylenically unsaturated ether groups.