Surface-active pereoxides and their use
AssigneeBayer Aktiengesellschaft
InventorsMartin Bohnenpoll, Adolf Schmidt, Heinrich Alberts
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Abstract
The present invention relates to surface-active peroxides which can be employed as emulsifying initiators for the preparation of low-electrolyte polymer dispersions having a low tendency to foam.
Claims5
A peroxide of the formula ##STR3## wherein R.sup.1 denotes alkyl or cycloalkyl having 4 to 20 carbon atoms, and aryl radicals having 6 to 20 carbon atoms,
- X denotes the radicals --COOH and --SO.sub.3 H and alkali metal, alkaline earth metal or ammonium salts thereof,
- n denotes an integer in the range from 1 to 6, and wherein the radical A is corresponding to the formula (II) ##STR4## wherein the radicals R.sup.2 and R.sup.3 represent H, C.sub.1 -C.sub.40 -alkyl, C.sub.3 -C.sub.40 -cycloalkyl, aryl, aralkyl or halogen, with the limitation that the sum of the carbon atoms in the two radicals is greater than 16.
A rocess for emulsion polymerization of olefinically unsaturated monomers which comprises adding a peroxide of the formula ##STR5## wherein R.sup.1 denotes alkyl or cycloalkyl having 4 to 20 carbon atoms, and aryl radicals having 6 to 20 carbon atoms,
- X denotes the radicals --COOH and --SO.sub.3 H and alkali metal, alkaline earth metal or ammonium salts thereof,
- n denotes an integer in the range from 1 to 6, and wherein the radical A is corresponding to the formula (II) ##STR6## wherein the radicals R.sup.2 and R.sup.3 represent H, C.sub.1 -C.sub.40 -alkyl, C.sub.3 -C.sub.40 -cycloalkyl, aryl, aralkyl or halogen, with the limitation that the sum of the carbon atoms in the two radicals is greater than 16, to at least one olefinically unsaturated monomer.
Dependencies are inferred from the claim text.