Method to prevent deactivation of metal catalysts in catalytic polymerisation processes
AssigneeJanssen Pharmaceutica NV
InventorKurt Mark Anthony De Meyer
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Abstract
The present invention relates to a method to prevent deactivation of the metal catalyst in a catalytic polymerisation process of polymeric binders whereby pyrithione biocides are present which method comprises the addition of a Zn, Cu or Na salt selected from Zn, Cu or Na salts of fatty acids such as e.g. Zn, Cu or Na octoate, Zn, Cu or Na acrylate, Zn, Cu or Na neodecanoate, or Zn, Cu or Na salts of beta diketones such as e.g. Zn, Cu or Na acetylacetonate.
Claims15
A method to prevent deactivation of a metal catalyst in a catalytic polymerisation process of polymeric binders whereby pyrithione biocides selected from zinc pyrithione, copper pyrithione, and sodium pyrithione, are present characterized by the addition of a suitable Zn, Cu or Na salt selected from Zn, Cu or Na salts of fatty acids or Zn, Cu or Na salts of beta diketones;
- whereby the Zn, Cu or Na salt is added in an amount of at least a 0.1:1 weight ratio of Zn, Cu or Na salt to pyrithione biocide.
The method according to any one of the preceding claims wherein the pyrithione biocide is zinc pyrithione.
Dependencies are inferred from the claim text.