Process for preparing liquid overbased metal carboxylates, mixed metal stabilizers containing same, and stabilized halogen-containing polymers therewith
AssigneeHammond Group, Inc.
InventorsEric V. Farone, Benjamin P. Labovitz, Nicholas A. Kruse
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Abstract
Liquid overbased alkali or alkaline earth metal carboxylates, particularly barium carboxylates, are prepared by a process which includes the use of a beta diketone as a reaction promoter during carbonation. Mixed metal stabilizers containing the overbased metal carboxylates are used as stabilizers for halogen-containing polymers such as polyvinyl chloride (PVC).
Claims23
A process for preparing a shelf-stable liquid overbased alkali or alkaline earth metal salt comprising:
- reacting a mixture of an alkali or alkaline earth metal base and a carboxylic acid with an equivalent ratio of metal base to carboxylic acid being greater than 1:1 in the presence of liquid hydrocarbon, and
- carbonating the reaction mixture in the presence of a 1,3-diketone to produce a storage-stable overbased alkali or alkaline earth metal salt.
The process of claim 8 wherein the overbased salt is a barium oleate/ketonate/carbonate.
The process of claim 11 wherein the amount of alkali or alkaline earth metal in the salt is about 25% to about 40% by weight.
A process for preparing a storage-stable liquid overbased barium salt free from any phenol or phenolic derivative comprising
- reacting a barium base and a carboxylic acid with an equivalent ratio of barium base to carboxylic acid being greater than 1:1 in the presence of liquid hydrocarbon,
- carbonating the reaction in the presence of a 1,3-diketone, and
- removing water from the reaction product to provide a storage-stable liquid overbased barium carboxylate/1,3-diketonate/carbonate.
Dependencies are inferred from the claim text.