Process for preparing liquid overbased metal carboxylates, mixed metal stabilizers containing same, and stabilized halogen-containing polymers therewith
AssigneeAM Stabilizers Corporation
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).
Claims22
A process for preparing a phenol-free storage-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 which acts as a promoter of the reaction during carbonation in the absence of any phenol or phenolic derivative to produce the phenol-free storage-stable liquid overbased alkali or alkaline earth metal salt.
A process for preparing a phenol-free storage-stable liquid overbased barium salt free from any phenol or phenolic derivative comprising
- reacting a barium hydroxide and a carboxylic acid with an equivalent ratio of barium hydroxide to carboxylic acid being greater than 1:1 in the presence of liquid hydrocarbon, carbonating the reaction mixture in the presence of a 1,3-diketone which acts as a promoter of the reaction during carbonation to produce the overbased barium salt and byproduct water in the absence of any phenol or phenolic derivative, and
- removing water from the reaction product to provide the phenol-free storage-stable liquid overbased barium carboxylate/1,3-diketonate/carbonate.
Dependencies are inferred from the claim text.