Process to produce disproportionated rosin based emulsifier for emulsion polymerization
AssigneeGeorgia-Pacific Resins, Inc.
InventorJalandar Y. Jadhav
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Abstract
A process for disproportionating rosins using iodide catalysts. In one embodiment, a tall oil rosin is heated in the presence of a lithium iodide catalyst. In another embodiment, a catalyst system is formed from a mixture of lithium iodide and ferrous iodide. The mixed catalyst system completes disproportionation of tall oil rosin in about three hours. Phosphoric acid may be added to remove iron colored impurities when using the mixed catalyst system. Another aspect of the invention involves preparing a soap from the disproportionated rosin by adding a defoamer and a base, such as potassium hydroxide.
Claims24
A process for producing a disproportionated rosin based emulsifier having less than 1 wt % abietic acid, the process comprising heating a rosin in the presence of an effective catalytic amount of a catalyst of lithium iodide.
A process for producing a disproportionated rosin based emulsifier having less than 1 wt % abietic acid, the process comprising heating a rosin in the presence of an effective catalytic amount of a catalyst system, the catalyst system comprising lithium iodide and ferrous iodide.
Dependencies are inferred from the claim text.