Process for stabilizing phenolic resins containing calixarenes
AssigneeSi Group, Inc.
InventorsTodd AUBE, Gennaro BARBIERO, Ricky BIITTIG, James M. BAXTER, JR.
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Abstract
This invention relates to a process for stabilizing a phenolic resin containing a mixture of linear phenolic resins and calixarenes and a demulsifier composition comprising the stabilized phenolic resins prepared from the process. The process comprises contacting the phenolic resin with an alkylene carbonate, in the presence of a base catalyst, to at least partially alkoxylate the phenolic hydroxyl groups of the calixarenes. This process forms a stabilized phenolic resin with an increased solubility in a hydrocarbon solvent.
Claims20
A process for stabilizing a phenolic resin containing a mixture of linear phenolic resins and calixarenes, comprising:
- contacting the phenolic resin with an alkylene carbonate, in the presence of a base catalyst, to at least partially alkoxylate the phenolic hydroxyl groups of the calixarenes, thereby forming a stabilized phenolic resin mixture,
- wherein about 0.2 to 1 mole of alkylene carbonate reacts with the phenolic hydroxyl groups for each mole of the phenolic resin.
A process for stabilizing a phenolic resin containing a mixture of linear phenolic resins and calixarenes, comprising:
- contacting the phenolic resin with an alkylene carbonate, in the presence of a base catalyst and a hydrocarbon solvent, to at least partially alkoxylate the phenolic hydroxyl groups of the calixarenes, thereby forming a stabilized phenolic resin mixture,
- wherein less than 10% of the calixarenes precipitate out of the solvent after 24 hours.
A process for increasing the solubility of a linear phenolic resin/calixarene mixture, comprising:
- contacting a phenolic resin containing a mixture of linear phenolic resins and calixarenes with an alkylene carbonate, in the presence of a base catalyst, to at least partially alkoxylate the phenolic hydroxyl groups of the calixarenes,
- wherein the solubility of the linear phenolic resin/calixarene mixture in a hydrocarbon solvent is increased by at least 50%.
Dependencies are inferred from the claim text.