Abstract: A process for producing a halogenated isoolefin copolymer involves contacting an unsaturated isoolefin copolymer cement, the cement containing an unsaturated isoolefin copolymer dissolved in an organic solvent, under halogenation conditions with a halogenating agent and an aqueous solution of an organic peracid oxidant to form a two-phase reaction medium having an organic phase and an aqueous phase, the organic peracid oxidant capable of converting hydrogen halide to free halogen. The process leads to higher halogen utilization even when the cement contains significant amounts of water and without the use of an emulsifier.

Abstract: A process for producing a halogenated isoolefin copolymer involves contacting an unsaturated isoolefin copolymer cement, the cement containing an unsaturated isoolefin copolymer dissolved in an organic solvent, under halogenation conditions with a halogenating agent and an aqueous solution of an organic peracid oxidant to form a two-phase reaction medium having an organic phase and an aqueous phase, the organic peracid oxidant capable of converting hydrogen halide to free halogen. The process leads to higher halogen utilization even when the cement contains significant amounts of water and without the use of an emulsifier.

Abstract: A continuous process for producing a halogenated isoolefin copolymer involves: polymerizing at least one isoolefin monomer and at least one copolymerizable unsaturated monomer in an organic diluent to produce a halogenatable isoolefin copolymer in an organic medium; contacting the organic medium with an aqueous medium comprising an LCST anti-agglomerant compound; removing or partially removing the organic diluent to produce an aqueous slurry of the halogenatable isoolefin copolymer; dissolving the aqueous slurry in an organic solvent in a closed apparatus to form an unsaturated halogenatable copolymer cement in water, and phase separating the water from the cement in the apparatus; contacting the separated halogenatable isoolefin copolymer cement with a halogenating agent and an aqueous solution of a C1-20 organic peracid oxidant to form a two-phase reaction medium having an organic phase and an aqueous phase, the organic peracid oxidant capable of converting hydrogen halide to free halogen; and, recovering h

Abstract: A continuous process for producing a halogenated isoolefin copolymer involves: polymerizing at least one isoolefin monomer and at least one copolymerizable unsaturated monomer in an organic diluent to produce a halogenatable isoolefin copolymer in an organic medium; contacting the organic medium with an aqueous medium comprising an LCST anti-agglomerant compound; removing or partially removing the organic diluent to produce an aqueous slurry of the halogenatable isoolefin copolymer; dissolving the aqueous slurry in an organic solvent in a closed apparatus to form an unsaturated halogenatable copolymer cement in water, and phase separating the water from the cement in the apparatus; contacting the separated halogenatable isoolefin copolymer cement with a halogenating agent and an aqueous solution of a C1-20 organic peracid oxidant to form a two-phase reaction medium having an organic phase and an aqueous phase, the organic peracid oxidant capable of converting hydrogen halide to free halogen; and, recovering h

Abstract: A process for producing a halogenated isoolefin copolymer involves contacting an unsaturated isoolefin copolymer cement, the cement containing an unsaturated isoolefin copolymer dissolved in an organic solvent, under halogenation conditions with a halogenating agent and an aqueous solution of an organic peracid oxidant to form a two-phase reaction medium having an organic phase and an aqueous phase, the organic peracid oxidant capable of converting hydrogen halide to free halogen. The process leads to higher halogen utilization even when the cement contains significant amounts of water and without the use of an emulsifier.

Abstract: A process for producing a halogenated isoolefin copolymer involves contacting an unsaturated isoolefin copolymer cement, the cement containing an unsaturated isoolefin copolymer dissolved in an organic solvent, under halogenation conditions with a halogenating agent and an aqueous solution of an organic peracid oxidant to form a two-phase reaction medium having an organic phase and an aqueous phase, the organic peracid oxidant capable of converting hydrogen halide to free halogen. The process leads to higher halogen utilization even when the cement contains significant amounts of water and without the use of an emulsifier.