Synthesis of 2,3,3,3-tetrafluoropropene/vinylidene fluoride copolymers
AssigneeHoneywell International Inc.
InventorsChangqing Lu, Andrew J. Poss, Rajiv R. Singh, David Nalewajek, Cheryl Cantlon
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Abstract
In accordance with the present invention, aqueous emulsion polymerization processes of synthesizing 2,3,3,3-tetrafluoropropene/vinylidene fluoride copolymers having 2,3,3,3-tetrafluoropropene as the major monomer unit are provided.
Claims16
A process of synthesizing a 2,3,3,3-tetrafluoropropene/vinylidene fluoride copolymer having 2,3,3,3-tetrafluoropropene as a major monomer unit, the process comprising the step of conducting an aqueous emulsion copolymerization of monomers in the presence of a water soluble radical initiator to form the 2,3,3,3-tetrafluoropropene/vinylidene fluoride copolymer having 2,3,3,3-tetrafluoropropene as the major monomer unit, wherein the copolymerization is carried out at a temperature from 55° C. to 70° C.
A process of synthesizing a 2,3,3,3-tetrafluoropropene/vinylidene fluoride copolymer having 2,3,3,3-tetrafluoropropene as a major monomer unit, the process comprising the step of conducting an aqueous emulsion copolymerization of monomers in the presence of a water soluble radical initiator to form the 2,3,3,3-tetrafluoropropene/vinylidene fluoride copolymer having 2,3,3,3-tetrafluoropropene as the major monomer unit, wherein the water soluble radical initiator is added into the copolymerization at multiple times.
Dependencies are inferred from the claim text.