# US 5,345,018 A · Method for preparing 1-chloro-1-iodoethane

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- Number: US 5,345,018 A
- Document ID: US5345018A
- Status: Granted
- Kind: A
- Application number: 08/035,017
- Filed: 1993-03-22
- Granted: 1994-09-06
- Earliest claimed: 1993-03-22
- Assignees: The Geon Company
- Inventors: Philip L. Bak; Gregory P. Bidinger; Ross J. Cozens; Paul R. Klich
- Web page: https://patentgrep.com/patent/US5345018A

## CPC

- C08F 14/06: Vinyl chloride
- C07C 17/087: to unsaturated halogenated hydrocarbons
- C08F 14/18: Monomers containing fluorine
- C08F 2438/01: Atom Transfer Radical Polymerization [ATRP] or reverse ATRP
- Y02P 20/52: using catalysts, e.g. selective catalysts
- C08F: MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C07C: ACYCLIC OR CARBOCYCLIC COMPOUNDS
- Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS

## Abstract

The present invention relates to a method of synthesizing 1-chloro-1-iodoethane by reacting hydrogen iodide with vinyl chloride monomer in the presence of an iodine containing catalyst under certain specified conditions. The resulting product of the reaction is a high yield, high purity 1-chloro-1-iodoethane. This 1-chloro-1-iodoethane is useful as a chain transfer agent in the polymerization of vinyl chloride monomer in a process which mimics a pseudo-living radical polymerization.

## Claims

### Claim 1

A process for preparing 1-chloro-1-iodoethane comprising combining substantially anhydrous hydrogen iodide and vinyl chloride monomer in the presence of from 0.1 to 2 mole % molecular iodine catalyst at a temperature of from about -75.degree. C. to 100.degree. C.