Low odor chain transfer agents for controlled radical polymerization
AssigneeRensselaer Polytechnic Institute
InventorsBrian Benicewicz, Chunzhao Li
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Abstract
The present invention relates to low odor α-cyano-dithiocarboxylic ester compounds of formula I for use as chain transfer agents in free radical polymerizations, and polymerization processes employing them: wherein R1 is selected from alkyl, substituted alkyl, heteroaryl, substituted heteroaryl, alkylaryl, substituted alkylaryl, aryl, substituted aryl, alkoxy, aryloxy, thioalkyl, thioaryl, substituted thioalkyl, substituted thioaryl, secondary amino and tertiary amino; R2 is selected from alkyl, aryl, substituted aryl, heteroaryl, substituted heteroaryl, and COOR3; and R3 is alkyl.
Claims14
A polymerization process comprising
- a. combining:
- at least one chain transfer agent of formula I,
- at least one monomer susceptible to free radical polymerization, and
- a free radical initiator, and;
- b. generating free radicals;
- wherein
- R1 is selected from aryl, substituted aryl, alkoxy, and tertiary amino;
- and
- R2 is aryl
- whereby a polymer, comprising repeating units derived from said at least one monomer, is formed.
A compound of formula II
- wherein
- R11 is aryl or substituted aryl;
- and
- R2 is aryl.
Dependencies are inferred from the claim text.