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US 6,596,899 B1Granted
S,s′bis-(α, α′-disubstituted-α″-acetic acid)- trithiocarbonates and derivatives as initiator-chain transfer agent-terminator for controlled radical polymerizations and the process for making the same
AssigneeNoveon IP Holdings Corp.
InventorJohn T. Lai
Life of this patent
Estimating the term…
Abstract
A s,s′-bis-(α,α′-disubstituted-α″-acetic acid)-trithiocarbonatte and derivatives thereof can be used as an initiator, chain transfer agent, or terminator for polymerization of monomers such as free radical polymerizable monomers. Homopolymers, copolymers, and the like as well as block copolymers can be made utilizing the trithio carbonate compound such as in a living free radical polymerization as well as to form telechelic polymers.
Claims3
A compound having the formula
- wherein R1 and R2, independently, is an alkyl having from 1 to about 6 carbon atoms, or a substituted C1 to about C6 alkyl having one or more substituents, or one or more aryls, or a substituted aryl having from 1 to 6 substituents on the aryl ring;
- wherein said one or more substituents, independently, comprise an alkyl having from 1 to 6 carbon atoms, or an aryl, or a halogen which can be the same or different, or a cyano, or an ether having a total of from 2 to about 20 carbon atoms, or a nitro, or combinations thereof;
- or wherein R1 and R2 are part of a cyclic ring having from about 5 to about 12 total carbon atoms.
Dependencies are inferred from the claim text.