Functional trithiocarbonate RAFT agents

Details Functional trithiocarbonate RAFT agents Functional trithiocarbonate RAFT agents

2007-06-12

2007-06-12

Teskin, Fred (Department: 1713)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

C526S204000, C526S211000, C526S214000, C526S222000, C526S303100, C526S328000, C526S340000, C526S341000, C526S343000, C526S344000, C558S243000, C562S426000, C562S581000

Reexamination Certificate

active

11583624

ABSTRACT:
The present invention is directed to a free radical control agent of the structural formula:wherein R1is a divalent alkyl group of 1 to 12 carbon atoms, R2and R3are each independently hydrogen or an alkyl group of 1 to 12 carbon atoms, and R4is —OH or —COOH, with the proviso that the total carbon atoms of R1, R2, and R3is no greater than 12; and wherein Y represents a functional group that is capable of activating a vinylic carbon toward free radical addition.

REFERENCES:
patent: 4868322 (1989-09-01), Degani et al.
patent: 6596899 (2003-07-01), Lai
patent: 6998452 (2006-02-01), Parker
patent: 2005/0009999 (2005-01-01), Lai et al.
Liu, et al, Dihydroxyl-terminated telechelic polymers prepared by RAFT polymerization using functional trithiocarbonate as chain transfer agent, Polymer 45 (2004) 4413-4421.
You, et al, Preparation and Characterization of Thermally Responsive and Biodegradable Block Copolymer Comprised of PNIPAAM and PLA by Combination of ROP and RAFT Methods, Macromolecules 2004, 37, 9761-9767.

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