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
View Patent ↗A s,s′-bis-(α,α′-disubstituted-α″-acetic acid)-trithiocarbonate 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.
1. A composition comprising a free radically polymerizable monomer selected from a conjugated diene monomer, a vinyl monomer, and combinations thereof; and a compound having the formula:
wherein R 1 and R 2 , independently, are selected from a substituted and unsubstituted alkyl having from 1 to about 6 carbon atoms, and substituted and unsubstituted aryl; wherein said substituents, independently, are selected from an alkyl having from 1 to 6 carbon atoms, aryl, halogen, cyano, an ether having a total of 2 to 20 carbon atoms, nitro, and combinations thereof; or wherein R 1 and R 2 are part of a cyclic ring having from about 5 to about 12 total carbon atoms; and wherein E is XR′, where R′, independently, is selected from hydrogen, C 1 -C 18 alkyl, substituted C 1 -C 18 alkyl, wherein said substituent is selected from halogen, hydroxyl, alkoxy, C 1 -C 18 hydroxyalkyl, C 1 -C 18 aminoalkyl, and X is selected from oxygen, sulfur, NH, and NR′, where R′is defined above; or wherein E is
wherein R 6 R 7 , R 8 , and R 9 , independently, are selected from hydrogen, C 1 -C 18 alkyl, substituted and substituted aryl, wherein said substituent is selected from halogen, hydroxyl, alkoxy, C 1 -C 18 hydroxy alkyl, C 1 -C 18 amino alkyl, and C 1 -C 18 mercapto alkyl, and wherein Y is selected from oxygen, sulfur, NH, NR 6 , NR 7 , NR 8 , and NR 9 ; or wherein, E is OR 10 where R 10 is selected from a substituted and unsubstituted alkyl having from 1 to 18 carbon atoms, wherein said substituent is selected from halogen, hydroxyl, alkoxy, hydroxy alkyl having from 1 to 18 carbon atoms, amino alkyl having from 1 to 18 carbon atoms, and combinations thereof.
2. The composition of claim 1 , wherein in said compound R 1 and R 2 are, independently, selected from said substituted and unsubstituted alkyl said substituted and unsubstituted aryl, and combinations thereof.
3. A composition comprising a free radically polymerizable monomer selected from a conjugated diene monomer, a vinyl monomer, and combinations thereof; and compound of the formula:
wherein R 11 is benzyl, a substituted and unsubstituted C 1 through C 18 alkyl, wherein said substituent, independently, is selected from halogen, hydroxyl, alkoxy, C 1 to C 18 hydroxyalkyl, C 1 to C 18 alkyl carboxyl, and C 1 to C 18 alkylcarboalkoxy, and wherein R 1 and R 2 , independently, are selected from a substituted and unsubstituted alkyl having from 1 to about 6 carbon atoms, substituted and unsubstituted aryl; wherein said substituents, independently, are selected from alkyl having from 1 to 6 carbon atoms, aryl, halogen, cyano, an ether having a total of 2 to 20 carbon atoms, nitro, and combinations thereof; or wherein R 1 and R 2 are part of a cyclic ring having from about 5 to about 12 total carbon atoms.
4. The composition of claim 1 wherein said conjugated diene monomer has 4 to about 12 carbon atoms; and wherein said vinyl monomer is represented by the formula:
wherein R 3 is selected from hydrogen, halogen, substituted and unsubstituted C 1 -C 4 alkyl, wherein said substituents, independently, are selected from hydroxy, alkoxy, aryloxy(OR 5 ), carboxy, acyloxy, aroyloxy(O 2 CR 5 ); alkoxy-carbonyl(CO 2 R 5 ), and aryloxy-carbonyl; N-pyrrolidonyl; wherein R 4 is selected from hydrogen, R 5 , CO 2 H, CO 2 R 5 , COR 5 , CN, CONH 2 , CONHR 5 , O 2 CR 5 OR 5 and halogen; and wherein R 5 is selected from substituted and unsubstituted C 1 -C 18 alkyl, C 2 -C 18 alkenyl, aryl, aralkyl, and alkaryl, and wherein said substituents, independently, are selected from epoxy, hydroxy, alkoxy, acyl, acyloxy, carboxy and salts thereof, sulfonic acid and salts thereof; alkoxy- or aryloxy-carbonyl, dicyanato, cyano, silyl, halo and dialkylamino.
5. The composition of claim 3 wherein said conjugated diene monomer has 4 to about 12 carbon atoms; and wherein said vinyl monomer is represented by the formula:
wherein R 3 is selected from hydrogen, halogen, substituted and unsubstituted C 1 -C 4 alkyl, wherein said substituents, independently, are selected from hydroxy, alkoxy, aryloxy(OR 5 ), carboxy, acyloxy, aroyloxy(O 2 CR 5 ), alkoxy-carbonyl(CO 2 R 5 ), and aryloxy-carbonyl;
N-pyrrolidonyl; wherein R 4 is selected from hydrogen, R 5 , CO 2 H, CO 2 R 5 , COR 5 , CN, CONH 2 CONHR 40 , O 2 CR 5 , OR 5 and halogen; and wherein R 5 is selected from substituted and unsubstituted C 1 -C 18 alkyl, C 2 -C 18 alkenyl, aryl, aralkyl, and alkaryl, and wherein said substituents, independently, are selected from epoxy, hydroxy, alkoxy, acyl, acyloxy, carboxy and salts thereof, sulfonic acid and salts thereof, alkoxy- or aryloxy-carbonyl, dicyanato, cyano, silyl, halo and dialkylamino.