Catalyst composition for living free radical polymerization and process for polymerizing (meth)acrylic, vinyl, vinylidene, and diene monomers using the catalyst composition

• Main Authors: CHAO, YU-SHAN, CHEN, LI-JIUN, SHIH, KUON
• Format: Patent
• Language: English
• Published: 21.10.2007
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP

The present invention provides a catalyst composition for living free radical polymerization, which includes: a transition metal complex MXp and a ligand, wherein M is a transition metal; X is halogen, -NCS, -NCO, -SCN, -CN, -N3, -SO4, -PF6, carboxylate or -NO2; p is the valence of the transition metal, the ligand is represented by formula (I): wherein R1 can be the same or different and is C1-20 alkyl, C6-20 aryl, C7-20 alkylaryl, C7-20 arylalkyl, or heterocyclic groups; R2 can be the same or different and is H, C1-20 alkyl, C6-20 aryl, C7-20 alkylaryl, C7-20 arylalkyl, heterocyclic groups, alkyl sulfide groups, nitrile groups, alkylsilyl, or ester groups; n is an integer of 0 to 6; and A is deleted or S or O atom, wherein the molar ratio of the transition metal complex MXp and the ligand is 1 to 4. In the presence of a compound capable of generating free radicals, the catalyst composition of the present invention can be used to polymerize or co-polymerize at least one of the (meth)acrylic, vinyl, vinylidene, and diene monomers, and the polymer obtained has narrow polydispersity.