TY - PAT
T1 - Preparing stable polymeric particles comprising block copolymer, involves mixing a polymer with monomers in a non-polar solvent-based medium, and initiating reversible addition-fragmentation chain transfer polymerization
A2 - Armes, S P
A2 - Fielding, L
A2 - Derry, M
PY - 2014/4/3
Y1 - 2014/4/3
N2 - NOVELTY - Preparing colloidally stable polymeric particles (in situ within a non-polar solvent-based medium) comprising a block copolymer (B), comprises: mixing, in a non-polar solvent-based medium, (a) a polymer (A) that is soluble in the non-polar solvent-based medium with (b) monomer(s) (M2); and initiating a reversible addition-fragmentation chain transfer (RAFT) polymerization. USE - The colloidally stable polymeric particle is useful as a lubricant (e.g. a boundary lubricant for engine oils), nanoreactor, microcapsule, coating agent, lubricating agent, binding agent, viscosity modifier, delivery agent, an emulsifier, a gelation agent or medium (claimed). ADVANTAGE - The method provides colloidally stable polymeric particles with high yield in a commercially viable manner. DETAILED DESCRIPTION - Preparing colloidally stable polymeric particles (in situ within a non-polar solvent-based medium) comprising a block copolymer of formula ((P1)-(P2)) (B), comprises: mixing, in a non-polar solvent-based medium, (a) a polymer of formula ((P1)-(X)) (A) that is soluble in the non-polar solvent-based medium with (b) monomer(s) having a structure of formula (M2); and initiating a reversible addition-fragmentation chain transfer (RAFT) polymerization, to provide the block copolymer (B).P1 = a polymeric component that is soluble in the non-polar solvent-based medium;P2 = a polymeric component that is substantially insoluble in the non-polar solvent-based medium, where P2 is derived from a monomer M2 that is soluble in the non-polar solvent-based medium;X = a terminal group of P1, where at least some of the X groups is a chain transfer agent (CTA) terminal group;R3 = a substituent of (M2) which allows P2 to be substantially insoluble in the non polar solvent-based medium, preferably benzyl; andR4 = H or methyl, where the non-polar solvent-based medium has a dielectric constant of less than or equal to 15.INDEPENDENT CLAIMS are included for:(1) the colloidally stable polymeric particle obtainable by the method as above per se; and(2) a composition comprising the colloidally stable polymeric particles.
AB - NOVELTY - Preparing colloidally stable polymeric particles (in situ within a non-polar solvent-based medium) comprising a block copolymer (B), comprises: mixing, in a non-polar solvent-based medium, (a) a polymer (A) that is soluble in the non-polar solvent-based medium with (b) monomer(s) (M2); and initiating a reversible addition-fragmentation chain transfer (RAFT) polymerization. USE - The colloidally stable polymeric particle is useful as a lubricant (e.g. a boundary lubricant for engine oils), nanoreactor, microcapsule, coating agent, lubricating agent, binding agent, viscosity modifier, delivery agent, an emulsifier, a gelation agent or medium (claimed). ADVANTAGE - The method provides colloidally stable polymeric particles with high yield in a commercially viable manner. DETAILED DESCRIPTION - Preparing colloidally stable polymeric particles (in situ within a non-polar solvent-based medium) comprising a block copolymer of formula ((P1)-(P2)) (B), comprises: mixing, in a non-polar solvent-based medium, (a) a polymer of formula ((P1)-(X)) (A) that is soluble in the non-polar solvent-based medium with (b) monomer(s) having a structure of formula (M2); and initiating a reversible addition-fragmentation chain transfer (RAFT) polymerization, to provide the block copolymer (B).P1 = a polymeric component that is soluble in the non-polar solvent-based medium;P2 = a polymeric component that is substantially insoluble in the non-polar solvent-based medium, where P2 is derived from a monomer M2 that is soluble in the non-polar solvent-based medium;X = a terminal group of P1, where at least some of the X groups is a chain transfer agent (CTA) terminal group;R3 = a substituent of (M2) which allows P2 to be substantially insoluble in the non polar solvent-based medium, preferably benzyl; andR4 = H or methyl, where the non-polar solvent-based medium has a dielectric constant of less than or equal to 15.INDEPENDENT CLAIMS are included for:(1) the colloidally stable polymeric particle obtainable by the method as above per se; and(2) a composition comprising the colloidally stable polymeric particles.
M3 - Patent
M1 - WO2014049363-A1
ER -