Miniemulsion copolymerization of n-butyl methacrylate with crosslinking monomers

Miniemulsion copolymerization of n-butyl methacrylate and crosslinking mono mers such as a macromonomer crosslinker (Mac), ethylene glycol dimethacryla te (EGDMA), or an aliphatic urethane acrylate macromonomer (AUA) was utiliz ed to obtain crosslinked latex particles. The crosslinking monomers were ad ded at 0.2 mol %, on the basis of the amount of n-butyl methacrylate utiliz ed in a polymerization. The development of the gel content during the copol ymerization reaction differs depending on the type of the crosslinking mono mer. In addition to the crosslinking reactions between the n-butyl methacry late and the crosslinking monomers, other kinetic events, such as microphas e separation, may have occurred, giving rise to different particle morpholo gies, dependent on the type of initiator used (i.e., oil-soluble or water-s oluble). (C) 2001 John Wiley & Sons, Inc.