Branched alkyl methacrylate monomers

Purification, branched alkyl methacrylate monomers, 263 Pyridine... 

Lubrizol, India has reported [22] a process for the synthesis of an additive for mineral oils. The additive was snythesized by copolymerization of an alkyl methacrylate monomer and a Cs-i2 branched-chain methacrylate such as isodecyl methacrylate using an azo initiation in a hydrocarbon solvent at 50-100°C. This concentrate was further reacted with diethylenetriamine to obtain a multifunctional nitrogen-containing lubricant. Similar nitrogen-containing dispersant VI improvers based on alkyl acrylates or methacrylates for lubricating oils were also prepared by Lubrizol, USA [23]. 

It is of some interest that Moritz and Meyerhoff 196) have found from measurements of and [17] in a theta solvent that polyfdodecyl methacrylate) was extensively branched, having one branch for 3-4000 monomer units this is presumably attributable to the large number of hydrogen atoms in the long alkyl groups. 

---