Patent ID: 6566549
Filing Date: 2003-05-20
Classification: C07C,C08F,C08K,C08L,C11D

Abstract:
A process for forming oligomers, comprising the steps of:(1) forming a reaction mixture, substantially free of solvent and carboxylic acid-monomers and their salts, comprising: (i) 0.5 to 99.95% by weight, based on the weight of said reaction mixture, of at least one ethylenically-unsaturated monomer; and (ii) 0.05 to 25% by weight, based on the weight of said ethylenically-unsaturated monomer, of at least one free-radical initiator; and (2) continuously passing said reaction mixture through a heated zone wherein said reaction mixture is maintained at a temperature of at least 150Â° C. and a pressure of at least 30 bars for from 0.1 seconds to 4 minutes to form terminally-unsaturated oligomers, wherein the reaction is conducted in a tubular reactor having no moving parts.