METHOD OF CONTROLLING MOLECULAR WEIGHT DISTRIBUTION IN POLYMERS Russian patent published in 1998 - IPC

FIELD: polymer production. SUBSTANCE: method is accomplished by using dependence of polymerization degree on parameters of free- radical polymerization and controlling concentration of initiator with regard to monomer and in dependence of time. Narrow molecular- weight distribution is ensured to achieve nearly constant polymerization degree. Method is also applicable in half-periodical and half-continuous mode operation, especially in acrylate and methacrylate copolymer production. EFFECT: improved homogeneity of product. 30 cl, 4 tbl, 6 ex