USE OF CATALYST SYSTEM FOR (CO) Russian patent published in 2010 - IPC C08G63/08 C08G63/82 C08G63/87 B01J31/10 

FIELD: chemistry.

SUBSTANCE: description is given of use of a catalyst system for (co)oligomerisation of lactide or glycolide with ring opening. The catalyst system is formed by a polymer catalyst based on a strongly acidic ion-exchange resin (1) and a (co)oligomerisation additive of formula (2) R¹-E-R², in which E is an element of the 16^th group, R¹ is a hydrogen or deuterium atom, R2 is a hydrogen or deuterium atom or a group in formula - E₁₄(R₁₄)(R'₁₄)(R"₁₄), where E₁₄ is an element of the 14^th group, R₁₄, R'₁₄, R"₁₄ - represent a hydrogen atom, a deuterium atom, substituted or unsubstituted alkyl, cycloalkyl or aryl.

EFFECT: proposed catalyst system allows for controlling chain length and nature of terminal groups of compounds, separate compounds from a catalyst using a simple and efficient method and prevent loss of catalyst activity.

14 cl, 8 ex