Preparation of lactone polyesters
AssigneeStamicarbon B.V.
InventorLowhardt A. A. Schoen
Life of this patent
Estimating the term…
Abstract
An improved process for polymerization of lactones or mixtures of lactones in the presence of an initiator and a catalyst is disclosed wherein the initiator is an organic compound having at least one non-cyclic ester group and having no reactive hydrogen substituents. A polyester having blocked end groups is produced.
Claims15
A process for preparing polymeric lactones free of terminal reactive hydrogen substituents comprising polymerizing a polymerizable lactone with an initiator and in the presence of a catalyst, said initiator selected from the group consisting of ethyl acetate, propyl acetate, butyl acetate, 2-ethyl-hexyl acetate, ethyl benzoate, ethylene glycol diacetate, ethylene glycol dipropionate, ethylene glycol dibutyrate, ethylene glycol dibenzoate, diethylene glycol diacetate, diethylene glycol diproprionate, diethylene glycol dibutyrate, diethylene glycol dibenzoate, dimethyl terephthalate, di-(2-ethyl-hexyl)-adipate, diethyl adipate, dipropyl adipate, dibutyl adipate, dibenzyl adipate, triethylene glycol diacetate, triethylene glycol dipropionate, triethylene glycol dibutyrate and triethylene glycol dibenzoate.
Dependencies are inferred from the claim text.