DEMULSIFIERS FOR OIL SOLUBLE POLYALKYLENE GLYCOL LUBRICANTS

摘要

A composition contains a propylene oxide/butylene oxide copolymer with an ethylene oxide/propylene oxide copolymer where the propylene oxide/butylene oxide copolymer has a concentration of propylene oxide moieties in a range of 25-75 wt% based on total of propylene oxide and butylene oxide moieties, the ethylene oxide/propylene oxide copolymer has a concentration of ethylene oxide moieties that is greater than zero and up to 60 wt% based on the total weight of ethylene oxide and propylene oxide moieties, and wherein the concentration of the ethylene oxide/propylene oxide copolymer is greater than zero and one wt% or less based on the total weight of propylene oxide/butylene oxide and ethylene oxide/propylene oxide copolymers and the ethylene oxide/propylene oxide copolymer is a reverse copolymer or a random copolymer.