Patent ID: 7030282

Claim:
A storing and/or transferring method of a polyalkylene glycol ether monomer which comprises storing and/or transferring a polyalkylene glycol monomer in the form of an aqueous solution, wherein POV of the polyalkylene glycol monomer is at a level not higher than 2, and wherein said polyalkylene glycol ether monomer comprises a monomer represented by the following general formula (1): in the formula, R 1 and R 4 are the same or different and each represents a hydrogen atom or a hydrocarbon group containing 1 to 30 carbon atoms; R 2 represents —CH 2 —, —(CH 2 ) 2 — or —C(CH 3 ) 2 —; R 3 O are the same or different and each represents an oxyalkylene group containing 2 to 18 carbon atoms; and m represents the average number of moles of the oxyalkylene group represented by R 3 O as added and is a number of 15 to 300.