Patent ID: 6956018

Claim:
A polymerizable polyoxyalkylene monoalkyl ether derivative prepared by using a polyoxyalkylene monoalkyl ether represented by formula [1] as a raw material: R 1 O(AO) n H [1] wherein R 1 represents a hydrocarbon group having 1 to 18 carbon atoms, AO represents an oxyalkylene group having 2 to 4 carbon atoms, n represents an average number of addition of the oxyalkylene group which is 5 to 500, a plurality of AO may represent the same type of oxyalkylene group or different types of oxyalkylene groups and, when the plurality of AO represent different types of oxyalkylene groups; the different types of oxyalkylene groups may be arranged randomly or in blocks, wherein a chromatogram of the polyoxyalkylene monoalkyl ether obtained in accordance with gel permeation chromatography which exhibits a relation between an intensity of a refractive index obtained by a differential refractometer and an elution time satisfies a relation expressed by equation (A): S 1 /S 0 ≦0.15 (A) wherein S 1 represents an area under a portion of the chromatogram from start of elution to an earliest elution time when the intensity of a refractive index has a value of L/3, L representing a shortest distance between a greatest maximum point of the intensity of a refractive index and a base line, and S 0 represents an area under a portion of the chromatogram from start of elution to an elution time when the intensity of a refractive index has the greatest maximum value, wherein said polymerizable polyoxyalkylene monoalkyl ether derivative is represented by formula [3]: R 1 O(AO) n R 3 [3] wherein R1, AO and n are as defined above, and R3 represents acryloyl group or methacryloyl group.