Patent ID: 8344085
Filing Date: 2013-01-01
Classification: C04B,C08F,C08L

Abstract:
1. A polymer comprising: a first polyalkylene glycol chain and a polymer segment including constituent units respectively derived from unsaturated monomers, which polymer segment is bonded to one end of the first polyalkylene glycol chain, wherein the unsaturated monomers constituting the polymer segment include an unsaturated carboxylic acid monomer represented by formula (5) wherein R 1 , R 2 and R 3 are each independently hydrogen atom, methyl group, or —(CH 2 ) x COOM 2 (wherein —(CH 2 ) x COOM 2 is able to form an anhydride with —COOM 1 or another —(CH 2 ) x COOM 2 ), x is an integral number from 0 to 2, and M 1 and M 2 are each independently hydrogen atom, monovalent metal atom, bivalent metal atom, trivalent metal atom, quaternary ammonium group, or organic amine group, to provide a carboxyl group in the polymer segment, and an unsaturated polyalkylene glycol monomer represented by formula (6) wherein R 4 , R 5 and R 6 are each independently a hydrogen atom or methyl group, R 7 is a hydrogen atom or hydrocarbon group having 1 to 20 carbon atom, AO is each independently one or more oxyalkylene groups having 2 to 18 carbon atoms (wherein, when more than two oxyalkylene groups are present, the more than two oxyalkylene groups are introduced in block form or random form), y is an integral number from 0 to 2, z is an integral number of 0 or 1, and n is an integral number from 1 to 300 and represents a mean molecular number of added oxyalkylene groups, to provide a second polyalkylene glycol chain in the polymer segment.