of glycol amine derivatives of norbornene maleic anhydride copolymer in different molar ratios by reacting it with methoxy polyethylene glycol amine with average molecular weight of 2000 the derivatives are in a viscous liquid state put 26 5 units of norbornene maleic anhydride copolymer 1 5 molar ratio average molecular weight of 4500 obtained from example 1 in 100 units of isopropanol add 21 2 units of polyethylene glycol monomethyl ether eo po 3 2 average molecular weight of 750 heat the solution up to 110 u00b0 c conduct the reaction under agitation for 5 hours add 1m sulfuric acid solutions and continue the reaction for 4 hours finally neutralize the solution by 1n ca oh 2 solution the product obtained is a brown viscous liquid polymer e5 by using the procedures in the example we can obtain a series of glycol ether derivatives of norbornene maleic anhydride copolymer in different molar ratios by reacting it with polyethylene glycol monomethyl ether with average molecular weight of 750 the derivatives are in a viscous liquid state put 26 5 units of norbornene maleic anhydride copolymer 1 5 molar ratio average molecular weight of 4500 obtained from example 1 in 100 units of isopropanol add 10 5 units of methoxy polyethylene glycol amine eo po 32 10 average molecular.